Multi-Parameter Sonde - Teledyne ISCO Sensor... · 1-1 AQ700 Multi-Parameter Sonde Section 1...

700Multi-Parameter Sonde

Operator Guide

Part #69-0603-042 of Assembly #60-0603-335Copyright © 2013 Teledyne Technologies Incorporated. All rights reserved.Released: September 16, 2013

http://www.isco.com

Foreword

This instruction manual is designed to help you gain a thorough understanding of the operation ofthe equipment. Teledyne Isco recommends that you read this manual completely before placing theequipment in service.

Although Teledyne Isco designs reliability into all equipment, there is always the possibility of amalfunction. This manual may help in diagnosing and repairing the malfunction.

If a problem persists, call or e-mail the Teledyne Isco Technical Service Department for assistance.Simple difficulties can often be diagnosed over the phone.

If it is necessary to return the equipment to the factory for service, please follow the shippinginstructions provided by the Customer Service Department, including the use of the ReturnAuthorization Number specified. Be sure to include a note describing the malfunction. Thiswill aid in the prompt repair and return of the equipment.

Teledyne Isco welcomes suggestions that would improve the information presented in this manualor enhance the operation of the equipment itself.

Teledyne Isco is continually improving its products and reserves the right to change productspecifications, replacement parts, schematics, and instructions without notice.

Contact Information

Customer Service

Phone: (800) 228-4373 (USA, Canada, Mexico)

(402) 464-0231 (Outside North America)

Fax: (402) 465-3022

Email: [email protected]

Technical Support

Phone: Toll Free (866) 298-6174 (Samplers and Flow Meters)

Toll Free (800) 775-2965 (Syringe Pumps and Liquid Chromatography)


Return equipment to: 4700 Superior Street, Lincoln, NE 68504-1398

Other Correspondence

Mail to: P.O. Box 82531, Lincoln, NE 68501-2531


Revised September 2012

AQ700 SondeSafety

iii

AQ700 SondeSafety

General Warnings Before installing, operating, or maintaining this equipment, it isimperative that all hazards and preventive measures are fullyunderstood. While specific hazards may vary according tolocation and application, take heed of the following generalwarnings:

WARNINGAvoid hazardous practices! If you use this instrument in any way not specified in this manual, the protection provided by the instrument may be impaired.

AVERTISSEMENTÉviter les usages périlleux! Si vous utilisez cet instrument d’une manière autre que celles qui sont specifiées dans ce manuel, la protection fournie de l’instrument peut être affaiblie; cela augmentera votre risque de blessure.

Hazard Severity Levels This manual applies Hazard Severity Levels to the safety alerts,These three levels are described in the sample alerts below.

CAUTIONCautions identify a potential hazard, which if not avoided, mayresult in minor or moderate injury. This category can also warnyou of unsafe practices, or conditions that may cause propertydamage.

WARNINGWarnings identify a potentially hazardous condition, which if not avoided, could result in death or serious injury.

DANGERDANGER – limited to the most extreme situations to identify an imminent hazard, which if not avoided, will result in death or serious injury.

AQ700 SondeSafety

iv

Hazard Symbols The equipment and this manual use symbols used to warn ofhazards. The symbols are explained below.

Hazard Symbols

Warnings and Cautions

The exclamation point within the triangle is a warning sign alerting you of important instructions in the instrument’s technical reference manual.

The lightning flash and arrowhead within the triangle is a warning sign alert-ing you of “dangerous voltage” inside the product.

Symboles de sécurité

Ce symbole signale l’existence d’instructions importantes relatives au produit dans ce manuel.

Ce symbole signale la présence d’un danger d’électocution.

Warnungen und Vorsichtshinweise

Das Ausrufezeichen in Dreieck ist ein Warnzeichen, das Sie darauf aufmerksam macht, daß wichtige Anleitungen zu diesem Handbuch gehören.

Der gepfeilte Blitz im Dreieck ist ein Warnzeichen, das Sei vor “gefährlichen Spannungen” im Inneren des Produkts warnt.

Advertencias y Precauciones

Esta señal le advierte sobre la importancia de las instrucciones del manual que acompañan a este producto.

Esta señal alerta sobre la presencia de alto voltaje en el interior del producto.

v

AQ700 Multi-Parameter Sonde

Table of Contents

Section 1 Introduction

1.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11.2 Connecting to Teledyne Isco Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11.3 Parameters and Units of Measure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

1.3.1 Current Draw Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-41.4 System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

1.4.1 Unpacking Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-61.5 Status Indicator Lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-61.6 Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-71.7 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Section 2 Software

2.1 Installing the Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12.2 Connecting the AQ700 to a Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.2.1 Disconnecting the AQ700 from a Computer . . . . . . . . . . . . . . . . . . . . . . . . . 2-12.3 Program Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22.4 Main Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.4.1 Hot Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32.5 PC Pull Down Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

2.5.1 Set Scroll Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-52.5.2 Set Snapshot Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-52.5.3 Automatic Snapshot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-52.5.4 Graphing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-62.5.5 Software Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

2.6 AQ700 Sonde Pull Down Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-62.6.1 Calibration Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-72.6.2 Sensors and Parameters List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-72.6.3 Calibrate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-72.6.4 AQ700 Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Section 3 Sensors and Calibration

3.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13.1.1 When to Calibrate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13.1.2 General Calibration Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13.1.3 Sensor Response Factor (SRF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3.2 Calibration Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-43.3 Sensor and Parameter List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-53.4 Sensor Descriptions and Specific Calibrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

3.4.1 AQ700 Time and Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-63.4.2 Set Barometric Pressure (BP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-73.4.3 Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-83.4.4 Dissolved Oxygen (DO) Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-83.4.5 DO: Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-83.4.6 DO: Zero-DO Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-93.4.7 Conductivity Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-93.4.8 Conductivity: Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

AQ700 Multi-Parameter SondeTable of Contents

vi

3.4.9 pH Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-103.4.10 pH: Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-103.4.11 Oxidation-Reduction Potential (ORP) Sensor . . . . . . . . . . . . . . . . . . . . . 3-103.4.12 ORP: Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-103.4.13 Depth Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-113.4.14 Depth: Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-113.4.15 Turbidity Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-113.4.16 Turbidity: Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Section 4 Maintenance, Troubleshooting, and Servicing

4.1 Routine Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14.2 O-Ring Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14.3 pH & ORP: Reference Electrode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24.4 DO Sensor Tip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24.5 Turbidity Sensor: Wiper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Appendix A Parts and Accessories

A.1 How to Order. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1A.2 Equipment and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1A.3 Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2A.4 Repair Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Appendix B Material Safety Data Sheets

B.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

List of Figures1-1 AQ700 system components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-41-2 AQ700 and SDI-12 Converter status indicator LEDs . . . . . . . . . . . . . . . . . . . . . . 1-61-3 AQ700 & SDI-12 Adapter physical dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-71-4 Example of a sonde installation in moving water . . . . . . . . . . . . . . . . . . . . . . . . . 1-92-1 AQ700 software chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22-2 AQ700 software: Main screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32-3 AQ700 software: PC Pull down menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42-4 PC Pull down menu: Set scroll interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-52-5 PC Pull Down Menu: Automatic Snapshot on or off . . . . . . . . . . . . . . . . . . . . . . . 2-62-6 AQ700 software: AQ700 pull down menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-62-7 AQ700 pull down menu: Calibration log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-72-8 AQ700 pull down menu: Sensor calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-83-1 Using the AQ700 Calibration cup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23-2 AQ700 with filled cup in place for storage or transport . . . . . . . . . . . . . . . . . . . . . 3-23-3 Calibration: Sensor Response Factor (SRF) – Example . . . . . . . . . . . . . . . . . . . . . 3-33-4 Exiting a successful calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-43-5 Viewing the calibration record (CAL.LOG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-43-6 Sensor and Parameter list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-53-7 Calibration menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-63-8 Setting the sonde’s date and time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-63-9 Setting the barometric pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-73-10 DO Measurement: Verifying correct barometric pressure . . . . . . . . . . . . . . . . . . 3-83-11 Turbidity sensor calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-124-1 Periodic Maintenance: Grease the o-rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14-2 pH and ORP: Changing the electrolyte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24-3 DO Sensor tip replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24-4 Removing the wiper from the turbidity sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3


vii

4-5 Preparing to clean the turbidity wiper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34-6 Reinstalling the wiper contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-44-7 Installing the wiper on the turbidity sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

List of Tables1-1 Connecting the AQ700 to Teledyne Isco Devices . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21-2 Sensor Parameters and Units of Measure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31-3 AQ700 Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8


viii

1-1


Section 1 Introduction

1.1 Overview The AQ700 Sonde is designed to monitor from one to ten waterquality parameters for the purpose of sampling, analysis, andprocess control.

The sonde’s ease-of-use design includes direct USB connection toyour computer, real-time data viewing, and LED indicators foroperating status.

Using SDI-12 protocol, the AQ700 can connect to the followingTeledyne Isco instruments:

• 6712 or Avalanche® Sampler

• Signature® Flow Meter

• 2105 Interface Module

1.2 Connecting to Teledyne Isco Devices

Sensor field cables are available in 3 different lengths:

• 5 meters

• 10 meters

• 15 metersThe AQ700 field cable connects to a Teledyne Isco sampler, flowmeter, or logging device with the appropriate SDI-12 adapter.Parameter measurements are always for the current sonde con-figuration.

NoteThe adapter identifies the connected sonde at power-up only,and will not acknowledge a sonde replacement or parameterchange until it is powered on and off.BEFORE connecting/disconnecting the SDI-12 adapter fromthe AQ700 sonde: Disconnect the SDI-12 Adapter from thesampler or 2105; disconnect power from the Signature.

Table 1-1 on the following page shows the devices that can beused with the AQ700, as well as the appropriate device con-nectors for operation with the AQ700.

6712/Avalanche connection

All sonde connections/disconnections must be made with theSDI-12 adapter disconnected from the sampler.

With the SDI-12 adapter disconnected, select NO SDI-12SONDE and accept NEW HARDWARE SETUP to clear the pre-vious sonde configuration. After connecting the AQ700 to theadapter, connect the adapter to the sampler and perform a scanto access the AQ700 parameters.

AQ700 Multi-Parameter SondeSection 1 Introduction

1-2

Signature connection All sonde connections/disconnections must be made with the Sig-nature disconnected from power. With the Signature’s power dis-connected, connect the new (or newly configured) sonde to theadapter. After the Signature’s power is restored, you must usethe Signature program screen to delete the old sonde from thesystem, then scan for and add the currently connected sonde tothe Active Sondes window, and Configure. Refer to your Sig-nature user manual for complete programming steps.

The Signature will not display the software version of theadapter.

2105 Connection All sonde connections/disconnections must be made with theSDI-12 adapter disconnected from the module.

The software version of the adapter will not appear in Flowlink.

1.3 Parameters and Units of Measure

There are two versions of the AQ700 to choose from, dependingon monitoring requirements. Table 1-2 on the following page liststhe sensors of both models, with their associated parameters andunits of measure (UOM), as well as specific information aboutassociated equipment.

Table 1-1 Connecting the AQ700 to Teledyne Isco DevicesTDY Device Connector Port6712 Series Samplers/Avalanche® Portable Refrigerated Sampler

RAIN GAUGE: 9-PIN FEMALE, SEALED

Signature® Flow Meter SEALED CABLE ENTRY:INTERNAL 6-TERMINAL STRIP

2105 Interface Module 12-PIN FEMALE SIDE CONNECTOR

A

B C

DF

G

H

E

I


1-3

Table 1-2 Sensor Parameters and Units of Measure

Sonde Sensor Parameters UOMSignature

Information6712/Avalanche

Information2105

Information

AQ

703

AQ

702

Temperature Temperature°F Ensure that the

AQ700 UOM isset for °C.

°C

pH/ORP

pH pH Units pH3 is displayedas ’0’ (Firmwareversion 1.21.010

and older)

ORP mV Displayed as’Volts’

Depth Depth

ft 1. The sampler willautomatically refer to depth as"level." If another level-sensing

device is connected to thesampler, that device’s

measurements will by default beused for flow conversion. If no

other level-sensing device isconnected it is recommended

that the sampler beprogrammed to record "Level

Only."

2. While depth is displayed infeet by the sampler, the "feet"

displayed in Flowlink is actuallythe equivalent in meters.

m

Conductivity

SpecificConductance

S/cmmS/cm

Salinity PPT

1. Not a defaultparameter; can

be manuallyadded.

2. Logged asPPM. Real-time

salinity displayedas PPT.

TDS

mg/L

Displayed as"PPM"

Logged as PPM;Displayed as g/L.

HDO HDO

Displayed as"T.D.S.3 ###g\l".Units are PPM.

HDO is mg/L islogged as g/L.

Real-time HDO isdisplayed as

mg/L.

%Saturation

The sampler will identify theseparameters in the generic

format: ##DATA#, where ## isthe data sequence value and #

is the sonde SDI-12 address.Write down the appropriate data

type next to the generic namefor your records. Once the data

is brought into Flowlink, datasets can be manually changed

so that reports show theappropriate labels.

Cable Power SuppliedVoltage VDC

No UOMdisplayed in

Measurementstab.

Turbidity Turbidity NTU


1-4

1.3.1 Current Draw Considerations

Total power consumption and battery life calculations aredependent on current draw values of all system components.

The average current draw of the AQ700 found at measurementintervals of one and 15 minutes are provided below:

1.4 System Components The AQ700 system components are identified in Figure 1-1,which is followed by a brief description of each component.

Figure 1-1 AQ700 system components

1 Minute Intervals 15 Minute Intervals

AQ702 51 mA 14 mA

AQ703 66 mA 15 mA

2105

SignatureAQ700Sonde

WeightedSensor Guard

WeightedSensor Guard

AQ700Sonde

Field Cable --For Operation

SDI-12Adapter

PC Cable w/ DB9 Connector--For Computer Connection Only

USB Adapter

AQ700Software

6712/Avalanche


1-5

Field Cable – The field cable connects the AQ700 to yourTeledyne Isco sampler or flow meter. It is available in lengths of5, 10, and 15 meters.

SDI-12 Adapter – The adapter connects the AQ700’s field cableto another Teledyne Isco device. The adapter converts SDI-12data to serial data, and vice versa. Select the appropriateadapter type, depending on which Teledyne Isco instrument youare using with the AQ700.

Storage /Calibration Cup (Not Pictured) – The cup shouldcontain a few ounces of tap water to keep the sensors moist.Screw it onto the end of the sonde securely.

The cup is also used to hold standards for calibrating the sensors.

CAUTIONDo not over fill the cup, or allow the water to freeze. Never useanything other than tap water for storage.

Maintenance Kit (Not Pictured) – This kit contains:

• Reference electrode filling solution (for pH)

• Silicone o-ring grease

CAUTIONOnly use silicone grease. Other kinds of lubricants may chemi-cally attack the o-ring.

• Replacement turbidity sensor wiper and Allen wrench (AQ703 only; see Turbidity Sensor: Wiper, page 4-3 for instructions).

AQ700 Software – This software allows you to connect theAQ700 directly to your computer through a serial port to viewdata, configure the sensors, and calibrate the sonde.

PC Cable – This DB-9 terminated cable connects the AQ700 to aserial port on your computer. Do not attempt to use this cable forconnection to other equipment.

USB Adapter – The USB adapter connects the computer cableto a USB port on your computer.

CAUTIONNever use the AQ700 USB Adapter with anything other thanthe AQ700 and your computer. This adapter has been modifiedto supply power to the sonde. Other devices may not workproperly with, or could possibly be damaged by, the USBAdapter.

Weighted Sensor Guard – The sensor guard replaces thestorage/calibration cup during deployment, holding the sonde inplace while protecting its sensors.


1-6

1.4.1 Unpacking Instructions

When the system arrives, inspect the outside packing for anydamage. Then carefully inspect the contents for damage. If thereis damage, contact the delivery company and Teledyne Isco (or itsagent) immediately.

WARNINGIf there is any evidence that any items may have been damaged in shipping, do not attempt to install the unit. Please contact Teledyne Isco (or its agent) for assistance.

When you unpack the system, check the items against thepacking list. If any parts are missing, contact the deliverycompany and Teledyne Isco’s Customer Service Department.When you report missing part(s), please indicate them by partnumber. In addition to the main packing list, there may be otherpacking lists for various sub-components.

It is recommended that you retain the shipping cartons as theycan be used to ship the unit in the event that it is necessary totransport the system. Please complete the registration card andreturn it to Teledyne Isco.

1.5 Status Indicator Lights Both the AQ700 and the SDI-12 adaptor have threelight-emitting diodes (LEDs) mounted on the circuit board andviewable from the outside through the transparent housing.These LED lights indicate the instrument’s operating status, andcan be useful for troubleshooting possible site problems.

Figure 1-2 AQ700 and SDI-12 Converter status indicator LEDs

Green LED –The green LEDbl inks everysecond when thesensor i srece iv ing ade-quate operatingvoltage throughthe cable.

Yel low LED –The yellow LEDblinks when thesensor i sreceiving RS-232communications.

Red LED – Thered LED blinksbr ie f ly uponpower-up.

GYR

Green LED –The green LEDpulses when theconverter’s CPUis ready toperform.

Yellow LED –The yellow LEDis used for factorydiagnostics.

Blue LED – Theblue LEDremains on whenpower for theAQ700 is present,with or withoutan AQ700 con-nected.

GYB

AQ700

SDI-12 Converter


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1.6 Technical Specifications

Table 1-3 on the following page provides technical specificationsfor the AQ700 and its individual sensors.

NoteAccuracy is influenced by the quality of the calibration standardand adherence to calibration procedures. Specific calibrationprocedures and qualifying information is provided in Sensorsand Calibration, beginning in Section 3.

Dimensions of the AQ702 and AQ703 are shown below inFigure 1-3.

Figure 1-3 AQ700 & SDI-12 Adapter physical dimensions

16" (40.64 cm)

AQ702 1.95" (4.95 cm)AQ703 2.95" (7.49 cm)

1.25" (3.2 cm)

4.8" (12.2 cm) 6.5" (16.5 cm)


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Table 1-3 AQ700 Technical Specificationsa

Weight (w/ weighted sensor guard)AQ702AQ703

In air 2.6 lbs (1.18 kg); In water 1.6 lbs (0.7 kg)In air 5.2 lbs (2.3 kg); In water 1.2 lbs (0.54 kg)

Wetted Materials PVC, 316 SST, Acetal, Polycarbonate, PTFE, Viton, Glass, Graphite, Silicone, Urethane, Platinum, Acrylic

TemperatureNOTE: Use only 1 tablespoon of water in storage cup to pre-vent water from freezing on sensors.

Operating: 23 to 122 °F (-5 to 50 °C)Storage: 14 to 140 °F (-10 to 60 °C)

Power 12VDC Supplied by connected sampler or flow meter,or USB connection to computerNOTE: Input voltage is a configurable data parameter.

Communication SDI-12 Protocol and RS-232

Sensorsb

Temperature Measurement range: -5 to 50 °C (23 to 122 °F)Resolution: 0.01 °C (0.01 °F)Accuracy: ±0.1 °C

Optical Dissolved Oxygen (HDO)(Alternative parameter: Percent Saturation)

Compensated for temperature and salinity.Measurement range: 0 to 20 mg/LResolution: 0.01 mg/LLinearity: ±0.2 mg/L

Conductivity

Additional Parameters:Salinity, Total Dissolved Solids (TDS)

Specific Conductance corrected for temperature.Measurement range: 0 to 100,000 µS/cm

Resolution:0.1 µS/cm (0 - 999.9)1 µS/cm (1000 to 9,999)10 µS/cm (10,000 to 99,990)

Linearity:±1% of reading ±1 µS/cmc

pH

Calibration: Two points or three points with standard buffers.

Corrected for temperature.Measurement range: 0 to 14 pH unitsResolution: 0.01 pH unitsLinearity: ±0.2 pH units

Oxidation Reduction Potential (ORP) Measurement range: -999 to 999 mVResolution: 1 mVLinearity: ±20 mV

Depth Measurement range: 0 to 15 m (0 to 49 ft)Resolution: 0.01 m (0.01 ft)Linearity: ±0.05 m

Turbidity Measurement range: 0 to 3,000 NTUResolution:

0.1 (0 - 999.9 NTU)1 (1000 to 3000 NTU)

Linearity:±2% of reading ± 2 NTUd

a. Individual sensor specifications are at 25 °C.

b. Accuracy is influenced by the quality of the calibration standard and adherence to calibration procedures (refer to Sensorsand Calibration, beginning in Section 3).

c. The stated accuracy is achieved over a range from zero to twice the calibration point for calibration done at or below 2,000µS/cm, or 1/2 to twice the calibration point if the calibration point is above 2,000 µS/cm.

d. Calibrated at 600 NTU and zero at room conditions.


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1.7 Installation The AQ700 sonde can bemounted horizontally or verti-cally, depending on site require-ments.

Although the sonde can be sus-pended without fixed mountingin calmer waters, it is generallyrecommended to secure thesonde to a fixed object usinglarge cable ties (see figure atright), with the field cable routedabove the flow stream.

Figure 1-4 Example of a sonde installation in moving water


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2-1


Section 2 Software

2.1 Installing the Software The AQ700 Sonde can communicate directly with a computerwith AQ700 software installed. To install the software on yourcomputer, insert the AQ700 software CD in your computer’sCD-ROM drive. The software installation instructions will auto-matically open in a PDF file. Follow the instructions specific toyour operating system.

When you open the program, the main screen will appear. If yourAQ700 is connected to the computer, the screen will displayreal-time data from the sensor.

To place a shortcut to the program on your computer desktop,click Start All Programs > AQ700 folder, and drag the AQ700Software icon onto your desktop.

2.2 Connecting the AQ700 to a Computer

Connect the AQ700 to the computer’s serial port using the sup-plied computer cable (refer to Figure 1-1 AQ700 system compo-nents).

NoteOnly connect one sonde at a time to the same computer.

To connect to a computer’s USB port, simply add the AQ700 USBadapter to the end of the computer cable.

CAUTIONNever use the AQ700 USB Adapter with anything other thanthe AQ700 and your computer. This adapter has been modifiedto supply power to the sonde. Other devices may not workproperly with, or could possibly be damaged by, the USBAdapter.

2.2.1 Disconnecting the AQ700 from a Computer

Close the AQ700 PC software program before unplugging thecable.

AQ700 Multi-Parameter SondeSection 2 Software

2-2

2.3 Program Screens Figure 2-1 provides a chart of the AQ700 software screens, with abrief explanation of each screen. You can step through thescreens to become familiar with the steps. To discard changesand return to the main screen, simply press Cancel.

Figure 2-1 AQ700 software chart

Select computer scrollinterval in seconds Cal Log...

Sensors andParameters List...

Calibrate...

View details of allcalibrations

Select parameters andorder of appearance

Set BP...

Set Time and Date...

[Parameter Names]

Select any of fourentry methods

Enter time & date,or sync w/ computer

Follow parameter-specificcalibration instructions

Saves one line of dataevery scroll interval.

PC

Set ScrollInterval...

Set SnapshotLocation...

AQ700

MS Windows standard“Save As” function

Choose a serial porton your computer

View measurement datain graphical format

AutomaticSnapshot...

Graphing...

COM Ports


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2.4 Main Screen The main screen is the first screen to appear upon opening theAQ700 software program. From this screen, you can access allother AQ700 functions, including two pull down menus, five hotbuttons (shortcuts to frequently-performed tasks), real-time datadisplay (the most recent line of data will be highlighted inyellow), and local information along the bottom.

Figure 2-2 AQ700 software: Main screen

2.4.1 Hot Buttons On the main screen, the hot buttons are used to performimportant tasks without leaving the main screen.

Capture One Line of Data to PC with Annotation –Click this button to save the mostrecent line of data (highlighted inyellow on the main screen) to aSnapshot file. A “snapshot” is a smalllog file preserving one line of data. (Refer to Section 2.5.2), alongwith a brief note containing any comments you want to append tothe data. The note will be saved along with the data to theSnapshot file.

Pull down menus (2) Hot Buttons (5)

Latest data

Real-timeData

Local Information


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Capture One Line of Data to PCwithout Annotation – Cl ick th isbutton to save the most recent line ofdata (highlighted in yellow on themain screen) to a Snapshot file. A “snapshot” is a small log filepreserving one line of data. (Refer to Section 2.5.2).

Wipe One Cycle Now – For theAQ703, this button activates a singlecycle of the turbidity sensor’s wiper.

Restart AQ700 Software – Cl ickthis button to cycle the AQ700program off and on again.

Clear Data from PC Display –Click this button to clear the mainscreen of all visible data, and startover with only the most recent data.

2.5 PC Pull Down Menu From the main screen, the PC pull down menu contains a list ofsix functions relating to the software and computer tasks.

Figure 2-3 AQ700 software: PC Pull down menu


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2.5.1 Set Scroll Interval Click this opt ion tochange the length oft ime in secondsbetween updates to thelines of data displayedon the main screen. Youcan select an intervalfrom the list, or enterthe preferred interval.

Figure 2-4 PC Pull down menu: Set scroll interval

2.5.2 Set Snapshot Location A “snapshot” is a small log file preserving the most recent line ofdata, created when you click either of the Capture One Line ofData... hot buttons.

To specify the folder where your snapshot files are saved, selectSet Snapshot Location and follow the standard Windows pro-cedure for saving a file in a desired folder. By default, the formatfor the snapshot is a .log file, but you can also save it as a .csvfile.

The Snapshot File location will appear in the bottom line of themain screen.

2.5.3 Automatic Snapshot A “snapshot” is a small log file preserving the most recent line ofdata, created when you click either of the Capture One Line ofData... hot buttons.

Select Automatic Snapshot to turn On or Off rapid, automaticdata logging. When this function is enabled, lines of data aresaved to the snapshot file folder at the same interval as they aredisplayed on the main screen—as previously determined by SetScroll Interval (Figure 2-4).

The snapshot files will be stored in the folder determined byselecting Set Snapshot Location.


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Figure 2-5 PC Pull Down Menu: Automatic Snapshot on or off

2.5.4 Graphing Select Graphing to view the AQ700 data in graphical form.

NoteAnother way to view the data graphically is to save thesnapshot data to .csv format and graph it using a spreadsheetprogram like Microsoft® Excel.

When the AQ700 software program is started, it automaticallysearches all active serial ports until it identifies a connectedAQ700. This halts the search. However, if you have more thanone sonde connected to the computer, you can use COM Ports toselect a different serial port and access the desired sonde.

2.5.5 Software Version This menu selection simply displays the version and release dateof the AQ700 software running on the PC.

2.6 AQ700 Sonde Pull Down Menu

From the main screen, the AQ700 pull down menu contains threeselections related to sensor function.

Figure 2-6 AQ700 software: AQ700 pull down menu


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2.6.1 Calibration Log To download a permanent record from the sonde of all calibrationchanges and dates, select Cal Log. This data can be saved to afolder of your choice in .csv format. For complete informationabout the data in this record, refer to Calibration Log, page 3-4.

Figure 2-7 AQ700 pull down menu: Calibration log

2.6.2 Sensors and Parameters List

The Sensors and Parameters list displays all parameters sup-ported by the AQ700, and information about them. From thisscreen, you can enable or disable each parameter, and change theorder in which they appear.

For complete information about using this list, refer to Sensorand Parameter List, page 3-5.

2.6.3 Calibrate Select Calibrate to open a drop down list of all parameters thatcan be calibrated. Click the desired parameter to open its cali-bration screen. Each parameter’s calibration screen contains cal-ibration instructions specific to that parameter, and also displaysthe current reading for that parameter. For complete instructionson using this menu, refer to General Calibration Procedures,page 3-1 and Sensor Descriptions and Specific Calibrations, page3-6.


2-8

Figure 2-8 AQ700 pull down menu: Sensor calibration

Settings for the AQ700’s Date and Time, and BarometricPressure are also included in the Calibrate drop down list. Forcomplete instructions on using these features, refer to AQ700Time and Date, page 3-6 and DO: Calibration, page 3-8.

2.6.4 AQ700 Version Select AQ700 Version to see the sonde’s firmware version andserial number.

3-1


Section 3 Sensors and Calibration

3.1 Overview The instructions in this general section apply to all sensor types.Calibration procedures specific to each sensor type are providedlater in this section.

Keep in mind that measurement accuracy is only as good as thecalibration standard used and adherence to the calibration pro-cedure. Never use a solution that has expired, and always waitfor the readings to stabilize before saving a calibration.

3.1.1 When to Calibrate The frequency of calibration depends largely on your accuracyrequirements and site conditions.

Frequent calibrations normally yield better data—particularly ifthe AQ700 is used across multiple ranges of water conditions. Todetermine whether or not calibration is needed, check yoursensor against a known sample. If the reading falls within thesensor’s specification and/or your requirements, calibration is notnecessary.

Replacement of any sensor or reference solution should be fol-lowed by calibration.

3.1.2 General Calibration Procedures

Prior to calibration, ensure that the AQ700’s sensors are all cleanand well-maintained.

1. Select a calibration standard with a value similar to what you expect to measure in the field. For best results, use fresh calibration standards, discarding them after one use.

NoteDo not calibrate using a seawater standard.

NoteIf the water you are monitoring tends to be acidic, calibrateyour pH sensor with a buffer of 4 rather than 10.

2. Thoroughly rinse the sensors, as many times as necessary, with deionized water, especially if they have been sub-merged in other calibration solutions. Shake the AQ700 vigorously to shake off remaining traces of solution.

3. Rinse the sensors twice with a small amount of the calibra-tion standard. Discard the used calibration standard.

4. Remove the cap from the calibration cup and screw the cup onto the end of the AQ700. Turn the sonde upside-down, and pour the calibration standard into the cup, making

AQ700 Multi-Parameter SondeSection 3 Sensors and Calibration

3-2

sure all sensors are completely covered, including the thermistor (for parameters that are temperature-compen-sated).

NoteDo not put the cap on during calibration.

Figure 3-1 Using the AQ700 Calibration cup

5. Select the parameter to be calibrated.

a. Click the AQ700 pull down menu.

b. Click Calibrate, then select the desired parameter from the drop down list.

c. Type in the value of the calibration standard and press Enter.

d. Wait for the reading to stabilize. Press Enter to cal-ibrate.

6. If not installing the AQ700 right away, thoroughly rinse the cup and sensors, then refill the cup with tap water and screw the cap back on.

Figure 3-2 AQ700 with filled cup in place for storage or transport

Remove cap & screw on cup Cover all sensors with standard


3-3

3.1.3 Sensor Response Factor (SRF)

The term Sensor Response Factor (SRF) refers to the value dis-played at the end of the calibration, indicating whether or notyour calibration was acceptable. An SRF between 60% and 140%is considered acceptable.

If the SRF is outside this range, ensure that conditions areacceptable for this calibration:

• Wait for the reading to fully stabilize before pressing Enter.

• Ensure that the sensor is clean.

• Ensure that the calibration standard is the correct value and is not contaminated.

If you click OK, regardless of whether or not the SRF is withinthe acceptable range, the calibration will be stored, and you willbe returned to the main screen. If you click Quit, the calibrationwill not be stored.

Figure 3-3 Calibration: Sensor Response Factor (SRF) – Example


3-4

After you click OK to accept the SRF, a window will appearbriefly indicating a successful calibration. Do not click thebuttons in this window; it will disappear on its own.

Figure 3-4 Exiting a successful calibration

3.2 Calibration Log Every accepted calibration of the AQ700 is saved in a permanentrecord in the sonde’s memory, under the filename CAL.LOG. Thefile includes the date and time, parameter being calibrated,sensor serial number, readings before and after calibration (Oldand New), and the SRF number (see previous section). This filecan be viewed with the AQ700 software program and saved toyour computer.

This data cannot be deleted or edited.

Figure 3-5 Viewing the calibration record (CAL.LOG)

Do not click inthis window.


3-5

3.3 Sensor and Parameter List

The sensor and parameter list displays a list of all of the possibleparameters the sonde can measure, along with the sensor that isused to measure each one. It also displays the SRF for thatsensor, its firmware version, port connection, and serial number.

Before enabling a parameter, ensure that the sonde has a sensorfor that parameter installed in order to have valid data.

To enable or disable a parameter, check or uncheck the box nextto it. To move a parameter up or down the list, highlight theparameter and then click the up or down arrow in the lower leftcorner. To save any changes and close the window, click OK.

When this window is closed, the data display will clear and startover.

Figure 3-6 Sensor and Parameter list


3-6

3.4 Sensor Descriptions and Specific Calibrations

Before performing the sensor-specific calibration procedures pro-vided in this section, be sure to read the general calibration infor-mation provided in Section 3.1.2 General CalibrationProcedures.

The following sections describe settings accessed via the AQ700 >Calibrate menu.

Figure 3-7 Calibration menu

3.4.1 AQ700 Time and Date Click Set Time and Date to view the AQ700’s current time anddate. To change any of these values, either type them in or clickSync with PC to synchronize the sonde’s time and date withthose of your computer. To save your settings, click OK.

Figure 3-8 Setting the sonde’s date and time


3-7

3.4.2 Set Barometric Pressure (BP)

The Barometric Pressure value impacts the HDO % saturationvalue. The Set Barometric Pressure window can be accessedeither directly from the Calibrate menu, or via the Calibrate >HDO screen > BP.

The BP can be set using one of three methods.

Enter BP (mm/Hg) This method is mainly used in short-term testing where you maywant to correct for effects of current weather.

Enter the actual BP in mm/Hg in the first field. When this valueis entered, the elevation will automatically appear in the secondfield.

NoteKeep in mind that the barometric pressure reported by thelocal airport will be corrected for sea level. The value you enterfor calibration must not be corrected for sea level.

Enter elevation (ft) This is the most accurate method if you are calibrating off-sitebefore taking the sonde to the installation site.

Enter the elevation in feet in the second field. When this value isentered, the BP will automatically appear in the first field.

Read BP (depth sensor) This is the most accurate method if you are calibrating on-site.

Remove the calibration cup from the AQ700 and make sure thedepth sensor is exposed to the open air. The correct values willautomatically appear in the BP and elevation fields.

Figure 3-9 Setting the barometric pressure


3-8

3.4.3 Temperature Sensor The temperature sensor is a thermal electricalresistor (thermistor), whose resistance changespredictably with the temperature. The sensor isprotected by a stainless steel tube.

Thermistors do not require calibration.

3.4.4 Dissolved Oxygen (DO) Sensor

The optical DO sensor comprises a blue light source, a sensingsurface, and a red light receiver. The sensing surface is anoxygen-active compound stabilized in an oxygen-permeablepolymer. When the sensing surface is exposed to water (or air),oxygen diffuses into the sensing surface according to the amountof oxygen in the water.

The oxygen-active compound fluoresces (absorbs energy in theform of blue light and emits energy in the form of red light). Theblue light pulses once for each measurement cycle. The receivermeasures the duration of the fluorescence following the pulse.

This measured duration is proportional to dissolved oxygen.

The sensor output is corrected for temperature characteristics ofboth the membrane and of oxygen saturation in water.

Note that the optical DO sensor does not consume oxygen. Conse-quently, an oxygen-active fouling, such as algal growth, maycause exaggerated reports of oxygen data. Consider this factorwhen selecting the installation site and calculating how often toclean the sensor (refer to Routine Cleaning, page 4-1).

3.4.5 DO: Calibration If your AQ700 is using a DO sensor, it must know the correctbarometric pressure. Always verify that the BP is correct prior toDO calibration. From the Calibrate menu, select HDO % Sat. Ifthe BP displayed in Hg is incorrect, click the BP button to get tothe Set Barometric Pressure window.

Figure 3-10 DO Measurement: Verifying correct barometric pressure


3-9

Then perform the following steps.

1. Pour 0.5 L of tap water in a 1L jar, seal the lid, and aerate the water by shaking the jar vigorously for one minute.

2. Remove the lid, and let the water stand for about five min-utes to allow the air bubbles to escape.

3. Screw the calibration cup onto the end of the sonde, and turn the sonde upside-down. Fill the cup with the aerated water, ensuring that the DO and temperature sensors are completely covered.

4. Allow ten minutes for equilibration. Then follow “General Calibration Procedures” on page 3-1, using % sat.

3.4.6 DO: Zero-DO Verification

Although the AQ700 software does not support zero-DO cali-bration, the sensor’s zero-DO reading can be verified usingnitrogen gas.

Simply seal the sensor end of the AQ700 in a plastic bag, venti-lated with a small hole, and feed nitrogen gas into the bag.

NoteIf you are using a high-pressure gas tank, use a two-stage reg-ulator.

3.4.7 Conductivity Sensor The AQ700’s conductivity sensor uses two pairs ofgraphite electrodes to determine water conduc-tivity. A constant voltage is applied to one of eachpair, and the amount of current required tomaintain that voltage is measured. The currentwill increase or decrease in proportion to thewater conductivity.

The AQ700 reports Specif ic Conductance,meaning the sensor performs a measurementstandardized to a water temperature of exactly25°C.

The conductivity value can be used to calculatethe custom parameters Total Dissolved Solids (TDS) or salinity.

3.4.8 Conductivity: Calibration

Choose a calibration solution that best addresses the range ofvalues expected at the site.

The best accuracy is achieved at measurement values closest tothe calibration point.

Screw the calibration cup onto the end of the AQ700 and fill itwith the conductivity standard, ensuring that the sensor is com-pletely covered. Gently tap on the cup to make sure no bubblesare trapped in the sensor.

The conductivity sensor’s zero point is set electronically, so youonly have to set the “slope” point.

Follow the instructions in “General Calibration Procedures” onpage 3-1.


3-10

3.4.9 pH Sensor pH is measured as a voltage drop between aglass membrane containing an electrolyte,and a reference electrode. The glass voltagechanges in response to changes in the ionicconcentration of the water, which isproportional to the pH level. This change involtage potential is converted into the pHreading.

pH readings are automatically compensatedfor temperature.

3.4.10 pH: Calibration When a pH calibration is performed, all previous calibrationinformation will be erased. Therefore, if the sensor was previ-ously calibrated with three buffers, a two-point calibration woulderase all of the third point data, and the two-point calibrationwould be used from then on.

A two-point calibration generally uses a seven buffer, and asecond buffer with a value near that of the waters you intend tomonitor.

1. Rinse the sensors several times with the pH calibration buffer.

2. Fill the calibration cup with enough buffer to cover both electrodes.

3. Follow “General Calibration Procedures” on page 3-1 for pH units.

4. Repeat these steps for each calibration standard.

3.4.11 Oxidation-Reduction Potential (ORP) Sensor

ORP is measured as the voltage dropacross the platinum membrane of ane lec trode. A re ference e lec trodecompletes the measuring circuit.

The ORP sensor appears as a tiny, silverdot viewed when looking down at the pHsensor.

3.4.12 ORP: Calibration ORP uses a one-point calibration.

1. Rinse the sensors several times with the ORP calibration standard.

2. Fill the calibration cup with enough ORP standard to cover the electrodes.

3. Follow the instructions in “General Calibration Proce-dures” on page 3-1 for ORP mV.

3.4.13 Depth Sensor The depth sensor has an internal pressure transducer.


3-11

The hydrostatic pressure exerted on the transducer isproportional to its distance below the surface of the stream.

Depth should not be used as a measure of the water level. Depthis not recommended as a factor for flow conversion.

3.4.14 Depth: Calibration Depth calibration consists of simply allowing the reading to zerowhile the sensor is in the open air. Make sure the calibration cupis not installed.

1. Ensure that the sensors are in open air and not in water.

2. Select the parameter to be calibrated.

a. Click the AQ700 pull down menu.

b. Click Calibrate, then select “Depth m” or “Depth ft” from the drop down list.

c. Allow the depth reading to stabilize and click OK.

3.4.15 Turbidity Sensor Turbidity is measured as the fraction of aninfrared light beam scattered at 90° to that beam.More particles in the water means more lightscattered, making the turbidity reading higher.

Any material that accumulates on the opticalsurface of the sensor is indistinguishable frommaterial in the water; therefore, the sensor has asmall wiper to periodically clean the window.

The wiper activates once when the SDI-12 con-verter first powers up, and then once before eachreading is taken.

Turbidity sensors require no regular maintenance, other thanoccasional inspection of the optical window and wiper to ensurethat they are stil l clean and undamaged. A clogged ordeteriorated wiper pad can lead to a dirty window. For wiper padreplacement instructions, refer to Turbidity Sensor: Wiper, page4-3.

3.4.16 Turbidity: Calibration Turbidity calibration consists of two points: One point is zero tur-bidity (de-ionized water), and the other should be a standardapproximating the turbidity of the water you intend to monitor.Standards made for drinking water should not be used.Polymer-bead calibration solutions are recommended for theirstability and safety. For best results, use the same type of cali-bration standard every time.

NoteUnlike the other sensors, the turbidity sensor should not becalibrated using the AQ700’s calibration cup, as the sensorrequires a larger optical sensing field than the cup allows.


3-12

NoteEnsure that the sensor’s optical sensingfield (about the volume of a tennis ball) isfree of obstruction and untouched by light.The calibration solution is typically kept in adark-colored, one-liter, wide-mouth bottlewith a non-reflective finish to ensure thatthe sensor ’s op t ica l f ie ld is f ree o finterference from container walls or otherobjects, and/or light scatter.

Figure 3-11 Turbidity sensor calibration

4-1


Section 4 Maintenance, Troubleshooting, and Servicing

4.1 Routine Cleaning To keep the AQ700 Sonde in optimal condition, clean it periodi-cally with warm water, a soft cloth, and dish soap. Clean thesensor stems with a soft brush.

CAUTIONNever use abrasives, acetone, gasoline, kerosene, or industrialcleaners.

Rinse thoroughly with tap water. Store the sensors in the storagecup filled with tap water.

4.2 O-Ring Lubrication Whenever the calibration/storage cap or field cable is removed,re-apply silicone grease to the exposed o-rings. Apply the greasegenerously, in particular to the o-rings of the field cable con-nector. Silicone grease is included in the maintenance kit.

CAUTIONOnly use silicone grease. Other kinds of lubricants may chemi-cally attack the o-ring.

Figure 4-1 Periodic Maintenance: Grease the o-rings

AQ700 Multi-Parameter SondeSection 4 Maintenance, Troubleshooting, and Servicing

4-2

4.3 pH & ORP: Reference Electrode

For continued reliable measurement, the pH and ORP referenceelectrolyte should be replaced every 1 to 2 months, depending onthe type of water you are monitoring.

The maintenance kit that comes with the AQ700 includes a120 mL. bottle of electrolyte.

1. Unscrew the reference cap from the sleeve and discard the old electrolyte.

2. Fill the sleeve completely with fresh electrolyte, taking care not to introduce any air bubbles.

3. Screw the reference cap back onto the sleeve.

Figure 4-2 pH and ORP: Changing the electrolyte

As you screw the sleeve into place, the excess electrolyte is forcedout through the reference electrode junction (white, porous circleat the end of the sleeve). This helps to purge air from the elec-trolyte, and cleans residue out of the junction.

4.4 DO Sensor Tip The tip of the optical DO sensor must be replaced periodically,i.e., usually every few years.

The need for replacement is usually indicated by erraticreadings. Simply unscrew the old tip, screw in a new one, andrecalibrate the sensor.

Figure 4-3 DO Sensor tip replacement


4-3

4.5 Turbidity Sensor: Wiper

A clean wiper means better measurements. If the wiper is deteri-orated or clogged with debris, it can be cleaned or replaced.

The AQ703 maintenance kit contains a replacement wiper and1.5 mm Allen wrench.

CAUTIONNever rotate the wiper arm manually; doing so will cause seri-ous damage to the sensor.

To clean or replace the turbidity wiper:

1. Using the Allen wrench, loosen the set screw on the wiper, and remove it from the motor shaft.

Figure 4-4 Removing the wiper from the turbidity sensor

a. If cleaning the wiper, pull the rubber contact out of the arm.

Figure 4-5 Preparing to clean the turbidity wiper

b. Clean the arm and contact with warm water and a soft brush or cloth.

c. Push the contact all the way back into the arm, making sure the pointed side of the contact is on the flanged side of the arm.

Loosen setscrew


4-4

Figure 4-6 Reinstalling the wiper contact

2. Install the wiper on the motor shaft with the set screw fac-ing the flat of the motor shaft and the rounded side of the contact facing up.

Figure 4-7 Installing the wiper on the turbidity sensor

3. Gently press the wiper toward the face of the probe until the rubber contact is compressed to roughly 3/4 of its origi-nal thickness.

CAUTIONDo not let the wiper arm touch the probe face. Only the contactshould touch.

The gap is correctly set if you can slide a sheet of paperunder the contact, but the contact will still hold the paperin place.

4. Tighten the set screw until normal resistance is felt.

CAUTIONDo not over-tighten the set screw; this will strip the wiper’splastic threads.

Point

Flange

Flat

Rounded

A-1


Appendix A Parts and Accessories

A.1 How to Order Parts and accessories can be purchased by contacting TeledyneIsco’s Customer Service Department.

Teledyne IscoCustomer Service Dept.P.O. Box 82531Lincoln, NE 68501 USA

Phone: (800) 228-4373(402) 464-0231

FAX: (402) 465-3022

E-mail: [email protected]

A.2 Equipment and Accessories

AQ702 Sonde . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600603302

Includes 1.95"ø Sonde w/ temperature, conductivity, refer-ence, pH/ORP, DO, & level sensors; Maintenance kit, cali-bration cup, weighted sensor guard, computer cable, USBconverter, AQ700 software.

AQ703 Sonde . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600603303

Includes 2.95"ø Sonde, same items as AQ702 kit, plus tur-bidity sensor w/ wiper.

Field Cable 5 m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600603314

Field Cable 10 m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600603315

Field Cable 15 m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600603316

SDI-12 Adapter 6712 . . . . . . . . . . . . . . . . . . . . . . . . . . . 600603321

SDI-12 Adapter Signature. . . . . . . . . . . . . . . . . . . . . . . 600603322

SDI-12 Adapter 2105 . . . . . . . . . . . . . . . . . . . . . . . . . . . 600603320

Maintenance kit AQ702. . . . . . . . . . . . . . . . . . . . . . . . . 600603331

Maintenance kit AQ703. . . . . . . . . . . . . . . . . . . . . . . . . 600603332

Manual/Software CD . . . . . . . . . . . . . . . . . . . . . . . . . . . 600603335

USB Cable Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600603336

Computer Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600603337

DO Replacement Cap. . . . . . . . . . . . . . . . . . . . . . . . . . . 600603343

Reference Electrode Replacement Cap . . . . . . . . . . . . . 600603344

AQ700 Multi-Parameter SondeAppendix A Parts and Accessories

A-2

A.3 Replacement Parts Weighted Sensor Guard AQ702 . . . . . . . . . . . . . . . . . . 600603340Weighted Sensor Guard AQ703 . . . . . . . . . . . . . . . . . . 600603330

Calibration Cup AQ702 . . . . . . . . . . . . . . . . . . . . . . . . . 600603333

Calibration Cup AQ703 . . . . . . . . . . . . . . . . . . . . . . . . . 600603334

Nut, Underwater Cable . . . . . . . . . . . . . . . . . . . . . . . . . 600603341

Connector Dummy Plug . . . . . . . . . . . . . . . . . . . . . . . . 600603342

A.4 Repair Parts Temperature Sensor AQ702 . . . . . . . . . . . . . . . . . . . . . 600603304Temperature Sensor AQ703 . . . . . . . . . . . . . . . . . . . . . 600603311

Conductivity Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . 600603305

Reference Electrode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600603306

pH/ORP Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600603307

Optical HDO Sensor – AQ702 . . . . . . . . . . . . . . . . . . . . 600603308

Optical HDO Sensor – AQ703 . . . . . . . . . . . . . . . . . . . . 600603312

Depth Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600603309

Turbidity Sensor w/ Wiper AQ703 . . . . . . . . . . . . . . . . 600603313

B-1


Appendix B Material Safety Data Sheets

B.1 Overview This appendix to the manual provides Material Safety DataSheets for the reference-electrode electrolyte and silicone greasein the AQ700 maintenance kits.

Teledyne Isco cannot guarantee the accuracy of this data. Spe-cific questions regarding the use and handling of the productsshould be directed to the manufacturer listed on the MSDS.

AQ700 Multi-Parameter SondeAppendix B Material Safety Data Sheets

B-2


B-3


B-4


B-5

DOW CORNING CORPORATION Material Safety Data Sheet

Page: 1 of 7 Version: 1.6

Revision Date: 2012/04/30MOLYKOTE(R) 111 COMPOUND

1. PRODUCT AND COMPANY IDENTIFICATION

Dow Corning Corporation South Saginaw Road Midland, Michigan 48686

24 Hour Emergency Telephone:Customer Service:

Product Disposal Information: CHEMTREC:

(989) 496-5900(989) 496-6000 (989) 496-6315 (800) 424-9300

MSDS No.: 01889834 Revision Date: 2012/04/30

Generic Description: Silicone grease. Physical Form: Grease

Color: Translucent white Odor: Odorless

NFPA Profile: Health 0 Flammability 1 Instability/Reactivity 0

Note: NFPA = National Fire Protection Association

2. HAZARDS IDENTIFICATION

POTENTIAL HEALTH EFFECTS

Acute Effects

Eye: Direct contact may cause temporary redness and discomfort.

Skin: No significant irritation expected from a single short-term exposure.

Inhalation: No significant effects expected from a single short-term exposure.

Oral: Low ingestion hazard in normal use.

Prolonged/Repeated Exposure Effects

Skin: No known applicable information.

Inhalation: No known applicable information.

Oral: No known applicable information.

Signs and Symptoms of Overexposure

No known applicable information.

Medical Conditions Aggravated by Exposure



B-6




The above listed potential effects of overexposure are based on actual data, results of studies performed upon similar compositions, component data and/or expert review of the product. Please refer to Section 11 for the detailed toxicology information.

3. COMPOSITION/INFORMATION ON INGREDIENTS

None present. This is not a hazardous material as defined in the OSHA Hazard Communication Standard.

4. FIRST AID MEASURES

Eye: If irritation occurs, flush eye(s) with lukewarm gently flowing water for 5 minutes. Obtain medical attention.

Skin: No health effects expected. If irritation does occur flush with lukewarm, gently flowing water for 5 minutes. If irritation persists, obtain medical advice.

Inhalation: If symptoms are experienced remove source of contamination or move victim to fresh air. If irritation persists, obtain medical advice.

Oral: If irritation or discomfort occur, obtain medical advice.

Notes to Physician: Treat according to person's condition and specifics of exposure.

5. FIRE FIGHTING MEASURES

Flash Point: > 214 °F / > 101.1 °C (Closed Cup)

Autoignition Temperature: Not determined.

Flammability Limits in Air: Not determined.

Extinguishing Media: On large fires use dry chemical, foam or water spray. On small fires use carbon dioxide (CO2), dry chemical or water spray. Water can be used to cool fire exposed containers.

Fire Fighting Measures: Self-contained breathing apparatus and protective clothing should be worn in fighting large fires involving chemicals. Determine the need to evacuate or isolate the area according to your local emergency plan. Use water spray to keep fire exposed containers cool.

Unusual Fire Hazards: None.

6. ACCIDENTAL RELEASE MEASURES


B-7




Containment/Clean up: Observe all personal protection equipment recommendations described in Sections 5 and 8. Wipe up or scrape up and contain for salvage or disposal. Clean area as appropriate since spilled materials, even in small quantities, may present a slip hazard. Final cleaning may require use of steam, solvents or detergents. Dispose of saturated absorbant or cleaning materials appropriately, since spontaneous heating may occur. Local, state and federal laws and regulations may apply to releases and disposal of this material, as well as those materials and items employed in the cleanup of releases. You will need to determine which federal, state and local laws and regulations are applicable. Sections 13 and 15 of this MSDS provide information regarding certain federal and state requirements.

Note: See Section 8 for Personal Protective Equipment for Spills. Call (989) 496-5900, if additional information is required.

7. HANDLING AND STORAGE

Use with adequate ventilation. Avoid eye contact.

Use reasonable care and store away from oxidizing materials. This material in its finely divided form presents an explosion hazard. Follow NFPA 654 (for chemical dusts) or 484 (for metal dusts) as appropriate for managing dust hazards to minimize secondary explosion potential.

8. EXPOSURE CONTROLS / PERSONAL PROTECTION

Component Exposure Limits

There are no components with workplace exposure limits.

Engineering Controls

Local Ventilation: None should be needed. General Ventilation: Recommended.

Personal Protective Equipment for Routine Handling

Eyes: Use proper protection - safety glasses as a minimum.

Skin: Washing at mealtime and end of shift is adequate.

Suitable Gloves: Handle in accordance with good industrial hygiene and safety practices.

Inhalation: No respiratory protection should be needed.

Suitable Respirator: None should be needed.

Personal Protective Equipment for Spills


B-8




Eyes: Use proper protection - safety glasses as a minimum.

Skin: Washing at mealtime and end of shift is adequate.

Inhalation/Suitable Respirator:

No respiratory protection should be needed.

Precautionary Measures: Avoid eye contact. Use reasonable care.

Note: These precautions are for room temperature handling. Use at elevated temperature or aerosol/spray applications may requireadded precautions.

9. PHYSICAL AND CHEMICAL PROPERTIES

Physical Form: Grease Color: Translucent white Odor: Odorless

Specific Gravity @ 25°C: 1.1 Viscosity: Not determined.

Freezing/Melting Point: Not determined. Boiling Point: Not determined.

Vapor Pressure @ 25°C: Not determined. Vapor Density: Not determined.

Solubility in Water: Not determined. pH: Not determined.

Volatile Content: Not determined. Flash Point: > 214 °F / > 101.1 °C (Closed Cup)

Autoignition Temperature: Not determined. Flammability Limits in Air: Not determined.

Note: The above information is not intended for use in preparing product specifications. Contact Dow Corning before writing specifications.

10. STABILITY AND REACTIVITY

Chemical Stability: Stable.

Hazardous Polymerization:

Hazardous polymerization will not occur.

Conditions to Avoid: None.

Materials to Avoid: Oxidizing material can cause a reaction.

Hazardous Decomposition Products

Thermal breakdown of this product during fire or very high heat conditions may evolve the following decomposition products: Carbon oxides and traces of incompletely burned carbon compounds. Silicon dioxide. Formaldehyde.


B-9




11. TOXICOLOGICAL INFORMATION

Special Hazard Information on Components


12. ECOLOGICAL INFORMATION

Environmental Fate and Distribution

Complete information is not yet available.

Environmental Effects


Fate and Effects in Waste Water Treatment Plants


Ecotoxicity Classification Criteria Hazard Parameters (LC50 or EC50) High Medium Low Acute Aquatic Toxicity (mg/L) 1 and 100 Acute Terrestrial Toxicity 100 and 2000 This table is adapted from "Environmental Toxicology and Risk Assessment", ASTM STP 1179, p.34, 1993.

This table can be used to classify the ecotoxicity of this product when ecotoxicity data is listed above. Please read the other information presented in the section concerning the overall ecological safety of this material.

13. DISPOSAL CONSIDERATIONS

RCRA Hazard Class (40 CFR 261)

When a decision is made to discard this material, as received, is it classified as a hazardous waste? No

State or local laws may impose additional regulatory requirements regarding disposal. Call (989) 496-6315, if additional information is required.

14. TRANSPORT INFORMATION

DOT Road Shipment Information (49 CFR 172.101)

Not subject to DOT.

Ocean Shipment (IMDG)


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Not subject to IMDG code.

Air Shipment (IATA)

Not subject to IATA regulations.

Call Dow Corning Transportation, (989) 496-8577, if additional information is required.

15. REGULATORY INFORMATION

Contents of this MSDS comply with the OSHA Hazard Communication Standard 29 CFR 1910.1200.

TSCA Status: All chemical substances in this material are included on or exempted from listing on the TSCA Inventory of Chemical Substances.

EPA SARA Title III Chemical Listings

Section 302 Extremely Hazardous Substances (40 CFR 355): None.

Section 304 CERCLA Hazardous Substances (40 CFR 302): None.

Section 311/312 Hazard Class (40 CFR 370): Acute: No

Chronic: No Fire: No

Pressure: No Reactive: No

Section 313 Toxic Chemicals (40 CFR 372): None present or none present in regulated quantities.

Note: Chemicals are listed under the 313 Toxic Chemicals section only if they meet or exceed a reporting threshold.

Supplemental State Compliance Information

California

Warning: This product contains the following chemical(s) listed by the State of California under the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65) as being known to cause cancer, birth defects or other reproductive harm.

None known.

Massachusetts


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CAS Number Wt % Component Name

7631-86-9 7.0 - 13.0 Silicon dioxide

New Jersey


63148-62-9 70.0 - 90.0 Polydimethylsiloxane

7631-86-9 7.0 - 13.0 Silicon dioxide

70131-67-8 5.0 - 10.0 Dimethyl siloxane, hydroxy-terminated

Pennsylvania


63148-62-9 70.0 - 90.0 Polydimethylsiloxane

7631-86-9 7.0 - 13.0 Silicon dioxide

70131-67-8 5.0 - 10.0 Dimethyl siloxane, hydroxy-terminated

16. OTHER INFORMATION

Prepared by: Dow Corning Corporation

These data are offered in good faith as typical values and not as product specifications. No warranty, either expressed or implied, is hereby made. The recommended industrial hygiene and safe handling procedures are believed to be generally applicable. However, each user should review these recommendations in the specific context of the intended use and determine whether they are appropriate.

(R) indicates Registered Trademark


B-12

Compliance Statements

Hazm

at Ta

ble

Hazmat Table AQ 700 60-0602-001 Rev.

Name and amount of Hazardous Substances or Elements in the product

Component Name

Hazardous Substances or Elements

(Pb) (Hg) (Cd) (Cr(VI)) (PBB) (PBDE)

Circuit Boards X O O O O O

WiringX O O O O X

Internal Cables X O O O O X

DC Motor X O O O O X

Name and amount of Hazardous Substances or Elements in

the product

O: ST/

O: Represent the concentration of the hazardous substance in this component’s any homogeneous pieces is

lower than the ST/ standard limitation.

X ST/

( “X” )

X: Represent the concentration of the hazardous substance in this component’s at least one homogeneous

piece is higher than the ST/ standard limitation.

(Manufacturer may give technical reasons to the “X”marks)

The Environmentally Friendly Use Period (EFUP) was determined through experience.

(207 2007 )

A B

The date of Manufacture is in code within the serial number. The first two numbers are the month of

manufacture followed by two numbers for the year. (13 is 2013) followed by a sequence number.

Warranty

War

rant

y

Teledyne Isco Two Year Limited Factory Service Warranty*Factory Service for Teledyne Isco AQ702 and AQ703

This warranty exclusively covers Teledyne Isco multi-

parameter probes, providing a two-year limited warranty

covering parts and labor.

Any probe that fails during the warranty period due to

faulty parts or workmanship will be repaired at the factory

at no charge to the customer. Teledyne Isco’s exclusive

liability is limited to repair or replacement of defective

probes. Teledyne Isco is not liable for consequential

damages.

Teledyne Isco will pay surface transportation charges both

ways within the 48 contiguous United States if the probe

proves to be defective within 30 days of shipment.

Throughout the remainder of the warranty period, the

customer will pay to return the probe to Teledyne Isco, and

Teledyne Isco will pay surface transportation to return the

repaired probe to the customer. Teledyne Isco will not

pay air freight or customer’s packing and crating charges.

This warranty does not cover loss, damage, or defects

resulting from transportation between the customer’s

facility and the repair facility.

The warranty for any probe is the one in effect on date of

shipment. The warranty period begins on the shipping

date, unless Teledyne Isco agrees in writing to a different

date.

Excluded from this warranty are normal wear; expendable

items such as batteries and pH electrodes; and damage due

to corrosion, misuse, accident, or lack of proper

maintenance. This warranty does not cover products not

sold under the Teledyne Isco trademark or for which any

other warranty is specifically stated.

No item may be returned for warranty service without a

return authorization number issued by Teledyne Isco.

This warranty is expressly in lieu of all other warranties

and obligations and Teledyne Isco specifically disclaims

any warranty of merchantability or fitness for a

particular purpose.

The warrantor is Teledyne Isco, 4700 Superior, Lincoln, NE

68504, U.S.A.

* This warranty applies to the USA and countries where Teledyne Isco does not have an authorized dealer.

Customers in countries outside the USA, where Teledyne Isco has an authorized dealer, should contact their

Teledyne Isco dealer for warranty service.

Before returning any probe for repair, please call, fax, or e-mail the Teledyne Isco Service Department for instructions. Many problems can often be diagnosed and corrected over the phone, or by e-mail, without returning the probe to the factory. Probes needing factory repair should be packed carefully, and shipped to the attention of the service department. Small, non-fragile items can be sent by insured parcel post. PLEASE BE SURE TO ENCLOSE A NOTE EXPLAINING THE PROBLEM.

Shipping Address: Teledyne Isco - Attention Repair Service4700 Superior StreetLincoln, NE 68504 USA

Mailing Address: Teledyne Isco PO Box 82531Lincoln, NE 68501 USA

Phone: Repair service: (866) 298-6174Sales & General Information: (800) 228-4373 (USA & Canada)

Fax: (402) 465-3001Email: [email protected]

May 2013

ForewordSafetyTable of ContentsSection 1 Introduction1.1 Overview1.2 Connecting to Teledyne Isco Devices1.3 Parameters and Units of Measure1.3.1 Current Draw Considerations

1.4 System Components1.4.1 Unpacking Instructions

1.5 Status Indicator Lights1.6 Technical Specifications1.7 Installation

Section 2 Software2.1 Installing the Software2.2 Connecting the AQ700 to a Computer2.2.1 Disconnecting the AQ700 from a Computer

2.3 Program Screens2.4 Main Screen2.4.1 Hot Buttons

2.5 PC Pull Down Menu2.5.1 Set Scroll Interval2.5.2 Set Snapshot Location2.5.3 Automatic Snapshot2.5.4 Graphing2.5.5 Software Version

2.6 AQ700 Sonde Pull Down Menu2.6.1 Calibration Log2.6.2 Sensors and Parameters List2.6.3 Calibrate2.6.4 AQ700 Version

Section 3 Sensors and Calibration3.1 Overview3.1.1 When to Calibrate3.1.2 General Calibration Procedures3.1.3 Sensor Response Factor (SRF)

3.2 Calibration Log3.3 Sensor and Parameter List3.4 Sensor Descriptions and Specific Calibrations3.4.1 AQ700 Time and Date3.4.2 Set Barometric Pressure (BP)3.4.3 Temperature Sensor3.4.4 Dissolved Oxygen (DO) Sensor3.4.5 DO: Calibration3.4.6 DO: Zero-DO Verification3.4.7 Conductivity Sensor3.4.8 Conductivity: Calibration3.4.9 pH Sensor3.4.10 pH: Calibration3.4.11 Oxidation-Reduction Potential (ORP) Sensor3.4.12 ORP: Calibration3.4.13 Depth Sensor3.4.14 Depth: Calibration3.4.15 Turbidity Sensor3.4.16 Turbidity: Calibration

Section 4 Maintenance, Troubleshooting, and Servicing4.1 Routine Cleaning4.2 O-Ring Lubrication4.3 pH & ORP: Reference Electrode4.4 DO Sensor Tip4.5 Turbidity Sensor: Wiper

Appendix A Parts and AccessoriesA.1 How to OrderA.2 Equipment and AccessoriesA.3 Replacement PartsA.4 Repair Parts

Appendix B Material Safety Data SheetsB.1 Overview

Compliance StatementsWarranty

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