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Transcript of LC MS Nitrogen Generator
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Directions for Use
Document No. 031972
Revision 01
October 2003
LC/MS NitrogenGenerator
MSQ10LA
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MSQ10LA Nitrogen Generator
Instructions for Use
MSQ10LA issue 1 1
2003 by Dionex CorporationAll rights reserved worldwide.
Printed in the United States of America.
This publication is protected by federal copyright law. No part of this publication may be
copied or distributed, transmitted, transcribed, stored in a retrieval system, or transmitted into
any human or computer language, in any form or by any means, electronic, mechanical,
magnetic, manual, or otherwise, or disclosed to third parties without the express written
permission of Dionex Corporation, 1228 Titan Way, Sunnyvale, California 94088-3603
U.S.A.
The MSQ10LA Nitrogen Generator is manufactured for Dionex by:
Peak Scientific Instruments
Fountain Crescent
Inchinnan Business Park
Inchinnan, Renfrewshire
PA4 9RE
Scotland, UK
DISCLAIMER OF WARRANTY AND LIMITED WARRANTY
THIS PUBLICATION IS PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND.
DIONEX CORPORATION DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
EXPRESS OR IMPLIED REPRESENTATIONS REGARDING THE USE, OR THE RESULTS
OF THE USE, OF THIS PUBLICATION IN TERMS OF CORRECTNESS, ACCURACY,
RELIABILITY, CURRENTNESS, OR OTHERWISE. FURTHER, DIONEX CORPORATION
RESERVES THE RIGHT TO REVISE THIS PUBLICATION AND TO MAKE CHANGES
FROM TIME TO TIME IN THE CONTENT HEREINOF WITHOUT OBLIGATION OF
DIONEX CORPORATION TO NOTIFY ANY PERSON OR ORGANIZATION OF SUCH
REVISION OR CHANGES.
TRADEMARKS
Molex is a registered trademark of Molex, Inc.
Swagelok is a registered trademark of Swagelok Co.
PRINTING HISTORY
Revision 01, October 2003
The products of Dionex Corporation are produced under ISO 9001 accredited quality management systems.
Published by Technical Publications, Dionex Corporation, Sunnyvale, CA 94086.
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MSQ10LA Nitrogen Generator
Instructions for Use
MSQ10LA issue 1 2
CONTENTS
1 INTRODUCTION........................................................... ........................................................... ............... 3
2 UNPACKING AND INSTALLATION............................. ................................................................ ...... 3
3 ELECTRICAL CONNECTION.................................. ................................................................ ............ 3
4 AIR CONNECTION............................... ........................................................... ....................................... 4
5 PRINCIPLE OF OPERATION................................................................ ............................................... 4
6 COMMISSIONING...................................................... ........................................................... ................. 5
7 ROUTINE INSPECTION .............................................................. .......................................................... 6
8 TROUBLESHOOTING .......................................................... ............................................................ ..... 8
9 TECHNICAL SPECIFICATIONS ............................................................ ........................................... 10
10 PARTS LIST ...................................................... ............................................................... ...................... 11
MAINTENANCE RECORD LOG .......................................................... ....................................................... 14
IMPORTANT NOTICE TO USERS
These instructions must be read thoroughly and understood before installation andoperation of your LC/MS Nitrogen Generator. Please follow the appropriate safetystandards for handling gases as determined by the laws and regulations of yourcountry.
Please save the product packaging for storage or future shipment of the generator.
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MSQ10LA Nitrogen Generator
Instructions for Use
MSQ10LA issue 1 3
1 Introduction
The MSQ10LA is a self-contained nitrogen generator designed specifically for use with Liquid
Chromatography/Mass Spectrometry (LC/MS) analytical instruments as a source of carrier gas. The generator
has been designed to operate totally independent of an external air supply and only requires an electrical
supply to deliver high volume, high pressure, clean, dry, pure nitrogen.
2 Unpacking and Installation
Although every precaution has been taken for safe transit and packaging, it is advisable to fully inspect the
unit for any sign of transit damage.
ANY DAMAGE SHOULD BE REPORTED IMMEDIATELY TO THE CARRIER AND DIONEX.
After unpacking and a visual inspection, the unit should be placed in a ventilated area away from direct
sunlight. Care should be taken not to obstruct the ventilation holes on the sides of the unit or the fan outlet
at the rear.
The generator should be placed on a steady and level base. It has been designed to fit under most
workbenches. Alternatively, the unit may be placed on the workbench adjacent to the machine or in any
location convenient to the user. A guide for installation is included at the end of the document.
Performance of the generator (as with any sophisticated equipment) is affected by ambient temperature.Continuous operation in ambient temperatures exceeding 25C will lead to a reduction in capacity and
prolonged operation in temperatures exceeding 35C will shorten the life of the unit. Note should also be
taken of the proximity of air conditioning outlets. These can sometimes give rise to pockets of air with
high relative humidity. Operation of the generator within such a pocket could adversely affect its
performance.
3 Electrical Connection
Important Electrical Notice
This unit is classified asSAFETY CLASS 1
equipment.THIS UNIT MUST BE EARTHED
. Before
connecting the unit to the mains supply, please check the information on the serial plate. The mains
supply must be of the stated AC voltage and frequency.
EARTH/GROUND (E): Green & YellowLIVE (L): BrownNeutral (N): Blue
FuseThe generator protection fuse is in the pull-out drawer of the mains inlet IEC Euroconnector located on the
bottom right-hand side of the cabinet, adjacent to the off/on switch. The fuse is rated at 230V 10%
(50/60Hz ac). The drawer also holds a spare.
Connect the generator to a single-phase supply using the power cord provided, or the power cord
supplied with the equipment from Dionex for the country of use.
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MSQ10LA Nitrogen Generator
Instructions for Use
MSQ10LA issue 1 4
4 Air Connection
The MSQ10LA generator has its own built-in air compressor and therefore does not require an external
compressed air source.
The generator has one bulkhead connection to the rear of the unit. This is supplied with a 6mm push-in
fitting. This is the nitrogen outlet fitting and should be coupled to the application. There is no drain on this
machine. Any moisture liberated by the filter-separator is discharged through the high capacity exhaust
system, where the sudden reduction in pressure causes instant evaporation. The water vapor is safely
removed from the unit by the ventilation system.
5 Principle of OperationThe MSQ10LA Nitrogen Generator utilizes a pressure swing adsorption (PSA) method to extract pure
nitrogen from air. This is where unwanted gases can be selectively adsorbed from compressed air into a
porous carbon molecular sieve material (CMS). Dionex instruments utilize a unique single-column system
where the column is alternately pressurized and vented under a finely tuned timing cycle. The rates of
pressurization and venting are accurately set, which guarantees higher purity than can be achieved with a
similarly sized traditional 2-column system.
10
14
Nitrogen Generator
Standard System
Parts List
1. Compressor
14. Bulkhead Connection
15. Internal Gauge Rail
9. Nitrogen Storage Tank
10. Pressure Regulator
11. Internal Pressure Gauge
13. Front Panel Gauge
8.
7.
15.
12
116.
9.
13
2. 3.
7. CMS Column
8. Non-return Valve
2. Cooling Coil
4. Filter / Separator
5. Exhaust Valve
6. Exhaust Silencer
3. Cooling Fan (if fitted)
16. 16.
16. Compressor Cooling Fan (if fitted)
1.
5. 4.
12. Flow Regulator
Air is drawn into the system by the compressor (1) and passed via the cooling coil (3) andthe filter/separator (4) into the CMS column (7). Oxygen molecules in the air are trapped bythe sieve. However, the molecules of nitrogen pass straight through and are collected in the
nitrogen storage tank (9). After a time interval, the compressor is stopped and the exhaustvalve (5) opens, allowing the sieve column to vent to atmosphere. The trapped oxygen isliberated and escapes to atmosphere via the exhaust valve (5) and the silencer (6). Thegenerated nitrogen in the storage tank is then regulated to the correct pressure and flow
rate. After another time interval, the exhaust valve shuts and the compressor starts. Thiscycle runs continuously.
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MSQ10LA Nitrogen Generator
Instructions for Use
MSQ10LA issue 1 5
6 Commissioning
With the generator installed as described earlier, connect power to the unit and turn it on. Disconnect the
nitrogen outlet connection to allow the generator to vent to atmosphere until the unit is stabilized. At
Switch On, the exhaust valve will open and the generator will commence its Venting Cycle. This is to allow
venting of any residual pressure in order that the compressor does not start against pressure. The Vent
Cycle may last up to 90 seconds. At the end of the vent cycle, the compressor should be heard to run
and the normal operating cycle will begin. Pressure should begin to build, and the gauge on the front
panel should indicate 75 psig after approximately 10 minutes.
The generator has been pre-set at the factory to give 10 liters ATP per minute at 85 psig. Once the
pressure in the nitrogen receiver exceeds that setting, the generator will stabilize and produce purenitrogen. Maximum purity will be achieved after around 45 minutes. At this time, the generator can be re-
connected to the application.
The generator is designed to deliver up to 10 liters of nitrogen at 85 psig with an oxygen content of 2% or
less. Should the demand for nitrogen be less than 10 liters, or should the demand stop, the generator will
continue to operate without any problems. The generator is protected from over-pressure and its normal
operating cycle ensures frequent venting.
Timer Setting
The cycle timer has been set at the factory and should not require further adjustment. Adjusting the timer
will affect the volume and purity of the delivered nitrogen; therefore, the timer should NEVER be adjusted
without reference to the factory. The normal settings for this generator are 175 seconds ON, 85 seconds
OFF. These settings may vary slightly between machines.
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MSQ10LA Nitrogen Generator
Instructions for Use
MSQ10LA issue 1 6
7 RoutineInspection
Due to the simplicity of the design and the small number of moving parts, the MSQ10LA Nitrogen
Generator will have a long and trouble-free life. However, as with all scientific and technical equipment,
the generator should be regularly inspected by a competent person and the following points noted.
Every 12 Months
Note: All routine maintenance filter elements are contained in Dionex P/N 061492.
Compressor Inlet Filter Element
1. Switch the generatorOFFand disconnect it from the electrical supply. Remove the fuse fromthe Euro-socket to prevent the generator being inadvertently switched on by another person.
2. Remove the 5-off X-head screws securing the lower front panel. Remove the panel to expose
the compressor.
3. The filter is located on top of the compressor and faces toward the rear, as shown below.
The cover is removed by twisting it one-
quarter turn and pulling clear. The elementsimply lifts out.
Part Number 02-4187
Reassembly is the reverse procedure.
Inlet Filter
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MSQ10LA Nitrogen Generator
Instructions for Use
MSQ10LA issue 1 7
Coalescing Filter and Exhaust Silencer
1. Switch the generatorOFFand disconnect it from the electrical supply. Remove the fuse from
the Euro-socket to prevent the generator being inadvertently switched on by another person.
2. Pull the generator clear of the bench (if located under) to a place where access is possible to
all four sides.
3. Remove the 8-off X-Head screws securing the lid. Remove the lid.
4. Remove the coalescing filter bowl shown below by holding down the black slide and twisting
the bowl one-quarter turn. The element simply unscrews.
1. Fit new element and clean, and re-fit bowl.
2. Unscrew and remove the green plastic cover of the exhaust silencer. Remove the 10mm nut
and prize off the element.
1. Fit new element and re-fit plastic cover.
2. Replace all covers and switch on. Allow 4 hours to recover purity before reconnecting toapplication.
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MSQ10LA Nitrogen Generator
Instructions for Use
MSQ10LA issue 1 8
8 Troubleshooting
The PSA method for nitrogen production is the most reliable of the popular methods. Many thousands of
PSA systems are currently operating worldwide and have given many years of trouble-free operation.
Provided the CMS material is protected from oils and oxygen enrichment, the purity of the nitrogen
produced will remain consistent over the lifetime of the machine.
Problems associated with the generator will be confined to the compressed air or control systems and will
probably show up through loss of capacity. Reference should be made to the following Fault Finding
Chart.
Insuficient
N2 Flow
Compressor
Cycling On/Off
Sieve Vents on
Exhuast Cycle
Check Timer
Operating
Check Timer
OperationFit New Timer
Yes
No
Ok
Yes
No
Ok
Not
Running
Check PowerRepair Wiring
Fault
Ok
No Power
Check Power out
to Solenoid ValveNo
Yes
Check Exhaust
Valve
Replace Faulty
Valve
Check
Compressor Inlet
Filter
clean
Dirty
Fit New Filter
Check Pressure
@ Filter Bowl
Check System
for Leaks Repair Leaks
Check Gauge
Rail PressureAdjust Pressure
< 100 psi
>110 psiNo
Yes
Service
Compressor
>100 psi
< 100 psi
Check Timer
Settings
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MSQ10LA Nitrogen Generator
Instructions for Use
MSQ10LA issue 1 9
Compressor Requirements
The intake filter requires periodic replacement. Initial inspection should be after 500 hours operation.
Most compressor-related problems can be prevented by keeping the filter clean. A dirty inlet filter will
decrease compressor performance and may shorten its life.
The compressor head surfaces and motor casing become very HOT during operation. Do not
touch these parts until the unit has been switched off and allowed to cool.
Switch the generator OFFand disconnect it from the electrical supply. Remove the fuse from the
Euro-socket to prevent the generator being inadvertently switched on by another person.
This is a non-lubricated compressor and should never be oiled. Oiling this compressor will cause
damage.
Compressor Replacement
Remove the generator to a clean dry place with sufficient room to work.
1. Remove the lower front panel.
2. Disconnect the braided hose from cone fitting where it is secured to the right-hand side panel.Take care not to disturb the fit between the cone fitting and the bracket assembly.
3. Disconnect the Molexconnector at the front of the compressor.
4. Tip the generator onto its back and remove the 4-off nuts securing the compressor to thebase. Support the weight of the compressor with one hand while removing the last nut.
5. Lift the compressor clear of the generator.
6. Remove and clean all the fittings from the old compressor and reassemble onto the newmachine using PTEF tape and sealing compound. (Swagelok Teflon Free Pt No MS-TFS-
50) is recommended.)
Reassembly is the reverse procedure.
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MSQ10LA Nitrogen Generator
Instructions for Use
MSQ10LA issue 1 10
9 Technical Specifications
General Details
Minimum Operating Ambient Temperature 5oC (41
oF)
Maximum Operating Ambient Temperature 30oC (86
oF)
Inlet Conditions(Free of oil and bulk moisture)
Minimum Air Inlet Pressure N/A
Maximum Air Inlet Pressure N/A
Minimum Air Inlet Flow Rate N/A
Outlet Gas
Maximum Pressure Drop (Outlet-Inlet) P N/A
Maximum Gas Outlet Pressure 85 psig
Maximum Gas Outlet Flow for Specified Purity 10 Liters/min (ATP)
Pressure Dew point -75oC (-103
oF) (1.4ppm @ ATP)
Start up time for Purity 45 minutesParticles 0.01um
O2 level (maximum) 2.0%
Electrical Requirements
@230V ac 10% (50/60Hz ac) 4.2 Amps
Fuse (220V 50/60Hz ac) 10 Amps
Electrical Connection IEC Euroconnector
Plug Type NEMA Code N6/15
General
Dimensions H x W x D cm
(inches)
63 x 43 x 41
(24.6 x 17 x 16)
Weight Kg
(lbs)
47.5
(104.5)
Shipping Weight Kg
(lbs)
69
(152)
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MSQ10LA Nitrogen Generator
Instructions for Use
MSQ10LA issue 1 11
10 Parts List
Recommended Spares
MSQ10LA Service Spares
The following parts are in Dionex P/N 061492
Item Description Interval Part No. No. Off
1 Compressor Inlet Filter Element 12 Months 02-4187 1
2 Coalescing Filter Element 12 Months 02-4509 1
3 Exhaust Element 12 Months 02-4336 1
MSQ10LA Maintenance Spares
Item Description Part No. No. Off
1 Braided Hose 02-1100 1
2 Internal Gauge 02-1021 1
3 Exhaust Valve 02-4289 1
4 Non-Return Valve 02-1135 1
5 Timer 04-1019 1
6 Contactor 04-4439 1
7 Cooling / Ventilation Fan 04-1021 2
8 Flow Controller 02-4209 1
9 Pressure Regulator 02-1110 1
10 Panel Gauge 02-1020 2
11 Safety Valve 02-4544 112 Compressor Anti-vibe Mounts 06-1020 4
13 Compressor 06-5513 1
14 Back Pressure Relief Valve 02-1213 1
Additional parts can be ordered from:
Peak Scientific InstrumentsFountain CrescentInchinnan Business Park
Inchinnan, RenfrewshirePA4 9REScotland, UK
Contact information:
+44-141-812-8100+44-141-812-8200 fax
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MSQ10LA Nitrogen Generator
Instructions for Use
MSQ10LA issue 1 12
14
15.
10 11
12
16.
1.
9.
6. 5.
13
7.
8.
11. Internal Pressure Gauge
Nitrogen GeneratorStandard System
14. Bulkhead Connection
15. Internal Gauge Rail
13. Front Panel Gauge
16. Compressor Cooling Fan (if fitted)
12. Flow Regulator
16.
4.
Parts List
1. Compressor
9. Nitrogen Storage Tank
10. Pressure Regulator
7. CMS Column
8. Non-return Valve
2. Cooling Coil
4. Filter / Separator
5. Exhaust Valve
6. Exhaust Silencer
3. Cooling Fan (if fitted)
2. 3.
NL ESwitch
Fuse
Fan Motor s
MSQ10LA Electrical Dia ram
Terminal Rail
Com ressor
Timer
Valve
Exhaust
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MSQ10LA Nitrogen Generator
Instructions for Use
MSQ10LA issue 1 13
80.00 mm
800 mm
PowerOutletPosition
(MaximumD
istanceLHS)
PowerOutletPosition
(MaximumD
istanceRHS)
RearVentilationGap
Clearan
ceforMaintenance
875 mm
900 mm
Notes
1.Accessisrequiredthrough
FrontPanels&Lidfor
maintenance.
2.PlugPowerCordintoacon
venientoutletwithsufficient
slacktoallow
theunittobe
pulledforwarforaccess.
3.Allow
sufficientslackinthe
GasLinetoallow
the
generatortobepulledforwardformaintenance
MSQ10LA
InstallationNotes
NitrogenPressure
110 mm
625 mm
IO
410 mm
GaprequiredforPowerCord
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MSQ10LA Nitrogen Generator
Instructions for Use
11 Maintenance Record Log
Model- MSQ10LA Serial Number:
WorkDone
Remarks Date Name