AquaMetrix LL3, LL4, LL7 and LL7H Liquid Level Controllers · LL3 Single Level Service Refer to LL4...
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www.Aquametrix.com 978-749-9949 Toll free - 855-747-7623 (855-pHProbe) Features • Ideal for applications where the controller is mounted remotely, up to 300’ from the electrodes • Built-in sensitivity adjustment for foam or liquid applications • Safe Low voltage at the elec- trodes • Custom electrode length and material available • Model LL7H for use with low conductivity liquids Description 100 School Street Andover, MA 01810 978-749-9949 855-747-7623 www.WaterAnalytics.net Applications • Waste water flow accumula- tion • Water Treatment systems • Irrigation • Chemical Mixing • Process cooling systems • Neutralizaton Systems • Process flow control • Filtration systems LL3, LL4, LL7 and LL7H Liquid Level Controllers Water Analytics manufactures four models of liquid level controllers to sat- isfy most industrial applications. These controllers operate on the principle of electrolytic conductivity in liquids. A built- in sensitivity adjustment permits field tun- ing the instrument so that one model is suitable for most conductivity liquids. For instance the LL4 or LL7 may be adjusted to respond to either foam or liquid. Some controllers may be as far as 300 meters from the electrodes, and connections are made with unshielded cable. The AquaMetrix design limits the voltage at the electrodes to 18 volts, and also limits the current even if electrodes are shorted. Some competitive controllers may require as much as 500 volts across the electrodes. MODEL LL4 This model has one relay for a pump with normally open or normally closed operation. MODEL LL7 and LL7H These units have the added feature of an auxiliary pair of normally open contacts for use with an annunciator or other device. The LL7 version is suitable for most in- dustrial applications. The LL7H has much greater sensitivity and is specifically de- signed for use with low conductivity liquids. MODEL LL3 This model is the most versatile of the four LL Series controllers. It contains two relays, for pump and auxillary use, each with normal open or normal closed operation. An indicator LED light in the unit can be used for very accurate sensitivity adjustments. All LL Series controllers are suitable for single level service or differential service. Single level service allows for high or low alarm, while differential service provides a pump up/pump down region between two electrode heights. All units are housed in a NEMA 1 black ABS plastic enclosure which plugs in to a standard 12-pin relay socket with durable screw terminals. The pins and terminals are nickel plated brass. by Water Analytics Aqua Metrix by Water Analytics Aqua Metrix
Transcript of AquaMetrix LL3, LL4, LL7 and LL7H Liquid Level Controllers · LL3 Single Level Service Refer to LL4...
www.Aquametrix.com 978-749-9949 Toll free - 855-747-7623 (855-pHProbe)
Features
• Ideal for applications where the controller is mounted remotely, up to 300’ from the electrodes
• Built-in sensitivity adjustment for foam or liquid applications
• Safe Low voltage at the elec-trodes
• Custom electrode length and material available
• Model LL7H for use with low conductivity liquids
Description
100 School StreetAndover, MA 01810
978-749-9949855-747-7623
www.WaterAnalytics.net
Applications
• Waste water flow accumula-tion
• Water Treatment systems• Irrigation• Chemical Mixing• Process cooling systems• Neutralizaton Systems• Process flow control• Filtration systems
LL3, LL4, LL7 and LL7HLiquid Level Controllers
Water Analytics manufactures four models of liquid level controllers to sat-isfy most industrial applications. These controllers operate on the principle of electrolytic conductivity in liquids. A built-in sensitivity adjustment permits field tun-ing the instrument so that one model is suitable for most conductivity liquids. For instance the LL4 or LL7 may be adjusted to respond to either foam or liquid. Some controllers may be as far as 300 meters from the electrodes, and connections are made with unshielded cable.The AquaMetrix design limits the voltage at the electrodes to 18 volts, and also limits the current even if electrodes are shorted. Some competitive controllers may require as much as 500 volts across the electrodes.
MODEL LL4This model has one relay for a pump with normally open or normally closed operation.
MODEL LL7 and LL7H These units have the added feature of an auxiliary pair of normally open contacts for use with an annunciator or other device. The LL7 version is suitable for most in-dustrial applications. The LL7H has much greater sensitivity and is specifically de-signed for use with low conductivity liquids.MODEL LL3This model is the most versatile of the four LL Series controllers. It contains two relays, for pump and auxillary use, each with normal open or normal closed operation. An indicator LED light in the unit can be used for very accurate sensitivity adjustments.All LL Series controllers are suitable for single level service or differential service. Single level service allows for high or low alarm, while differential service provides a pump up/pump down region between two electrode heights. All units are housed in a NEMA 1 black ABS plastic enclosure which plugs in to a standard 12-pin relay socket with durable screw terminals. The pins and terminals are nickel plated brass.
byWater Analytics
AquaMetrix
byWater Analytics
AquaMetrix
www.Aquametrix.com 978-749-9949 Toll free - 855-747-7623 (855-pHProbe)
Specifications and Ordering Information
Model LL3 Model LL4 Model LL7 Model LL7HPower Supply 120 or 240 VAC depending on modelStandard Housing Plug-In Encapsulated Black ABS Enclosure, 12-pin Relay SocketContacts DPDT Form C 10A resistive 120 Vac 1/3 HPPump Terminals Normal Open and Normal Closed
Auxilliary Terminals Normal Open and Normal Closed None Normal Open Normal Open
Max. Conn. Length 300 feetSensing Circuit Re-sistance 10 kΩ maximum 1 MΩ maximum
Fully Encapsulated YesOperating Temp -17.8 degree C to 55 degree CHumidity Up to 85% RHPressure AtmosphericMax Cable Length 300m tested (only on model LL7H)
Dimensions
Controllers
Model LL4, LL7 and LLW Liquid Level Controllers
www.Aquametrix.com 978-749-9949 Toll free - 855-747-7623 (855-pHProbe)
LL4Single Level Service High Alarm or Low Level CutoffAttach electrical ground to terminal 1, attach power to terminals 2 and 3. Attach tank ground or always submersed electrode to terminal 12, and single level electrode to terminal 11. Terminal 10 is not in use. Attach one pump lead to terminal 6, and the other to normally open terminal 5. Terminal 5 will close when liquid reaches level electrode.
Differential Level ServicePump DownAttach electrical ground to terminal 1, attach power to terminals 2 and 3. Attach tank ground or always submersed electrode to terminal 12, short electrode to terminal 11, and long electrode to terminal 10. Attach one pump lead to terminal 6, and the other to normally open terminal 5. If liquid rises above short electrode, terminal 5 will close, and re-open after the liquid falls under the long electrode.
Single Level Service Low Alarm or High Level CutoffAttach electrical ground to terminal 1, attach power to terminals 2 and 3. Attach tank ground or always submersed electrode to terminal 12, and single level electrode to terminal 11. Terminal 10 is not in use. Attach one pump lead to terminal 6, and the other to normally closed terminal 4. Terminal 4 will open when liquid reaches level electrode.
Differential Level ServicePump UpAttach electrical ground to terminal 1, attach power to terminals 2 and 3. Attach tank ground or always submersed electrode to terminal 12, short electrode to terminal 11, and long electrode to terminal 10. Attach one pump lead to terminal 6, and the other to normally closed terminal 4. If liquid rises above short electrode, terminal 4 will open, and close again after the liquid falls under the long electrode.
LL7 and LL7HSingle Level Service Refer to LL4 for standard wiring instructions. The LL7 includes the additional feature of an auxilary open contact. Attach one auxillary lead to common terminal 7, and the other lead to normally open terminal 8. Terminal 10 is not in use. When liquid reaches level electrode, terminal 8 will close, and will re-open when liquid again goes below electrode. This may be used for an alarm or annunciator.
LL3Single Level Service Refer to LL4 for standard wiring instructions. The LL3 includes two auxilary contacts, normal open and normal closed. Attach one auxillary lead to common terminal 7. For direct operation, connect second lead to normally open terminal 8. For inverse operation, connect to normally closed terminal 9. When liquid reaches level electrode, auxillary relay will either open or close depending on which terminal is used.
Differential Level ServiceRefer to LL4 for standard wiring instructions. The LL3 includes two auxilary contacts, normal open and normal closed. Attach one auxillary lead to common terminal 7. For direct operation, connect second lead to normally open terminal 8. For inverse operation, connect to normally closed terminal 9. When liquid rises above short electrode or falls below long electrode, auxil-lary relay will either open or close depending on which terminal is used.
Differential Level ServiceRefer to LL4 for standard wiring instructions. The LL7 includes the additional feature of an auxilary open contact. Attach one auxillary lead to common terminal 7, and the other lead to normally open terminal 8. Terminal 9 is not in use. When liquid reaches short electrode, terminal 8 will close, and will re-open when liquid again goes below long electrode. This may be used for an alarm or annunciator.
Connect terminal 12 to tank if metallic and grounded. For ungrounded tank connect an additional electrode, which must always be immersed in liquid, to terminal 12. Single level requires one level electrode plus a tank ground. Differential level requires two elec-trodes for the tank level to remain between.LL7H ONLY; Terminal 10 is used to neutralize capacitance effect of cable. If controller is more then 20 meters from tank use a three conductor cable and connect a one wire to NW and leave unconnected at tank. Do not use the shield for this purpose.
Model LL3, LL4, LL7 and LL7H Operation and Wiring
LEVEL TOLERANCE
GROUND ELECTRODE (OR TANK)
LOWER LEVEL ELECTRODE(PUMP ON, AUX. ON)
UPPER ELECTRODE(PUMP OFF, AUX. OFF)
Single Level Configuration Differential Level Configuration
GROUND ELECTRODE (OR TANK)
LEVEL ELECTRODE
BELOW: PUMP ON, AUX OFFABOVE: PUMP OFF, AUX ON
www.Aquametrix.com 978-749-9949 Toll free - 855-747-7623 (855-pHProbe)
Model LL3, LL4, LL7 and LL7H External Wiring Diagrams
byWater Analytics
AquaMetrix
Accessories and Electrodes
LL3 Plug in Relay Base
LL4 Plug in Relay Base
LL7 Plug in Relay Base
LL7H - Terminal 9 is used for NW, the neutralizing wire.
GROUND120V AC - (+)120V AC - (-)
TANK (OR ELECTRODE)
SHORT ELECTRODE
LONG ELECTRODE
RELAY 1 Must be wired to power terminals or have external power source.
CONTROLLER POWER LEVEL ELECTRODES
RELAY 2Must be wired to power terminals or have external power source.
1
2
3
4
5
6 7
8
9
10
11
12
AUX. NORMALLY CLOSED
AUX. NORMALLY OPEN
AUX. COMMONPUMP COMMON
PUMP NORMALLY OPEN
PUMP NORMALLY CLOSED
GROUND120V AC - (+)120V AC - (-)
TANK (OR ELECTRODE)
SHORT ELECTRODE
LONG ELECTRODE
RELAY 1 Must be wired to power terminals or have external power source.
CONTROLLER POWER LEVEL ELECTRODES
1
2
3
4
5
6 7
8
9
10
11
12
PUMP COMMON
PUMP NORMALLY OPEN
PUMP NORMALLY CLOSED
NOT IN USE
GROUND120V AC - (+)120V AC - (-)
TANK (OR ELECTRODE)
SHORT ELECTRODE
LONG ELECTRODE
RELAY 1 Must be wired to power terminals or have external power source.
CONTROLLER POWER LEVEL ELECTRODES
RELAY 2Must be wired to power terminals or have external power source.
1
2
3
4
5
6 7
8
9
10
11
12
AUX. NORMALLY OPEN
AUX. COMMONPUMP COMMON
PUMP NORMALLY OPEN
PUMP NORMALLY CLOSED
NOT IN USE
AM-LL-CE3 Contacting electrode for LL controllers
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