Omega Speaker Systems Switch LV 1101 User Manual

Users Guide  
®
LV-1101 & LV-1102  
Non-Magnetic Liquid Level Switches  
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TM  
omega.com  
®
OMEGA  
SM  
OMEGAnet On-Line Service  
Internet e-mail  
Servicing North America:  
USA:  
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Stamford, CT 06907-0047  
Tel: (203) 359-1660  
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Laval (Quebec) H7L 5A1  
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For immediate technical or application assistance:  
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FAX: 44 (1455) 283912  
Tel: 44 (161) 777-6611  
FAX: 44 (161) 777-6622  
Toll Free in England: 0800-488-488  
It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that  
apply. OMEGA is constantly pursuing certification of its products to the European New Approach  
Directives. OMEGA will add the CE mark to every appropriate device upon certification.  
The information contained in this document is believed to be correct but OMEGA Engineering, Inc. accepts  
no liability for any errors it contains, and reserves the right to alter specifications without notice.  
WARNING: These products are not designed for use in, and should not be used for, patient connected applications.  
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Unpacking Instructions  
Remove the Packing List and verify that you have received all equipment,  
including the following (quantities in parentheses):  
LV-1101 or LV-1102 level switch (1)  
Operator’s Manual (1)  
If you have any questions about the shipment, please call the OMEGA Customer  
Service Department.  
When you receive the shipment, inspect the container and equipment for signs of  
damage. Note any evidence of rough handling in transit. Immediately report any  
damage to the shipping agent.  
NOTE  
The carrier will not honor damage claims unless all shipping  
material is saved for inspection. After examining and removing  
contents, save packing material and carton in the event reship-  
ment is necessary.  
From the Technical Library of  
i
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General Description  
®
The OMEGA LV-1100 Series Liquid Level Switches feature a non-magnetic  
design suitable for application where magnetic particles (ie: rust) are present.  
The LV-1100 Series also feature rugged metal construction and a buoyancy  
adjustment to allow the unit to be used with fluids down to SP.GR. = .06.  
The LV-1101 features a single float design; the LV-1102 featurs a two float  
design.  
Features  
• Rugged Industrial Design  
• Non-Magnetic Design – Suitable For Rusty Environments  
• 15A SPDT Switch Directly Controls Pump  
• Continuously Adjustable Float Buoyancy Control to Allow Use in Fluids  
With Specific Gravity Down to 0.6  
• For Use With Water, Seawater, Sewage, Slurries, and Oils, Glycols, Soap  
Solutions  
• Model LV-1102 Also For Use With Chlorinated Organics, Medium  
Concentrated Acids and Bases  
NOTE  
The LV-1101 has a Single Float Design; the LV-1102 has a Two  
Float Design  
1
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Specifications  
Working Fluid Specific  
Gravity Range:  
Adjustable between 0.6 and 1.0+  
Nom. Working  
Pressure/Temperature:  
300 PSIG @ 180˚F max.  
Liquid Level Change  
To Activate Switch:  
1
/
4 inch  
Relay Switch:  
SPDT 15A @ 125 or 250 Vac; 10,000,000  
operations median  
Option “D”:  
Dual SPDT relays; nominal difference flow  
between the two relay actuation points is 5%  
Electrical Cable Fitting:  
Wetted Parts:  
Water resistant strain relief for cable diameter  
.250" .025"  
Model LV-1101: red brass body, phosphor  
bronze float shaft, 316 SS screws and washers,  
302 SS float, Buna N seal and cork-chloroprene  
gasket;  
Model LV-1102: 316 SS body, float shaft,  
screws and washers, 302 SS float, Viton seal  
and Teflon gasket  
Size:  
Fits through 2" NPT hole  
3 lbs.  
Weight:  
Installation Dimensions  
2
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Installation  
The LV-1101 Series Level Switches are supplied with a 2" x 1" TT bushing  
threaded in place with 2 to 3 wraps of Teflon tape, which must be intact or  
renewed if bushing and switch are separated before assembly in tank. Apply  
a minimum of 2 to a maximum of 3 wraps of Teflon tape to the male threads  
of the bushing. This is especially important if the unit is to be used in metal  
fittings where coarse threads could bind if not lubricated.  
Thread the unit into the tank and tighten until a good, no leak seal is obtained.  
Make sure that the arrows molded on the body casting and printed on the  
label are pointed vertically downward.  
Remove the cover and test for proper switch action by applying multimeter  
probes to the COM, NO and NC terminals of the microswitch while  
actuating the switch lever arm.  
The unit is supplied with the adjusting spring in the relaxed condition.  
Leave the spring in the relaxed condition and fill the vessel until the float is  
submerged. If the switch is actuated, proceed with the electrical wiring.  
If the specific gravity of the working fluid is too low to lift the float and  
actuate the switch, then the buoyancy adjustment feature must be used. To  
adjust the buoyancy, turn the leadscrew CLOCKWISE until the switch is  
actuated. Lower the liquid level until the float is clear of the liquid and the  
switch is de-actuated. Raise the liquid level again until the float is submerged  
and the switch actuates. If no further spring bias adjustment is required,  
proceed with wiring.  
Electrical Wiring  
1. WIRING THE LV-1101/1102 WITH THE STRAIN RELIEF CABLE FITTING:  
a. Remove the gland nut and tapered rubber grommet from the strain  
relief cable fitting and slide them over the cable with the gland nut  
going on first.  
NOTE  
Check the match of the outside diameter of the cable with the inside  
diameter of the grommet. No more than .020" of play should be  
evident.  
1
/
b. Strip the outer jacket of the cable back 5 2 inches. Strip the insulation  
from the individual conductors approximately 1 4".  
/
c. Spade Lugs supplied with each switch. Remove them from the terminal  
strip and crimp or solder to appropriate leads.  
d. Feed cable up through cable fitting and attach leads to terminal strip per  
Figure 1 or Figure 2 Wiring Schematics, below.  
e. Push the rubber grommet into the conical hole in the cable fitting,  
allowing enough cable to protrude from the opposite side to allow some  
slack in the leads attached to the terminal strip. Grip the cable to  
prevent rotation and thread the gland nut onto the cable fitting to seal  
the grommet tightly to the cable.  
3
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WARNING  
THESE DEVICES ARE NOT EXPLOSION-PROOF. IF THESE LEVEL SWITCHES ARE INTENDED FOR USE  
WITH FLAMMABLE LIQUIDS, OR IN HAZARDOUS AREAS, THE MECHANICAL RELAY INSIDE CAN BE  
MADE INTRINSICALLY SAFE WHEN PROPERLY WIRED TO AN INTRINSICALLY SAFE RELAY SWITCH,  
SUCH AS OMEGA’S LVC 550 SERIES INTRINSICALLY SAFE RELAYS. THEY MUST BE INSTALLED IN  
ACCORDANCE WITH THE NATIONAL ELECTRIC CODE (NEC) BY PERSONNEL EXPERIENCED WITH  
INTRINSIC SAFETY WIRING.  
2. WIRING THE LV-1101/1102 W/OPTION ‘D’ WITH STRAIN RELIEF  
CABLE FITTING.  
a. Remove the gland nut and tapered rubber grommet from the strain  
relief cable fitting and slide them over the cable with the gland nut  
going on first.  
NOTE  
Check the match of the outside diameter of the cable with the  
inside diameter of the grommet. No more than .020" of play  
should be evident.  
b. Strip the outer jacket of the cable back 2 inches. Strip the insulation from  
the individual conductors approximately 1 4".  
/
c. Each microswitch is supplied with 3 flag slip-on terminals. Remove  
from the microswitch and crimp or solder to the appropriate leads.  
d. Feed the cable up through the cable fitting and attach the leads to the  
microswitches per Figure 1 or Figure 2 Wiring Schematics, below.  
e. Push the rubber grommet into the conical hole in the cable fitting. Slide  
the cable thru until the end of the jacket is flush with the inboard end of  
the cable fitting. Grip the cable to prevent rotation and thread the gland  
nut onto the cable fitting to seal the grommet tightly to the cable.  
3. If using a fitting other than the strain relief cable fitting, attach the fitting to  
the body and attach the conduit to the fitting and wire to local code per  
Figure 1 or Figure 2 Wiring Schematics.  
Microswitch actuation point may be monitored by an audible click or with  
an OHM meter before connecting line power to the terminal strip or by  
monitoring the voltage supplied to the load through the microswitch.  
4
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Figure 1: Wiring Schematic for power applied to the load when the liquid  
level is LOWER than the set point (power to the load is interrupted when the  
liquid level is ABOVE the set point).  
Figure 2: Wiring Schematic for power applied to the load when the liquid  
level is HIGHER than the set point (power to the load is interrupted when the  
liquid level is BELOW the set point).  
5
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6
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Notes  
7
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Where Do I Find Everything I Need for  
Process Measurement and Control?  
OMEGA…Of Course!  
TEMPERATURE  
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Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies  
Wire: Thermocouple, RTD & Thermistor  
Calibrators & Ice Point References  
Recorders, Controllers & Process Monitors  
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Infrared Pyrometers  
PRESSURE/STRAIN FORCE  
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Transducers & Strain Gauges  
Load Cells & Pressure Gauges  
Displacement Transducers  
Instrumentation & Accessories  
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FLOW/LEVEL  
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Rotameters, Gas Mass Flowmeters & Flow Computers  
Air Velocity Indicators  
Turbine/Paddlewheel Systems  
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pH/CONDUCTIVITY  
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pH Electrodes, Testers & Accessories  
Benchtop/Laboratory Meters  
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Industrial pH & Conductivity Equipment  
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DATA ACQUISITION  
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Communications-Based Acquisition Systems  
Plug-in Cards for Apple, IBM & Compatibles  
Datalogging Systems  
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Recorders, Printers & Plotters  
HEATERS  
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Heating Cable  
Cartridge & Strip Heaters  
Immersion & Band Heaters  
Flexible Heaters  
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Laboratory Heaters  
ENVIRONMENTAL MONITORING AND CONTROL  
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Metering & Control Instrumentation  
Refractometers  
Pumps & Tubing  
Air, Soil & Water Monitors  
Industrial Water & Wastewater Treatment  
pH, Conductivity & Dissolved Oxygen Instruments  
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M0775/0297  
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