SOR Multi Point RF Level Switch - Manual

Form 677 (05.13) ©SOR Inc. 1/36
The Multipoint Electronic Level Switch is a level sensing device which reads
process level by capacitance measurement.
Capacitance varies according to the height of the process inside the vessel.
Capacitance variation in the circuit is electronically monitored, and DPDT
relay contacts change state at user selected set points to signal process
presence at specific process levels.
660 Multipoint
Electronic Level Switch
General Instructions
Registered Quality System to ISO 9001
Design and
specifications are
subject to change
without notice.
For latest revision, go to
www.sorinc.com
NOTE: If you suspect that a product is defective, contact the factory or the SOR ®
Representative in your area for a return authorization number (RMA). This product
should only be installed by trained and competent personnel.
Table of Contents
Sensing Level Confi guration ...................... 2
Adjustable Differential Set Points ................ 2
Set up ................................................. 3
Probe Installation ................................... 3
Installation of Separate Electronics Housing ... 3
Remote Cable Connection ......................... 3
Electrical Supply/Control Cable Connection .... 4
Probe Set up Overview and Considerations .... 6
Probe Tip Termination Notes ...................... 7
Actual Level Set up ................................. 8
Calculated Set up ................................... 9
Calculated Set up Worksheet Sample ......... 13
Model 661 Set pt. Set up and Output Wiring . 14
Model 662 Set pt. Set up and Output Wiring . 16
Model 663 Set pt. Set up and Output Wiring . 18
Model 664 Set pt. Set up and Output Wiring . 20
Model 665 Set pt. Set up and Output Wiring . 22
Model 666 Set pt. Set up and Output Wiring . 24
Model 667 Set pt. Set up and Output Wiring . 26
Model 668 Set pt. Set up and Output Wiring . 28
Control Drawings ................................. 31
Dimensions ........................................ 33
For example, when process level rises to set point 4, relay 4 changes state to sig-
nal process presence at set point 4. The DPDT relay 4 maintains its state as long
as process level is above set point 4. When process level falls below set point 4,
relay 4 contacts return to their original state.