SOR Multi Point RF Level Switch - Manual (Page 8)

8/36 Form 677 (05.13) ©SOR Inc.
For Actual Level Set up, the process must be positioned to maximum level to set the probe
span. The process is then lowered to each set point in turn, and at each stop the
appropriate set point threshold is adjusted.
See to locate adjustments when setting up a remote mounted probe. See to locate
adjustments when setting up an integrally mounted probe. (If process level cannot be raised to
maximum level or conveniently moved to desired set point levels, use the Calculated procedure
on next page.) Before starting the Actual Level procedure, make sure that the following steps
have been completed.
SPAN ADJUST
 lnstrument installed with power applied.
 Process steady at maximum level.
 Probe span pot fully CCW (twenty five turns CCW).
 Turn all set point adjust pots fully CCW (25 turns CCW).
 Turn all on and off delay pots fully CCW (One turn pots).
 Set all failsafe switches to LO position.
 Both range selection DIP switches off (open).
Watch the probe loading LED:

LED is on — close DIP switch1 and go to step 2.
LED is off — go to step 3.

LED is on — close DIP switch 2 and go to step 3.
LED is off — go to step 3.

Turn the span pot CW until the probe loading LED lights, and then CCW to the point
where the LED goes off.
Slowly cycle the process up and down to verify the stability at which the LED goes off (per
your requirement).
SETPOINT ADJUST
Lower process to set point 1 level (set point 1 removed for model 665 & 667) and continue
on the page which matches the first three digits of the model number.
661........p. 14 662 ........ p. 16 663 .........p. 18 664 ....... p. 20
665........p. 22 666 ........ p. 24 667 .........p. 26 668 ....... p. 28
Actual Level Set up
Units in Hazardous Locations — Prior to calibration, make sure that the
work area is declassifi ed before removing the explosion proof cover to
calibrate the unit. Failure to do so could result in severe personal injury or
substantial property damage.