SOR Multi Point RF Level Switch - Manual (Page 10)

10/36 Form 677 (05.13) ©SOR Inc.
Set Threshold for Level A
Watch the probe loading LED:

LED is on — close DIP switch 1 and go to step 2.
LED is off — go to step 3.

LED is on — close DIP switches 1 & 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 LED on and off as required to find the precise threshold at which the LED
goes off. The instrument is now tuned to the picofarad value for Level A.
Find Picofarad value for Level A
For Models 66
R, 66W
Refer to .
The probe is replaced by the capacitor substitution box to determine the picofarad value for
level A.
Remove three #6 Torx head screws and pull the PC board out of the remote probe housing.
Unplug the probe lead wire from the probe.
To place the capacitor substitution box into the circuit, clamp one of the alligator clips to
the mini-banana plug on the end of the probe lead wire. Clamp the other alligator clip to the
shield drain wire (ground) as it enters the signal cable terminal strip.
Probe span pot
Probe loading LED
Probe ground lead
Off (open) position
Probe lead
Range selection
DIP switches
[On (closed) position]
For Models 66
J
Refer to .
Pry the spring steel PC board
retaining clip off of the top of
the PC bracket assembly.
Unplug the ribbon connec-
tor and slide the set point
adjustment board up to access
the probe lead wire. Unplug
the probe lead wire from the
probe. Plug the ribbon con-
nector back in.
Clamp one of the alligator
clips to the mini-banana plug
on the end of the probe lead
wire. Clamp the other alligator
clip to the ground screw on
the housing floor.