SOR Single Point Ultrasonic Level Switch - Manual (Page 13)

Form 829 (08.13) ©SOR Inc. 13/16
Sensor Test Procedure

Disconnect a sensor cable from the PC board. Measure the capacitance across the pin
and shell of the male mini phono connector.
 Capacitance from 600 to 1500pf indicates circuit is good. Plug the sensor cable back
into the PC board. Go to step 2. See note below for epoxy sensor capacitance values.
 Capacitance lower than 600pf or higher than l500pf indicates that the circuit is bad.
For remote units, go to Step 1a. Otherwise, go to Step 3.
a. Disconnect a sensor cable from the remote interconnect board inside the sensor base.
Measure the capacitance across the pin and shell of the male coax connector.
 Capacitance lower than 600pf or higher than 1500pf indicates that the sensor is bad,
go to step 3.
 Capacitance from 600 to 1500pf indicates sensor is okay; the fault may be in the
extension cable. Replace the extension cable. Repeat step 1 to test the new cable.

Repeat step 1 for the rest of the sensor cables.

A replacement sensor can be ordered from the factory or the SOR representative in
your area. Required order information: model and serial numbers stamped on the
sensor nameplate.
Replacement Fuses
Find a match for the control model number stamped on the housing nameplate in one of
the boxes below. Ignore characters which fall in a
 space. Order from the box containing
the model number match.
SOR part numbers can be ordered from the factory or from the factory representative in
your area. Buss and Wickmann part numbers can be ordered from third party suppliers.
See page 1 for fuse location(s).
7  --P6- 
SOR part number .......................................2806-006
Wickmann part number .............................19374K
(1/2 slow blow)
7  --P7-
SOR Part number .......................................2806-003
Buss part number ......................................PCB1/2A
(1/2A fast acting)
7  --P8-*
SOR Part number .......................................2806-003
Buss part number ......................................PCB1/2A
(1/2A fast acting)
*Requires two fuses
Spare Parts
To order the correct PC board for a particular instrument, find a match for the nameplate
model number in the left column below. Ignore characters which fall in a
 space. Order a
part number from the column to the right of the model number. Include the serial number
of the instrument to ensure receipt of the proper board revision.