SOR Single Point Ultrasonic Level Switch - Manual (Page 6)

6/16 Form 841 (08.13) ©SOR Inc.
Calibration and Functional Test
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.
No calibration is needed. Units are
calibrated at the factory. No user
adjustments are required.
Functional test may be done with or
without a current meter. See
for
wiring configuration. See Figure 8 for
component location.

Connect power to the circuit board
as shown in .

With a dry sensor, move the Wet
Probe Switch (see ) to 8mA
position. The red LED will light.
The current meter will read l6mA
(±1 mA).
Wet Probe Switch
Yellow
LED
8mA
8mA 16mA
Red LED 16mA
J1 Receive
Jack
J2 Transmit Jack

Apply process liquid to the sensor. The red LED will turn off, and the
yellow LED will light. The current meter will read 8mA (±1 mA).

With liquid still applied to the sensor, move the Wet Probe Switch to the 16mA
position. The yellow LED will turn off, and the red LED will light. The current meter
will read 16mA (±1 mA).

Remove the liquid from the sensor. The red LED will turn off, and the yellow LED will
light. The current meter will read 8mA (±1 mA).
Delay Timer Operation (DT accessory)
Current Output Chart
Yellow
LED (Dry)
Red LED
(Wet)
Current Meter
(+ 1mA)
Sensor Status
Wet Probe
Switch Position
  8mA Wet 8mA
  16mA Dry 8mA
  16mA Wet 16mA
  8mA Dry 16mA
 LED On
 LED Off