AW Gear Meters PROSCAN - Manual (Page 10)

ProScan In-Line Process Sensor
User Manual
9
Operation
Once ProScan is calibrated and you make the proper electrical connections, the sensor is ready for
operation. Before attaching the sensor to the process line, however, it is advisable to perform a quick
check of the unit’s operation.
You must connect the sensor output to a digital display, multimeter or some other electronics that allows
you to monitor the ProScan’s mA output.
Applying Power
To view the unit’s internal electronics board, remove the screw cap on the sensor (see Figure 3, page
15). When you apply power to the ProScan sensor, the green LED on the unit’s internal electronics board
blinks.
When the sensor is operating within the current calibration range, the Green LED on the sensor’s
electronics board blinks alone. When over-range, the Red and Green LEDs blink, and when below range,
the Green and Yellow LEDs blink.
Test Output
1. Place a white paper towel on a table.
2. With the lens facing down, place the sensor on the towel. This should produce an output of
approximately 17 mA. The actual output may range from 16 to 19 mA; this is normal.
3. Lift the sensor straight up, approximately 2 inches above the towel. This should yield a signal of
4 to 4.5 mA.
4. Slowly lower the sensor back to the towel; the mA output will increase as the sensor gets closer
to the towel, eventually reaching approximately 17 mA.
If the sensor performs as stated in the previous test, it is ready for installation. If not, call AW Gear
Meters for technical assistance.
Notice
Notice