Troubleshooting - Data Industrial 200 Series Owner's Manual

Troubleshooting

1) If the voltage at the sensor input is less than 7 VDC in a No Flow situation, disconnect the sensor from the
barrier strip and measure the voltage at the sensor input terminals of the barrier strip again. It should be
between 8 VDC and 20 VDC. If the voltage at the sensor input is still below 7 VDC or 3 VDC, the problem
may be with the monitor (hardware or programming).
2) If you suspect that the sensor is bad, you can test the monitor circuitry by connecting a piece of wire to
one of the sensor input terminals and tap the other side of the wire to the other sensor input terminal.
Shorting across the sensor input terminals ON and OFF repeatedly allows the display to respond by trying
to calculate a flow rate for the frequency of your shorting action. If the display does not show a change
from 0.00, it indicates a problem with the monitor.
3) If the monitor tests ok and there are any splices in the cable, break the sensor cable at the splice closest
to the sensor and retry the shorting test in step 2.
4) If the cable tests ok, drain the pipe line, verify the pressure is off, and pill the clevis pin holding the sensor
electronics. Spin the impeller by hand. If flows are noted on the display, and impeller spins freely then the
flow rates may have been below our design minimums or the line was full of air. Try again. If the sensor
fails to respond then replace sensor.
Data Industrial Plastic Tee Type Flow Sensor Manual
9