Badger Meter 228 Series, Руководство по установке и эксплуатации

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10
Troubleshooting
1) If the voltage at the sensor input is less than 7.0
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 8.0 VDC and 20.0 VDC. If the
voltage at the sensor input is still below 7.0 VDC
or 3.0 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 termi-
nals 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 clos-
est 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 for Series 250
or remove top lock nuts for Series 228 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.