NovaLynx Corporation
260-RGAI-70
Page 8
May 2022
8
MAINTENANCE
The transmitter circuit board does not require calibration. To test the operation of the board
independently of the rain gauge, disconnect the rain gauge from the input terminals. Use a short piece
of wire to momentarily connect the input terminals on the transmitter circuit board, at 2-second
intervals. This will simulate pulses from the rain gauge. If the output of the transmitter fails to respond,
contact NovaLynx for a Return Authorization (RA) number.
9
TROUBLESHOOTING GUIDE
TROUBLESHOOTING MATRIX
Loop Current
= 0 mA
Current loop polarity is reversed
Open circuit in the cable
Power supply failure
Loop Current
< 4 mA
Low power supply voltage
Loop resistance too high
Loop Current
> 20 mA
Short circuit in the cable
Loop current does
not reach 20 mA,
otherwise operates
properly.
Low power supply voltage
Loop resistance is too high
