TTFM 6.1 INSTRUCTION MANUAL
74
SENSOR CABLE & TRANSDUCER RESISTANCE TEST
Unplug the green sensor terminal from the Transit Time board with the sensor wires still connected and the BNC
end of the cable is connected to the transducer. With a multimeter, perform resistance checks for each set of
wires. One single loose terminal may cause false readings.
Test across shield and core of each wire: TDR1 and TDR2. Resistance should be around 10K ohms for any cable
length. High readings indicate an open circuit and low readings indicate a short or partial short in the sensor cable
connections or transducer.
Note: The TTFM 6.1 will automatically detect connectivity to the sensors. Confirm that TTFM 6.1 indicates
“
Sensor
Good
” in the messages menu if your resistance measured is approximately 10K Ohms.
