Dr. Livingstone, I Presume WELDWISE 2400 - Manual (Page 132)

PROBLEM POSSIBLE CAUSE OR
SYMPTOM
POSSIBLE FIX
Sensor failure. A damaged force sensor may result in an offset or inaccurate
readings. Use the Input Monitor to observe the force channel
readings, then refer to the force sensor manufacturer
specifications and determine what the mV output of the sensor
should be at a given force. +/-32767 A/D readings are
equivalent to +/- 20mV. Apply and remove force and see if the
A/D input readings compare to what the sensor readings should
be. If the values seem to be incorrect, there may a problem with
the sensor, sensor cable, or weld monitor hardware. Try using a
known good spare sensor cable and/or weld monitor. If the
readings still appear to be incorrect, replace the sensor.
Sensor cable failure. Try using a spare sensor cable. Apply and remove force and see
if the A/D input readings compare to what the sensor readings
should be. If the values are still incorrect, there may be a
problem with the sensor or weld monitor.
INACCURATE A/D
READINGS: The Input
Monitor indicates the force
sensor A/D readings are
changing but the readings
may not be correct.
Weld Monitor failure. Try using a spare weld monitor. Apply and remove force and
see if the A/D input readings compare to what the sensor
readings should be. If the values are still incorrect then there
may be a problem with the sensor or the sensor cable. Refer to
Section 6, Possible Sensor Cable Failure.
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