Dr. Livingstone, I Presume WELDWISE 2400 - Manual (Page 138)

5. TROUBLE WITH VOLTAGE LEADS, READINGS OR CHANNEL
PROBLEM SYMPTOM OR POSSIBLE
CAUSE
POSSIBLE FIX
Voltage leads are broken. Inspect for damage, use an ohmmeter to check for high
resistance, flex and manipulate leads to see if readings change,
indicating an intermittent connection. Replace leads if
necessary. Refer to Chapter 7, Installing the Sensors.
Calibration has changed. Verify calibration by disconnecting leads from electrodes and
connecting to a 1.5V flashlight battery, also connect a DMM,
the reading on the multimeter should match the calibrated
reading on the Input Monitor screen. Recalibrate voltage if
necessary (Refer to Chapter 8, Calibrating the Sensors).
Voltage leads are not connected properly. Inspect electrical connections for poor connections or corrosion.
CALIBRATED
VOLTAGE SIGNAL IS
READING HIGHER OR
LOWER THAN
NORMAL OR
CALIBRATED
VOLTAGE SIGNAL IS
INDICATING A
FROZEN (static)
READING
Sensor Cable or weld monitor failure.
Inspect sensor cable for physical damage. A cable that is
deformed, severed, partially severed, shredded, abraded and/or
has bare wires showing may be suspect. With the flashlight
battery connected flex and manipulate leads to see if the
calibrated readings “jump” or change. If so disconnect sensor
cable from the weld monitor and replace with a spare sensor
cable. Try to reposition the new cable to avoid recurring
damage. Spiral wrap or guards will also help to protect cable.
FROZEN A/D READING
(VOLTAGE ONLY): The
Input Monitor indicates a
constant (static) A/D
reading for voltage. This
value never changes; the
other sensor channels
appear to be working and
the A/D values for these
channels are
changing/updating. Weld monitor has a problem with the
voltage channel. A static reading may indicate a problem with the weld monitor
voltage channel. Refer to Section 8, Trouble With Hardware.
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