D4023-EN
TMR3610 Operators Manual
65
FLOW CHART
Continued
1. Disconnect all the Load Cell wires
from the terminal blocks inside the J-
Box (leave the Indicator on while
connecting and disconnecting the wires,
it will not damage Load Cells or
Indicator if wires are shorted during this
step). Is reading on Indicator stable?
2. Zero balance the Indicator. (Press
“NET/GROSS” then “ZERO”). Indicator should
display “0”.
YES
Replace J-Box (be aware of electrical
interference that might affect your scale
such as: mobile phones, CB radios,
radio towers, electric motors, etc.).
NO
Note:
Hook up the Load Cells to the J-Box one at a time (only
one Load Cell connected at a time). This will get a reading for
each Load Cell. While performing this test, watch for any other
symptoms such as erratic/unstable display. Indicator flashing
“±RANGE”, negative reading, etc. If the Indicator reading
should ever appear abnormal with any Load Cell connected
then it is probably bad.
4. Record the Indicator reading
with the Load Cell connected.
3. Connect one Load Cell back into one of the terminals in the J-
Box. (The reading you get for each Load Cell is dependent on the
size and type of each Load Cell and how much weight is over each
Load Cell. In general, the number should be positive and stable.)
5. Stand or hang your weight over the
connected Load Cell. Record how much
the weight increased with your weight
over the Load Cell. (A scale with only
one Load Cell will weigh heavy.)
Note:
If the scale responded to your weight, that’s verification on
the J-Box is OK. If the scale did not respond, either that Load
Cell is bad or the J-Box is bad. Try the other Load Cells. If the
Indicator still shows no response, the J-Box is bad. (Replace J-
Box)
6. Disconnect the first Load Cell and reconnect a second one.
Record the Indicator reading. Stand or hang your weight over
the connected Load Cell. Record how much the weight
increased.
7. Repeat step 6 for the remaining Load
Cells. Remember to record your readings.
Do not expect the Load Cells to give the
same reading. It is common for Load Cells to
have readings that vary by hundreds, even
thousands. Especially when one is carrying
more weight.
8. Bad Load Cells will have a reading that is either unstable,
makes the indicator flash “±RANGE” or is more than three
times greater or less than the average of the others. Also the
readings of your weight over each Load Cell should be similar.
(Probably 4 times your actual weight). Any differences could
be an indication of a bad Load Cell or a structural problem.
Troubleshooting
