Appendix, Adjustments and calibration, Troubleshooting – Rice Lake Translink Parallel Link Truck Scale Assembly User Manual
Page 8: Figure 4-1. summing board and potentiometers
8
4. Adjustments and Calibration
Note: Proceed with the adjustments and calibration only after the grout under the
base plates is completely hardened and all mounts are firmly bolted in place.
1.
Your local Weights and Measures regu-
lations will dictate the type of test re-
quired, such as section test, corner test,
build up, etc.
2.
Adjust the junction box potentiometers
so that a weight placed anywhere on the
platform gives the same reading at each
load cell. For more detailed instructions
refer to the instructions sent with the
junction box.
3.
Watch for any unusual readings, which might indicate problems in the
installation. Remember, on any adjustment that you make, you should be able
to predict the outcome.
4.
After you install the bumper bolts, re-test the scale to see that it is weighing
properly. If the scale changes calibration, you know the problem is from the
bumper bolts, and not from the load cell mounting installation.
Refer to the digital indicator installation manual for specific calibration procedures
to use with the particular indicator.
5. Troubleshooting
1.
If the system powers up and gives some sort of stable digital readout that varies
with the load on the system, any system problems are probably caused by
factors other than the load cells. The load cells are often blamed for a
malfunctioning system, but 90% of the time, the problem lies elsewhere. Look
for mechanical causes for your problem first.
2.
If the system can be calibrated but doesn't return to zero, loses calibration, or
demonstrates non-linearity or non-repeatability, see the following chart for
possible causes and do the following checks.
CELL 1
CELL 4
CELL 2
CELL 3
INDICATOR
+EX
–EX
+SI
–SI
100 K
+SE
–SE
+EX
+EX
+EX
+EX
–EX
–EX
–EX
–EX
+SI
+SI
+SI
+SI
–SI
–SI
–SI
–SI
SHD
SHD
SHD
SHD
23126
Rev. A
SHD
JU1
JU2
JU3
JU4
100 K
100 K
100 K
Potentiometers
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Figure 4-1. Summing board and potentiometers