8 Troubleshooting
8.1 General Notes
The following hints will enable a technician to do an initial diagnostic or help in case of
incorrect or non-reproducible weighing results after commissioning and calibration.
8.2 Visual inspection
Component
Possible errors
Weighing object
Are all pipes, hoses and cables free from shunt forces?
Are the connections pliable and connected horizontally?
Are elements with a solid connection to the scale in direct contact with the surroun-
dings?
Has friction developed between the weighing object and its surroundings (e.g. dus-
ty openings,
)?
Cable junction box
Has moisture intruded?
Do all soldering and screw connections have secure contact?
Connecting cables
Is the sheath damaged?
Has moisture intruded?
Mounting kit
Is the lift-of protection in contact with the scale?
Are the constrainers stuck?
Load cell
Is the load cell parallel to the contact area?
Is the sheath of the load cell cable damaged?
Has moisture penetrated into the load cell cable?
8.3 Metrological controls
8.3.1
Checking the zero output signal of the load cell
-
Unload load cell.
-
Disconnect the load cell measuring outputs.
-
Check whether the output voltage without load is within the limits.
Type
Output voltage
D1
0
+0.04 mV/V
8.3.2
Checking the strain gauge bridge of the load cell
-
Do not exceed the test voltage.
-
Check whether the values of the resistors are within the permissible limits.
8 Troubleshooting
Compact Compression Load Cell PR 6211
Minebea Intec
EN-17
