Troubleshooting; General Notes; Visual Inspection; Checks With Multimeter - Minebea Intec Load Cell S PR 6241 Manuel D'installation

Compression Load Cell S-Type PR 6241
8

Troubleshooting

8.1

General Notes

8.2

Visual inspection

Component
Weighing object
Cable junction box
Connecting cables
Mounting kit
Load cell
8.3

Checks with multimeter

8.3.1

Checking the zero output signal of the load cell

8.3.2

Checking the strain gauge bridge of the load cell

Minebea Intec
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.
Possible errors
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, …)?
Has moisture intruded?
Do all soldering and screw connections have secure contact?
Is the sheath damaged?
Has moisture intruded?
Is the lift-of protection in contact with the scale?
Are the constrainers stuck?
Is the load cell parallel to the contact area?
Is the adjustment chamber cover damaged?
Is the sheath of the load cell cable damaged?
Has moisture penetrated into the load cell cable?
- Unload load cell.
- Disconnect the load cell measuring outputs.
-
Check whether the output voltage without load is within the limits.
Type
D1, C3, C6
-
Do not exceed the test voltage.
-
Check whether the values of the resistors are within the permissible limits.
Max. test voltage
- Standard version 28 V DC
- Intrinsically safe version (PR .../..E) 25 V DC
Output voltage
0 ±0.02 mV/V
8 Troubleshooting
EN-20