Troubleshooting; General Notes; Visual Inspection; Metrological Controls - Minebea Intec Novego Manuel D'installation

8 Troubleshooting

8 Troubleshooting
8.1

General Notes

8.2

Visual inspection

Component
Weighing object
Cable junction box
Connecting cables
Load cell
8.3

Metrological controls

8.3.1

Checking the zero output signal of the load cell

8.3.2

Checking the strain gauge bridge of the load cell

EN-39
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 pendulum base parallel to the contact area?
Is the displacement between the load cell and the pendulum base ≤1 mm?
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
- Do not exceed the test voltage.
-
Check whether the values of the resistors are within the permissible limits.
Max. test voltage
-
Standard version 32 V DC
-
Intrinsically safe version (PR .../..E) 25 V DC
Output voltage
0… +0.03 mV/V
Hygienic Weighing Module Novego®
Minebea Intec