MA-5950_EN.doc
Page 5 on 15
Rev: 29-03-19
2.5.
Measurement errors
When the calibration is difficult and measurement errors are observed, it is necessary to check the installation. Mechanically, the cells must be free
in the direction of the load and well positioned. Electrically, the connections must be securing, the junction boxes exempt from humidity and the
cables intact. If there is no fault to be seen, it is necessary to verify the internal circuit.
SENSY can help to diagnose based on the associated diagnosis sheet provided in the appendix and filled in beforehand.
2.6.
Insulation test
The measuring of the insulating resistance is done with a multimeter. The
standardized testing voltage is 10 V. It is applied to a conductor. It can be
determined by disconnecting the measuring instrument and applying
voltage between one of the conductors and the metallic mounting
structure – or individually, cell by cell, to locate the leakage with precision.
The insulation must not, in any case, be lower than 2 G
Ω
for a 10 V
voltage. This insulation default will generate measurement errors if the
insulation resistance is lower than several hundred M
Ω
. Insulation default
can also be generated by environmental conditions (temperature,
humidity).
