Selco Genesis 90, Руководство по ремонту

Страница: 43 / 47

Unless specified otherwise, all the measurements must be taken with the boards fitted, together with their connections!
42 Description, testing and replacement of the electronic boards, current calibration
10.10) Output current calibration (delivered and displayed)
WARNING!
Calibration of the generator's output current must be performed preferably with a static load!
The generator can also be calibrated while cutting but in this case two people are needed: spark on a 4-5mm thick
suitably sized piece of iron and continue cutting at a moderate and regular speed; at the same time a technician must
check with an ammeter clamp that the output current is stable and then calibrate the trimmers as indicated below.
Exthernal accurate measurement of actual output current is required!
You are advised to use an ammeter clamp with class 2 minimum rating, accurately calibrated (calibration certificate
issued no more than 12 months previously).
If a static load is used, keep check of the generator's output current as well (see section 3.3).
WARNING!
Output current calibration could be required only in one of the following cases:
- inverter group replacing
- front panel replacing
- replacement of Hall-effect current probe
Due to all spare parts being factory setted & calibrated, "calibration procedure" should be perfomed only once the failure has been
removed, the power source is proven to work correctly and a deviation of more than 3A is find in delivered and/or displayed out-
put current!
In case of incorrect calibration performing, the machine will deliver a totally wrong current during welding and damages
could occur to the welding power source itself!