Measurements And Tests; Z001 Main Circuit Card - Kemppi Minarc Evo 150 Service Manual

Service manual Minarc Evo 150 and 180
The following example uses a clamp meter. See the previous two chapters to study button configurations
(Pictures 2 and 3) and parameter info (Picture4).
1. Switch off the machine. If a resistive load is available, this is the best option, connect the
resistive load via welding cables between the machine output Dix connectors. The ma-
chine must be switched off to avoid arcing while connecting the cable. If a resistive load
is not available, it is possible to use a long welding cable (4 to 10 meters if possible) the
longer the cable the more accurate the current measuring.
2. Enter the calibration mode, ON LED starts plinking (procedure on picture1).
3. Move to the calibration parameter 1 (procedure on Picture2). Turn the potentiometer to
minimum and check the measured current in the clamp meter value. Adjust parameter
value (procedure on Picture3) as close to 10A as possible, below 10A is better than
above it.
4. Move to parameter 2 (procedure on Picture2). Turn the potentiometer to maximum and
check the measured current in the clamp meter value. Adjust parameter value (procedure
on Picture3) as close to 150A as possible, above 150A is better than below it.
5. Move to parameter 3 (procedure on Picture2). Turn the potentiometer to minimum and
check the panel display value. Adjust parameter value (procedure on Picture3) as close
to 10A as possible, exact value is ideal. If this is not possible, select the one below 10A.
6. Move to parameter 4 (procedure on Picture2). Turn the potentiometer to maximum and
check the panel display value. Adjust parameter value (procedure on Picture3) as close
to 150A as possible, exact value is ideal. If this is not possible, select the one above
150A.
7. Switch off the machine, disconnect the welding cable or load and connect the remote
controller.
8. Enter the calibration mode (procedure on Picture1) and move to parameter 5 (procedure
on Picture2). Turn the remote controller potentiometer to minimum and check the panel
display value. Adjust parameter value (procedure on Picture3) so that it is three steps
below the point where it changes from 11A to 10A.
9. Move to parameter 6 (procedure on Picture2). Turn the remote controller potentiometer to
maximum and check panel display value. Adjust parameter value (procedure on Picture3)
so that it is three steps above the point where it changes from 139A to 140A.
10. Move to parameter 7 (Picture2). Turn the remote controller potentiometer to maximum
and check the current set value in the panel display. Adjust parameter value (procedure
on Picture3) so that it is three steps above the point where it changes from 149A to 150A.
11. The calibration is now completed and once machine is switched off and restarted, the
parameters are saved.
At this point it is good to check that the current set value can be adjusted from 10A to 140/150A with both
panel potentiometer and remote controller.

4.3. Measurements and tests

4.3.1. Z001 Main circuit card

Power stage is divided in to two parts: rectifier/PFC module and IGBT module. They can be tested
separately by using simply digital multimeter.
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Kemppi Oy
Version 1.3 30.9.2015