ESAB Aristotig 405 AC/DC, Service Manual

Page: 66 / 92

- 66 -
3 COMMISSIONING A2
1. Turn on the unit; switch position 400 V; turn current potentiometer I2 fully anticlockwise. Set
mode selector switch to "2-Cycle DC". Adjust trimmer 2 (refer to component mounting dia-
gram of A2-2) until the display shows 003.
2. Turn the potentiometer I2 fully clockwise. Set mode selector switch to "2-Cycle DC". Adjust
trimmer 6 (refer to component mounting diagram of A2-2) until the display shows 401.
3. Turn the potentiometer I2 fully clockwise. Set mode selector switch to "2-Cycle AC2". Adjust
trimmer 4 (refer to component mounting diagram of A2-2) until the display shows 371.
4. The positive time can be adjusted by means of trimmer 2 (refer to component mounting dia-
gram of A2-1).
5. The gas lead time can be adjusted by means of trimmer 3 (refer to component mounting dia-
gram of A2-1). The gas lead time is factory-set to 200 ms.
6. The starter turn-off lag can be altered by means of trimmer 4 (refer to component mounting
diagram of A2-1).
7. The UP slope time can be increased or reduced by means of trimmer 6 (refer to component
mounting diagram of A2-1). When the time is altered, the UP slope potentiometer must be
turned fully clockwise. Make sure that the voltage on IC2 Pin 14 (refer to component mount-
ing diagram of A2-1) does not exceed 7.45 V.
8. The DOWN slope time can be increased or reduced by means of trimmer 5 (refer to compo-
nent mounting diagram of A2-1). When the time is altered, the DOWN slope potentiometer
must be turned fully clockwise. Make sure that the voltage on IC2 Pin 8 (refer to component
mounting diagram of A2-1) does not drop below 7.55 V.
NOTES: