Arc Machines 415 WDR - Manual (Page 39)

Model 415
Operation Manual
Document No. 740084
Revision N
34
2. Set the System Mode to WELD. Press Sequence Start.
3. The DMM should read 5.000 VDC
 0.010 VDC. If out of tolerance call AMI Service for
“DAC” calibration instructions.
4. Press SEQ. STOP key to end Welding Sequence.
5. Move the positive test lead to TP-3.
6. Set the System Mode to WELD. Press Sequence Start.
7. The DMM should read 2.50 VDC
 0.025 VDC. If out of tolerance adjust trim pot R-36.
8. Press MAN ADV. to level 2.
9. The DMM should read 5.00 VDC
 0.05 VDC. If out of tolerance call AMI Service..
10. Press SEQ. STOP key to end Welding Sequence.
7.
CURRENT CALIBRATION WITH EXTERNAL SHUNT
1. The following current calibration procedure outlines a second method using a certified
optional External Shunt available from AMI (P/N 1368246-01 shunt only or 1368248-01
shunt/ load bank kit). Following voltages and tolerances assume that shunt is 1 amp/mV
at 0.1%.
2. Connect External Shunt into ground path cabling of weld head or load.
3. DMM test leads must be connected only after Welding Current is established!
4. Set the System Mode to WELD. Press Sequence Start.
5. Insert the DMM positive test lead into red test jack and the negative lead into the black
test jack of the Shunt after Welding Current is established.
6. The DMM should read 200 mV DC
 2 mV. If out of tolerance adjust trim pot R-36.
7. Press MAN ADV. key to select level 2 (400 amps).
8. The DMM should read 400 mV DC
 4 mV. If out of tolerance call AMI Service.
9. Press SEQ. STOP key to end Welding Sequence.
10. Move the positive test lead to TP-3 and negative lead to TP-2.
11. Set the System Mode to WELD. Press Sequence Start.
12. The DMM should read 2.50 VDC
 0.025 VDC. If out of tolerance adjust trim pot R-39.
13. Press SEQ. STOP key to end Welding Sequence.