Tweco PAK 200i - Manual (Page 80)

PAK 200i
7-1� TORCH INFORMATION Manual 0-5335
1. To test the Torch Head center insulator for insulation breakdown use the following procedure:
a. Remove the Torch Head Assembly from the Torch Leads if not already done.
b. Remove the consumables from the Torch Head Assembly if not already done.
c. Connect a Hi-Pot Tester capable of producing �500 VAC between the positive pilot lead and the negative
lead fittings.
d. Increase the output of the Hi-Pot Tester to a maximum of �500 VAC.
• If the voltage drops to 0 VAC or leakage current is detected, then the Torch Head center insulator is
breaking down and the Torch Head must be replaced.
• If the Torch Head center insulator passes the test, then proceed to Step 2.
�. To test the Torch Leads for insulation breakdown use the following procedure:
a. Connect the Hi-Pot Tester between the positive pilot lead and the negative lead fittings. The fitting on
the other end of the Torch Leads must be separated (isolated) from each other.
b. Increase the output of the Hi-Pot Tester to a maximum of �500 VAC.
• If the voltage drops to 0 VAC or leakage current is detected, then the insulation between the Torch
Leads is breaking down and the Torch Leads must be replaced.
• If the Torch Leads passes the test, then proceed to Step 3.
3. Visually check that the torch switch wires, pilot lead connection, and negative lead connections are properly
connected and in good condition (no shorts or arcing).
• If problems are evident, repair or replace as required.
• If there are no visual problems, then proceed to Step 4.
4. Check the pilot lead, negative lead and switch control wires for opens from one end of the torch leads to the
other.
• If open, replace leads or open component of the Torch Leads Assembly.
• If not open, then proceed to Step 5.
5. Check the pilot and switch control wires for shorts to other components in the Torch Leads.
• If shorted, then replace Torch Leads.
• If not shorted, then proceed to Step 6.
6. Carefully reassemble the components and recheck the completed assembly per paragraph ‘B’, Step 3 to
confirm that the components have been properly assembled.
This completes the checks for the proper operation of the Torch Head and Torch Leads.