Bench Test / WeldKing / PulseWave200

Test intent

Prove the machine is not stuck in a corrupt control or reset state.
Separate TIG torch, polarity, and gas-path faults from real AC or DC output faults.
Verify both DC TIG and AC TIG baselines after repair when the package requires them.

Tools and setup

Multimeter
Clean coupon for DC TIG and AC TIG proving
Known-good argon supply and regulator
Known-good torch and tungsten
Remote or pedal only if the installed package requires it

Pre-power checks

Check	Expected condition	Result
Torch polarity	torch negative as required by the local service note	pass / fail
Gas setup	stable argon flow, no obvious leak or blockage	pass / fail
Display reset state	display not stuck in all-8 or abnormal retained state	pass / fail
Remote or torch switch branch	only the intended control path connected for the test	pass / fail

Electrical and control checkpoints

Checkpoint	Expected value or behavior	Record actual
Display startup	normal display, not frozen at all 8s
Low-current TIG behavior	stable gas and arc at low current
DC TIG baseline	starts and holds normally
AC TIG baseline	starts and holds normally if AC mode is selected and the machine is configured correctly

Functional proof

Test	Pass condition	Result
Cold power-up	normal panel state, no retained corruption	pass / fail
DC TIG start	repeatable HF or start behavior with stable gas coverage	pass / fail
Low-current DC TIG	no abnormal instability at low current	pass / fail
AC TIG start	starts and sustains cleanly if AC package is required	pass / fail
Re-power retest	no return of abnormal display state	pass / fail

If it fails

All 8s or abnormal display: do reset-state and display branch checks first.
No HF start with otherwise healthy setup: stay in polarity, torch, and HF-start branch before the main board.
DC TIG healthy but AC TIG dead: keep the fault in AC-mode branch logic, not the whole machine.
Low-current TIG unstable: verify gas path and control-state before condemning the power stage.

Direct official parts pages

Use these only after the complaint has been proven to follow the torch, pedal, or control-accessory branch.
PulseWave200 parts category: official PulseWave200 parts path
PRO17 TIG torch WAT31100: official product page
FC25-HD foot pedal 07002510: official product page
FC25-WL wireless foot pedal 07002515: official product page

Post-repair release

Signoff item	Result
DC TIG baseline restored	pass / fail
AC TIG baseline restored if required	pass / fail
Gas path proven stable	pass / fail
No abnormal retained display state after power cycle	pass / fail

Technician: __________ Date: __________ Serial or shop tag: __________