WTC Technitron T2050 - Primary Current Calibration Procedure

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Remember: If any range jumper is changed the control is NOT
calibrated in the new range. If the jumper is returned to the
original calibrated position, the control is still NOT calibrated.
Calibrated current values reside in two memory locations, one for
primary and one for secondary. The control does not "know" or
remember where the range jumpers are located.
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To calibrate primary current, follow this procedure:
1. Choose a primary current range (W1 – W4) that cannot be
exceeded at a 99% available current weld.
2. Turn off power and set SW1–1 to be OPEN (AVC Mode).
3. Program a simple weld schedule:
SQUEEZE 20 CY
WELD TIME 15 CY (TURNS RATIO = 1)
WELD CUR 99%
HOLD 10 CY
OFF 0 CY
4. Set all other functions off (set to 0), EXCEPT Impulses and
Turns Ratio = 1.
5. Make a weld, with or without work. Measure the secondary
current with a secondary current meter such as Technitron’s
WS10, blanking the first 3 cycles in the measurement on the
WS10. (First = 4, last = 15 on the WS10 or WS25.)