CHAPTER 3: OPERATING INSTRUCTIONS
DUAL PULSE 125
STORED ENERGY RESISTANCE WELDING POWER SUPPLY
3-2 990-270
Select Schedule
Press RUN if a PROGRAM indicator is lit. Press SCHEDULE to select any schedule number from 0
to 7.
As each schedule is displayed, the 1ST PULSE %ENERGY associated with that Schedule will be
displayed.
As soon as SCHEDULE is released, the capacitor bank will be charged to the %ENERGY
displayed.
Change Energy Level
Press SCHEDULE to select Schedule 0. In the RUN State, only the 1st Pulse for Schedule 0 can be
changed. To change the 2nd Pulse or either pulse for Programs 1 to 7, you must first be in the
PROGRAM State - refer to Programming Weld Schedules.
NOTE: Any attempt to press ENERGY in the RUN state to change Schedules 1 through 7 will
result in a flashing error message of [ ]. Press [RUN] to clear the error code.
Press ENERGY to set the Energy Level of the 1ST Pulse. When the key is released the 125DP will
charge the capacitor bank to the %ENERGY displayed. The amount of energy used to make the weld is
determined by the %ENERGY. For the 125DP, 100% energy is 125 watt-seconds.
Dual Pulse Welding
Dual Pulse Welding consists of two pulse outputs for a single welding sequence. The 1ST Pulse will be
immediately followed by the 2ND Pulse. The energy contained in each pulse can be set independently.
This feature is useful when welding plated materials and small wires. Typically, the 1ST Pulse should
be approximately one-third to one-half the energy of the 2ND Pulse. The 2ND Pulse performs the weld.
The 1ST Pulse is used to seat the electrodes and, if applicable, force the plating from the weld area.
SELECT
2ND PULSE - Press [2ND PULSE PROGRAM]. The %ENERGY of the 2ND Pulse will be
displayed. The 2ND PULSE INDICATOR will begin flashing. The 2ND Pulse can now be changed.
Press ENERGY to change the 2ND PULSE %Energy Display.
Press RUN to return to the 1ST PULSE %ENERGY DISPLAY.
The 2ND PULSE INDICATOR will stop flashing.
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