Load On Voltage Adjustment - Prodigit 3260A Series Operation Manual

36 PRODIGIT

3-11 Load ON voltage adjustment

The factory set " Load ON " voltage is 2 volt, the 3260A series Electronic load module starts
to sink current from power supply until the input voltage of 3260A series Electronic Load
module over the "Load ON" voltage.
The adjustable " Load ON " voltage is ranged from 2V to 20V, and is set by VR4 on the PCB
3.11.1 As the load ON voltage setting trimmer is located at the first PCB (P/N: 6523261A01 ).
3.11.2 Remove the 3260A mainframe's right hand side Alumina plate by loosen its screw on
the rear panel.
3.11.3. Using screw drive to set the VR4 to the most counter clockwise position. ( Maximum
load ON voltage ) then connect the AC power source(50Hz or 60Hz) to the AC Load
input of 3260A series module, adjust the AC output voltage to the required Load ON
voltage, the voltage of AC power source should be less than the maximum rating of
the LOAD ON voltage.
3.11.4 Set Load ON/OFF key to ON state, the "load" LED annuciator should be ON on the
front panel, and set the load current to 1 Amp by using Preset key, the set the Preset
OFF again after the load current is set.(Freq.= 50Hz or 60Hz)
3.11.5 Adjust the load ON voltage setting trimmer VR4 clockwise very slowly and stop
immediately until the load start to sink current from power source , then the LOAD
ON voltage setting is finished in this procedure.
3.11.6 Using the reverse procedure to re-install the 3260A series Electronic load module.