The EPROM contains the program for the operation of the charger.. i.e. IQ 3000 software. The one you see here is my own idea, this one contains 3 software's - IQ 3000, the older Super IQ with battery Shock / Revival feature, and the older Lin-R-Flex option, as you lose these when you go to the 3000 software, and the third is the Promatch software for Grading cells with a multiplexer.. Normally you would have to change EPROM's for the different software's, and this can be a real pain as you could bend or break a pin off the chip, so I came up with this modification and many of you have this upgrade..
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(HOPE TO POST INFORMATION AND PICTURES ABOUT THIS SOON)
Calibration Procedure
VR 1 Is the voltage calibration pot.
VR 2 Is the current calibration pot.
When calibrating your Victor charger, ( Voltage calibration first!! ) place your charger in DVM function, ( Special functions, Utilities, DVM=1 ) and connect a single cell to the volt meter leads of the charger, next connect a High Quality! Digital Volt Meter in parallel with the Victor volt meter leads, and adjust VR 1 to match what your High Quality Digital Volt Meter reads! Special Note!!! Do not use any Radio Shack DVM's or any other that is under $250.00 as the ADC's in these meters are not Linear and are not as good as the one that is in your Victor Charger ( Remember your accuracy depends on the quality of your DVM that you use for calibrating!! )..I use High end Fluke meters for calibrating.
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After you have calibrated the Volt meter section of you Victor charger you will have to calibrate the Charge Current section of your charger..You will need to connect a Digital Amp meter in series with a 6 cell battery and start charging your battery with the Victor charger, adjust VR 2 for the same current as what your external Digital Amp meter reads.
You can use a charge current of around 4 amps for your calibration... Remember to make small adjustments of the pot and allow the Victor charger to stabilize a few seconds before you make any other adjustments. Once this is completed your charger is calibrated and is ready for use.