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Troubleshooting 63
EEPROM Initialization
EEPROM AlU6 on the A1 Front Panel Board stores the supply's GPIB address, model number, and constants required to
program and calibrate the power supply. If either the front panel board or the EEPROM is replaced, the power supply must
be reinitialized with the proper constants by running the program listed in Figure 3-18.
When the program pauses and asks you to make a selection, respond as follows:
Initialization (I) or Factory Preset Replacement (F)? I
After the power supply has been initialized, it must be calibrated as described in Appendix A of the Operating Manual.
After calibration, transfer the new calibration constants to the EEPROM's "Factory Cal" locations as described next.
Transferring Calibration Constants To Factory Preset Locations
A newly initialized and calibrated power supply has calibration constants in operating locations but does not have the new
factory calibration constants stored in EEPROM. This procedure transfers the calibration constants into the EEPROM
FACTORY PRESET CAL locations by running the program listed in Figure 3-18.
When the initialization program pauses and asks you to make a selection, respond as follows:
Initialization (I) or Factory Preset Replacement (F)? F
The new calibration constants will then be stored. Pre-initialized and tested A1 Front Panel boards are available for Analog
Programmable "bench" series supplies. (See Chapter 5, Table 5-4 for part numbers.)
A Bench Series Supply can be initialized and the new Factory Preset calibration constants loaded by temporarily replacing
the A2 Isolator board with an A2 GPIB board. Then follow the instructions above for "EEPROM INITIALIZATION" and
also "TRANSFERRING CALIBRATION CONSTANTS TO THE FACTORY PRESET LOCATIONS" described above.
After the supply has been Initialized, Calibrated, and the new Factory Presets stored, remove the GPIB board and reinstall
the original Isolator board.