MPE DP SERIES II, Operating And Service Manual

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Once a digital potentiometer has been selected for adjustment, pressing the up/down keys
increments or decrements the potentiometer setting. To save the new setting, press the enter key
or press the clear key to exit the routine. Instructions for the calibration procedure are discussed
in Section 7.3.1.
After selecting digital potentiometer 5, pressing the item key displays the firmware revision in
the voltage display and the hardware revision in the current display. Pressing the item key again
displays dEF (default) in the voltage display. Pressing the enter key resets the five digital
potentiometers to the factory default settings.
To exit the calibration menu, press the item key until rEt (return) appears in the voltage display.
Press the enter key to exit the calibration menu.
3.1.1.5 Programming Sequential Step Applications
DPD Series power supplies have the powerful feature of programming output voltage, output
current, over voltage trip, over current trip, and period for 100 memory states. The different
states can be selected by the user, timed stepped, or triggered through the front panel or rear
connector. Memory states 0 through 9 can be set though the front panel and memory states 0 to
99 can be set through the RS232, optional IEEE-488, or optional Ethernet interface. When the
power supply is at memory states 10 through 99, E (extended) will be displayed in the mem
(memory) display. The programming variables are defined as follows:
1. MEM: memory location for parameters stored.
2. Voltage: output voltage set point. The default state is 0 Vdc and the maximum voltage
setting is the rating of the power supply.
3. Current: output current set point. The default state is 0 Adc and the maximum current
setting is the rating of the power supply.
4. OVT: over voltage trip. The default state and maximum settings are 110% of the voltage
rating of the power supply.
5. OCT: over current. The default state and maximum settings are 110% of the current
rating of the power supply.
6. Period: time period or interval at the current step. Special meanings are given to time
periods of 0, 9998, and 9999 as described below.
To initiate sequential step operation, the power supply must first be programmed and armed by
pressing the arm key on the front panel or by triggering terminal 36 of JS1 located at the rear of
the power supply. The program is initiated by pressing the start switch on the front panel or by
triggering terminal 17 of JS1. Once triggered the power supply will attempt to run through the
program programmed for each memory step.
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