KEPCO Kit 219-0547, Transition Circuit Kit BOP 20-50MG, GL and BOP 25-40MG, GL User Manual
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KEPCO, INC. 131-38 SANFORD AVENUE FLUSHING, NY. 11355 U.S.A. TEL (718) 461-7000 FAX (718) 767-1102
http://www.kepcopower.com email: [email protected]
5. Turn on the BOP, set voltage mode, enable the output and program a positive output voltage of +(full scale
voltage - 1)V value and set the current limit to full scale (e.g., for BOP 20-50MG, set PS to 19V, current limit to
50A).
6. Gradually increase the PS current, monitoring the DVM/ digital scope and the BOP front panel display and/or
the internal LED indicators DS3 and DS2 on A3A4 (see Figure 5 for location of LEDs). DS3 is green and goes
on when the Front End Module is in source mode of operation. DS2 is yellow and goes on when the Front End
Module is in sink (recuperation) mode of operation.
7. When PS current reaches approximately 0.05A ±0.02A for BOP 1KW 20V models, or 0.04A ±0.01A for BOP
1KW 25V models, note that the DVM indication jumps from zero to +2.5V ±0.3V.
8. When PS current reaches approximately 4.3A ±.0.64A for BOP 1KW 20V models, or 3.4A ±0.5A for BOP 1KW
25V models, green LED indicator A4A3DS3 goes off, yellow LED A4A3DS2 goes on, the BOP display
changes the message flag from “SOURCE” to “SINK” and the DVM jumps from +2.5V to zero.
9. Gradually decrease PS current. When PS current reaches approximately 1.34A ±0.2A for BOP 1KW 20V mod-
els, or 1.06A ±0.16A for BOP 1KW 25V models, green LED indicator A4A3DS3 goes on, yellow LED
A4A3DS2 goes off, the BOP display changes the message flag from “SINK” to “SOURCE” and the digital
scope will show a 15V, 5mS positive pulse.
10. Turn off the unit and disconnect all the test equipment from the BOP. Unplug the unit from the a-c input source.
3.5 REASSEMBLY PROCEDURE
CAUTION: The two screws at the top of the front panel must be installed last to avoid damage to the
front panel.
1. Attach the cover to the chassis using 14 screws.
2. Attach the two mounting ears to the chassis using three screws for each.
3. Install the power cord and connect the unit to source power.
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