KEPCO EL Series NV RAM Save, Clear, Restore - Manual (Page 3)

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]
010914 243-1353
3
IV — CLEARING NV RAM
CAUTION:
Clearing NV RAM will render the unit inoperative
until the restore procedure is executed. Calibration
data must be saved prior to clearing NV RAM!
The Clear function is executed from the EL front panel.
Safeguards are in place to avoid accidental or inadvertent
clearing of NV RAM. Executing the Clear function initiates
a series of erasures to NV RAM, including erasing unused
program space, followed by rewriting the program space
with multiple data patterns,
If execution of the Clear function is interrupted by a power
cycle, the clear operation is completed without notifying the
user.
1. Power unit off.
2. While depressing and holding the CONTROL knob,
power up the unit.
3. Once unit is powered up:
VOLTS display shows (NV).
AMPS display shows (CLER).
4. Release the CONTROL knob.
5. Press and hold LOAD pushbutton for approximately one
second, then release it.
VOLTS display shows
(ARE).
AMPS display shows (YOU).
KW display shows (SUR).
6. Proceed to step 7 to cancel the clear of NV RAM.
Proceed to step 8 to continue.
CAUTION:
Step 7 offers a final opportunity
to abort the NV RAM clear.
To execute NV RAM clear proceed to step 8.
7. To exit without clearing, rotate CONTROL knob. The
unit reverts to the normal power-up sequence without
clearing NV RAM.
CAUTION:
Executing step 8 will clear NV RAM
and render the unit inoperative until
the Restore procedure is executed.
8. To clear NV RAM, press LOAD pushbutton, hold for
approximately one second, then release LOAD push-
button.:
VOLTS display shows (CLRG).
AMPS display shows (NVRM).
Unit performs NV RAM clear, including writing multiple
patterns to prevent recovery of data, then restarts auto-
matically.
During power on tests, the erased state of NV memory
causes a rewrite of original firmware defaults, including
the backup copy.
The Restore function (see Section V) must be executed
before the unit can be used.