KEPCO EL Series NV RAM Save, Clear, Restore - Manual

©2013, KEPCO, INC 1
Data subject to change without notice 243-1353
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]
I N S T R U C T I O N M A N U A L
KEPCO
An ISO 9001 Company.
NV RAM
SAVE, CLEAR
AND RESTORE
(EEPROM)
NON-VOLATILE MEMORY
SAVE, CLEAR AND RESTORE PROCEDURES
I — INTRODUCTION
This manual documents the procedures required to save,
clear and restore data stored in EEPROM (Electrically
Erasable Programmable Read-Only Memory), the non-vol-
atile memory (referred to as NV RAM) of Kepco’s EL Series
Electronic Loads.
The EL Series uses two (2) types of memory to store cus-
tomer data within the processor chip. The processor chip
contains a volatile Random Access Memory (RAM) and a
Flash (EEPROM) Memory. The Flash memory is divided
into regions, Program Memory, and Variable and Settings
memory. Power cycling the EL will erase all data stored in
RAM memory during the power up self test. However, Flash
memory must be erased or reset to the original manufactur-
ing state by using the procedure in section IV of this docu-
ment.
The EL Series uses EEPROM to store the unit’s identity,
calibration constants, front panel settings and certain other
operating parameters. Though the command sequences
for storing this information are not published, clearing NV
RAM guards against the possibility that this data can be
changed in the field by a sophisticated or properly trained
individual.
The EL Calibration Save and Restore program must first be
downloaded and installed (see Section II). Each time the
NV RAM is to be cleared, the calibration data must first be
saved (see Section III), then the NV RAM can be cleared
(see Section IV).
Once the Clear function is executed, the unit will no longer
function and will not accept any front panel inputs until the
Restore function is executed (see Section V). The Restore
function restores the previously saved calibration settings.
Upon request from Kepco, the original factory calibration
constants can be accessed and the unit can be restored to
the original factory calibration condition.
Kepco can provide a Certificate of Volatility which insures
that the factory calibration constants of the specific unit are
saved by Kepco for a minimum of 10 years and can be for-
warded to the customer after contacting Kepco application
support. If the Certificate Of Volatility is not ordered, the
factory calibration constants are only available for two
years after the unit was manuafactured.
The NV RAM Clear feature will not function until it is
enabled. It is enabled at time of order by requesting a Cer-
tificate of Volatility. If not requested at time of order, contact
Kepco application support to order a Certiifcate of Volatility
and receive the instructions to enable the feature.
II — INSTALLING CALIBRATION DATA SAVE AND RESTORE PROGRAM
NOTE: The EL Calibration Save and Restore Program
only needs to be downloaded and installed once.
1. Download the EL Calibration Save and Restore pro-
gram from www.kepcopower.com/utility/ to a Windows-
compatible computer, running Windows XP or later.
2. Extract zipped files into a temporary directory.
3. Click on setup to install the program by following the on-
screen prompts. An icon will be saved on the desktop,
and the program will stored in
c:\Program files\kepco\el_restore.
4. When data is saved it will be stored where the program
was installed. When restoring data, the EL must be con-
nected to the same computer used to save the data.