KEPCO EL Series User Manual

INSTRUCTION MANUAL

KEPCO

An ISO 9001 Company.

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-vol­atile memory (referred to as NV RAM) of Kepco’s EL Series
Electronic Loads.

The EL Series uses two (2) types of memory to store cus­tomer 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 manufactur­ing state by using the procedure in section IV of this docu­ment.

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

(EEPROM)

SAVE, CLEAR

AND RESTORE

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 for­warded 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 Cer­tificate 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 pro­gram from www.kepcopower.com/utility/ to a Windows­compatible computer, running Windows XP or later.

2. Extract zipped files into a temporary directory.

KEPCO, INC. " 131-38 SANFORD AVENUE " FLUSHING, NY. 11355 U.S.A. " TEL [phone] " FAX [phone]

http://www.kepcopower.com " email: [e-mail]

©2013, KEPCO, INC 1
Data subject to change without notice 243-1353

3. Click on setup to install the program by following the on­screen 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 con­nected to the same computer used to save the data.

III — SAVING CALIBRATION DATA

Once the Calibration Data Save and Restore Program has
been installed (see Section II), the calibration data can be
saved.

Performing this procedure generates a copy of the current
values of the non-volatilie memory. This copy, if used to
restore the unit, does not meet the requirements of the
Certificate Of Volatility of the US government. By provid­ing the model and serial number of the unit, the factory
non-volatile ram contents file can be obtained from Kepco
Application Engineering support for the first two years
after manuafacture. If a Certificate Of Volatility is ordered
for the unit, the file will be available for 10 years mininum.

of the Kepco EL load with the message:

saving caldata, please wait ...

If there is a connection problem, an Error window (Fig­ure 3) will appear, which will display: Kepco not
found. Click OK to continue.

1. Launch the Program from the Windows Start menu, by
selecting All programs - Kepco - calsave.

2. When the Kepco EL Cal Save Restore window (Fig­ure 1) appears, select the serial port to which the EL
load is connected.

FIGURE 1. KEPCO EL CAL SAVE RESTORE WINDOW

3. Select SAVE SETTINGS to save the EL calibration
data.

4. If the connection is made, the Standard Input/Output
window opens (Figure 2), showing the Identifier string

FIGURE 2. STANDARD INPUT/OUTPUT WINDOW,

SAVING CALDATA

FIGURE 3. ERROR WINDOW

5. When the data has been saved, the Cal File Saved
window opens (see Figure 4), entitled Kepco EL
xxxxxxxx where xxxxxxxx is the serial number of the
EL Load, and the message Cal File Saved is dis­played. Click OK to end the program.

FIGURE 4. CAL FILE SAVED WINDOW

KEPCO, INC. " 131-38 SANFORD AVENUE " FLUSHING, NY. 11355 U.S.A. " TEL [phone] " FAX [phone]

http://www.kepcopower.com " email: [e-mail]

2 243-1353 010914