OHAUS 7000 Series, Service Manual

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CHAPTER 2 TROUBLESHOOTING
Ohaus Corporation www.ohaus.com 2-14 7000 Series T72XW Indicators Service Manual
Figure 2-8: Switches SW1-2 and SW1-4
The position of SW1-4 (also shown in
Figure
2-8
) determines whether metrologically significant EEPROM data for scale calibration is reset
when a master reset is performed. SW1-4 must be set to ON to reset EEPROM data. If SW1-4 is set
to OFF, metrological EEPROM data will not be affected by the master reset and the original
calibration will persist.
5 Apply AC power. During the power up sequence, the display will indicate a warning message of
[WARNING MASTER RESET! Press
ENTER to continue.
6 Press ENTER to perform a master reset. When the reset is complete, the screen will return to the
normal weight display.
OR
To exit without a master reset, do not press ENTER .
7 Remove AC power.
8 Return SW1-2 (and, if it was changed, SW1-4) to their original OFF positions.
9 Reapply AC power.
2.13 Upgrading Firmware
Contact your local authorized OHAUS CORPORTATION service representative for information
on upgrading firmware.