ETS-Lindgren 2090 Controller - Manual (Page 137)

Model 2090 Multi-Device Controller
APPENDIX B: MAINTENANCE
The following sections describe various field maintenance
that may be performed on the Model 2090 Controller.
Maintenance should only be performed by qualified
personnel.
NVRAM BATTERY BACKUP
The Model 2090 uses three 1.5V “AAA” alkaline batteries
(type EN92 or equivalent) to maintain the current position,
limits, and parameter settings in non-volatile RAM. To
ensure reliable operation of the Model 2090, it is
recommended that these batteries be replaced once a year.
If the Model 2090 regularly reports an NVM initialization
error ( E001 ) this is an indication of dead batteries.
INSTALLATION
The replacement batteries should only be installed by
qualified personnel. Anti-static precautions should be
maintained at all times. To reduce the risk of damage, the
Model 2090 may be returned to ETS for upgrade,
inspection, and test for a nominal fee. Contact the ETS
Sales department for more information.
To replace the NVRAM batteries, perform the following
steps.
1. It is recommended that you record all device parameter
settings prior to replacing the batteries, since it may be
necessary to re-configure the Model 2090 when done.
©ETS-Lindgren, April 2006 137
Revision G– P#399199