Denso BHT-8000 User Manual page 35

ï The BHT has an integrated rechargeable backup power source which backs up the memory and
calendar clock in the BHT when no dry cells or battery cartridge is loaded or the voltage level drops
below the specified level. The backup power source is automatically charged by the dry cells or
battery cartridge.
When you first load dry cells or battery cartridge after purchase or you load them (it) after leaving
the BHT unused for a long time, do not remove the dry cells or battery cartridge for 10 minutes or
more after that loading. This is for charging the memory backup source integrated in the BHT.
ï If you leave the BHT without dry cells or battery cartridge loaded for a long time, the memory
contents will no longer be backed up so that the message "Contact your administrator. Note the
error number. (XXXX)" or "Set the current date and time." may appear on the LCD.
ï If you will not be using the BHT for a long time, follow the instructions given in Subsection 2.3.5,
"Battery Replacement Notes."
ï Avoid storing the rechargeable battery cartridge in a hot place. The battery capacity may be
decreased.
ï Do not touch the terminals of dry cells or rechargeable battery cartridge or stain them. Doing so
could result in a BHT failure or cartridge charging failure. It is recommended that you wipe those
terminals with a dry, soft cloth periodically.
ï When a rechargeable battery cartridge is first used or has been left unused for a long time, it may be
inactive and may not output sufficient power. You need to charge and discharge such a battery
cartridge several times to make it active, by inserting it into the battery cartridge slot of the
CU-8001/8021 or by using the C-600. For the charging procedure using the CU-8001/8021, refer to
Chapter 5; for that using the C-600, refer to the "C-600 User's Manual."
ï Do not use batteries or power sources other than the specified
ones; doing so could generate heat or cause malfunction.
Chapter 2 Getting Started the BHT and System Mode
19