Denso BHT-8000 User Manual page 129

(When dry cells are loaded)
(When the rechargeable battery
cartridge is loaded)
Shutdown due to low battery
Problem
When the BHT is turned on or during execution of program (System
Mode or application), the battery output level has lowered so that the
BHT no longer operates.
If lower battery is detected, the BHT beeps five times (for 0.1
second per beep) and then turns itself off. Depending upon the
battery level, the beeper may not sound five times.
Solution
If the BHT is loaded with dry cells, replace them; if it is loaded with the
rechargeable battery cartridge, replace or recharge it.
(For the charging procedure, refer to Chapter 5, Section 5.5.)
Calendar clock stopped
Problem
The calendar clock integrated in the BHT has stopped because:
- the dry cells or battery cartridge had been removed for a long time,
- dry cells had not been replaced, or
- the rechargeable battery cartridge had not been recharged for a
long time
The indication of 00/01/01 00:00 will change depending upon
the calendar clock state.
Solution
Set the calendar clock (refer to Chapter 2, Subsection 2.3.2).
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Chapter 4 Error Messages