Denso BHT-8000 User Manual page 36

Checking the Battery Voltage Level
Pressing the ENT key while holding down the SF key may display the current voltage level of the power
source (dry cells or battery cartridge) as a bar indicator. (Releasing those keys will erase the indication.)
For details, refer to Subsection 2.3.4, "Displaying the Battery Voltage Level and System Status."
Low Battery Indication
Low battery warning
If the output voltage (of the dry cells or battery cartridge) drops below a specified lower level while the
BHT is in operation, the BHT displays the following warning message for approx. 2 seconds and beeps
three times. After that, it will resume previous regular operation.
The service life of the dry cells or the rechargeable battery cartridge will expire soon, requiring
replacement or recharge. If the BHT is driven by dry cells, replace them; if driven by the battery cartridge,
recharge or replace it.
Shutdown due to low battery
If you continue to use the BHT without replacement of the dry cells or recharge of the battery cartridge
after the low battery warning message appears, then the BHT displays the following message, beeps
five times, and then turns itself off. Depending upon the battery level, the beeper may not sound five
times.
(When driven by the dry cells)
If the BHT is driven by dry cells, replace them; if driven by the battery cartridge, recharge or replace it.
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(When driven by the battery cartridge)