User Guide

PAMS
Technical Documentation
RAE-3
8. Troubleshooting
Page 8 – 22
Issue 1 06/01
2.5 Backup Battery
Figure 12.
CAUTION
Danger of explosion if the battery is incorrectly
replaced. Replace only with the same or
equivalent type recommended by the
equipment manufacturer.
Discard used batteries according to
the manufacturer’s instructions.
2.5.1 Backup battery troubleshooting
Main power supply to the device must be 3.7 V when used.
Symptom of Backup battery fault is:
Real Time Clock loses the correct time when the main battery is not connected.
The same symptom can also be seen when the backup battery is empty. About
one week is needed to fully charge the backup battery in the device.
Always check the backup battery visually for any leakage or any other visual
defect.
Check that the backup battery is correctly mounted in the device before closing
the cover.
KEEP IN MIND THAT THE BACKUP BATTERY DOES NOT TOLERATE EX-
CESS HEAT. WHENEVER HEAT BLOWER IS USED, FOR EXAMPLE TO RE-
MOVE COMPONENTS, FIRST REMOVE THE BACKUP BATTERY AND
PLACE IT TO ADEQUATE DISTANCE FROM THE WORKING LOCATION.
1. Remove the backup battery.
2. Measure the voltage of the backup battery:
S Normal operation when the voltage is >1.8V.
S Fully charged when voltage is about 3.1V.
3. Connect 3.7V power supply to the device.