User manual

Chapter 2: Basic Checkout
Important Operating Instructions
Psion Teklogix 8515 Vehicle-Mount Computer User Manual 9
2.4 Important Operating Instructions
Backup Battery
The computer backup battery provides one hour of memory backup. The capacity is reduced
as the operating temperature cools. The table below provides a general outline of battery ca-
pacity based on the operating temperature. Charging of the backup battery will occur
between 0° C and 40° C.
2.5 Switching the 8515 On and Off
• To switch on the 8515, press the [ENTER/ON] key.
To switch off the 8515:
• Press the [BLUE] key, and then press the [ENTER/ON] key.
Turning off the 8515 does not
result in a complete reboot; rather, the unit enters a power-
saving, “suspend” state. When the 8515 is turned on from suspend state, operation resumes
within a few seconds.
Warning: IT IS CRITICAL that this information be reviewed and that any guidelines
applicable to your 8515 be strictly followed.
Note: If the backup battery temperature is less than 10° C and a brown-out occurs,
the display backlight will switch off in order to maintain computer operations.
The backlight will switch back on when external power is restored or the bat-
tery temperature is above 10° C.
Table 2.1 Backup Battery Performance
Temperature Backup Battery Capacity
-20
° C (-4° F) 65%
-10
° C (14° F) 80%
0
° C (32° F) close to 90%
Warning: Do not install the 8515 in such a way that the power cable is bent 90
degrees as this may damage the power cable and power cable strain relief.
Note: If the 8515 is in suspend state, pressing [ENTER/ON] ‘wakes’ the unit from
this state. The screen in which you were working before the computer entered
suspend state is displayed.