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Chapter 2: Basic Checkout
Important Operating Instructions
8 Psion Teklogix 8515 Vehicle-Mount Computer User Manual
2.3 Important Operating Instructions
Backup Battery
The vehicle-mount 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 capacity based on the operating temperature. Charging of the backup battery will
occur between 0° C and 40° C.
2.4 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 vehicle-mount 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 vehicle-mount opera-
tions. The backlight will switch back on when external power is restored or
the battery temperature is above 10° C.
Table 2.1 Backup Battery Perf ormance
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.