User manual

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Selection ? 2
Press any key to pause/continue display, <X> to exit.
RTC: 11/02/2006 11:53:59 WDC: 11/02/2006 11:53:58 10.8 Vb 0 mA
RTC: 11/02/2006 11:54:00 WDC: 11/02/2006 11:53:59 10.8 Vb 1 mA
RTC: 11/02/2006 11:54:01 WDC: 11/02/2006 11:54:00 10.8 Vb 1 mA
Figure 7-6: Diagnostics
The battery voltage provides information about the battery. A reading above 11 V
indicates a new battery. After the initial high readings, the battery voltage will remain near
10.8 V until ~90% of the available energy in the battery has been used. Battery voltage near 10.8
V and motor current values near 0mA indicate proper functioning of the sensing circuits on the
motherboard, functioning of the analog-to-digital converter chip on the TT8v2, and operation of
the SPI bus.
The steady advance of both clocks indicates that they are working. It is unnecessary to
precisely synchronize the clocks (a one second offset is typical). An accurate and advancing
WDC also indicates that the TT8v2 SPI bus, a critical communications link used by the 68332
CPU to communicate with the watchdog and other devices, is functioning.
IMPORTANT
A reading below 10.0 V indicates that at least 90% of the lithium battery capacity is used and
the battery should be replaced before deployment. A battery voltage below 7.5 V indicates all
available battery energy is used.
Low battery output voltage triggers operator warning messages. If battery output of the
lithium battery is below 10.0 V, a caution message displays during the exit from Diagnostics
suggesting battery replacement before deployment.
Battery voltage is abnormally low. Check/replace
main battery pack before deploying system.
Press any key to continue.
Figure 7-7: Low Battery Voltage
If the output of the lithium battery is below 7.5 V, a warning message and a single status
line displays. Diagnostics automatically terminates and returns to the Main Menu.
7-7