Section 50
00-02-0329
01-09-07 -
40 -
Voltage Readings
(E) The internal backup battery, external DC, and
ignition voltage readings are available in the VOLT
menu after SETUP C. These readings are updated
approximately every 4 seconds and are read-only.
Press the [ENTER] key to view each of the readings:
•
- Internal Backup Battery voltage (F)
•
- External DC (G)
•
- Ignition Voltage, peak, if the ignition is
wired to the TTD unit (H)
If Internal Backup Battery, External DC, and CD Ignition
are connected and operational, power for the TTD
annunciator has the following priority:
First - External DC is used unless voltage falls below
9VDC,
Next - CD Ignition is used unless peak voltage falls
below 90VDC,
Next - Internal Backup Battery is used when no other
voltage is present.
NOTE:
The TTD annunciator will operate normally under Internal Backup Battery
power except communication functions and backlight will be disabled.
If Underspeed and/or Loss of Ignition are enabled, the TTD may Shutdown when
CD Ignition is not present. The tolerance for CD Ignition detection ±10%.
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