Table 1-8. Expected Battery Operating Time at 77
o
F
SENSOR TYPE MINIMUM TIME MAXIMUM TIME
Combustible 1 hour 10 hours
Toxic or oxygen 0.5 hours 24 hours
NOTE: As ambient temperature drops, the expected battery
operating time period decreases. At -4
o
F (-20
o
C),
the times shown in TABLE 1-8 are reduced to 60%.
During battery operation, the Toxgard II unit monitors backup
battery voltage. When voltage is reduced to a level where
continued operation yields unreliable instrument operation and
possible battery damage the instrument LED displays Err6 for 3
seconds and then turns itself OFF until main operating power
is restored.
"
WARNING
The "Fault" relay must be connected to an alarming device to alert the
user the instrument is no longer operational when the above condition
occurs.
NOTE: The Toxgard II battery pack requires up to 24-30
hours of uninterrupted main power to fully charge.
NOTE: Normally, the unit automatically transfers power to the
optional backup battery when the main power is
lost. However, if the user wants to start the unit from
an unpowered state using the battery, press SW6
on the main printed circuit board (FIGURE 1-12).
Banshee Horn Audible Settings
The Banshee Horn can produce several distinctly different
sounds. These sounds and the volume of these sounds can be
adjusted as follows:
1. Disconnect the main operating power from the
Toxgard II Monitor.
2. If the Toxgard II Monitor is equipped with an internal
back-up battery, carefully disconnect the WHITE wire from
the battery (+) terminal.
NOTE: Record the position of the RED and BLACK
wires connecting the horn to TB12 on the
Toxgard II Monitor main pc board. When this
Chapter 1, Set-up
1-30
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