PROGRAMMING
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4.7.7 Change DAC / Alarm Output
The UltraRAE monitor allows the user to specify if the
communication / alarm connector is used for DAC output or
alarm output (see Figure 8-1 for connections). The default
setting is DAC signal output. DAC output is normally used to
connect to a chart recorder for plotting a gas concentration
represented by 0-2.5 volts DC. It provides a real-time signal
proportional to concentration. The alarm output is used for an
external alarm.
1. “Change DAC/Alarm output?”
2. Press the
[Y/+]
key, the display shows the current external
output mode: “External output = DAC?”
3. Press the
[Y/+]
key to accept the currently displayed DAC
output mode. Press
[N/-]
to change to alarm output mode:
“External output = Alarm?” Press
[MODE]
key to exit this
sub-menu and move to the next monitor setup sub-menu.
4. If there is any change to the existing selection with
[Y/+]
key pressed, the display shows “Save?” Press the
[Y/+]
key
to accept the new selection and exit this sub-menu. Press
the
[N/-]
key to discard the changes and return to the next
monitor setup sub-menu.