PROGRAMMING
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4.7.8 Change DAC Range
The DAC output function allows the user to set the gas
concentration span to be represented by the maximum 2.5V DC
output. This prevents the signal from going off scale during
measurements.
1. “Change DAC range?”
2. Press the
[Y/+]
key, the display shows the gas name:
“VOC?” Press
[N/-]
to have different gas names displayed:
“Benzene?”, “Halocarbon?”, or “Butadiene?”
3. If the
[Y/+]
key is press for the “VOC?”, it will show the
default DAC range “DAC range = 200 ppm?” Press
[N/-]
key to change the range for 2000 ppm, 20 ppm or 200 ppm.
Press
[MODE]
key to exit this sub-menu and move to the
first 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 other
range selection.
