PROGRAMMING
4 - 30
4.8.3 Change Dilution Ratio
The user can insert an optional dilution fitting on the UltraRAE
gas inlet port to dilute the gas sample. In this case the user must
enter a dilution ratio (from 1 to 20) from the programming
menu so that the reading can be compensated to show the actual
concentration of the gas sample with the dilution fitting.
Note:
The ratio number equals 1 means that there is no
dilution. The ratio number equals 2 means that the sample gas
is diluted by a ratio of 2 to 1, i.e. one part of sample gas with
one part of clean air.
1. “Change Dilution Ratio?” is the first sub-menu item.
2. Press the
[Y/+]
key, the display shows the current dilution
ratio: “Dilution Ratio = xx” with the left most digit flashing.
3. Press the
[Y/+]
or
[N/-]
key to increase or decrease the value
of the digit. Press
[MODE]
key momentarily to advance to
the next digit. The flashing digit will move to the next digit
to the right. Repeat this process until both digits of the new
dilution ratio are entered.
4. Press and hold the
[MODE]
key for 1 second to exit the data
entry mode and move to the next sub-menu.
5.
If there is any change to the existing dilution ratio, the
display shows “Save?” Press the
[Y/+]
key to accept the new
ratio and exit the sub-menu. Press the
[N/-]
key to discard the
changes and move to the next sub-menu.
