700 CLD / O2
5-04-2017
37
NO/NO
x
/NO
2
Mode
→
→
The NO/NO
x
/NO
2
mode activates the “sample and hold” feature which allows the
analyzer to automatically cycle between NO and NO
x
measurement.
To change to the
NO/NO
x
/NO
2
mode, press
from the Measure Mode menu. The current measuring
mode (cycle) is indicated above the analyzer range.
Example above: NO.
The cycle times of the sample read are set on the
NO/NO
x
/NO
2
Mode Times screen
. All
NO and NOx readings are displayed as averaged values.
The cycle begins with the NO reading. When the NO reading is completed, the analyzer
switches to the NO
x
mode (through the converter). When the NO
x
cycle is completed, the
analyzer updates the averaged NO and NO
x
values on the screen and the analog outputs.
At that point, the difference between the averaged value of NO and NO
x
is calculated as
the NO
2
concentration.
The cycle continues to repeat.
For advanced calibration and operation in NO/NOx/NOx mode, see
NOx Correction
Factors
.