Thermo Scientific 42i Instruction Manual page 151

Calibrate High NO
Calibrate High NO
Calibrate High NO
Thermo Fisher Scientific
Use the following procedure to calibrate the NO channel to the NO
calibration gas.
1. Connect a source of high NO calibration gas of about 80% of the high
NO full-scale range. Allow the analyzer to sample the high NO
calibration gas until the NO, NO
2. After the responses have stabilized, from the Main Menu, choose
Calibration > Cal Hi NO Coefficient.
The Hi NO field displays the current NO concentration. The Hi NO
Span Conc field is where you enter the high NO calibration gas
concentration.
Use
to increment and decrement the numeric character at the cursor.
3. Press to calculate and save the new high NO coefficient based on
the entered span concentration.
Use the following procedure to calibrate the NO
x
calibration gas.
1. Press to return to the Calibration menu, and choose Cal Hi
NOx Coefficient.
2. Verify that the high NO
the high NO calibration gas concentration plus any known NO
impurity.
Use
to increment and decrement the numeric character at the cursor.
3. Press to calculate and save the new high NO
on the entered span concentration.
4. Press to return to the Run screen.
Use the following procedure to calibrate the NO
2
calibration gas.
Calibration in Dual Range and Auto Range Mode
, and NO
2
to move the cursor left and right and use
calibration gas concentration is the same as
x
to move the cursor left and right and use
Calibration
readings have stabilized.
x
channel to the NO
x x
2
coefficient based
x
channel to the NO
2 2
Model 42i Instruction Manual 4-19