Calibration
Calibration
4-12
42iQLS Instruction Manual
Thermo Scientific
[NO]
OUT
= Diluted NO concentration at the output manifold, ppm
NO
STD
= No feed concentration
F
NO
= No flow
F
O
= Ozone flow
F
D
= Dilution flow
Use the following procedure to calibrate the NO channel to the NO
calibration gas.
1.
Allow the analyzer to sample the NO calibration gas until the NO,
NO
2
, and NO
x
readings have stabilized.
2.
When the responses stabilize, from the Home Screen, choose
Calibration>Calibrate Span Coefficients>Calibrate NO Span
Coefficient
.
The user sets the span concentration by pressing the Edit NO Span
Concentration button. The Calculated NO Span Coefficient button
will show what the span coefficient will be set to if the Calibrate button
is pressed. Pressing the Calibrate button will save the new NO span
coefficient and calibrate the instrument.
3.
Enter the NO calibration gas concentration using the pushbuttons, and
then press
Calibrate
to calibrate the instrument to the NO calibration
gas.
4.
Record the [NO]
OUT
concentration and the instrument’s response.
Use the following procedure to calibrate the NO
x
channel to the NO
x
calibration gas.
1.
Press the Back button to return to the Calibration menu, and choose
Calibrate NO
x
Span Coefficient
.
2.
Verify that the NO
x
calibration gas concentration is the same as the
NO calibration gas concentration plus any known NO
2
impurity.
The user sets the span concentration by pressing the Edit NO
x
Span
Concentration button. The Calculated NO
x
Span Coefficient button
will show what the span coefficient will be set to if the Calibrate button
Calibrate the NO Channel to the
NO Calibration Gas
Calibrate the NO
x
Channel to the
NO
x
Calibration Gas
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