Thermo Scientific 42iQHL, Инструкция по эксплуатации

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Calibration
Calibration in Dual Range and Auto Range Mode
4-18 42iQHL Instruction Manual Thermo Scientific
The user sets the span concentration by pressing the Edit Span
Concentration button. The New Span Coefficient button will show
what the span coefficient will be set to if the Calibrate button is
pressed.
2. Verify that the low NO
x
calibration gas concentration is the same as the
low NO calibration gas concentration plus any known NO
2
impurity.
3. Enter the NO
x
calibration gas concentration using the pushbuttons,
and then press Calibrate to calculate and save the new low range NO
x
span coefficient based on the entered span coefficient.
Use the following procedure to calibrate the NO
2
channel to the NO
2
calibration gas.
1. Adjust the O
3
generator in the GPT system to generate sufficient O
3
to
produce a decrease in the low NO concentration equivalent to about
80% of the URL of the low NO
2
range. The decrease must not exceed
90% of the low NO concentration determined in the “ Calibrate NOx
Low ” procedure.
2. Press the Back button to return to the Calibration menu and choose
Calibrate Low Range NO
2
Span Coefficient .
The user sets the span concentration by pressing the Edit Span
Concentration button. The New NO
2
Span Coefficient button will
show what the span coefficient will be set to if the Calibrate button is
pressed.
3. Set the low NO
2
calibration gas concentration to reflect the sum of the
NO
2
concentration generated by GPT and any NO
2
impurity using the
pushbuttons, and then press Calibrate to calculate and save the new
low range NO
2
span coefficient based on the entered span coefficient.
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
, and NO
x
readings have stabilized.
Calibrate NO
2
Low
Calibrate NO High