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Operation
Calibration
Thermo Scientific
42iQD Instruction Manual
3-11
The Calibrate NO
x
Background screen is used to calibrate the instrument
zero background. Before making an adjustment, be sure the analyzer
samples zero air for at least 5 minutes.
It is important to note the averaging time when calibrating. The longer the
averaging time the more precise the calibration results. To achieve
maximum precision, allow the instrument to stabilize each time input gas is
changed and set the averaging time to 300-second averaging.
Home Screen>Calibration>Calibrate NO
x
Background
The Calibrate Background screen contains the following information:
●
Target NO
x
Concentration:
Read only. Displays what the NO
x
concentration value will become when the calibrate button is pressed.
●
Current NO
x
Concentration:
Read only. Displays what the current NO
x
concentration is.
●
Current NO
x
Background:
Read only. Displays what the current user-set
NO
x
background is.
●
Calculated NO
x
Background:
Read only. Displays what the user-set NO
x
background will become when the calibrate button is pressed.
●
Calibrate:
When pressed, updates the background value, making the
concentration go to zero.
Calibrate NO
x
Background
Summary of Contents for 42iQD
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