Thermo Scientific 42iQD, Инструкция по эксплуатации

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Calibration
Calibration
4-12 42iQD Instruction Manual Thermo Scientific
Use the following procedure to calibrate the NO channel to the NO
calibration gas.
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
is pressed. Pressing the Calibrate button will save the new NO
x
span
coefficient and calibrate the instrument.
3. Enter the NO
x
calibration gas concentration using the pushbuttons,
and then press
Calibrate
to calibrate the instrument to the NO
x
calibration gas.
The exact NO
x
concentration is calculated from:
F
+
F
+
F
) ]
NO
[ + ] [NO ( x
F
=
]
NO
[
D O NO
IMP
2
STD
NO
OUT
x
Where:
[NO
x
]
OUT
= diluted NO
x
concentration at the output manifold, ppm
[NO
2
]
IMP
= concentration of NO
2
impurity in the standard NO cylinder, ppm
4. Record the NO
x
concentration and the analyzer's NO
x
response.
Use the following procedures to prepare the NO
x
calibration curves.
1. Generate several additional NO
x
concentrations by decreasing F
NO
or
increasing F
D
.
2. For each concentration generated, calculate the exact NO
x
concentrations using the above equations for [NO
x
]
OUT
.
Calibrate the NO
x
Channel to the
NO
x
Calibration Gas
Preparing NO
x
Calibration Curves