Calibration Factors Menu; No And No X Backgrounds - Thermo Scientific 42i Instruction Manual

Calibration Factors
NO and NO Backgrounds
x
Thermo Fisher Scientific
Calibration factors are used to correct the NO, NO
concentration readings that the instrument generates using its own internal
Menu
calibration data. The Calibration Factors menu displays the calibration
factors. The screens below show the calibration factors menu in single
mode and dual/auto range modes. The only difference between the screens
are the words "HI" and "LO" to indicate which range is displayed.
Normally, the calibration factors are calculated automatically using the
functions described in "Calibration" menu later in this chapter. However,
the calibration factors can also be set manually using the functions in this
menu.
In the Main Menu, choose Calibration Factors.
●
CALIBRATION FACTORS:
>NO BKG
NOx BKG
NO COEF
NO2 COEF
NOx COEF
RANGE AVG DIAGS ALARM
RESET USER CAL DEFAULTS
The NO and NO
calibration. The NO background is the amount of signal read by the
analyzer in the NO channel while sampling zero air. The NO
is the amount of signal read by the analyzer in the NO
sampling zero air. Although the background is expressed in terms of
concentration, the background signal is actually the combination of
electrical offsets, PMT dark currents, and trace substances undergoing
chemiluminescence. Before the analyzer sets the NO and NO
zero, it stores these values as the NO and NO
respectively. The NO
AVERAGING TIME:
CURRENTLY:
SET TO:

CHANGE VALUE

SAVE VALUE
RANGE AVG DIAGS ALARM
0.0
0.0
1.000
1.000

1.000
background corrections are determined during zero
x
background correction is determined from the NO
2
30 SEC
10 SEC ?
, and NO
2
CALIBRATION FACTORS:
>NO BKG
NOx BKG
HI NO COEF
HI NO2 COEF
HI NOx COEF
RANGE AVG DIAGS ALARM
LO NO COEF
LO NO2 COEF
LO NOx COEF
RESET USER CAL DEFAULTS
background corrections,
x
Model 42i Instruction Manual
Operation

Calibration Factors Menu

x
0.0
0.0
1.000
1.000

1.000
1.000
1.000
1.000
background
x
channel while
x
readings to
x
3-17