Co Coefficient; O Background - Thermo Scientific 48i Instruction Manual

Operation
Calibration Factors Menu

CO Coefficient

O Background
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3-18 Model 48i Instruction Manual
CO BACKGROUND:
CO:
SET BKG TO:
RANGE AVG
The CO span coefficient is usually calculated by the instrument processor
during calibration. The span coefficients are used to correct the CO
readings and normally has a value near 1.000.
The CO Coefficient screen enables the CO span coefficient to be manually
changed while sampling span gas of known concentration.
The display shows the current CO concentration reading. The next line of
the display shows the CO span coefficient that is stored in memory and is
being used to correct the CO concentration. Notice that as the span
coefficient value is changed, the current CO concentration reading above
also changes. However, no real changes are made until
In dual or auto range modes, "HIGH" or "LOW" is displayed to indicate
the calibration of the high or low coefficient. The following example shows
the coefficient screen in dual/auto range mode.
Note The concentration value will show "ERROR" if the measured
concentration is not a valid span value (either higher than the selected
range, or 0 or lower). ▲
In the Main Menu, choose Calibration Factors > Hi Coef.
●
HIGH CO COEFFICIENT:
HIGH CO:
SET COEF TO:
RANGE AVG
The O Background screen is used to perform a manual zero calibration of
2
the oxygen sensor. Before performing a zero calibration, allow the analyzer
to sample nitrogen until stable readings are obtained. The first line of the
display shows the current O
the O background correction that is stored in memory. The O
2
15.80
0.00 ?

INC/DEC
SAVE VALUE
DIAGS ALARM
15.80
1.000
 INC/DEC
SAVE VALUE
DIAGS ALARM
reading. The second line of the display shows
2
is pressed.
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