O 3 Span Coefficient - Thermo Scientific 49i Instruction Manual

Operation
Calibration Factors Menu
O Span Coefficient
3
3-20 Model 49i Instruction Manual
O3 BACKGROUND:
O3:
SET BKG TO:
RANGE AVG
The O span coefficient is usually calculated by the instrument processor
3
during calibration. The span coefficient is used to correct the O
and normally have values near 1.000.
The O Span Coefficient screen allows the O
3
manually changed while sampling span gas of known concentration.
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).
The display shows the current O
the display shows the O
being used to correct the O
coefficient value is changed, the current O
also changes. However, no real changes are made to the value stored in
memory until is pressed. Only proposed changes, as indicated by a
question mark prompt, are displayed until
In dual or auto range modes, "High" or "Low" is displayed to indicate the
calibration of the high or low coefficient. The example below shows the
coefficient screen in single mode.
• In the Main Menu, choose Calibration Factors > O
• Use and
• Press to save the new coefficient.
4.4
0.0
INC/DEC
SAVE VALUE
DIAGS ALARM
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concentration reading. The next line of
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span coefficient that is stored in memory and is
3
concentration. Notice that as the span
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concentration reading above
3
to increment or decrement the coefficient value.
reading
3
span coefficient to be
is pressed.
Coef.
3
Thermo Fisher Scientific