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Calibration Pressure
Thermo Fisher Scientific
stored in memory until
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 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 > NO, NO2, or NOx
●
Coef.
NO COEFFICIENT:
NO:
SET COEF TO:
RANGE
AVG
The Calibration Pressure screen reports the reactor pressure at which
current calibration was performed. The screen also allows this value to be
edited by the operator. This value should not be changed unless a complete
manual calibration is being performed. The calibration pressure is set equal
to the reactor pressure at the time of calibration. The acceptable range for
calibration pressure is between 200 and 450 mmHg.
Note Turning the pressure compensation ON and OFF can produce
significant artificial jumps in the apparent sample concentration. If the
pressure compensation feature is to be used, the instrument must be
calibrated with the pressure compensation feature ON. For more
information about calibration, see Chapter 4, "Calibration".
is pressed. Only proposed changes, as
51.4
1.000
INC/DEC
SAVE VALUE
DIAGS ALARM
Model 42i Trace Level Instruction Manual
Operation
Calibration Factors Menu
is pressed.
▲
3-19
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Troubleshooting
