Pressure Compensation; Screen Contrast - Thermo Scientific 42i Instruction Manual

Compensation

Screen Contrast

Thermo Fisher Scientific
Pressure
Pressure compensation provides compensation for any changes to the
instrument's output signal due to reaction chamber pressure variations. The
effects of reaction chamber pressure changes on the analyzer's subsystems
and output have been empirically determined. This empirical data is used
to compensate for any change in reaction chamber pressure. This
compensation can be used even though the Model 42i does not require
pressure compensation for EPA equivalency.
When pressure compensation is on, the first line of the display represents
the current pressure in the reaction chamber. When pressure compensation
is off, the first line of the display shows the factory standard pressure of 200
mmHg.
In the Main Menu, choose Instrument Controls > Pressure
●
Compensation.
The Screen Contrast screen is used to change the contrast of the display.
Intensities between 0 and 100% in increments of 5 are available. Changing
the screen contrast may be necessary if the instrument is operated at
extreme temperatures.
Note The optimal contrast will change with changes in temperature.
Note The optimal contrast will change from one LCD to another. If the
LCD is replaced, the contrast may need to be reset.
Note If the display contrast is not optimal, but the content on the screen is
visible, select Instrument Controls > Screen Contrast and adjust the screen
contrast. If the content on the screen is not visible, use the "set contrast 10"
C-Link command to set the screen contrast to mid-range, then optimize
the contrast. See "contrast levels" in Appendix B,
Commands" for more information on this command.
In the Main Menu, choose Instrument Controls > Screen Contrast.
●

PRESSURE COMPENSATION:

COMP PRES:
CURRENTLY:
SET TO:

TOGGLE VALUE
RANGE AVG DIAGS ALARM
200.0 mmHg
OFF
ON ?
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"C-Link Protocol
Model 42i Instruction Manual
Operation
Instrument Controls Menu
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