Gas Units; No, No - Thermo Scientific 42i Instruction Manual

Gas Units

NO, NO

2
Thermo Fisher Scientific
The Gas Units screen defines how the NO, NO
readings are expressed. Gas units of parts per billion (ppb), parts per
million (ppm), micrograms per cubic meter (μg/m
cubic meter (mg/m
concentration modes are calculated using a standard pressure of 760
mmHg and a standard temperature of 20 °C.
When switching the selected units from ppb or ppm to μg/m
the analog ranges all default to the highest range in that mode. For
example, when switching from mg/m
ppm. Therefore, whenever you change units, you should also check the
range settings.
In the Main Menu, choose Range > Gas Units.
●
Note If the units change from ppb/ppm to μg/m
instrument should be re-calibrated, particularly if the user's standard
temperature is different from 20 °C. A display warning will appear that
ranges will be defaulted and calibration parameters reset.
, and NO
The NO, NO
x
the analog outputs. For example, a NO
Ranges
NO analog output to concentrations between 0 and 50 ppb.
2
The display shows the current NO, NO
the display is used to change the range. The range screen is similar for the
single, dual, and auto range modes. The only difference between the
screens are the words "High" and "Low" to indicate which range is
displayed. The example below shows the NO range screen in single mode.
For more information about the dual and auto range modes, see
Range
this chapter.
3
) are available. The μg/m
GAS UNITS:
CURRENTLY:
SET TO:
AND SET RANGES AND CAL
DEFAULT SETTINGSXXXXXXXXXX

CHANGE VALUE
RANGE AVG DIAGS ALARM
, and NO Ranges screen defines the concentration range of
2 x
Mode", "Dual Range Mode", and
, and NO concentration
2 x
3
), or milligrams per
3 3
and mg/m gas
3
to ppm, all the ranges default to 20
3 3
/mg/m or vice versa, the
▲
PPB
UG/M3 ?
TOX

SAVE
range of 0–50 ppb restricts the
2
, or NO range. The next line of
2 x
"Auto Range Mode" earlier in
Model 42i Instruction Manual
Operation
Range Menu
3 3
or mg/m ,
"Single
3-13