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) and micrograms
per cubic meter (μg/m
calculated using a standard pressure of 760 mmHg and a standard
temperature of 20 °C.
When switching from ppb to μg/m
highest range in that mode. For example, when switching from μg/m
ppb, all the ranges default to 200 ppb. 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 to μg/m
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" or "Low" displayed 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
2
3
gas concentration mode is
3 , the analog ranges all default to the
3 or vice versa, the instrument
▲
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 Trace Level Instruction Manual
Operation
Range Menu
concentration
x
3
to
"Single
3-13