Chapter 3 Operation
3-11
CO Range
The CO range defines the concentration range of the analog outputs. For example, a CO
range of 0-50 ppm restricts the analog output to concentrations between 0 and 50 ppm.
The second line of the display shows the current CO range. The third line of the display
is used to change the range. The range screen is similar for the single, dual, and
autorange modes as shown below. The only difference between the screens is the word
HIGH or LOW is displayed in Dual or Auto range on the first line to indicate which range
is displayed. For more information about the single, dual, or autorange modes, see
“Single Range Mode,” “Dual Range Mode,” and “Autorange Mode” earlier in this
chapter.
Table 3-1 lists the available preset ranges.
To display the CO range screen:
From the Main Menu choose Range
If in Dual or Auto Range; from the Range menu choose CO Hi Range or CO Lo
Range
To use the CO ranges:
Use the
↑
and
↓
pushbuttons to scroll through the preset ranges
Press
ENTER
to accept a range
Press
MENU
to return to the Range menu
Press
RUN
to return to the Run screen
Range Screens in Single and Dual/Auto Range Modes
RANGE:
CO PPM 50.0
SET TO 100.0?
78 SELECT
HIGH RANGE: DUAL
CO PPM 200.0
SET TO 200.0
78 SELECT
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