Instruction Manual
748441-D
April 2002
Rosemount Analytical Inc. A Division of Emerson Process Management Operation 3-7
Model CAT100
3-3 ENTRY OF SYSTEM PARAMETERS
To enter any or all of the System Parame-
ters, activate the FUNCTION pad until
appears.
Then activate the ENTER pad.
If the Password Code has not already been
entered, the following will appear:
Use the INPUT-CONTROL pads to select
the proper Password Code and then acti-
vate the ENTER pad.
The following System Parameters will ap-
pear in sequence with successive activation
of the ENTER pad. The individual parame-
ters can be changed using the INPUT-
CONTROL pads prior to activating the EN-
TER pad.
a. Pressure
Correction
To eliminate variations in measurement
due to changes in barometric pressure
or sample gas pressure, the current
pressure can be entered expressed in
hPa (mbar) in the range of 800 to 1300
hPa. The concentration values com-
puted by the analyzer will then be cor-
rected to reflect the barometric
pressure or sample gas pressure re-
spectively.
Use the INPUT-CONTROL pads to
change the value and then activate
ENTER.
NOTE
An optional pressure sensor with a
range of 800 – 1100 hPa can be in-
corporated so that the concentration
values will be automatically cor-
rected for barometric pressure. In
this case, it is not possible to enter
the pressure value manually. Any at-
tempt to enter the pressure value
manually will be ignored and the
analyzer will automatically revert to
the measured pressure value.
b. Cross
Compensation
This control permits switching the
cross-compensation feature on and off.
The cross-compensation feature is de-
signed to minimize mutual interference
between the two gases (i.e. CO
2
and
CO) measured by the analyzer.
Entry of 0: Cross-compensation is dis-
abled
Entry of 1: Cross-compensation is en-
abled
Use the INPUT-CONTROL pads to
change the value and then activate
ENTER.
c.
Cross Compensation Calibration
Cross-Compensation correction factors
are automatically determined during
span adjustment if this feature is turned
on. Pure test gases are required for this
operation. Once cross-compensation
corrections have been determined,
span adjustments may be performed
using test gas mixtures.
