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Using the Rosemount 470XA
June 2023
2. Go to GC Control → Calibration.
3. Press
4. Press
5. Press
6. To select or clear the Purge stream for 60 seconds check box, do the following:
7. To select a calibration type, do the following:
4.5
Advanced configuration and operation topics
4.5.1
Validation
You can configure the gas chromatograph (GC) to validate an analysis of the calibration
standard (or another stream) to ensure that the analysis is within specified limits.
You can configure the validation for any of the streams, including the calibration stream
(default). You can configure the validation to run automatically at a set time and frequency,
or you can initiate it manually.
In previous generations of GCs, operators ran a daily calibration to verify the correct
operation and to account for changes in measurement on a daily basis. They would
typically configure a calibration run to run for three analysis cycles of the calibration gas;
the calibration run changes the response factors.
92
.
The Start Calibration screen displays.
.
.
The Purge stream for 60 seconds feature allows sample gas to flow through the
sample loop for 60 seconds prior to beginning the first analysis. The feature is
checked by default.
There are two types of calibration:
•
Normal calibration is a manual calibration in which the newly computed
calibration factors are updated to the component data table (CDT) only if the
deviation with previous factors don't exceed limits set in the CDT. This is the
default option.
•
Forced calibration is a manual calibration in which the component data table
for the selected stream is updated with calibration factors even if that data is
outside the acceptable deviations that are listed in the CDT.
a) Press Down to move from the Stream dropdown list to the Purge stream for
60 seconds check box.
b) To select or clear the Purge stream for 60 seconds check box, press
c) If you do not want to select a calibration type, press
The calibration starts.
a) Press Down to move from the Purge stream for 60 seconds check box to the
set of Calibration Type check boxes.
The Normal check box is selected.
b) If you want to select Forced, press Down.
c) Press - (hyphen) to start the calibration run.
Manual
MS-00809-0100-0470
.
.
Emerson.com
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