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Reference Manual
00809-0100-5800
6
Gas calibration
6.1
Required tools
The gas concentrations measured by the analyzer can be validated against a known
sample gas or calibrated to match it by using the following gas calibration procedure.
To calibrate the analyzer, you need the following items:
•
Nitrogen gas of "instrument gas" purity for use as a zero calibration gas
•
Suitable span calibration gases for each gas measured
•
Gas bottle pressure regulators
•
Interconnecting hoses to connect the gas bottles to the analyzer
•
A T-piece and excess flow line
NOTICE
In the case of gases such as H
cylinders, it will usually be measured by the same laser as some other gas. Validating the
other gases measured by the analyzer (particularly any which are measured by the same
laser as H
no need to calibrate the water measurement directly.
If you need to calibrate (e.g., for legal requirements), you can use a water vapor generator
to supply a known concentration of water vapor.
6.2
Main menu
Access the calibration functions through the Main menu
menu, press MENU on either the Gas Sensor Main screen or the Pressure and
Temperature screen, as described in
Rosemount CT5800
O, where it is not normally possible to obtain calibrated gas
2
O) can demonstrate that the system is functioning correctly, meaning there is
2
(Figure
Main
menu.
Gas calibration
September 2019
6-1). To get to the Main
81
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Troubleshooting
