Emerson Rosemount CT5100, Reference Manual

Page: 93 / 179

10 Gas calibration
10.1 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
2
O, for which it is not normally possible to obtain calibrated
gas 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
2
O) can demonstrate that the system is functioning correctly, meaning
there is 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.
The validation procedure is essentially the same as the calibration procedure, except that
it does not adjust the analyzer measurements to match the calibration standard.
CAUTION
EQUIPMENT DAMAGE
DO NOT, under any circumstances, press the top two buttons on the display controller
simultaneously. This will override the system code supplied with the analyzer and display
the default program screen for the controller.
This will lock the software controlling the analyzer requiring the analyzer to shut down
externally and restart, risking a possible corruption of the software and loss of the analyzer
operation during the shutdown and restart process.
It is essential that only trained, qualified personnel operate the controls on the analyzer.
Failure to follow may cause warranty invalidation, property damage, and/or personal injury
or death.
Reference Manual Gas calibration
00809-0100-4512 October 2019
Reference Manual 93