Emerson Rosemount CT5800, Manual

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5 Verifying gas concentrations
5.1 Verification
Verification flows the known gas concentration through the analyzer and gives you a
display of the measurement, the cylinder value, and the difference between the two. You
can use verification to confirm that the analyzer is within tolerance. If it is out of tolerance,
perform a calibration (see
Calibration ).
5.1.1 Zero verification
Zero verification confirms that when no sample gas is flowing through the analyzer, the
gas concentrations measured by the instrument are zero. To zero verify, compare the
analyzer measurements to a known sample gas using the following procedure:
Procedure
1. Refer to Figure 4-8 . Using and , select
GAS SERVICE
.
2. Press .
The
Select gas
screen ( Figure 5-1 ) opens.
Figure 5-1: Select gas Screen
3. Use and to move the cursor until the gas that you wish to zero verify is
selected. Press .
The Select Type screen ( Figure 5-2 ) opens.
Reference Manual Verifying gas concentrations
00809-0100-5800 September 2019
Rosemount CT5800 71