214
AO2000
CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B
Manual calibration
Definition
Manual calibration means: Zero and span are calibrated separately by press-
ing the gas analyzer display and control unit softkeys.
Test gas infeed
The test gas supply can be started by activating a multiple-way ball valve or
solenoid valve.
If the analyzer module is assigned to a pneumatic module and the latter is
fitted with a single solenoid valve to control the test gas supply (see follow-
ing Figure), the zero gas and span gas must be fed to the zero gas inlet (NG).
This also applies if an external solenoid valve is used and controlled via a
digital output.
The pump status (on/off during manual calibration) matches the setting for
automatic calibration (see page 227).
Example
Test gas connection for Caldos27 with single-point calibration, Magnos206
with single-point calibration, Magnos28 with single-point calibration,
Limas11 IR, Limas21 UV and Limas21 HW with calibration cells, Uras26 with
calibration cells with flow monitoring as option, e.g. for flowing reference
gas or purge gas (external needle valve required):
O
2
P
MG
NG
E
c
opt.
Pneumatikmodul
MG
Sample gas inlet
NG
Zero gas inlet
Flow Flow
monitoring
O
2
Oxygen
sensor
P
Pressure sensor in analyzer module
c/
E
Analyzer
Dew point
The dew point of the test gases must be approximately the same as the dew
point of the sample gas.
Analyzer modules with multiple detectors
In the case of analyzer modules with several detectors (e.g. Uras26) each
detector should be calibrated sequentially.
