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Test Gas Supply Control for Automatic Calibration,
3 Analyzer Modules,
External Gas Supply
with 1 Solenoid
Figure 8-A-6
8-A-8
To calibrate three analyzer modules connected in series with simplified calibration
procedures:
• Caldos27 with single-point calibration
• Magnos206 with single-point calibration
• Limas11 with calibration cells
• Uras26 with calibration cells
• Oxygen Sensor
The external solenoid is controlled via a digital output on the electronics module
(Digital output DO4 on Digital I/O Module – "Status signals / Externally controlled
calibration" standard function block application).
If the sample components of the individual analyzer modules show cross sensi-
tivities among each other, it must be made sure by appropriate arrangement of
additional solenoid valves that the test gas can be supplied separately to each
analyzer module. With respect to the control of these solenoid valves, it must be
taken into consideration that all analyzer modules are calibrated simultaneously
during automatic calibration.
Chapter 8: Gas Analyzer Calibration
continued
Digital
output
Analyzer
Electronics
module 1
module
System bus
Analyzer
module 2
Analyzer
module 3
42/24-10 EN Rev. 9
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