42/24-10 EN Rev. 9 Chapter 8: Gas Analyzer Calibration 8-A-1
Chapter 8 Gas Analyzer Calibration
Section A Principles
Calibration Control
Calibration Control Depending on the gas analyzer version and equipment, there are three methods
for controlling calibration:
• Manual calibration
• Automatic calibration
• Externally controlled calibration
All analyzer modules can be calibrated using any of the three methods.
See Section C, “Notes for Calibrating Analyzer Modules” for details.
Calibration Start • Manual calibration is started manually via the gas analyzer’s display and control
unit.
• Automatic calibration is started at time intervals determined by the internal clock
or by an external control signal or manually via the gas analyzer’s display and
control unit.
• Externally controlled calibration is triggered by an external control signal.
Warm-up Phase Calibration should only be started after the warm-up phase.
Analyzer Module Warm-Up Phase Duration
Caldos25 1.5 hours
Caldos27 Approx. 30 /60 minutes for class 1/ 2 measurement ranges
1)
Limas11 Approx. 2.5 hours
Magnos206 ≤ 1 hour
Magnos27 2 to 4 hours
Uras26 Approx 0.5/2 hours without /with thermostat
Plausibility Test in
Calibration
If during calibration the gas analyzer finds implausible values (e.g. if the span and
zero values are equal), calibration is stopped and an error message is generated.
The values stored after the last calibration remain in effect.
Status Signal The “Maintenance Mode” status signal is set during calibration.
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