Explain The Calibration Procedure Of A Gas Monitor System?

1.	Explain The Calibration Procedure Of A Gas Monitor System?
Answer» Gas sensor loop current or voltage at the sensor HEAD is set as PER the manufacturer’s recommended value. Gas MONITOR zero is adjusted to the instrument air. A test gas with a known quantity of combustion gas (Generally methane 2% by volume) is fed to the sensor and the span is adjusted to read 40% on the monitor scale (refer to the station drawings for the exact settings parameters). The calibration procedure is repeated until the zero and span READS correctly.

Answer»

Gas sensor loop current or voltage at the sensor HEAD is set as PER the manufacturer’s recommended value.
Gas MONITOR zero is adjusted to the instrument air.
A test gas with a known quantity of combustion gas (Generally methane 2% by volume) is fed to the sensor and the span is adjusted to read 40% on the monitor scale (refer to the station drawings for the exact settings parameters).
The calibration procedure is repeated until the zero and span READS correctly.

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