4.2.2(Cont’d) Zero calibration option

The “Zero” calibration option is selected if the sensor is only being zeroed (this not a complete calibration)

It does not require the application of span gas, as only the sensor’s zero point is adjusted. Ensure that no contaminants are present, if the surrounding air is to be used for Zeroing. If Zero calibration is needed, at step 7 above, select ‘Zero’ using switch 3).

Warning Air movement, drafts and wind can cause dilution of calibration gas flow which can cause an erroneous calibration and inaccurate performance. To avoid this, use a Calibration Cup attached to the bottom of the sensor. The cup doesn’t have to be removed for normal operation. When the cup is in place, inject calibration gas at a rate of 0.5 – 1.0 liter per minute.

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MAN-0076 Rev 05 Millennium II December 07, 2012

Net Safety Monitoring Inc

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Emerson M21, M22 user manual Cont’d Zero calibration option

M22, M21 specifications

The Emerson M21 and M22 are advanced industrial controllers designed to enhance process automation and operational efficiency in various industries. Emerson, a leader in automation technology, introduced these models to meet the growing demands for precision, reliability, and connectivity in today’s fast-paced industrial environments.

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