OIML R 144-1 • Metrological and technical requirements

5.7 Security of the gas analyzer operation

5.7.1

The technical means by which the gas analyzer is adjusted (particularly devices for adjusting the calibration with the CGM and zero-setting) shall be inaccessible to the operator or user. Access shall be possible only by entering a code, or by some other equivalent procedure.

5.7.2

The means used to change from one mode of operation to another shall be inaccessible to the operator or user. Access shall be possible only by entering a code, or by some other equivalent procedure.