5.3 Durable recording of measurement results

When the gas analytical system has interfaces to submit analytical data, it shall be equipped with a printing device, which prints

• the date and time of measurement,

• the measurement results and their units, and

• the result of self-checking by means of automatic adjustment facilities.

Printed measurement results shall not differ from the measurement results provided by the indicating device.

The minimum height for the figures of the printing device is .

Printouts shall remain readable for the relevant period as required by the national authority, even when exposed to daylight or equivalent lighting.

The legal authority may require that a printing device be provided. It may also require that more information appear on the printed document than requested above, e.g. the result of the volume fraction calculation during a specified period.

The printing device shall not print out the records for the reporting period if the checking facilities provide evidence of errors in excess of the maximum permissible errors, or of failures. The measurement mode shall also be prevented if no paper (or other recording medium) is available in the printing device.