OIML R 144-2 • Test procedures

1.19.1 Test procedure

At reference conditions and at , the warm-up time test to verify compliance with R 144-1, 4.7 shall consist of the following steps:

  1. stabilize the gas analytical system at each temperature;

  2. let the gas analytical system warm up;

  3. immediately after either the manufacturer’s prescribed warm-up period has elapsed or an automatic warm-up lockout has been de-activated, perform a measurement of volume fraction for the components to be determined (with any necessary internal adjustment being performed prior to this measurement). Each of the CGMs recommended in 1.2 shall be used;

  4. at time intervals of 2 min, 5 min and 15 min after warm-up, perform a measurement with each of the CGMs recommended in 1.2 as in step c).

Check that the difference between any of the four measured values in c) and d) above does not exceed the absolute value of the maximum permissible error on initial verification.