6.2.2.1 One or more thermometric recording instrument(s) shall be used in conjunction with the
temperature sensors to record the temperatures measured in the locations specified in the tests described in
this part of ISO 15883. They may also be used to verify the readings obtained from instruments fitted to the
WD.
6.2.2.2 The thermometric recording instrument(s) shall record the temperature from a minimum of twelve
temperature sensors. The channels may be multiplexed or independent of one another. The data recording
interval for each channel shall not exceed 2,5 s. All data sampled shall be used for the interpretation of results.
6.2.2.3 The scale range shall include 0 °C to 100 °C. The limit of error for the recording instrument,
excluding temperature sensors, between 0 °C and 100 °C shall not exceed ± 0,25 K when tested in an
ambient temperature of (20 ± 3) °C.
The additional error due to changes in environmental temperature shall not exceed 0,04 K/K.
6.2.2.4 For analogical instruments, the minor mark interval shall not exceed 1 K and the chart speed shall
be no less than 15 mm/min. The resolution shall be no less than 0,5 K.
6.2.2.5 Digital instruments shall register and record in increments of no more than 0,1 K.