I have a question regarding calibration of devices, which are used for recording of environmental conditions during calibration.
In NIST Handbook and in ISO/IEC 17025 is written, that environmental conditions have to be included in calibration report.
Unfortunately I haven’t found a statement, if the equipment measuring/recording this environmental conditions must be also calibrated, or if it is only an additional information in calibration report.
Please, could you help me to find, where is defined that these devices has to be also calibrated?
Thanks in advance.