Is an analyser's calibration data affected by different heights

An analyser's calibration data is not affected by height differences between where it was calibrated (e.g. in the UK) and where it is used (e.g. 600 metres above sea level, in a city like Madrid).

There is no effect from changes in atmospheric pressure on electrochemical sensors as they operate on a volume per volume basis - a part per million is a part per million at any height. The only pressure effect on sensors is caused by pressure pulses/transients or back pressure from the exhaust.