Bartec HYGROPHIL H 4230-10 A Series, Руководство по эксплуатации

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Maintenance
96
Operating Instructions HYGROPHIL® H 4230-10 Serie A BA 030520
6.12 Reference and zero point control
(EN15267-3)
The comparative measurements for the reference and zero point of the
instrument should be carried out with suitable calibrated humidity
transmitters in the following ranges:
Zero point:
2,0 … 3,0 VOL%
Reference point
30 … 36 VOL%
The measurements of the zero point should be carried out in the range
around 2 VOL%, as here better results are achieved when defining the
device characteristic. The meter determines the dew point DT and uses this
to calculate the volume fraction H2O VOL%. The relative error increases
with measurements close to 0 VOL% due to the measurement and
calculation method.