Effect Of Ambient Temperature And Pressure - Pce Instruments Pce-Sc 09 Benutzerhandbuch

5.3

Effect of ambient temperature and pressure

In environments with normal atmospheric pressure, the influence is generally negligible. However,
sound level calibrators including the PCE-SC 09 are dependent on changes in altitude. The
diaphragm generates sound waves within the calibrator which have to work against the
environmental air. When the air at higher altitudes becomes thinner and the atmospheric pressure
decreases, the calibrator generates a lower sound level.
The PCE-SC 09 sound calibrator generates 0.1 dB less every 610 m above zero level. The effects
of the temperature are less severe. The sound level calibrator has a temperature coefficient of 0 ...
0.01 dB/°C.
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