Vaisala Drycap DMT152 Guia do Utilizador descarregar pdf (Página 16)

User's Guide _______________________________________________________________________

14 ___________________________________________________________________ M210865EN-F

Sensor Purge

Sensor purge is also an automatic procedure that minimizes the drift at

the wet end readings of the dewpoint measurement. Sensor purge is

performed once a week or when the power is switched on. The sensor is

heated for several minutes, which will then evaporate all excess

molecules out of the sensor polymer. This, together with the auto-

calibration, results in a very small drift. The measurement output of the

transmitter is frozen to the last measured value for the duration of the

sensor purge.

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