Vaisala DEWCAP DM500 Guia do Utilizador descarregar pdf (Página 115)

Chapter 18 _____________________________________________________________ Maintenance

VAISALA ______________________________________________________________________ 113

CHAPTER 18

MAINTENANCE

This chapter provides information that is needed in basic maintenance

of the product.

Cleaning the Sensor

Clean the sensor whenever the system gives a warning of

contamination on the sensor. Cleaning is also strongly recommended

before calibration and adjustment or when there is a reason to believe

that the measurement is unstable or the offset has increased.

Contamination typically causes a positive offset to the measured

dewpoint when there is a liquid phase on the sensor. When measuring

frostpoints, the instability of the measured value increases if the

sensor is dirty, but usually there is no offset.

The sensor is robust and constructed of hard materials. Thus even

frequent periodic cleaning of the sensor can be done without any

concern of sensor wear down.

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Vaisala DEWCAP DM500 Guia do Utilizador Página 115