Chapter 7 _____________________________________________________ Measuring the DewpointVAISALA _______________________________________________________________________ 41CHAPTER 7MEASURING THE DEWPOINTThis chapter provides instructions on how to conduct dewpointmeasurements with the DM500, and contains additional informationabout the moisture phases.Dewpoint Measurement with DM500Do not assemble the instrument in a location where condensed waterdripping out of the system could cause a hazard, like above high-voltage power supplies.1. After the installation procedures, turn the power on by pressingthe power ON/OFF button .2. Let the system warm up for at least 1 minute before starting themeasurements.3. When the device is ready for use, the following display appears:Display before activating themeasurement mode4. Select the water or air cooling method. Press the soft key ►Measu settings, select by using arrow button Cooling method. SelectWATER or AIR . See page 38, Selecting the cooling method.
