Vaisala HMDW80 - Manual (Page 19)

Chapter 3 ________________________________________________________________ Installation
VAISALA ________________________________________________________________________ 17
CHAPTER 3
INSTALLATION
This chapter provides you with information that is intended to help you
install HMDW80 series transmitters.
Selecting Location
When mounting duct model transmitters:
- Avoid installing in a location where condensation may fall on the
sensor inside the duct.
- Position the sensor in the center of the duct.
- Select a site where the transmitter can be installed horizontally, onto
the side of the duct.
When mounting wall model transmitters:
- Select a location that represents well the area of interest.
- Do not install on the ceiling.
- Avoid placing the transmitter near heat and moisture sources, close to
the discharge of the supply air ducts, and in direct sunlight.
When mounting outdoor transmitters:
- Install in a place that receives minimal direct sunlight. In the northern
hemisphere, the North side of the building typically provides a
suitable shaded location.
- Avoid placing the transmitter near windows, air conditioning units, or
other heat and moisture sources such as cooling towers.
- Install the transmitter at least 2.5 m above ground level.