Ventus W831 - Page 7

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3. Insert two 2 x UM-3 or “AA” size 1.5V batteries.
4. Use a pin to press the “RESET” key which is in the battery compartment of
thermo-hygro sensors.
5. Replace the latch and mount unit at desired location.
Placement tips:
- The thermo-hygro sensor should be in an area with free air circulation
and sheltered from direct sunlight and other extreme weather conditions. Place
the unit in a shaded area, such as under a roof.
- Use the wall mount and fittings provided if mounting the unit on a vertical
surface.
- Avoid placing the sensor near sources of heat such as chimneys.
- Avoid any areas which collect and radiate heat in the sun, such as metal,
brick or concrete structures, paving, patios and decks.
- Ideally, place the sensor above natural surfaces such as a grassy lawn.
- The international standard height for measurements of air temperature is
at 1.25m (4 ft) above ground level.
Setting up the Rain Sensor
1. Unlock the funnel-shaped top of the rain sensor by turning both knobs on the
sides of the rain sensor in an anti-clockwise direction.
2. Lift the top off the base and insert two 2 x UM-3 or “AA” size 1.5V batteries into
the battery holder.
3. Replace the lid and secure into place by turning the knobs clockwise.
4. Place the rain sensor in a location such that precipitation can fall directly into
the sensor, ideally 2-3 ft above the ground. It may be secured into place by using
the four screws provided.
5. The sensor must be accurately level for optimum performance. To check if the
sensor is level, remove the lid and check if the ball bearing inside is at the
midpoint of the leveler. Additionally, a bubble level or carpenter’s level may be
used.
6. Attach the protective screen onto the top of the lid. The screen will prevent any
debris entering the sensor.
Placement tips:
- The rain sensor should be placed in an open area away from walls,
fences, trees and other coverings which may either reduce the amount of rainfall
into the sensor, deflect the entry of wind-blown rain, or create extra precipitation
runoff. Trees and rooftops may also be sources of pollen and debris.
- To avoid rain shadow effects, place the sensor at a horizontal distance