Adjustments And Operation; Rain Sensor - Orbit 57071 Manuel D'utilisation

WTM230900 57071-24 rA.qxd 4/11/03
ENGLISH
Note: The distance that the transmitter and receiver will operate at is
approximately 200 feet line of sight. This distance may be affected by
obstacles such as walls, automobiles, metal siding, etc.
Figure 8: Attaching Sensor/Transmitter to gutter or flat surface
Hints for Mounting:
1. Mount the transmitter in the highest possible position where rain can fall
directly upon the rain sensor.
2. The transmitter mounting location will affect the reset rate, the amount
of time it takes the rain sensor to dry out sufficiently for the sprinkler sys-
tem to reactivate. For example, mounting the rain sensor on a very sunny,
southeastern end of a house may cause the rain sensor to dry out sooner
than desired. Similarly, mounting on the northern end of a building with
constant shade may keep the rain sensor from drying out at all. Some
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experimentation with the "vent ring" (described in the "Adjustments and
Operation" section 4) will usually yield satisfactory results.
3. Always remember the solar cell models need to be mounted in direct,
unobstructed sunlight.
SECTION 4

Adjustments and Operation

Rain Sensor

The rain sensor can keep the irrigation system from starting or continuing
after rainfall quantities of 1/8", 1/4", 1/2", 3/4", or 1". We recommend that
the sensor be set at the 1/8" setting. To adjust to the desired quantity of
rainfall, rotate the cap on the switch housing so that the pins are located
in the proper slots. Do not forcibly twist the cap as this might break the pins.
The time that it takes the rain sensor to reset for normal sprinkler operation
after the rain has stopped is determined by weather conditions (wind, sun-
light, humidity, etc.). These conditions will determine how fast the hygro-
scopic discs dry out, and since the landscape is also experiencing the
same conditions, their respective drying rates will roughly parallel each
other. There is an adjustment capability on the rain sensor that will slow
down the rest rate. By turning the "vent ring" to completely or partially
cover the ventilation holes, the hygroscopic discs will dry more slowly. This
adjustment can compensate for an "overly sunny" installation location or
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