Davis Instruments DWW6320 User Manual
Choosing a Location for the Wireless Temperature Station
Page 7
Consider the following factors as you choose a location for your temperature
station:
station:
✦
Place the sensor in a position where it will not be in direct sunlight and where it
will have limited exposure to reflected sunlight.
will have limited exposure to reflected sunlight.
If possible, place the sensor at least 5' (1.5 m) from any surface which is
exposed to direct sunlight.
exposed to direct sunlight.
✦
Limit the sensor’s exposure to night sky.
If you are unsure about a location’s exposure to the night sky, check for
dew at that location on a morning with light dew. If the area is dry, the
location should work well.
dew at that location on a morning with light dew. If the area is dry, the
location should work well.
✦
Place the sensor at least 10' (3 m) away from lights or lamps.
✦
Keep the sensor and its cable away from AC power lines.
Do not run the sensor cable parallel to house wiring. Mount the sensor at
least 30' (9 m) from high-voltage power lines and transformers.
least 30' (9 m) from high-voltage power lines and transformers.
✦
Try not to run sensor cable across large metal objects such as aluminum siding.
✦
For air temperature, use a cable tie, cable clip, or electrical tape to attach the
cable to a building, post, pipe or other surface (keep the sensor itself away from
the building’s surface.)
cable to a building, post, pipe or other surface (keep the sensor itself away from
the building’s surface.)
✦
For soil temperature, bury the sensor at the depth you choose. Where the cable
runs along the ground, use metal or plastic conduits to protect the cable from
rodents.
runs along the ground, use metal or plastic conduits to protect the cable from
rodents.
✦
For water temperature, position the sensor as deep as you like. If the cable runs
along the ground, use metal or plastic conduits to protect the cable from rodents.
along the ground, use metal or plastic conduits to protect the cable from rodents.
The Radiation Shield #7714 provides additional protection for the sensor.
Range of Wireless Transmission
The range of wireless transmission depends on many factors. For the best
reception, position the transmitter shelter and your console/receiver as close
together as possible.
reception, position the transmitter shelter and your console/receiver as close
together as possible.
Range is up to 800' (250 m) in the line of sight, under optimal conditions. Typi-
cal range under most conditions is 150' to 500' (45 to 150 m), but this may be
reduced by walls, ceilings, trees, or foliage. Radio-frequency interference (RF)
can also reduce transmission distance. Cordless phones and “ham” radios are
common examples of RF interference.
cal range under most conditions is 150' to 500' (45 to 150 m), but this may be
reduced by walls, ceilings, trees, or foliage. Radio-frequency interference (RF)
can also reduce transmission distance. Cordless phones and “ham” radios are
common examples of RF interference.
A metal roof or other large metal structure can interfere with the signal (alumi-
num siding, a furnace with metal ducts, and your refrigerator are examples).
Sometimes transmission between wireless units is obscured by something you
cannot identify, or by some obstacle that you can’t work around. If necessary,
consider using Wireless Repeater #7624 or #7625 to strengthen the signal or
increase the distance between the transmitter and the console/receiver.
num siding, a furnace with metal ducts, and your refrigerator are examples).
Sometimes transmission between wireless units is obscured by something you
cannot identify, or by some obstacle that you can’t work around. If necessary,
consider using Wireless Repeater #7624 or #7625 to strengthen the signal or
increase the distance between the transmitter and the console/receiver.
Wireless Temp Page 7 Thursday, November 30, 2000 9:55 AM