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Water
Barometer Instructions
Water
Barometer:
Atmospheric pressure is usually measured
in inches of mercury, but the water barometer indicates barometric
pressure changes with varying levels of water in the spout. The air
trapped in the bottle by the water maintains a steady pressure.
When high
pressure and good weather are approaching the region, the liquid is
pushed down the spout. When low pressure and bad weather are coming,
the greater pressure trapped inside the bottle causes the liquid in the
spout to rise.
Initial
barometer setup: Fill a basin or container with six inches of cold
water. Fill another basin to the same depth with water as hot as you
can endure putting your hands in. Immerse the whole barometer in the
hot water. When the bubbles quit coming out of the spout, place your
finger over the spout end and remove
the barometer to
the cold water. Release the spout top and water will be drawn into the
spout.
Repeat
these steps until the water level in the barometer is 1/2 inch above
the highest point at which the spout meets the bottle. Allow an hour
for the water to attain room temperature, then turn the barometer
upside down, allowing half the liquid in the spout to pour out. Then
color the water with your choice of liquid food coloring.
Thermometer:
The thermometer has been adjusted in the
factory. If you wish to check the thermometer, place it next to a
well-calibrated thermometer. If it needs correction, adjust it
carefully with a small screwdriver using the hole in the back of the
case at the thermometer needle base.
Hygrometer:
The hygrometer indicates the atmospheric
humidity in %. For the device to work reliably we recommend that it be
recalibrated at least every year. To do this, wrap the instrument in a
moist piece of cloth for 30 minutes. The hygrometer should then
indicate 94-96%. To adjust the calibration, carefully turn the screw in
the back of the
case behind the hygrometer with a small screwdriver.
Note: Results
from use of these instructions is solely at the risk of the
user.Windward Instruments is not responsible for any loss or damage as
a result
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