Contents of Box
In
the box you will find:
·
Tendency Barometer consisting of:
Barometer
U-shaped tube with red fluid
Thermometer
tube filled with blue fluid
Tendency
Dial – tracks pressure changes
Hygrometer
– measures relative humidity
·
The User Manual below on this page.
·
Calibration Kit with syringe and plastic tubing.
Note:
Be sure to remove the rubber tube and rubber plug from the top of the
barometer tube.
These
are only present during shipping to prevent spillage of the red fluid.
User Manual
On
December 23, 1818, Alexander Adie, an optician from Edinburgh, received his
patent for an invention: the Sympiesometer.
He named his invention using the Greek words “sumpiesometer”
(pressing together) and “metron” (measure).
His instrument proved to be a reliable weather predictor.
We constructed, according to his patent, a completely new series of very
special weather instruments: The Tendency Barometer
A
Tendency Barometer consists mainly of two parts:
A U-shaped tube (red fluid) and a thermometer (blue fluid).
The red fluid rises or falls according to changes in air pressure.
The U-shaped tube is also influenced by temperature, that is the reason
why the combination with the thermometer is required.
All temperature deviations during the reading of the pressure tendency
will be corrected.
All you need to do is to compare the level of the red fluid to the blue
fluid. The
difference between both fluid levels (use the Celsius scale to take difference
readings) is set with the pointer on the Meteo-tendency scale.
The changes in air pressure can be easily observed and an accurate
forecast made.
Example:
When the red fluid is 6 lines below the blue fluid. -6 (remember, use the
Celsius scale to take the difference) the weather forecast is for Fair Weather.
When the red fluid is 8 lines above the blue, +8, the forecast is Rainy
or Stormy.
When
the red and blue fluid levels are equal, the weather condition is Change.
Red
fluid below the blue fluid, Good Weather (high pressure).
Red
fluid above the blue fluid, Bad Weather (low pressure)
You
can also take actual pressure readings in hPa, which is the equivalent to
millibars. The
pressure level in millibars is printed around the Meteo-tendency dial.
Hygrometer
The
Hygrometer is used to measure the degree of humidity in the air near this unit.
The amount of humidity is measured by transferring the differences in
length from a humidity sensitive material to a pointer on the scale.
A hygrometer should be calibrated at least once per year.
You can do this by soaking a towel with water.
Put the hygrometer for at least 20 minutes on this towel.
The hygrometer should now indicate 97-98%.
If the hygrometer shows some other value, it can be set to 97% on the
back of the hygrometer using a small screwdriver.
Please do not use force when setting the hygrometer!
Barometer
Calibration
As
with all other barometers a tendency barometer has to be set for the local
altitude if your location is more than about 150 feet above sea level.
Check with your town or city hall for your altitude if you don’t know
it.
Calibration
method:
To
calibrate the apparatus, a calibration kit is included.
You will need it now. Refer to the above diagram as needed.
Put
the needle stub onto the syringe if it is not already installed and remove the
protective cover over the needle stub.
Carefully
slide the thin plastic tube over the needle stub.
When
the air pressure is 1013 millibars or 29.92 inches of mercury, remove as much
fluid as needed to make both red and blue fluid level equal with each other.
A difference of 1 dash on the Celsius scale between both fluid levels
represents 0.16
inches of mercury pressure.
(Note: You can find your local air pressure by watching TV
such as The Weather Channel, or going onto the internet to www.weather.com
or other such weather web sites.)
The
tendency barometer is now calibrated
Troubleshooting
|
Problem
|
Solution
|
|
Air
bubble in the left hand red
fluid
|
Use
the thin plastic tube to prick through the air bubble
|
|
Air
bubble in the right hand red fluid
|
Put
the instrument upright in the refrigerator for approx. 1 hour.
The air bubble will disappear. Or, attach the rubber tube and
rubber plug to the end of the open barometer tube. Squeeze the
rubber tube until the gaps are gone, then remove the rubber tube and plug.
|
|
Barometer
not working
Properly
|
You
are at a higher altitude than the one the instrument is calibrated for.
Calibrate
the instrument using the above calibration method.
|
|
Hygrometer
not working properly
|
Calibrate
the hygrometer. (see
hygrometer section)
|
|
In
case of glass breakage.
|
Try
to collect the colored fluid and all pieces of glass in a container. The
red fluid consists of red
pigment in oil, the blue fluid is alcohol. If
the red fluid is spilled, remove it with paper towels.
Rinse the stained places
Immediately with soap and water.
|
|
Air
bubble in blue thermometer fluid
|
Heat
the thermometer tube carefully using a hair dryer on low setting
|
