Davis Instruments Energy EnviroMonitor, Руководство пользователя

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Barometric Pressure
Energy EnviroMonitor Manual Page 37
Selecting Units of Measure
To select the desired unit of measure, simply press UNITS while viewing the
current barometric pressure. As you press UNITS, the Energy EM cycles
between in, mm, and hPa.
T
YPICAL
U
NITS OF
M
EASURE
Entering Barometric Pressure
Because atmospheric pressure varies with both altitude and local weather con-
ditions, you must enter the current barometric pressure for your location. Wait
at least one hour after powering the Energy EM (to allow the circuit a chance to
stabilize) before you enter barometric pressure. Once the barometric pressure is
set, the Energy EM will calculate and display the correct barometric pressure
until the unit is moved to a different altitude or power is interrupted.
1. Determine the current barometric pressure.
Many TV and radio weather reports carry this information. Or you may call
your local airport control tower.
2. Press BAR to display current barometric pressure.
3. Press and hold down ENTER until the barometric pressure reading stops flashing.
At first, the entire barometric pressure reading will flash as a warning. After
four seconds the Energy EM will revert to normal entry mode (i.e., only one
digit flashing).
4. Use ENTER to set the correct barometric pressure.
See “Using the Enter Key” on page 15 for instructions on using ENTER.
5. When finished setting the barometric pressure, press any function key to exit.
The Energy EM saves the barometric pressure reading.
Alarms
You may set a special barometric pressure alarm which will alert you to
changes in the barometric pressure. For information on displaying, setting, and
clearing alarms, see “Alarms” starting on page 46.