User manual

Thus, your absolute pressure may read 28.62 inHg (969 mb) at an altitude of 1000 feet (305 m), but

the relative pressure is 30.00 inHg (1016 mb).

The standard sea-level pressure is 29.92 in Hg (1013 mb). This is the average sea-level pressure

around the world. Relative pressure measurements greater than 29.92 inHg (1013 mb) are

considered high pressure and relative pressure measurements less than 29.92 inHg are considered low

pressure.

To determine the relative pressure for your location, locate an official reporting station near you (the

internet is best source for real time barometer conditions, such as Weather.com or Wunderground.com),

and set your weather station to match the official reporting station.

Press the menu key to enter the Pressure Mode. You can skip over any setting by selecting the enter

key.

Figure 15

1. Relative vs. Absolute Pressure Display. Press the up key or down key to alternate the

display between relative (rel) pressure and absolute (abs) pressure.

2. Pressure Units. Press the enter key to set the pressure units. The pressure units will begin

flashing.

Press the up key or down key to alternate the display unit between hPa, inHg and mmHg.

3. Relative Pressure Calibration. When Absolute (abs) pressure is selected, this step will be

skipped.

Press the enter key to set the relative pressure calibration. The relative pressure will flash.

Press the up key or down key to change the value.

4. Pressure High Alarm. Press the enter key to set the pressure high alarm function. Pressure

and HI AL (high alarm) icon will flash.

Press the up key or down key to change the value.

Press the ON/OFF key to select the alarm on or off (if the alarm is enabled, the alarm icon

will be turned on).

5. Pressure Low Alarm. Press the enter key to set the pressure low alarm function. Pressure

and LO AL (high alarm) icon will flash.