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Press and hold the
C
or
MAX/MIN/-
key for three seconds to
increase or decrease rapidly.
Press the
ALARM
key to reset current value.
Example
: The calibrated pressure sources measure 28.37 inHg. The
display console pressure reads 28.75 inHg.
Offset = 28.37 - 28.75 = - 0.38 inHg
Relative Pressure Calibration
In the calibration mode, press the
SET
key once, the “REL” symbol will
display at the pressure section, the relative pressure value will flash. (The
default value is 0.00 inHg)
Press the
C
key or
MAX/MIN/-
key to increase or decrease the
relative pressure value (in increments of 0.01 inHg).
Press and hold the
C
or
MAX/MIN/-
key for three seconds to
increase or decrease rapidly.
Press the
ALARM
key to reset current value.
Example
: The calibrated pressure sources measure 25.00
inHg. The display console pressure reads 24.85 inHg.
Offset = 25.00 - 24.85 = 0.15 inHg
Note:
The display console displays two different pressures: absolute
(measured) and relative (corrected to sea-level).
To compare pressure conditions from one location to another,
meteorologists correct the pressure to sea-level conditions. Because the
air pressure decreases as you rise in altitude, the sea-level corrected