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 again, the “REL”
symbol will display at the pressure section, the relative
pressure value will flash. (The default value is 0.00 inHg)
Press the CHANNEL/+ key or MAX/MIN/- key to increase or
decrease the relative pressure value (in increments of 0.01
inHg).
Press and hold the CHANNEL/+ 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
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