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an accurate source, such as a sling psychrometer or
Humidipaks One Step Calibration kit.
9.3 Calibration of Sensors Mode
In normal mode, press and hold the
SET
and
ALARM
keys at
the same time for five seconds to enter the pressure, wind gust,
rainfall and sunlight calibration mode. The letter “CAL” will
appear at the bottom of the screen.
Press the
SET
key to skip over a parameter to the next.
Absolute Pressure Calibration
In the calibration mode, the “ABS” symbol will display at the
pressure section, the absolute pressure value will flash. (The
default value is 0.00 inHg)
Press the
C
key or
MAX/MIN/-
key to increase or
decrease the absolute 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 28.37
inHg. The display console pressure reads 28.75 inHg.
Offset = 28.37 - 28.75 = - 0.38 inHg
