ECOWITT HP2553, Operation Manual

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To adjust the parameter, press to scroll to the parameter you wish to
change. Press to highlight the sign (positive vs. negative, if applicable)
and significant digit. Press or to change the calibrated value.
Parameter Type of
Calibration
Default Typical Calibration Source
Temperature Offset Current
Value
Red Spirit or Mercury Thermometer (1)
Humidity Offset Current
Value
Sling Psychrometer (2)
ABS
Barometer
Offset Current
Value
Calibrated laboratory grade barometer
REL
Barometer
Offset Current
Value
Local airport (3)
Wind
Direction
Offset Current
Value
GPS, Compass (4)
Solar
Radiation
Gain 1.00 Calibrated laboratory grade solar radiation
sensor
1 w/m 2 Gain 126.7
lux
Solar radiation conversion from lux to
w/m 2 for wavelength correction (5)
Wind Gain 1.00 Calibrated laboratory grade wind meter (6)
Rain Gain 1.00 Sight glass rain gauge with an aperture of
at least 4” (7)
Daily Rain Offset Current
Value
Apply an offset if the weather station was
not operating for the entire day.
Weekly
Rain
Offset Current
Value
Apply an offset if the weather station was
not operating for the entire week.
Monthly
Rain
Offset Current
Value
Apply an offset if the weather station was
not operating for the entire month.
Yearly Rain Offset Current
Value
Apply an offset if the weather station was
not operating for the entire year.
(1) Temperature errors can occur when a sensor is placed too close to a
heat source (such as a building structure, the ground or trees).
To calibrate temperature, we recommend a mercury or red spirit
(fluid) thermometer. Bi-metal (dial) and digital thermometers (from