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Press the ALARM button to reset to the current value.
Press the SET button to switch between indoor, outdoor and temperature channels 1 through 8. To exit the
calibration mode at any time, press the SNOOZE/LIGHT button on the top of the display console. If no
operation is performed, the calibration mode will timeout in 30 seconds.
2. Humidity Calibration
In normal mode, press and hold the SET and MIN/MAX/- buttons at the same time for five seconds to enter
the humidity calibration mode. The indoor humidity will begin flashing.
Press the [+] or [-] button to increase or decrease the humidity reading (in increments of 1%). Press and hold
the [+] or [-] button for three seconds to increase or decrease rapidly.
Press the ALARM button to reset current value.
Press the SET button switch to indoor, outdoor and humidity channels 1 through 8. To exit the calibration
mode at any time, press the SNOOZE/LIGHT button on the top of the display console. If no operation is
performed, the calibration mode will timeout in 30 seconds.
Note: Humidity is a difficult parameter to measure accurately and drifts over time. The calibration feature
allows you to zero out this error. To calibrate humidity, you will need an accurate source, such as a sling
psychrometer or Humidipaks One Step Calibration kit.
3. Absolute and Relative Barometer, Wind and Rain Calibration
1. Quick Reference Guide
Press [+] or [-] to adjust the absolute pressure up or
down.
Note that you normally not calibrate absolute
pressure unless you have a specific application
example, measuring air density.
Press [+] or [-] to adjust the relative pressure offset
up or down. See discussion below on how to
calibrate relative pressure based on conditions at a
local airport.
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