Ambient Weather WS-26 Gebruikershandleiding - Pagina 5
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5.5.1 Humidity Calibration
To enter the humidity calibration mode, press and hold the SET/ADJUST and CLEAR/- buttons at
the same time for 5 seconds and the humidity value will begin flashing. Press the [+] button to
increase the humidity and the CLEAR/- button to decrease the humidity reading in 1% increments. To
rapidly increase (or decrease) the humidity reading, press and hold the [+] or CLEAR/- button.
To return the humidity to the actual or uncalibrated measurement, press the ADJUST button.
Once the displayed humidity equals the calibrated source, press and hold the ADJUST button for
three seconds, or wait 15 seconds for timeout, and the humidity value will stop flashing.
Discussion: Humidity is a difficult parameter to measure electronically and drifts over time due to
contamination.
Due to manufacturing tolerances, the humidity is accurate to ± 5%. To improve this accuracy, the
humidity can be calibrated using an accurate source, such as a sling psychrometer:
or one step humidpak calibration kits (reference Section 9). You can also use common table salt,
water and a plastic bag:
https://ambientweather.net/help/how-can-i-test-the-accuracy-of-my-hygrometer/
5.5.2
Temperature Calibration
To enter the temperature calibration mode, press and hold the SET/ADJUST and [+] buttons at the
same time for 5 seconds and the temperature value will begin flashing. Press the [+] button to increase
the temperature and the CLEAR/- button to decrease the temperature reading in 0.1° increments. To
rapidly increase (or decrease) the temperature reading, press and hold the [+] or CLEAR/- button.
To return the temperature to the actual or uncalibrated measurement, press the ADJUST button.
Once the displayed temperature equals the calibrated source, press and hold the ADJUST button for
three seconds, or wait 15 seconds for timeout, and the temperature value will stop flashing.
Discussion: Temperature errors can occur when a sensor is placed too close to a heat source (such
as a computer or TV or in a window).
To calibrate temperature, we recommend a mercury or red spirit (fluid) thermometer. Bi-metal (dial)
and other digital thermometers are not a good source and have their own margin of error.
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