Note:
The measured humidity range is between 10 and 99%. Humidity cannot be accurately measured outside of this
range. Thus, the humidity cannot be calibrated below 10% or above 99%.
The purpose of calibration is to fine tune or correct for any sensor error associated with the devices margin of error. The
measurement can be adjusted from the console to calibrate to a known source.
Calibration is only useful if you have a known calibrated source you can compare it against, and is optional. This section
discusses practices, procedures and sources for sensor calibration to reduce manufacturing and degradation errors. Do not
compare your readings obtained from sources such as the internet, radio, television or newspapers. They are in a different
location and typically update once per hour.
The purpose of your weather station is to measure conditions of your surroundings, which vary significantly from
location to location.
The FT0851 supports up to three remote sensors. Each of the three sensors can be calibrated.
5.9.1
Temperature
Calibration
In normal mode, press and hold the
SET
and
C/F(WiFi)
keys at the same time for five seconds to enter the temperature
calibration mode. The indoor temperature will begin flashing.
Press the [+] or [-] key to increase or decrease the temperature reading (in increments of 0.1). Press and hold the [+] or [-]
key for three seconds to increase or decrease rapidly.
Press the
ALARM
key to reset current value.
Press the
SET
key switch to outdoor temperature channel (1through 3). 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.
5.9.2
Setting
Calibrated
Humidity
In normal mode, press and hold the
SET
and
C
keys at the same time for five seconds to enter the humidity
calibration mode. The indoor humidity will begin flashing.
Press the [+] or [-] key to increase or decrease the humidity reading (in increments of 1%). Press and hold the [+] or [-]
key for three seconds to increase or decrease rapidly.
Press the
ALARM
key to reset current value.
Press the
SET
key switch to outdoor humidity channel (1through 3). 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.
