21
Setting Calibrated Temperature
Temperature is measured by a resistive thermal device (RTD) and is subject to electronic va
-
riation.
Temperature errors can also occur when a sensor is placed too close to a heat source (such as
a building structure, the ground or trees).
To calibrate the indoor or outdoor 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. Using a local weather station in your area is also a poor source due
to changes in location, timing (airport weather stations are only updated once per hour) and
possible calibration errors (many official weather stations are not properly installed and calib
-
rated).
Place the sensor in a shaded, controlled environment next to the fluid thermometer, and allow
the sensor to stabilize for 24 hours. Compare this temperature to the fluid thermometer and
adjust the console to match the fluid thermometer.
To calibrate indoor or outdoor temperature, in the Set Mode with indoor or outdoor temperature
flashing, press the + key or MIN/MAX key to increase or decrease the temperature setting (in
increments of 0.1 degC or 0.18 degF) to match the calibrated or known temperature source.
Setting Calibrated Humidity
The display console allows you to calibrate both the indoor and outdoor humidity. 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.
To calibrate indoor humidity, in the Set Mode with indoor humidity flashing, press the + key or
MIN/MAX key to increase or decrease the humidity setting (in increments of 1%) to match the
calibrated or known humidity source. To return the indoor humidity to the measured value,
press and hold the SET key for 3 seconds and the humidity will return to the uncalibrated value.
To calibrate outdoor humidity, in the Set Mode with outdoor humidity flashing, press the + key
or MIN/MAX key to increase or decrease the humidity setting (in increments of 1%) to match
the calibrated or known humidity source. To return the outdoor humidity to the measured va-
lue, press and hold the SET key for 3 seconds and the humidity will return to the uncalibrated
value.
Note: The remote (outdoor) thermo-hygrometer will always display the measured humidity
level and not the calibrated humidity level. Only the console will show the calibrated value.
Note: The dew point calculation is based on the calibrated humidity level.
Summary of Contents for 10029960
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