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7. Calibration and adjustment
7.1 Calibration and adjustment overview
Calibration means comparing the measurement output of the device to a known
reference, such as a known environment in a calibration chamber or the output of
a reference instrument. Correcting the reading of the device so that it measures
accurately is referred to as adjustment.
The probe is fully calibrated and adjusted as shipped from the factory. To maintain the
accuracy of the measurement, calibrate and adjust the probe as needed. Typical calibration
interval is one year, but depending on the application it may be necessary to check the
accuracy more frequently.
Vaisala recommends sending the probe regularly to Vaisala for factory calibration. The probe is
calibrated and adjusted at multiple points along its measurement range. Factory calibration
always includes a traceable calibration certificate and adjustment, if needed.
Factory calibration leads to highest accuracy and lowest uncertainty. After factory calibration
the instrument performs as new. For up-to-date information about calibration points and
offering, visit store.vaisala.com.
WARNING!
has not been exposed to dangerous contamination, and is safe to handle
without special precautions.
It is also possible to calibrate and adjust the probe on the field using the Insight PC software or
the Indigo80 handheld indicator.
If you think the device is not measuring correctly, calibration and adjustment is
not the first thing to do. Check the following first:
• Make sure nothing is interfering with the measurement: heat sources,
temperature differences, or condensation.
• Check that there is no moisture on the probe. If the sensor has become wet,
wait for it to dry.
• Always wait for the measurement to stabilize.
7.2 Adjustment points and requirements
You can adjust the humidity measurement in 1 ... 5 points and temperature measurement in 1...2
points, depending on the device that you use for the adjustment. Note the following:
• Humidity adjustment in more than 2 points is only available when you use the Insight
software in Advanced Mode.
When returning a product for calibration or repair, make sure it
Chapter 7 – Calibration and adjustment
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