Calibration and adjustment overview - INDIGO300

Indigo300 User Guide

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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.

Vaisala recommends sending the probe connected to the transmitter 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. You can also send the transmitter to Vaisala for calibrating and adjusting the transmitter's analog output channels.

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

WARNING When returning a product for calibration or repair, make sure it has not been exposed to dangerous contamination, and is safe to handle without special precautions.

It is also possible to adjust the probe and the transmitter's analog output channels on the field using the Insight 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.