Calibration and adjustment - RFL100

RFL100 User Guide

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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.

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.

Sensors and measurement electronics used by the data logger are fully contained in the replaceable probe. This allows the probe to be calibrated, adjusted, and replaced as needed. Probe serial number and calibration information (calibration date and information text string) are stored in the probe. If the probe is replaced or the calibration information in the probe is updated, RFL100 automatically sends the new information to viewLinc.

The calibration frequency depends on the application and your compliance requirements. Vaisala recommends having the probe calibrated and adjusted once a year by Vaisala Calibration and Repair Services. See

Generic procedures for on-site calibration and adjustment are provided in this guide: