If you think the device is not measuring correctly, calibration and adjustment is not the first thing to do. Check the following first:
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 www.vaisala.com/calibration.
Generic procedures for on-site calibration and adjustment are provided in this guide:
To verify the measurement accuracy of the probe without disconnecting it from the data logger, compare its readings with a calibrated reference instrument. Doing this at the installation location of the data logger is referred to as a field check. See Field checking using a reference instrument.
To calibrate and adjust the probe using a Vaisala handheld meter and humidity and temperature references, see RH and T calibration and adjustment using HM40 and RH and T calibration and adjustment using MI70.
- To calibrate and adjust the probe and change its stored calibration information using a computer, connect the probe to Vaisala Insight software. See Adjusting measurement using Insight software.