Rh Sensor Recalibration - Decagon Devices VP-3 Operating Manual

VP-3 User's Manual
3. RH Sensor
heat at 100 – 105 °C for 10 hours. Then re-hydrate the sensors at
20 – 30°C under ~75% RH for 12 hours. A 75% RH
environment can be conveniently established by sealing the
sensor in a headspace over saturated NaCl prepared as described
above.

RH Sensor Recalibration

Decagon offers a service to recalibrate VP-3 sensors (contact
Decagon Support at support@decagon.com for more
information). Sensors are calibrated at 25%, 50%, and 76% RH.
The calibration values are stored onboard the VP-3 sensor,
allowing the data to be corrected before being output, thus
eliminating the need for calibration during post-processing.
We recommend that VP-3 sensors be re-calibrated every 1 to 2
years under normal use conditions to ensure best possible
accuracy. For safety-critical or especially high accuracy
applications, more frequent recalibration is recommended.
Additionally, if sensors have been poisoned by chemical exposure
and reconditioning fails to restore accurate measurements, the
sensors should be sent back to Decagon for evaluation and
possible recalibration.
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