72
Installation, Operation and Maintenance Manual
OXYvisor Optical Oxygen Analyzer
APPENDIX No. 3 - Drift and Sample Rate
A3 - Drift and Sample Rate
Sample Rate - [Menu Structure: Measurement/Sampling Rate]
The sample rate determines how often the measurement will be taken. The rate can be set to take a
measurement every 3 seconds to once every hour. It is beneficial to set the sample rate as slow as possible
to minimize measurement drift between calibrations and extending the life of the sensor. Measurement
drift and sensor life are directly affected by the sample rate due to the photo-bleaching of the measurement
element. Photo-bleaching occurs every time the blue LED light flashes to take a measurement. The factory
recommends a sample rate of every 60 seconds unless the application requires a quicker measurement. A
table is shown here as an example of estimated drift between calibrations as a function of sample rate. Please
note, that this is just an estimation based on common operating conditions.
Table 16 - Drift and Sample Rate Examples