PME Revisits Ongoing Lahaina Research with Dr. Andrea Kealoha
June 12, 2024
Optimal precision can be achieved from anywhere with the Field Calibration Adjustment for miniDOT® and miniDOT® Clear Loggers. Our team understands the rigorous and often remote locations where our loggers are utilized. Retrieving loggers, and data and verifying optical sensor accuracy is essential to successful data collection. We have developed a simple process that allows researchers to easily measure, analyze and update the optical sensor accuracy in the field.
Whereas in-house recalibration can take time away from your data collection, field calibration offers a solution to many of the issues that in-house calibration addresses. With field calibration adjustment, you can perform many of the same adjustments as our PME engineering team. Recalibration involves examining the sensor at varying points of oxygen and temperature over the entire sensing range of 0 to 35 degrees C and 0 to 150% dissolved oxygen saturation. The sensor is exposed to each point and based on measurements collected, a mathematical equation is created that then allows the sensor to record the proper value at each of the varying points and points in between.
Field Calibration Adjustment is based on PME’s knowledge that all calibration points in each sensor tend to change the same percentage over time. By measuring the percentage of change of one calibration point, we can conclude all other points have changed the same amount. The miniDOT® Logger and miniDOT® Clear Logger software change the calibration mathematics within the sensor so that the calibration point change percentage of one point is applied to change all the other points by the same percentage.
There are several benefits to field calibration, including:
- the extension of usability for the logger
- improved optical accuracy
- minimization of time that loggers would be out of the field for in-house recalibration
- the ability for multiple loggers to be adjusted at once
This process can now be performed in the field by PME customers and researchers. Follow the link below to complete the form to download the field calibration guide.
