It is recommended to take a manual water level measurement before installing an AquaVent 5 logger, shortly after installation, periodically during your monitoring interval, and at the end of your measurement period. Use these measurements to verify AquaVent 5 readings, and for data adjustments later on. Ensure you take manual readings as close in time as possible to a scheduled AquaVent 5 reading.
To adjust all readings in your AquaVent 5 data file to depth to water below a well casing (d), record a manual water level measurement using a water level meter. This reading should correspond in data and time with an actual AquaVent 5 recording. Use this as a reference datum in the Manual Data Adjustment option in the Software Data Wizard.
The best recommendation is to compare AquaVent 5 readings (A) with a measured depth to water level value (d) (using a Water Level Meter).