Product: All HOBO MX2001 Bluetooth Water Level loggers
Mobile device platform: Android only
HOBOmobile version: any Android version prior to version 1.4.3 (released April 11, 2017)
Launch parameters used: On Date / Time (delayed start), and/or Wrap When Full
May 18, 2017
Dear Onset Customer,
If you have launched a HOBO MX2001 Bluetooth Water Level Logger with an Android device running any version of HOBOmobile prior to version 1.4.3, please read this important notification regarding two technical issues. One or both of these issues may have affected the data you collected:
If your MX2001 was launched with delayed start (On Date/Time), and you input a reference water level at the time of configuration, the reference water level will be incorrectly changed to the level present at the first logged data point (at the time of delayed start, versus the level present when the logger was configured). If the water level changed between the launch time and the time of the first logged data point at the delayed start, the resulting water level data will be off by the amount of that change.
If you programmed your logger to Wrap When Full, and the data wrapped, the reference water level will be incorrectly changed to the level present at the first data point in the file, versus when the reference reading was taken. The differential pressure is always correct, but the water level values will be off by the difference between the original reference level entered and whatever the level was at the time of the delayed start, and/or at the time of the first data point in the file.
Both of these issues have been corrected in HOBOmobile Android release 1.4.3., released April 11, 2017.
What you need to do:
Please be sure you are running the most current version of HOBOmobile on your Android device. Any MX2001 loggers launched with previous versions of HOBOmobile must be re-launched with HOBOmobile 1.4.3 to correct this issue.
It is a recommended best practice to take manual reference level measurements at the time of launch and at the time of extraction (and more often, if possible). If you took manual reference level measurements during deployment, there may be a way to use that manual measurement to correct the data.
We sincerely apologize for any inconvenience this issue may have caused. If you have additional questions or if we can help, please contact Onset Technical Support.