D6c Set Time and Date
This screen shows you the Manta 2’s opinion on time and date. If you wish to change any of those
values, just type the new value in the appropriate box or click the box at the bottom of the screen to
synchronize the Manta 2 time and date with those of your PC or Amphibian.
E Sensors and Calibrations
How do I know if I need to calibrate?
The simple answer is that frequent calibration will give you better data. The more meticulous
you are with calibration, the better data you will gather. If you are uncertain whether you need
to calibrate, check your sensors against a known sample. If the reading is within the accuracy
specification and/or your accuracy expectations, there is no need to calibrate.
Experience and your program’s accuracy expectations will help determine calibration
frequency for the various sensors. If, for instance, your reservoir discharge is hovering near
the regulatory minimum for dissolved oxygen, you should pay special attention to DO
calibration frequency and technique. On the other hand, if a conductivity accuracy of +/- 10%
is OK, you needn’t calibrate conductivity very often.
If you replace the DO membrane or pH reference, you need to recalibrate regardless.
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