In-Situ Win-Situ 4 / Pocket-Situ 4 Operators Manual - Manual (Page 48)

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3. Measurement Schedule
The available schedules depend on your device’s firmware and the
parameters selected for inclusion in the test. This list is a quick overview.
Additional details are given in Appendix B.
3a Linear. All measurements are evenly spaced at a user-specified
interval (prompted next), and all measurements are stored in the
device memory. This is the software’s default schedule.
3b Event. Measurements are evenly spaced, but you can record an
“event” and conserve memory by having the device store only
measurements that differ from the previous stored measurement of a
designated parameter by a specified amount. Any available parameter
may be selected for event comparisons, and the “delta” or difference
amount is prompted in the current parameter unit.
3c Log. Designed to capture early-time water-level data during aquifer
testing, measurements are very closely spaced at the start of the test
(about 3 measurements per second) and get further apart on a
logarithmically decaying schedule as the test progresses. All measure-
ments are stored in the device memory. Available for tests that
measure only pressure, depth, or water level.
3d Linear Average. This type of test can smooth out anomalous highs
and lows that may occur, for example, when a water wave passes over
the instrument. Each stored measurement is the average of several
rapid measurements.
SECTION 8: LOGGING DATA