TY - JOUR
AU - BAKKER, J. W.
AB - A device to monitor matric potentials in soils was designed and constructed to automatically scan and log eight individual tensiometers, each using their own pressure transducer. Differences in pressure of 26.9 Pa in the range of 0 to –90.22 kPa can be detected. The measuring and logging part is based upon a Basic-programmable single board data logger. Using a set of commands the device can be operated by a computer through an RS232 serial interface, for example to program the scanning interval, to retrieve stored measurements, or to check the status of the device. By using an internal routine that determines a linear calibration line, it is possible to retrieve measurements directly in any unit desired, for example cm water column, kPa, or PSI. The apparatus can also be used as a stand-alone battery-operated device, as a front-end device giving eight voltage signals proportional to the measured pressures, or as an intelligent slave module in a large measuring system. The device is built into a small, waterproof of epoxy box so that it can be installed into the ground. It is also equipped with a valve system that enables flushing of the connected tensiometers so that the device with tensiometers can remain installed for an indefinite period of time.
TI - A UNIVERSAL DEVICE TO MEASURE THE PRESSURE HEAD FOR LABORATORY USE OR LONG‐TERM STAND‐ALONE FIELD USE
JF - Soil Science
DA - 1992-12-01
UR - https://www.deepdyve.com/lp/wolters-kluwer-health/a-universal-device-to-measure-the-pressure-head-for-laboratory-use-or-bseJ0C7jw3
VL - 154
IS - 6
DP - DeepDyve
ER -