Decagon Devices 5TE Operator's Manual
Also see for 5TE: Operator's manual
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Contents
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5TE Operator’s Manual7. Installing the Sensors26Removing the sensorsWhen removing the 5TE sensor, do not pull it by the cable!This could break the internal wires and cause the sensor tomalfunction or not function at all.Multiple sensor Installation‘The 5TE sensor makes eletrical conductivity (EC) mea-surements by exciting one screw on the sensor and measur-ing the current that moves from that screw to the adjacentscrew that is grounded. The distance between the screws isan important part of the EC calculation. If 5TE sensors areplaced close together (within 20cm), it is possible for someof the current that leaves the excited screw to pass throughthe nearby sensor’s ground screw, thus producing an errone-ous sensor reading.This problem occurs regardless of what logging system youare using if the ground wires are connected at all times. Ifyou must have your sensors close together, (i.e. columnexperiments, etc) consider a multiplexing option that wouldisolate the ground wires.If you are installing sensors vertically at short depth inter-vals, do not bury them directly over the top of each other.Although at times the vertical distance may be less than20cm, the sensors can be staggered horizontally so they arenot directly above each other, thus meeting the distancerequirement. |
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