abem Terrameter LS Instruction Manual
Also see for Terrameter LS: User manual
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Contents
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ABEM Terrameter LS859 Testing, Diagnostics and Error SearchTerrameter LS has built-in self-test and calibration of the major functions, includinginput boards, transmitter and relay switch. Test results are automatically logged forquality assurance purposes, and any malfunction reported to the operator.Temperature and power supply voltage is constantly monitored and logged.9.1 Self TestA self-test can be carried out which will run voltage measurements of internalreferences and do offset measurement, plus run resistivity measurements on test loadsof 1.5 and 33kohm. The test is carried out in the following way:• Disconnect all electrode cables or other devices connected to the input panel.• Navigate to the “Settings/Receiver” View and set:- “Mode” to “RES”• Navigate to the “Settings/Transmitter” View and set:- “Electrode Test” to “No”- “Minimum Current” to 1mA• Create a new Task and select the spread “LS internal” and the protocol “SelfTest”.• Start the measuring procedure.• After measuring is completed the result can be exported as a text-file forinspection and as documentation. Voltage measurements are taken on the built-inreference voltages with different measurement ranges, and the nominal values areshown in the text-file. Furthermore resistance measurements are taken on built-inresistors (note that it is not any precision resistors deviations in the range 10%from the nominal value are normal).“Max Current” can be selected according to available power supply. If the power islimited it is ok with for instance 50 mA, but if a more competent power supply is usedup to 2500mA can be selected and then a more complete self-test will be achieved.Note! This test requires at least 32 switch channels and it maynot work on individuals delivered early.9.2 Cable Continuity TestA cable continuity test can be carried out in the following way:High voltages will be present on the electrode take-outs duringthis test. Make sure nobody and nothing touches the electrodecable(s) during the cable continuity test.• Connect one electrode cable with one end to “Electrode 1-32” and the other end to“Electrode 33-64”. (Not for VES edition). Make sure that the electrode take-outsdo not touch each other or anything else |
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