ABEM Terrameter LS
85
9
Testing, Diagnostics and Error Search
Terrameter LS has built-in self-test and calibration of the major functions, including
input boards, transmitter and relay switch. Test results are automatically logged for
quality assurance purposes, and any malfunction reported to the operator.
Temperature and power supply voltage is constantly monitored and logged.
9.1
Self Test
A self-test can be carried out which will run voltage measurements of internal
references and do offset measurement, plus run resistivity measurements on test loads
of 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 for
inspection and as documentation. Voltage measurements are taken on the built-in
reference voltages with different measurement ranges, and the nominal values are
shown in the text-file. Furthermore resistance measurements are taken on built-in
resistors (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 is
limited it is ok with for instance 50 mA, but if a more competent power supply is used
up 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 may
not work on individuals delivered early.
9.2
Cable Continuity Test
A cable continuity test can be carried out in the following way:
High voltages will be present on the electrode take-outs during
this test. Make sure nobody and nothing touches the electrode
cable(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-outs
do not touch each other or anything else
Summary of Contents for Terrameter LS
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