ABEM Terrameter SAS 1000 / SAS 4000
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Deviations from the expected values of up to 10% are acceptable, because the components
only have a limited accuracy. Usually the chargeability reading M
10,110
is in the range 8.0 to
8.5 msec.
If in future checks, minor changes in the readings occur (within, say, 1%) they can be
attributed to temperature changes etc.
If you do not have access to a Multi Channel Adapter the following test can be carried out:
1.
Connect the test resistor between the C1 and C2 terminals of the Terrameter.
2.
Connect C1 and P1 using a test cable with banana plugs or equivalent.
3.
Connect C2 and P2 using a test cable with banana plugs or equivalent.
4.
Perform a resistivity measurement using AUTO output current and note down the reading.
Note: The test resistor must be able to handle the level of current you select as maximum, or it
may be damaged.
9.5.2
Quick check of SAS 1000 / 4000
During field work it happens that “it just does not work”. It will be necessary to quickly sort
the problem out.
A very quick check of SAS 1000 /4000 is done in a few steps:
•
With the unit switched On and set for resistivity, No cables (but the power cable)
attached. Preferably the unit should be set to show ohms instead of ohmmeters.
•
Press the red MEASURE button
•
ERROR 1 should appear on the LCD, this is a sign of health.
•
Attach a piece of metal wire, a straightened paper clip or so under the terminal nuts
C1 and C2. The piece of metal might be replaced by a resistor with a known value
and so the test will also be a simple quality check.
•
Attach a piece of wire between C1 and P1, likewise between C2 and P2 Again
straightened paper clips serve well.
•
Press the red MEASURE button.
•
ERROR 1 should not appear. If a reasonable low reading, some 10 to 100 m
or a
value corresponding to the resistor used appears, there are reasons to assume the unit
under test is in shape.
•
The test may be repeated with other current settings, different resistors etc.
