METREL MI 3290 - Page 80

MI 3290 Earth Analyser Tests and Measurements
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Test can be started from the 2 Clamps measurement window. Before carrying out a test the
following parameters (Measurement Clamp Type, Test Frequency, Generator Clamp Type
and Limit (Ze)) can be edited.
Figure 11.25: 2 Clamps measurement menu
Test parameters for 2 Clamps:
Measurement Clamp type
Set measurement clamp type: [A1018]
Test Frequency
Set test frequency: [82 Hz, 94 Hz, 105 Hz, 111 Hz, 128 Hz,
164 Hz, 329 Hz]
Generator Clamp type
Set generator clamp type: [A1019]
Limit (Ze)
Limit value selection [OFF, 0.1 Ω – 40 Ω]
2 Clamps Measurement procedure:
 Select the 2 Clamps measurement function.
 Set the test parameters (clamp type, frequency and limit).
 Connect the clamps to the instrument and to the test object.
 Press the Run key to start the measurement.
 Wait until the test result is displayed on the screen.
 Press the Run key again to stop the measurement.
 Save results (optional).
Figure 11.26: Example of 2 Clamps measurement result
Notes:
 Consider displayed warnings when starting the measurement!
 High noise currents and voltages in earth could influence the measurement results. The
tester displays the “noise” warning in this case.