MI 3290 Earth Analyser
Tests and Measurements
76
Test can be started from the 4 - pole measurement window. Before carrying out a test, the
following parameters (Test Mode, Test Voltage, Test Frequency, Distance and Limit (Ze))
can be edited.
Figure 11.17: 4 - pole measurement menu
Test parameters for 4
– pole:
Test Mode
Set test mode: [single, sweep]
Test
Frequency*
Set test frequency: [55 Hz, 82 Hz, 94 Hz, 105 Hz, 111 Hz, 128 Hz, 164 Hz,
329 Hz, 659 Hz, 1.31 kHz, 1.50 kHz, 2.63 kHz, 3.29 kHz, 6.59 kHz, 13.1
kHz, 15.0 kHz]
Test Voltage
Set test voltage: [20 V or 40 V]
Distance (r)
Distance between E and S probe (user defined).
Distance (R)
Distance between E and auxiliary earth rod H (user defined).
Limit (Ze)
Limit value selection: [
OFF, 0.1 Ω – 5.00 kΩ]
*single test mode only.
4-pole Measurement procedure:
Select the
4-pole measurement function.
Set the test parameters (mode, voltage, frequency, distance and limit).
Connect the test leads 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 cursor keys to toggle between graph view and result view (optional).
Save results (optional).
Figure 11.18: Example of 4-pole
measurement result
Figure 11.19: Example of 4-pole
measurement graph view
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.
When measuring at high frequencies use the guard terminal and shielded cable (H).
Notes (Probes):
High impedance of S and H probes could influence the measurement results. In this
case,
“Rp” and “Rc” warnings are displayed. There is no pass / fail indication in this
case.
Probes must be placed at a sufficient distance from the measured object.
