METREL MI 3290, Instruction Manual

Page: 109 / 162

MI 3290 Earth Analyser Tests and Measurements
109
Test can be started from the Pylon Ground Wire Test window. Before carrying out a test the
Following parameters (Test Mode, Frequency and Number of turns F1
– F4) can be edited.
Figure 11.84: Pylon Ground Wire Test menu
Test parameters for Pylon Ground Wire Test:
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]
Number of turns F1 Set the number of turns for Flex 1 input terminal: [1, 2, 3, 4, 5, 6]
Number of turns F2 Set the number of turns for Flex 2 input terminal: [1, 2, 3, 4, 5, 6]
Number of turns F3 Set the number of turns for Flex 3 input terminal: [1, 2, 3, 4, 5, 6]
Number of turns F4
Set the number of turns for Flex 4 input terminal: [1, 2, 3, 4, 5, 6]
Pylon Ground Wire Test (PGWT) measurement procedure:

Select the Pylon Ground Wire Test function.

Set the test parameters (mode, frequency, number of turns 1-4).

Connect the test leads and flex 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 cursor keys to toggle between graph view and multiple result views
(optional).

Save results (optional).
Figure 11.85: Example of
Pylon Ground Wire test result
– I
g_w
Figure 11.86: Example of
Pylon Ground Wire Test result
–
I
f(1-4)
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.
Note (Probes):
 Probes must be placed at a sufficient distance from the measured object.
Notes (Flex):
 When using only one, two or three flex clamps, always connect one clamp to F1
terminal (synchronization port).
 Make sure that the arrow marked on the clamp coupling points toward the correct
orientation for correct phase measurement.
 Make sure that the number of turns is correctly entered in the test parameters window.