MI 3290 Earth Analyser
Tests and Measurements
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11.11.3 Check Iron, Flex Clamps Measurement
Test can be started from the Check Iron, Flex Clamps measurement window. Before carrying out a
test the following parameters (Measurement Clamp Type, Test Voltage, Test Frequency and
Number of turns F1
– F4) can be edited. Output terminals H and E must be shorted.
Figure 11.107: Check Iron, Flex Clamps
measurement menu
Figure 11.108: Example of Check Iron, Flex
Clamps measurement result
Test parameters for Check Iron, Flex Clamps measurement:
Measurement Clamp Type
Set iron clamp type: [A1018]
Test Voltage
Set test voltage: [20 V or 40 V]
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]
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]
Check Iron, Flex Clamps Measurement procedure:
Select the Check Iron, Flex Clamps measurement function.
Set the test parameters (clamp type, voltage, frequency and number of turns 1-4).
Short H and E terminals.
Connect iron/flex clamps to the instrument and embrace the wire that shorts H and E
terminals.
Press the Run key to start the measurement.
Wait until the test result is displayed on the screen.
Evaluate measurement results. (Compare it with displayed Igen current).
Save results (optional).
Note:
Consider displayed warnings when starting the measurement!
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.
