165X
Users Manual
26
To measure earth resistance using the loop test
method
1. Turn the rotary switch to the Z
I
position.
2. Press 1 to select L-PE.
3. Press 3 to select R
E
(resistance).
4. Press and release T. Wait for the test to complete.
• The primary (upper) display shows the loop
impedance.
• The secondary (lower) display shows the earth
resistance.
Line Impedance
Line impedance is source impedance measured between
Line and Neutral. You can use this to measure:
• Impedance Line to Neutral.
• Line to Line impedance in 3-phase systems.
• L-PE loop measurement. This is a way of making a
high current, 2-wire loop measurement. It cannot be
used on circuits protected by RCDs because it will
cause them to trip.
apx034f.eps
Figure 13. Line Impedance Display
To measure line impedance
1. Turn the rotary switch to the Z
I
position.
2. Press 1 to select L-N.
3. You can use the mains cord or test leads for this
measurement. With test leads use the red and blue
leads connecting to L and N terminals on the tester.
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