Fluke 1650B [28/62] Warning

165XB

Users Manual

This test will take several seconds to complete. If the mains is

disconnected while the test is active, the test automatically terminates.

Note

Errors may occur due to preloading the circuit under test.

To measure loop impedance—Hi current trip mode:

If no RCDs are present in the system under test, you can use the high current

Line Earth (L-PE) loop impedance test.

1. Turn the rotary switch to the

x position.

2. Connect all three leads to the L, PE, and N (red, green, and blue) terminals

of the tester.

3. Press 1 to select L-PE. The

o appears to indicate that hi current trip

mode is selected.

4. Repeat Steps 4 through 8 from the preceding test.

XW Warning

The symbol o on the LCD indicates the high current loop

mode - any RCDs in the system will trip - ensure there are no

RCDs present.

Earth Resistance Testing by Loop Method

You can also use the tester to measure the earth resistance component of the

total loop resistance. Check your local regulations to determine if this method is

acceptable in your area. You can use three leads or the mains cord to perform

this test. Use the connection shown in Figure 12 when making a 3-wire

connection for earth resistance loop test. Zero the test leads (see sequence for

Loop Impedance measurement).