Extech Instruments MG500 User Manual page 6

Meter Preparation
Warning: Ensure that the circuit under test does not include devices or components that can be
damaged by 10KVDC; such devices include power factor correction capacitors, low voltage mineral
insulated cables, electronic light dimmers, ballasts and starters for fluorescent lamps.
Connecting the Test Leads to the meter
o Connect the Red (Line) test lead to the Red test jack on the meter.
o Connect the blue lead (attached to the Red test lead) to the Blue test jack on the meter.
o Connect the Green (Earth) test lead to the Green test jack on the meter.
Optional Leakage guard
Connect the optional Blue (Leakage guard), test lead to the Blue test jack.
NOTE: The Blue (Leakage guard) lead is attached directly to the top of the Blue guard lead of the
Red test lead.
Connecting the Test Leads to the device under test
Warning: make sure that the circuit under test is de-energized.
o Connect the Green (Earth) lead to the Earth or ground side of the insulator under Test.
o Connect the Red (Line) test lead to the other side of the Insulator under test.
o Optional Leakage guard: Connect the Blue (Guard) lead to the insulator sheathing and
covering material as shown on the diagram. Use a copper wire wrapped around the
insulator at about its center.
Shop for Extech products at:
6
ShopExtech
MG500-en-GB_v1.3 3/17
1.800.561.8187
.ca