Sanwa mg5000, Инструкция по эксплуатации, Страница: 18 / 28

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5-7 Using the GUARD Terminal
To use the GUARD terminal, connect the GUARD (Green) lead to
the GUARD (G) terminal.
When measuring the insulation resistance of a cable, etc., wrap a
bare conductor around the insulator surface and connect to the
GUARD terminal. This makes it possible to prevent the insulation
resistance measurement error that may be produced when the
leak current on the surface flows into the current detection area.
Caution : Do not apply a voltage across the EARTH (ground) and
GUARD terminals.
Insulation resistance tester
Conductor
L
G
E
Insulation
Protective wire
Cable with sheath
+
[6] MAINTENANCE
1. This section is very important for safety. Read and understand
the following instruction fully and maintain your instrument properly.
2. The instrument must be calibrated and inspected at least once
a year to maintain the safety and accuracy.
6-1 Maintenance and Inspection
1) Appearance:
• Is the appearance not damaged by falling?
2) Test leads, measurement probe and alligator clip:
• Is the cord of the test leads not damaged or the core wire
not exposed at any place of the test leads?
• Is the measurement probe or alligator clip fit tightly?
If any of the above is found with the appearance, do not use the
equipment and have it repaired or replaced.
WARNING