Associated Research 3030D, Operation And Service Manual, Page: 9 / 43

INTRODUCTION
5
GLOSSARY OF TERMS
(As used in this manual)
Alternating Current, AC:
Current that reverses direction on a regular basis, commonly in the U.S.A.
60 times per second, in other countries 50 times per second.
Conductive:
Having a volume resistivity of no more than 103 ohm-cm or a surface resistivity of no
more than 105 ohms per square.
Conductor:
A solid or liquid material which has the ability to let current pass through it, and which has
a volume resistivity of no more than 103 ohm-cm.
Current:
The movement of electrons through a conductor. Current is measured in amperes,
milliamperes, microamperes, nanoamperes, or picoamperes. Symbol = I
Dielectric:
An insulating material that is positioned between two conductive materials in such a way that
a charge or voltage may appear across the two conductive materials.
Direct Current, DC:
Current that flows in one direction only. The source of direct current is said to
be polarized and has one terminal that is always at a higher potential than the other.
Hipot Tester:
Common term for dielectric-withstand test equipment.
Hypot®:
Registered trademark of Associated Research, Inc., for its dielectric-withstand test equipment.
HYAMP®: Registered trademark of Associated Research for its Ground Bond test equipment.
Insulation:
Gas, liquid or solid material which has a volume resistivity of at least 1012 ohm-cm and is
used for the purpose of resisting current flow between conductors.
Resistance:
That property of a substance that impedes current and results in the dissipation of power in
the form of heat. The practical unit of resistance is the ohm. Symbol = R
Trip Point:
The minimum resistance required causing an indication of unacceptable performance during
a ground bond test.
Voltage:
Electrical pressure, the force which causes current through an electrical conductor.
Symbol = V