Terms And Conventions - QuadTech Sentry Plus Series Instruction Manual

2.1

Terms and Conventions

Multiple
1000000000000000
1000000000000
1000000000
1000000
1000
.001
.000001
.000000001
.000000000001
.000000000000001
ARCing:
Current:
AC:
DC:
Charging Current:
Operation
Section 2: Operation
Table 2-1: Measurement Unit Prefixes
Scientific
10 15
10 12
10 9
10 6
10 3
10 -3
10 -6
10 -9
10 -12
10 -15
Sparking or 'flashing over' caused by a breakdown of electrical
insulation.
Alternating Current.
polarity during part of the cycle and the opposing polarity during
the other part of the cycle. Residential electricity is AC.
Direct Current. Non-reversing polarity. The movement of charge
is in one direction. Used to describe both current and voltage.
Batteries supply direct current (DC).
An insulated product exhibits the basic characteristics of a
capacitor. Application of a voltage across the insulation causes a
current to flow as the capacitor charges.
instantaneously rises to a high value as voltage is applied then
exponentially decays to zero as the DUT becomes fully charged.
Charging current decays to zero much faster than dielectric
absorption.
Engineering
Peta
Tera
Giga
Mega
Kilo
milli
micro
nano
pico
femto
AC is an electrical current that has one
Symbol
P
T
G
M
k
m
u
n
p
f
This current
Page 27 of 85