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Section
2 - Basic Measurements
2.1 GENERAL.
Figure 2-1 shows the six bridge circuits used
in the Type 1650-B Impedance Bridge, a s well a s the
balance equations.
Hays and Maxwell inductance
bridges and series and parallel capacitance comparison
bridges are used t o provide wide coverage over the
D
and Q ranges.
F u l l use of these wide ranges a t low
Q and high D values is achieved by means of an Ortho-
null@ balancing mechanism (paragraph
5.4).
Both a c
and dc measurements may be made with the bridge,
which has a magnitude responsive detector.
The next two pages concisely state the informa-
tion needed for making basic measurements.
The
schematics include a l l relevent bridge terminals to aid
the user in making special measurements that require
bias, etc.
The symbols on the diagrams are the same
a s those defined i n Section 1.
A
short discussion of
Orthonull usage, detector sensitivity, e t c relating t o
basic measurement practice follows the instruction
chart.
Cs
c~
R
(
Y,"ODI)
(07';:
t g H 0 )
( 3
SERIES CAPACI JANCE
PARALLEL CAPACITANCE
RESISTANCE
UNKNOWN
~n
TO l M e g
ao"
R~
R~
ICGRL"
0 - 1 6 k
c
r
D l u f
RATIO
0 - I l k
RATIO
10 k
0 - N k
L~
L~
(
LOW
O
:
0 2 TO10
SERIES INDUCTANCE
PARALL EL INDUCTANCE
Figure
2 - 1.
Bridge circuits used in impedance bridge.
BASIC M E A S U R E M E N T S
2-1
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