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SECTION 3
Table
3-3.
AUTO
Equivalent
Circuit
Selections
3.5.4
Measurement
Range Selection
Measurement
Capabilities
Conditions
for selection of
Conditions
for selection of
series mode (SER)
parallel mode (PAR)
Function
Function
Function
Parameter
Function
Parameter
ESR
?:
(IZI
11wZ)
Q,D
L, c
G
lil'
L,C,(lZl
>lw1)
Q,D
0
Measurement
range selection for the selected function is
performed automatically.
Reading range for the function
parameter (m
DISPLAY) is also selected automatically.
The measurement
capability
of each function and func-
tion parameter is summarized
as follows:
IZI,
ESR
The instrument
will go to the optimum (most accurate)
range to make the measurement.
4 l/2 digits (19999 digits max>.
Table 3-4 lists the impedance
ranges for the instrument.
Notice that the valid measurement
range is frequency
and level dependent.
The reading limits for each range
are defined by the Lower Limit Extension and the Upper
Limit Extension. The instrument
will not measure levels
that fall outside of these limits.
The optimum measurement
is performed and displayed
120Hz
: O.OOOnF to 199.99mF
on the range that is bounded by the Lower Limit and Up-
1kHz
: O.OpF to 19.999mF
per Limit (see Table 3-4). For example, for a 1Om meas-
1OkHz
: O.OOpF to 1.999mF
urement, the displayed reading will occur on Range 3.
1ookHz
: O.OOOpF to 199.99yF
Hysteresis -
A hysteresis of approximately
10% is used
to keep the instrument
from changing ranges for a read-
ing that varies along the borderline
of two ranges. When
a reading is increasing,
the instrument will up range im-
mediately
after 19,999 counts. For example, on Range 2,
assume a reading of 1.9999w2. If the reading increases by
one count, the instrument up ranges and reads 2.000 Wz
on Range 3. When the reading is decreasing,
the instru-
ment will down range after 1800 counts. Continuing with
the same example, a decreasing
reading will read 1.800
162 on Range 3. When the reading decreases
one more
count, the instrument
will down range to Range 2 and
read 1.7999 kfi. Thus, a window of 200 counts is provided
for reading variances.
C
Type:
Exponent representation
Resolution:
4 l/2 digits (19999 max)
Range:
O.OOOpF, +(O.OOlpF to 199.99mF)
The range of
I C I
changes according to
frequency:
L
Type:
Exponent representation
Resolution:
4 l/2 digits (19999 max)
Range:
O.OnH, rt(O.lnH to 19.999kH)
The range of
I
L
I
changes according to
frequency:
120Hz
: O.OpH to 19.999kH
1kHz
: O.OOpH to 1.9999kH
1OkHz
: 0.OOOu.H to 199.99H
1ookH
: O.OnH to 19.999H
3-12
+
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