5
Flexible Measurement Signals
Widen Scope for Application
Applications
■
Evaluation of signal-dependent components
Since any test signal can be selected, it is possible to
measure the inductance of winding, floating capacitance,
characteristics at operating frequency, and low
frequency resistance components. The 3522-50 further
allows inductance (L) and DC resistance (DCR) to be
measured by the same unit.
Example of measuring signal dependence of coils
Comparator setting screen with additional
Δ%
display
Deviation display
Measurement value
display
For chokes, transformers, and other components
with an inductive core, the values depend on the
measurement signal. By varying the measurement current,
measurements showing the signal dependence of the coil
can be shown as a graph.
Judgment standard value and upper and lower limit widths
The screen at left shows an example of the
Δ%
setting;
The screen at right shows an example of the % setting
from current models. In either, the judgement range is a
percentage of the reference values.
The
Δ%
display is easy to interpret because the
measurement value is displayed as a deviation.
V mode
The 3522-50 and 3532-50 provide three modes for
selecting the measurement signal according to the
component characteristics: open-circuit voltage (V),
constant voltage (CV), or constant current (CC).
V mode : set V
0
CV mode : set V
0
so that the voltage across the component is
the CV value (V
CV
)
CC mode : set V
0
so that the current through the component is
�½
�½
the CC value (I
CC
)
�½
�½
�½
V
m
: voltage monitor value
�½
�½
�½
�½
�½
I
m
: current monitor value
��½
R
0
: output impedance (50
Ω
constant)
�½
�½
�½
�½
�½
�½
�½
�½
Im =
V
0
|
R
0
+ Z
�½
�½
|
|
Z
|
+
�½
�½�½�½
V
0
|
R
0
+ Z
|
�½
CC mode
�½
�½
�½
�½
�½
�½
�½
�½�½�½
�½�½�½�½�½
�½
�½
�½
Vm =
�½
CV mode
�½
�½
�½
�½
�½
�½
�½
�½
�½
�½
�½
�½
Im
�½
=
V
CV
�½
�½
�½
�½
�½
|
Z
|
�½
�½
�½
�½
�½
�½
�½�½�½
�½�½�½�½�½
�½
�½
Im = I
CC
�½�½�½
�½�½�½�½�½
�½
�½
�½
�½
�½
�½�½�½
�½
Vm = V
CV
�½�½�½
�½
�½
�½
Vm = I
CC
×
|
Z
|
Evaluating battery characteristics by measuring
the internal resistance
By measuring the internal resistance of lead-acid or compact
storage batteries, the state of deterioration of the battery, and its
lifetime and characteristics can be determined.
In particular, the 3522-50 provides low-
frequency measurement from 1 mHz,
allowing low frequency electrochemical
impedance measurement, and other
applications in basic chemical research.
Measurement values:
Rs (DCR), Rs, |Z|,
θ
, etc.
Measurement frequency:
DC, 1 kHz fixed, and variable frequency
Measurement signal:
constant current (CC) mode
Reactance X (Ω)
Series equivalent resistance Rs (Ω)
Frequency characteristics of a manganese battery
(1 mHz to 100 kHz)
[ cole-cole plot ]
ASM-SENSOR [ ASM GMBH ]
