5
Flexible Measurement Signals
Widen Scope forApplication
Applications
■
Evaluation of signal-dependent components
Comparator setting screen with additional Δ% display
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.
Measurement value
display
Deviation display
Example of measuring signal dependence of coils
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
V0
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).
Im =
�
ꢀ
| R0 + Z|
ꢆꢀ
ꢂ
ꢃ
| Z |
ꢄꢅ
+ V0
Vm =
ꢁ
ꢆꢅ
| R0 + Z |
V mode : set V0
CV mode : set V0 so that the voltage across the component is
the CV value (VCV)
CC mode : set V0 so that the current through the component is
the CC value (ICC)
CV mode
CC mode
VCV
Im = ICC
Im =
�
ꢀ
�
ꢀ
ꢆꢀ
ꢆꢀ
| Z|
ꢄꢇꢇ
ꢈꢈꢈꢈꢈ
ꢂ
ꢃ
Vm
Im
: voltage monitor value
: current monitor value
ꢁ
ꢆꢇꢉ
ꢁ
Vm = VCV
Vm = ICC × | Z|
R0
: output impedance (50 Ω constant)
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.
Series equivalent resistance Rs (Ω)
Measurement values:
Rs (DCR), Rs, |Z|, θ, etc.
Measurement frequency:
Frequency characteristics of a manganese battery
(1 mHz to 100 kHz) [ cole-cole plot ]
DC, 1 kHz fixed, and variable frequency
Measurement signal:
constant current (CC) mode
ASM-SENSOR [ ASM GMBH ]
