Hioki IM3570, Instruction Manual

Page: 56 / 458

4.2 Setting Basic Settings of Measurement Conditions
48
Testing some types of sample is not possible using constant current. In this case, the following
symbol appears on the display:
In such a case, constant current testing is not performed. Change the constant current level
to a value not more than the value being shown as Imoni.
Reference When a 1 mH impedance is measured at 1 kHz, the CC operation range can be
obtained as follows.
Sample impedance Zm becomes as follows:
The impedance
Zm'
observed from the generator is as follows:
Accordingly, the current Im across both leads of the sample is as follows:
Because the generator output voltage range is 5[mV] to 5[V] for 1 kHz, the CC operation
range per the above expression is
Im = 8.47[

A] to 42.3[mA].
In low Z high accuracy mode, the output resistance
Ro
becomes 10[

].
Xm 2

fL =
Zm
=
Rm
+
jXm
=
0
[

] -
j62.8
[

]
Ro
: output resistance (100 [

])
Zm'
=
Ro
+
Zm
=
100
[

] -
j62.8
[

]
Im
Vo
Zm

------------
Vo
118.1

------------------ = =
Vo
: generator output
| Zm' |
Vo
118.1
[

]