Hioki 3532-50 - Setting the Constant Current (CC) Level

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4.4 Setting the Test Signal Level
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4.4.5 Setting the Constant Current (CC) Level
Test signal level
setting screen
The digit keys (If held down continuously, the corresponding digit increments
or decrements continuously.) (If the limit for the corresponding digit is reached,
these keys change to non-reversed video and become inactive.)
Monitor display

Test frequency

Set value for
constant current

Current flowing
through the test
sample

Limit value for the
voltage

Voltage between test
samples
Test frequency (Hz)
42.0 - 1.000 M
1.001 M - 5.000 M
Constant current
0.01 mA - 99.99 mA
0.01 mA - 20.00 mA
NOTE
NOTE
1. Press this key to set constant current (CC), and the monitor display will
change immediately.
2. Change the set constant current value using the digit keys.
The definable constant current depends on the frequency.
The accuracy of the constant current is 10% 10μA for 42.0 Hz to 1.000
MHz, and 20% 10μA for 1.001 MHz to 5.000 MHz.
When the test frequency is higher than 1 MHz at an constant current of
more than 20 mA, the current is automatically set to 20 mA.
3. When the setting has been established, press the key to return to the
Initial screen.
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 10 mH impedance is measured at 1 kHz, the CC operation range
can be obtained as follows. Sample impedance Zm becomes as follows:
Zm = Rm + jXm = 0Ω + j62.8Ω Xm: 2πfL
The impedance Zm' observed from the generator is as follows:
Zm'=Ro+Zm=50Ω + j62.8Ω Ro: output resistance (50 Ω)
Accordingly, the current Im across both leads of the sample is as follows:
Im = Vo/|Zm'| = Vo/80.3Ω Vo: generator output
Because the generator output voltage range is 10 mV to 5 V for 1 kHz, the CC
operation range per the above expression is Im = 125 μAto62.3mA.