Appx. 10 Precautions When - Hioki BT4560 Instruction Manual

Appx. 10 Precautions When Measuring the Battery
The stability of AC response
When measuring the impedance, the response may not stabilize immediately after AC is applied. The sampling
using the sample delay function after the AC response is stabilized enables one to measure the impedance
accurately.
Applying AC
Adjusting SOC (State Of Charge)
The impedance of the battery may vary depending on its SOC. The impedance has a remarkable tendency to
vary when the measurement is performed at low frequency. Thus, the SOC must be adjusted. Generally, the
proper SOC is within 30% to 80%.
Caution on connections
This L terminal of the instrument is controlled to keep its potential at the ground potential. (Imaginary
grounding)
If applying an input to the L terminal which provides the L terminal has a potential to the ground, the circuit
may be broken. Do not connect equipment other than the instrument during measurement. There is a risk of
circuit damage due to improper grounding of equipment. Refer to the following figure.
AC response of battery
Sample delay
Precautions When Measuring the Battery
Sampling
1
2
3
4
5
6
7
8
9
10
15
A