- 6 -
FULL
If a single memory is full of 500 groups and continues to
measure, the screen will display "FULL" and no more data will
be stored.
Indicates that the current measurement result is judged as
FAIL failed.
Indicates that the current measurement result is judged as a
WARNING.
Indicates that the current measurement result is judged as
PASS passed.
Indicates that the current measurement result has subtracted
the initial line resistance.
Indicates that the software filtering function has been turned
on, and the digital change is slower than the normal mode,
and it is closed by default.
Indicates that the instrument has turned on the automatic shift
function, which is turned on by default.
Indicates that the current measured voltage has exceeded the
safety voltage of the human body, please pay attention to
safety.
VII
．
Measuring principle
7.1 Principle of AC 4-terminal test method
An AC current I with a frequency of 1KHz flows between the positive and negative electrodes of
the battery, and the AC voltage difference V between the positive and negative electrodes of the
battery is measured, and the internal resistance of the battery is calculated according to the
formula R=V/I. In order to ensure the measurement accuracy, the two current electrodes (S), the
two voltage poles (P) should be in contact with the positive and negative poles of the battery
independently, and the correct measurement value can be obtained without wire resistance or
contact resistance.
7.2 Principle of voltage measurement
After the sampling resistor divides the pressure and the noise is filtered out, the ADC samples
and calculates and corrects to get the measured value through the program.
7.3 Principle of temperature measurement
The voltage divider network is composed of an NTC temperature sensor and Rx, Rx is a
