Voltage value jitter when not measured after starting up
Under the condition of no test after starting up, it is normal that the voltage has a numerical jitter. The value is a random value, meaningless and has no influence on the measurement results.
Could you tell me how to adjust YR1030+ to zero? There is also a 0.0X mΩ resistance between the two Kelvin clips
There is a wiring sequence for the direct short circuit of the Test line. The clamping sequence is red line, black line, white line, white line. Only when the probe test line contacts the same metal surface can it be the minimum value. The minimum value is generally not zero, but does not affect the measurement accuracy. No processing is required. (The machines are all calibrated before shipment, and no zero adjustment is required normally.)
The internal resistance below 0.3 mΩ cannot be measured, can it?
It is not impossible to measure, and the reading error is large. For example, 1 mΩ error plus or minus 0.03 m Ω , if it is 0.2 m Ω error plus or minus 0.05 m Ω, so more than 0.3 m Ω is recommended. The measured value of 0.05 mΩ is sometimes very accurate, but the uncertainty will make the reference of little significance.
To measure the internal resistance of the 18650 battery, should it be fully charged or not?
If you want to get a general idea, you can test directly. To be precise, if it‘s a new battery, test it on a full charge. Old batteries are tested after they have been drained. But under normal conditions, the change in internal resistance is very small. The better the battery‘s internal resistance, the less it is affected by the amount of charge.
Is the instrument measuring time positive and negative? Will the connection be damaged?
Connect opposite have no influence, divide positive and negative pole. As long as it doesn‘t exceed 28V.
The figures change quickly and cannot be measured.
The test line is not in good contact with the battery, there is strong interference around or the battery is charging and discharging. Normal use will not appear jump.
Is it necessary to take off the battery line to test one of the multiple connections of electric cars? Or can you just measure it?
As long as it is not in startup, or charging, you can directly test one section.
Is it OK to measure the battery pack?
As long as the total measured voltage is less than 28V. However, the resistance of the connecting line between the batteries is often greater than the internal resistance of the battery, so the series measurement cannot accurately measure the internal resistance. It is best to measure the battery poles directly.
Can I measure the internal resistance of capacitance?
The internal resistance value of approximate capacitance.