Since voltage cannot be seen, it’s not possible to check how much voltage is flowing in a circuit just by looking at it. However, each circuit in an electronic device has a predetermined voltage that’s required to operate it, and higher voltages can cause equipment damage or bodily injury.
At the same time, circuits won’t operate if powered by too low a voltage, so it’s necessary to investigate whether the voltage is correct when an electronic device malfunctions. Testers are needed to measure voltage.

You’ll need a measuring instrument if you want to measure something. Instruments are used to measure things accurately; for example, you’ll need a yardstick or measuring tape if you want to measure length,

a scale or balance if you want to measure weight, and a clock if you want to measure time. In this way, the instrument used depends on what’s being measured.

The same applies to voltage measurement. This is particularly true since you can’t see or touch voltage. Unlike physical properties, you can’t make a rough estimate just by looking at it. Consequently,

you’ll need a tester to measure voltage. Some of the purposes for which these instruments are used include:

Checking safety
Checking quality
Making predictions based on measured values
Solving problems
Checking suitability

Use Steps

1. Use the TypeC power port or DC power supply to the power.

2. Press and hold the K1 button for 10 seconds to automatically switch to the English interface.

3.. Select the detection port according to its own interface, and then you can check whether the voltage difference is normal.

Note:
1. The 2.0mm pin and 2.54mm pin of the tester are designed for parallel input and can only be connected to one set of batteries, and cannot be touched with metal conductors.

2. The tester does not come with cables! Each customer's needs are different, and the cables used are also different!

3. The hardware configurations of the Chinese and English versions are exactly the same, except for the display interface. Foreign users please purchase the English version.

4. This product is only used to test the voltage of each battery string and has no balancing function!

5. This product has a one-year warranty! If there is any damage caused, you will have to pay the return shipping fee!

6. The original intention of the tester is to test the assembled battery pack and test the voltage of each string. If it is modified for other purposes, we will not provide technical support.

7. If you do not have professional electronic and electrician skills, it is not recommended to purchase this product.

8. The adapter board can be plugged into the tester and is compatible with battery testing purposes of different series numbers (because the adapter pins will be crushed during transportation, we do not solder the pins before shipping)