Product Description

1. Module description:

a. High precision, high reliability, suitable for high-end applications

b. Equipped with reverse connection protection, it does not burn when connected in reverse (positive and negative connections are reversed)

2. Pin description:

a. +(indicated by the small red line): Positive pole of the power supply terminal (connected to the positive pole of the DC power supply)

b. - (indicated by a small black line): Negative value at the power supply end (negative value when connected to a DC power supply)

c. V (indicated by a small yellow line): The positive pole of the tested power supply (connected to the positive pole of the power supply to be tested)

d. The thick red line drawn out: connected to the negative pole of the load

e. The thick black wire drawn out: connected to the negative terminal of the tested power supply

3. Precautions before use

The power supply voltage of the product must be 4~30V, and the test current range is 0~999mA. Please wire according to the diagram.

Product Parameters

Supply voltage DC4V-30.0V

Current testing range 0-999MA

Voltage measurement range: 0.0V-100V

Voltage error ± 1%

Current error ± 2%

Working current<20MA

Refresh speed is about 620MS per time

Display mode: dual three digit 0.28 "LED digital tube

Display colors: red+red, red+blue. Optional

Lead length 15CM

Dimensions: 48X29X22MM, length X width X thickness; Installation hole 46X27MM

Working temperature -10 ° C~65 ° C

Product Functions

6. Problem explanation during the usage process:

a. Voltage display is normal, current display is 0.00 or 0.0

Ensure that the thick black line is connected to the negative terminal of the battery and the thick red line is connected to the negative terminal of the load. (Note that the wiring for discharging and charging is different, see the concepts of load and power supply at the end). (The header uses original imported chips, which undergo very strict testing and calibration before leaving the factory to ensure 100% no quality problems. 99.99% of cases where the current displays 0 are due to wiring errors, please be patient and carefully check the wiring).

b. Inaccurate current display

If it is a direct or independent power supply and the equipment power supply are grounded, simply disconnect the thin black wire to achieve accuracy.

c. No display when connected to the power supply

Any AC power that has been rectified must be filtered by an electrolytic capacitor with a capacitance of at least 1000uF before it can be supplied to the meter head.

d. Judging the quality of the header (the following are two situations of normal headers)

Do not connect the shunt, connect the thin red and black wires to the power supply. The current displayed on the meter with a range of 50A is 50.0-59.9, and the current displayed on the meter with a range of 100A is 100-109.

Connect the shunt, connect the thin red and black wires to the power supply. The current displayed on the meter with a range of 50A is 0.00, and the current displayed on the meter with a range of 100A is 0.0 °

e. Other precautions:

Current measurement can only be connected in series between the negative pole of the power supply and the negative pole of the load.

Voltage range: The power supply voltage range for the 5-wire header is 4-28V, which means that the voltage of the thin red wire connection cannot exceed

Over 28V.

f. Regarding the concepts of load and power supply:

During discharge: The battery, switch power supply, and transformer are the power sources, while resistors, lights, motors, and electrical equipment are the loads.

When charging: The charger, generator, and solar energy are the power sources, while the charging battery and battery are the loads.

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