BK820A BK820D DC fan speed tester

BK820A DC brushless fan speed tachometer is used to test DC fan speed. It is equipped with a color touch screen to display current, voltage, and power easily. Easy to use, connect the fan to the tester to test the speed.

product features:

1) The product has reliable performance, LCD dot matrix display, small size, and is very convenient for assembly line production and use;

2) Easy to use, you only need to connect the fan to the tester to test the speed. It has fan polarity reverse connection and short circuit protection functions;

3) Current, voltage, and power display can be used as a separate DC power supply;

4) DC fan test: can test 2-wire, 3-wire, 4-wire and brushless fans with FG and RD signals;

5) AC fan test: It needs to be equipped with an infrared sensor head separately for testing. There is no need to put any marks on the fan during the test, and the speed can be accurately tested;

6) PWM output is divided into automatic/manual control, manual 0-100% duty cycle is adjustable, automatic is divided into four sections, the duty cycle of each section is adjustable, and the interval of each section can be set arbitrarily from 1-99 seconds. PWM The output voltage can be selected from 5V or 3.3V;

7) The maximum and minimum speed limits can be set, and the horn will alarm when the limits are exceeded;

8) The maximum and minimum current limits can be set, and the horn will alarm when the limits are exceeded;

9) The BNC connector on the tester can be connected to the oscilloscope to facilitate testing of the current waveform;

10) The test method is divided into quick test and average test. The average test method can be used to measure more accurately.

11) Automatically determine the speed and current. Passed display: "PASS"

Product parameters:

Input voltage: AC 170-230V

Output voltage: DC 0V-50V ±0.2V (DK820A); DC 0V-53V ±0.2V (DK820D)

Output current: 3.0A (DK820A); 5A(DK820D)

Current display: 0mA-3.2A (DK820A); 0mA-999mA  1A-10A(DK820D)

Speed range: 0-60000RPM error <+1% (DK820A); 0-65000RPM error <+1% (DK820D)

Number of fan blades: 0-24 adjustable (DK820A); 0-99 adjustable(DK820D)

PWM duty cycle: 0-100% duty cycle can be adjusted arbitrarily (default frequency 25KHz)

Display introduction:

BK820A:

BK820D:

Precautions:

1) If you are testing an AC fan, please use an external AC power supply. If you are using an infrared head to test a DC fan, you can power the fan from output 2 for testing. If you find that it cannot be tested, please check whether the connection line of input 1 is an open circuit (this connection line is not under warranty). If it is an open circuit, please refer to the input introduction to connect it yourself. It is best to connect it from connection 2 to the fixture for testing.

2) In the 3-wire PWM mode, there is no FG signal. Because it is a current detection method, when the PWM duty cycle is very small, the current signal also becomes very small. When testing some types of fans, the test may not be possible. Or the tested speed is inaccurate. We do not guarantee that all models of fans can be fully tested in this mode.

3) There is a high voltage inside. Non-professionals are strictly prohibited from disassembling the casing. Otherwise, they will be responsible for the consequences.

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