Q: How to know the operating status of the micro pump based on the indicator light?

A: Most models of Hilin micro pumps with speed regulation have working instructions to feedback the real-time status of the micro pump. Different types of micro pumps have different indicator lights.

C26/C30/D35 frequency speed control type/knob speed control type has working condition indicator light:

a. When the green light is always on, it means it is in the standby state of normal power supply;

b. When the green light flashes, it means the micro pump is working normally, and the flashing frequency indicates the speed of the speed;

c. When the red light is always on, it means that the micro pump shuts down and alarms due to excessive motor speed deviation, which may be due to overload;

e. When the red light flashes, it means that the micro pump shuts down and alarms due to unstable power supply voltage, which may be due to overvoltage/undervoltage/other power supply instability;

f. If the indicator light does not light up and the positive and negative poles are connected reversely, the micro pump will not work, but it will not damage the pump.

C50/D50/C60/D60/C61 model basic remote control type/frequency speed control type/voltage speed control type has working condition indicator light:

a. When the green light is always on, it means it is in the standby state of normal power supply;

b. When the green light flashes, it means the pump is working normally, and the flashing frequency indicates the speed of the speed;

c. When the red light is always on, it means that the micro pump shuts down and alarms due to excessive motor speed deviation, which may be due to overload;

e. When the red light flashes, it means that the micro pump shuts down and alarms due to unstable power supply voltage, which may be due to overvoltage/undervoltage/other power supply instability;

f. If the indicator light does not light up and the positive and negative poles are connected reversely, the pump will not work, but it will not damage the pump.

Indicative feedback for C15/D15/S15 series:

a. Blue light flashes, normal status, the flashing frequency indicates the speed of rotation;

b. The red light is always on, indicating abnormal conditions, such as the pump motor speed is too low;

c. The red and blue lights flash alternately, indicating abnormal status. The pump motor speed is low and unstable, which means the pump load is too large;

d. If the indicator light does not light up and make sure it is powered on, there are two possibilities: reverse connection of the positive and negative poles, overvoltage or undervoltage.

At the same time, other micro-pumps with touch screens can also feedback the operating status of the pump based on the alarm code. For more information, please refer to the Hilin Technology Micro Pump User Manual

Q: How does Hilin Technology perform air tightness testing on micro pumps?

A: The air tightness of the micro pump reflects the leakage of the pump itself during gas transmission. Hilin micro pump has good air tightness, and of course it is not absolutely leak-proof. Hilin Technology has professional air tightness testing methods and testing equipment. If customers have specific air tightness requirements, our company can provide air tightness testing reports according to customer needs.

Our commonly used air tightness testing methods are as follows:

1.Exhaust outlet float falling to the bottom method: Block the front end of the vacuum pump or air pump, connect the exhaust end to a small-range float flowmeter with a hose, and inflate the lower end of the float flowmeter. Then observe whether the float of the flow meter falls to the ground and there is no fluctuation. This method is suitable for general air tightness testing in the production process. All products are tested for this item during the production and quality inspection process.

2. Bubble method: Block the front end of the vacuum pump or air pump, connect the exhaust end to a container filled with water, insert the pipe mouth under the liquid surface, inflate the liquid, and observe whether there are bubbles emerging from the exhaust pipe mouth. If no bubbles appear, it is considered qualified. This project is suitable for occasions with high air tightness requirements. It can eliminate the leakage of tiny bubbles visible to the naked eye through qualitative methods.

3. Air tightness test tooling method: Through our professional air tightness testing tool, quantitatively test the air tightness of the micro pump under the highest pressure/vacuum working condition, that is, the pump is in the highest pressure/vacuum working condition unit pressure drop over time. The exhaust port float bottom method and bubble method can quickly determine the air tightness of the micro pump, while the air tightness testing tool method is a quantitative test of the leakage of the pump itself. The air tightness test tooling can quantitatively test the pressure drop caused by extremely small air leaks. According to customer requirements, our company can issue an air tightness test report.

The air tightness testing method is described in detail in our company’s corporate standards, and you can also consult our company’s staff. It should be noted that our products have high air tightness, but “absolute” air tightness does not exist in fact. For example, the silicone tube used for testing may have defects that are invisible to the naked eye under the microstructure. The micropores cause gas leakage at the molecular level.