Costa Rica - Installation and training Integrating Sphere Test System, dustproof and waterproof test equipment, EMI/EMC test machine, etc.

This cuatomer is a large laboratory from Costa Rica. They purchased a set of led test equipment from LISUN this time, including: LPCE-2 High Precision Spectroradiometer Integrating Sphere System, IK07~10 IK Level Tester, JL-34, 56, 78 Waterproof Test, SC-015 Dustproof Testing Machine, LEDLM-80PL LED Optical Aging Test Instrument, ESD61000-2 Electrostatic Discharge Simulator, SG61000-5H12 Surge Generator, etc.

There are many equipments and more training content than usual, the installation and training took 4 days. Our engineer communicate in English throughout the process, plus the all-in-English user manual, the customer are very satisfied with our service. Due to the large number of equipment, we just choose several photos of the installation training to share with you here:

[caption id="attachment_11430" align="alignnone" width="900"] Figure 1: Group photo in front of LISUN LPCE-2 High Precision Spectroradiometer Integrating Sphere System[/caption]

[caption id="attachment_11431" align="alignnone" width="900"] Figure 2: Group photo in front of LISUN JL-X Waterproof Tester[/caption]

We would do equipment maintenance for them in the near future, and would share with you by then.

Lisun Group is lead in CFL & LED Test Instruments. Our main products are Goniophotometer, Spectroradiometer, Integrating Sphere, LED Test Instruments, CFL Test Instruments, Photometer and Colorimeter, EMC & EMI Testing,Electronic Ballast Tester, Electrical Safety Testing, Environmental Test Chamber, Plug and Switch Testing, AC and DC Power Supply and etc.

Why should choose a constant current power supply for the LED driver?

Why should choose a constant current power supply for the LED driver?

The LED is a light-emitting diode, and its characteristic curve is basically the same as that of a normal diode. When the applied voltage reaches the diode conduction voltage, the slight change of the applied voltage can cause a great change in the diode current. The constant current is used to ensure that the current in the LED is constant. No matter how the voltage changes, the current flowing through the LED does not change, which can ensure the life and light decay of the LED.

If a constant voltage source with an output of 12V is used, an electric 16 ohm resistor is connected in series to supply three strings of 0.5W 5630 lamp beads. The lamp voltage is calculated according to 3.3V, the current flowing through the lamp bead Io=(12-3*3.3)/16=0.131A, and the power of a single lamp bead is P=0.131*3.3=0.4323W. Because the temperature of the lamp bead is high The voltage of a single lamp drops to 3V. At this time, the current Io=(12-3*3)/16=0.187A, the current increases by 56 mA., and the power becomes P=0.187*3=0.561 W, which exceeds the lamp power consumption. In the long run, it has a great influence on the life and light decay of LED lamp beads.

Therefore, the key to affecting the life of the LED is the temperature. When the LED temperature rises, the junction resistance decreases, that is, the conduction voltage decreases. At the same voltage, an increase in temperature will cause the LED current to increase, and the current will increase the temperature further, so that the vicious cycle will burn the LED. Moreover, the light decay of LEDs is also related to temperature. When the temperature rises, the light decay is intensified, and the phenomenon of bright and bright is appearing.

There are two reasons for the temperature rise: First, the quality problem, the thermal conductivity of the LED package is poor, the temperature in the LED die is not transmitted to the surface (internal heat and cool), even if the heat sink is added, the internals cannot be completely The heat is dissipated, and then some low-end products do not add a heat sink; the second is the temperature rise caused by the power supply. When the LED is turned on, due to its nonlinearity, the weak change of the power supply will cause a sharp change in the LED current, resulting in temperature.

Peru - Installation and training for Integrating Sphere Test System

Peru - Installation and training for Integrating Sphere Test System

This customer is a relatively large laboratory in Peru, and has purchased a set of LPCE-2 High Precision Spectroradiometer Integrating Sphere System from LISUN recently. They had purchased some other equipment from LISUN before, and are very satisfied with our equipment. So they are willing to place this order from LISUN again this time. More details about LPCE-2 test system, please refer to: https://www.lisungroup.com/product-id-340.html

As normal, LISUN engineer visit the customer company to do the installation and training this time. The customer are very satisfaction that we can provide on-site installation and training services. Our engineer is young, professional and have affinity. His service is highly recognized by customer. Looking forward to more cooperations in the near future.

Below is photo of the installation and training:

[caption id="attachment_11391" align="alignnone" width="900"] Figure 1: Group photo in front of LISUN LPCE-2 High Precision Spectroradiometer Integrating Sphere System[/caption]

Lisun Group is lead in CFL & LED Test Instruments. Our main products are Goniophotometer, Spectroradiometer, Integrating Sphere, LED Test Instruments, CFL Test Instruments, Photometer and Colorimeter, EMC & EMI Testing,Electronic Ballast Tester, Electrical Safety Testing, Environmental Test Chamber, Plug and Switch Testing, AC and DC Power Supply and etc.

DC Electronic Load 2

M9822/M9822B is newly designed circuit adopts rapid AD and DA technology to achieve rapid measurements with high accuracy. And the resolution of 0.1mV/0.1mA can effectively display the minor change of voltage and current, so the instrument has a wider application field and achieves better test results. Meanwhile your operation becomes much more comfortable and easy by equipping the high-light VFD, the simple menu and displayed contents and the operation state indicators on all keys. Otherwise the complete and humanized test functions will greatly improve your productivity.

The new CR-LED test mode can be a real simulation of LED light features set by the increase in the diode turn-on voltage, fully simulate the working principle of the diode, so that the test voltage and current to achieve a normal and stable value, to avoid the traditional fixed resistor modeunder voltage and current instability or shock, the real reflect the LED drive power load situation.

The new series electronic load meets the experimental research requirements of product research and the test requirements of production line for industries such as LED-drive power, switch power, power transformer, charger, storage battery.

Specifications:
•Input voltage: 0~150V(M9822) or 0~500V(M9822B); Input current: 1mA~30A; Input power: 300W
•CR-LED measurement mode, fully simulate the load characteristics of LED power
•High-light and high-visibility VFD display
•High resolution of 0.1mV and 0.1mA
•Test functions of OCP and OPP can accurately capture critical parameters
•Modes of CC, CV, CR, CP
•Battery test mode can automatically record the discharge time and the capacity
•The dynamic transition time of 0.1mA can effectively detect the power dynamic response.
•List test can flexibly set test mode and time and finally judge the test result
•Remote test function and multiple groups of data storage

Characteristics of LISUN GDJS series High and Low Temperature Humidity Chamber

Characteristics of LISUN GDJS series High and Low Temperature Humidity Chamber

LISUN GDJS series High and Low Temperature Humidity Chamber is according to IEC60068-2-1 (GB/T2423.1) and IEC60068-2-2 (GB/T2423.2). It is used to test the CFL/LED which meets IES LM-80-08, electricity products, electronic components, material and so on.

There is some other manufacturers in China also produce High and Low Temperature Humidity Chamber, and our equipment is mainly different from the following four points:

(1) Display temperature: We use Schneider or Omron's relay. And the temperature that can be reached is the temperature under load. But many manufacturers refers to the temperature without load. If under load, the temperature must be different from the original temperature.
(2) Water purification device: To generate humidity inside the equipment, there must be distilled water. And there is a water purification device in our High and Low Temperature Humidity Chamber, so we can use tap water directly, to save the cost of distilled water. But many other manufacturers do not have water purification device in the machine.
(3) Temperature sensor: We use electronic temperature sensor, which can use for long time; while other domestic manufacturers use wire ball which is very easy to be bad to save costs.
(4) After-sales service: LISUN has engineers who visit our customers to do after-sales service all over the world, and all of our engineers can speak English well, so the after sales service is easy for us.

All of LISUN products are fully meet the international lighting standards, not just the GB. The quality of the equipment would be relatively high. For more details about the product, please refer to: https://www.lisungroup.com/product-id-313.html

LISUN Hold a lighting Technology Salon in Iran

LISUN Hold a lighting Technology Salon in Iran

LISUN engineer went to Iran in December 2018 to provide on-site installation & training services for customers there. And held Lighting Testing Technology Salon on 25th afternoon and 26th afternoon. LISUN senior engineer Mr. Jacky Jiang shared the following topic there:

1. How to get improve the lumen test accuracy in integrating sphere
2. How to update your LED driver design to meet the EMC and EMI request
3. How to solve the LED heating or high temperature issue to extend the LED life (lumen maintenance)
4. How to get the IES file to use in DiaLux
5. The latest IEC/CIE and American lighting standard.
6. The Lighting Test Instruments from LISUN

Below is the photos of the Lighting Testing Technology Salon:

[caption id="attachment_11361" align="alignnone" width="900"] Figure 1: Group photo of our engineer and the customers on 25th[/caption]

[caption id="attachment_11362" align="alignnone" width="900"] Figure 2: Group photo of our engineer and the customers on 26th[/caption]

[caption id="attachment_11363" align="alignnone" width="992"] Figure 3: Jacky is sharing technology with the customer[/caption]

[caption id="attachment_11364" align="alignnone" width="900"] Figure 4: Jacky is sharing technology with the customer[/caption]

Lisun Group is lead in CFL & LED Test Instruments. Our main products are Goniophotometer, Spectroradiometer, Integrating Sphere, LED Test Instruments, CFL Test Instruments, Photometer and Colorimeter, EMC & EMI Testing,Electronic Ballast Tester, Electrical Safety Testing, Environmental Test Chamber, Plug and Switch Testing, AC and DC Power Supply and etc. Lisun Group wins thousands of customers’ trust with motto “Right Product, Right Price and Right Service”. Please learn more products here: https://www.lisungroup.com/article-id-47.htmlhtml

LISUN Hold a lighting Technology Salon in Saudi Arabia

LISUN engineer went to Saudi in December 2018 to provide on-site installation & training services for customers there. During the period, we held a lighting testing technology salon in our engineer’s Hotel in Riyadh. LISUN senior engineer Mr. Jacky Jiang shared the following topic there:

1. How to get improve the lumen test accuracy in integrating sphere
2. How to update your LED driver design to meet the EMC and EMI request
3.How to solve the LED heating or high temperature issue to extend the LED life (lumen maintenance)
4. How to get the IES file to use in DiaLux
5. The latest IEC/CIE and American lighting standard.
6. The Lighting Test Instruments from LISUN

The sharing session was very successful, below is the picture of the sharing session:

[caption id="attachment_11355" align="alignnone" width="900"] Figure 1: Customers are learning the technologies shared by LISUN engineer[/caption]

[caption id="attachment_11356" align="alignnone" width="900"] Figure 2: The customers who visit the Solon[/caption]

Lisun Group is lead in CFL & LED Test Instruments. Our main products are Goniophotometer, Spectroradiometer, Integrating Sphere, LED Test Instruments, CFL Test Instruments, Photometer and Colorimeter, EMC & EMI Testing,Electronic Ballast Tester, Electrical Safety Testing, Environmental Test Chamber, Plug and Switch Testing, AC and DC Power Supply and etc. Lisun Group wins thousands of customers’ trust with motto “Right Product, Right Price and Right Service”. Please learn more products here: https://www.lisungroup.com/article-id-47.html