Tuesday, March 24, 2020

LSG-5000 Goniophotometer is Designed According to EN 13032-16.1.1.3 Goniophotometer type 3

The full name of EN13032-1 is Light and lighting Measurement and Presentation of photometric data of lamps and luminaires. It is edited by CEN in 2004. This standard is a guide to procedures referring where necessary to the relevant CIE, ISO and CEN publications . We will introduce the clause 6.1.1.3 Goniophotometer type 3 in this article.

The following is the original content of EN 13032-1 6.1.1.3 Goniophotometer type 3.

6.1.1.3 Goniophotometer type 3

The light source is rotated around a vertical axis, a mirror arrangement around a horizontal axis. The photometer head is fixed.

The mirror shall not limit the view of the light source from the photometer head and to be plane. They should have a spectrally constant reflectance or their spectral reflectance shall be considered for the V(λ) correction of the used photometer head. Attention shall be paid to the polarization of the radiation due to reflection by the mirrors and the local situation of the reflection.

The goniophotometer of type 3 can be distinguished as follows:

1) Type 3.1:
a ) centre of mirror in rotation center;
b ) light source is rotated around the mirror on a fixed radius.

2) Type 3.2:
a ) light source in rotation center;
b ) the mirror is rotated around the light source on a fixed radius.

3) Type 3.3:
Light source and mirror are led on two oppositely orientated fixed radius around the rotation center.

LISUN designed the LSG-5000 Moving detector goniophotometer according to the EN 13032-1 Clause 6.1.1.3 standard. The measuring distance is from 5m to 30m. It can measure all types lighting sources, LED or HID luminaries such as indoor and outdoor luminaries. Roadway luminaries, street lamps, flood lights and other kinds of luminaries. And we also designed different kinds of dimension goniophotometer according to different sizes of tested samples. We will update the software and testing parameters according to the updating of the EN 13032-1 standard.

The following is the picture of LSG-5000 Goniophotometer:


LSG-5000CCD Moving Detector Goniospectroradiometer

The following is the video of LSG-5000 Goniophotometer:



Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Spectroradiometer, Integrating Sphere, LED Test Instruments, CFL Test Instruments, Photometer and Colorimeter, EMC & EMI Testing, Surge Generator, Electrical Safety Testing, Environmental Test Chamber, IP Waterproof Test Equipment, Dustproof Test Chamber, High and Low temperature Humidity Chamber, Plug and Switch Testing, AC and DC Power Supply.


Please feel free to contact us if you need any support.

Tech Dep: Service@Lisungroup.com, Cell/WhatsApp: +8615317907381
Sales Dep: Sales@Lisungroup.com, Cell/WhatsApp: +8618917996096

GDJS/GDJW High and Low Temperature Humidity Chamber is Designed According to IEC 60068-2-1 Environmental Testing Part 2-1: Tests-Test A: Cold

The full name of IEC 60068-2-1 is Environmental Testing Part 2-1: Tests-Test A: Cold. It is edited by the IEC technical committee in 2008.We will introduce the IEC 60068-2-1 Environmental Testing Part 2-1: Tests-Test A: Cold

The following is the original content of IEC 60068-2-1

IEC 60068-2-1 Environmental Testing Part 2-1: Tests-Test A: Cold

This part of IEC 60068 deal with cold tests applicalbe to both non heat-dissipating and heat-dissipating specimens. For non heat-dissipating specimens, Tests Ab do not deviate essentially from earlier issues. Test Ae has been added primarily for testing equipment that requires being operational throughout the test, including the conditioning periods.

The object of the cold test is limited to the determination of the ability of components, equioment or other articles to be used, transported or stored at low temperature.

Cold tests cover by this standard do not enable the ability of specimens to withstand or operate during the temperature variations to be assessed. In this case, it would be necessary to use IEC 60068-2-14.

The cold tests are subdivided as follows:

- Cold tests for non heat-dissipating specimens

. with gradual change of temperature, Ab;

- Cold test for heat-dissipating specimens

. with gradual change of temperature, Ad,

. with gradual change of temperature, specimen powered throughout, Ae.

The procedures given is this standard are normally intended for specimens that achieve temperature stability during the performance of the test procedure.

LISUN designed the GDJS/GDJW High and Low Temperature Humidity Chamber according to the IEC 60068-2-1 standard. It is used to test the CFL/LED which meets IES LM-80-08, electricity products, electronic components, material and so on. We will update the procedure and testing parameters according to the updating of the IEC 60068 standard.
    
The following is the picture GDJS/GDJW High and Low Temperature Humidity Chamber

    
The following is the video of GDJS/GDJW High and Low Temperature Humidity Chamber


Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Spectroradiometer, Integrating Sphere, LED Test Instruments, CFL Test Instruments, Photometer and Colorimeter, EMC & EMI Testing, Surge Generator, Electrical Safety Testing, Environmental Test Chamber, IP Waterproof Test Equipment, Dustproof Test Chamber, High and Low temperature Humidity Chamber, Plug and Switch Testing, AC and DC Power Supply.


Please feel free to contact us if you need any support.

Tech Dep: Service@Lisungroup.com, Cell/WhatsApp: +8615317907381
Sales Dep: Sales@Lisungroup.com, Cell/WhatsApp: +8618917996096

Monday, March 23, 2020

IK01-10 IK Level Tester is Designed According to IEC 60068-2-75

The full name of IEC 60068-2-75 is Environmental testing-Part 2-75: Tests- Test Eh: Hammer tests. It has been prepared by IEC technical committee 104:Environmental conditions, classification and methods of test. We will introduce the IEC 60068-2-75-1 Scope

The following is the original content of IEC 60068-2-75-1.

IEC 60068-2-75-1 Scope

This part of IEC 60068 provides three standardized and coordinated test methods for determining the ability of a specimen to withstand specified severities of impact. It is used, in particular, to demonstrate an acceptable level of electrotechnical items. It consists of the application to the specimen of a prescribed number of impacts defined by their impact energy and applied in the prescribed directions.

This part of IEC 60068 covers energy levels ranging from 0.14J (joules) to 50J(joules).

Three types of test apparatus are applicable to perform these tests. Annex C provides some guidance to this aspect.

LISUN designed the IK01-10 IK Level Tester according to the IEC 60068-2-75 standard. Because most of luminaires manufacturers are requested to do IK level test. The different IK ratings relate to the ability of an enclosure to resist impact energy levels measured in joules(J).  IEC 62262 specifies the quantity and distribution of the test impacts and the impact hammer to be used for each level of IK rating. We can also design other kinds of level tester according to the customers’ requires.

The following is the picture of IK01-10 IK Level Tester


The following is the video of IK01-10 IK Level Tester



Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Spectroradiometer, Integrating Sphere, LED Test Instruments, CFL Test Instruments, Photometer and Colorimeter, EMC & EMI Testing, Surge Generator, Electrical Safety Testing, Environmental Test Chamber, IP Waterproof Test Equipment, Dustproof Test Chamber, High and Low temperature Humidity Chamber, Plug and Switch Testing, AC and DC Power Supply.


Please feel free to contact us if you need any support.

Tech Dep: Service@Lisungroup.com, Cell/WhatsApp: +8615317907381
Sales Dep: Sales@Lisungroup.com, Cell/WhatsApp: +8618917996096

How to test LED fixture for startup, rise time and flicker

In recent years, the LED market has been expanding, which is attributed to the unique characteristics of LED solid-state lighting products, such as good luminous efficiency, long service life and high reliability .Therefore, LED solid-state lighting products are increasingly favored by the market and consumers. But at the same time, because of the fast response speed of LED and the lack of thermal inertia and afterglow effect of traditional lamps, the LED is deeply affected by the current fluctuation, which directly affects the output of light flux.

The flicker of light source is the external reflection of the change of light flux. Therefore, the flicker of LED lighting products has attracted people's attention. In this regard, on December 14, 2012, the European Union (EU) officially issued regulation NO. 1194/2012 in its official gazette, "implementation details of directive NO. 2009/125/EC of the European parliament and the European council on ecological design requirements for directional lights, LED lights and related equipment". According to the European commission (EC) regulation NO244/2009 issued on March 18, 2009,the European parliament and the European council directive 2005/32/EC on the implementation of ecological design requirements for nondirectional household lamps, so far the eu has formed a complete mandatory ecological design requirements for LED lamps. Start-up time and rise time, as two indexes of functional requirements, are paid more and more attention by manufacturers in the industry.

We just talked about the flicker effect of LED lighting, but most of people don't know what it means. The essence of light source flicker is the fluctuation of light flux. Driven by ac or pulse dc, the light flux, illuminance or brightness of the light source change correspondingly with the periodic change of current amplitude. Human eyes and human brains react subjectively to this change. Usually, Flicker can be divided into Visible Flicker and Invisible Flicker according to people's feelings. When the frequency is more than 100Hz, the human eye cannot feel the flicker phenomenon, but it will still cause eye fatigue, headache, etc. This is the yan shan effect, which is generally believed to exist within 500Hz. For this purpose, ENERGY STAR lamps V1.0 draft 4 specifies the conditions for flickering used for all lamps and lanterns in the dimming performance requirements.

 As shown in the figure below:
How to test led fixture for startup, rise time and flicker

The allowed range of light source flicker is:

1. The frequency is not less than 120Hz;
2. F1<0.001 X frequency within the frequency range of 120hz-800hz
3. There is no requirement for F1 when the frequency is greater than 800Hz;
4. If the frequency is uncertain, PF<30%;

In addition, the output frequency of compact fluorescent light should be 20-30khz, or greater than 40KHz.

The essence of light source flicker is the instability of light flux. When detecting the fluctuation of light source with time, the change curve of brightness can be tested, and the change curve of light flux or illumination can be tested under the same conditions. ENERGY STAR (V1.0) specifies the measurement requirements of flicker:

1. Power supply and measuring instruments shall meet LM-79-08 requirements;
2. Multi-channel oscilloscope with storage function, and attenuation probe can be added when necessary. The sampling rate is greater than 2kHz and the sampling time is greater than 100ms.
3. Photometric probe, V(in)correction, and the corresponding time should meet the requirements;
4. For absolute photometry :to measure the absolute value ,a sphere of integration Is required; For relative photometry: ensure that the detector is able to measure relative light output and only receives light from the light to be measured.
5. Before measurement, the compact fluorescent lamp shall be aged for 100 hours, and it shall be preheated before measurement. LED lights do not need to be old, the ambient temperature is 25+/-5 degrees.

In order to meet the EU Erp energy efficiency index requirements, as well as IEC60969S self-ballasts for general lighting safety requirements and energy star requirements, LISUN developed LSRF-3 lamps start, rise time and flicker test system, in order to meet the LED lamps start time, rise time instrument strobe flash test requirements.

Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Spectroradiometer, Integrating Sphere, LED Test Instruments, CFL Test Instruments, Photometer and Colorimeter, EMC & EMI Testing, Surge Generator, Electrical Safety Testing, Environmental Test Chamber, IP Waterproof Test Equipment, Dustproof Test Chamber, High and Low temperature Humidity Chamber, Plug and Switch Testing, AC and DC Power Supply.


Please feel free to contact us if you need any support.
Tech Dep: Service@Lisungroup.com, Cell/WhatsApp: +8615317907381
Sales Dep: Sales@Lisungroup.com, Cell/WhatsApp: +8618917996096

Thursday, March 19, 2020

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.

Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Spectroradiometer, Integrating Sphere, LED Test Instruments, CFL Test Instruments, Photometer and Colorimeter, EMC & EMI Testing, Surge Generator, Electrical Safety Testing, Environmental Test Chamber, Waterproof Test , Dustproof Test Chamber, High and Low temperature Humidity Chamber, Plug and Switch Testing, AC and DC Power Supply.


Please feel free to contact us if you need any support.

Tech Dep: Service@Lisungroup.com, Cell/WhatsApp: +8615317907381
Sales Dep: Sales@Lisungroup.com, Cell/WhatsApp: +8618917996096

Brief introduction of CE certificates

In recent years, the CE marks are more and more widely used in the market of European economic area (Member states of the European Union and the European Free Trade association, except Switzerland). More customs of different countries set out the requirements of CE certification for imported products. Exporter will be in trouble as well as unnecessary loss if their shipping goods don’t have CE certified label. So, what is the importance of CE certification? What are the forms of CE certification so far? And what are the risks of products that has not been certified by CE?

1. The importance of CE certification

The CE mark on the packaging indicates that it meets the requirements of a series of European directives such as safety, sanitation, environmental protection and consumer protection. In the past, EC(European Community)countries require differently for import and sale of products. The goods which are produced according to national standards may not be on the market. As part of the efforts to eliminate trade barriers, CE came into being at that time. Therefore, CE can be understood as CONFORMITY WITH EUROPEAN (DEMAND) (in Europe).

The meaning of the CE mark is as the following: Using CE acronym as symbol shows products which affix the CE mark meet the main requirements of relevant provisions of the European Directive (Essential Requirements),and it’s also used to verify that the products have passed the conformity assessment procedure or the manufacturer’s declaration of conformity. The CE mark is truly as a passport for the products being allowed to enter the European market. For industrial products which must affix CE mark according to relevant instructions, they can be in the market without CE mark, or they must be taken back if they don’t meet safety requirements but with CE mark and in the market. For industrial products which must affix CE mark according to relevant instructions, they can be in the market without CE mark, or they must be taken back if they don’t meet safety requirements but with CE mark and in the market. Moreover, the products will be restricted and prohibited from entering the EU market or forced to withdraw from the market if they violate CE mark instructions in European Directive.

The most important function of CE is to ensure the safety of the products and ensure the products work well under the conditions of the European union. CE mark like a tickets for products entering the European market, if products are not certified by CE, it’s most likely to be seized of by European customs and cause exporters’ unnecessary losses.

2. Advantages of CE certification

The import of CE certified electronic instruments and equipment can effectively avoid the following risks:

 The risk of being detained and investigated by the customs;
 The risk of being investigated and dealt with by the market supervision institution;
 The risk of being charged by competitor for other purpose;
The import of CE certified electronic instruments and equipment has the following advantages:
 The import of CE certified equipment can avoid a lot of trouble in the import and export because the laws, regulations as well as standards of EU are not only numerous, but also very complex;
 It can enhance the reliability of their product performance by using CE certified equipment for testing or production. It also can effectively prevent the emergence of irresponsible allegations;
 The CE certificate of the institution designated by European Union will be the important evidence with legal effect when you are facing to litigation;

For electronic equipment and testing equipment, there is a very important parameter ” EMC test” when the products are doing CE certification. Because the power grid frequency, voltage in Europe countries are differen from China Mainland, these products are likely to be damaged in the course of use if not detected. At the same time, there are many interference factors such as pulse group, lightning surge interference, voltage dip and so on. If there is no CE certification, the equipment is likely to be damaged and can’t be used normally.

3. Current forms of CE certification in China mainland

At present, there are three kinds of domestic CE certification as following:

A:Only certified certificate, no test report:
This type of certificate is almost invalid and cannot be queried on the appropriate website. Products with this certification mark can’t be recognized as ticket to the European market. Products with this kind of certificate is equivalent to the product without CE mark, and they should be detained or even returned.

B: Certificate of compliance / Certificate of compliance, with test report:
This type of certificate is issued as a statement of conformity by the third party Agency (agency or test certification body). The test reports and other technical documents TCF should be enclosed by this kind of certificate. At the same time, enterprises also have to sign the<declaration of conformity>. This type of certification report is only recognized in mainland China. Although there are the test report and related certificates according to the requirement, the relevant information can only be checked on the detection of the company’s own website. But many such testing company themself do not comply with EU certification requirements. The certificate is only applicable to the manufacturer for product quality self inspection, there is also a greater risk of being detained by the customs ana cause fines and delivery delays. This will affect the normal use of products. This kind f certificate is shown in the following figure :


C: EC Attestation of conformity < EU standard compliance certificate >
This type of certificate is issued by the EU notified body (Notified Body known as NB). According to EU regulations, only the NB are eligible to issue EC Type CE Declaration.

This type of certificate and test report are issued by testing organization certified by EU. The products finish the complete testing during the certification process and has a complete test report. Meanwhile, certificate No. can be found in the appropriate Website. Only these electronic equipment which has finished the testing and certification can be exported to EU and can get CE label. All of Lisun series devices do CE certification in such bodies certified by European Union, and has integrated <EU standard compliance certificate> and corresponding test report. Certificate template is shown in the following figure:



Lisun is lead in designing and producing high quality, high precision, high performance products to Europe and customers from all over the world. Lisun applied the first CE certification at the beginning of entering the European market and provide long-term excellent quality services for European customers. When the CE certificate expires, Lisun immediately contact the top certification bodies to do.

Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Spectroradiometer, Integrating Sphere, LED Test Instruments, CFL Test Instruments, Photometer and Colorimeter, EMC & EMI Testing, Surge Generator, Electrical Safety Testing, Environmental Test Chamber, IP Waterproof Test Equipment, Dustproof Test Chamber, High and Low temperature Humidity Chamber, Plug and Switch Testing, AC and DC Power Supply.


Please feel free to contact us if you need any support.

Tech Dep: Service@Lisungroup.com, Cell/WhatsApp:+8615317907381
Sales Dep: Sales@Lisungroup.com, Cell/WhatsApp:+8618917996096

Wednesday, March 18, 2020

Darkroom Design for a Goniophotometer

As the most important part of the lighting test, the main function of the goniophotometer is to measure the absolute luminous intensity. At the same time, it can measure other parameters such as lumen and illuminance. Because of the different testing principle, compared with the integrating sphere spectroradiometer system, the device is more suitable for the measurement of the overall luminaire.

Carrying the measurement with goniophotometer, the standard darkroom is needed. If the darkroom does not meet the requirements, it is likely to affect the final test results, which will lead to the deformation of distribution curve and the inaccurate results of lumen. And the final IES file will not meet the requirements, that will affect the final test results.

According to the requirements of the test environment in LM-79 and CIE-70, this paper makes a brief introduction to the selection of darkroom:

Temperature requirements:

According to the requirements of CIE-70 and LM-79, when carrying the measurement with goniophotometer, the ambient temperature should be around 25°. For the light source with obvious influence on the temperature, the temperature tolerance should be ±1°and the other light sources are ±3°. If the test is carried out at different ambient temperatures, the temperature should be stated.

In order to meet the requirements of test environment, it is usually required to install air-conditioner in the darkroom to control the temperature. At the same time, a thermometer with a precision of 0.01°is needed to use to calibrate the temperature.
Stray light requirements:

Stray light has a bad effect on the test results, so it is recommended that the diaphragm should be used between the light source and the photometric probe to prevent stray light, but the diaphragm mustn’t block the direct light between the probe and the light source.

It is possible to determine the ratio of stray light by placing a minimum possible size screen in the middle of the light source and the photometric probe. The screen blocks the direct light from the light source to the photometric probe.

The test of light intensity distribution should be repeated when the screen is in the corresponding position. The measurement signal at this time is the signal of direct stray light, which should be subtracted from the test result without this screen.

In general, the biggest influence on the test results is the stray light, which will directly lead to the test result of the light intensity distribution curve is not accurate, then the IES or LDT file will not be used naturally. According to the requirements of the standard, the installation principle of the diaphragm is as follows:

Darkroom Design for a Goniophotometer
According to different models of goniophotometer and different size of customers’ darkroom, Lisun engineers will design the different size diaphragm for customers.
Darkroom Design for a Goniophotometer
LSG-2000 Goniophotometer with Rotating Mirror
Darkroom Design for a Goniophotometer LSG-1700B High Precision Rotation Luminaire Goniophotometer

Requirements for darkroom wall painting:

According to the standard, in the actual test, there is only one light source to be measured in the darkroom. In this case, if the room wall is bright color, or white,or the use of reflective coatings, it will cause stray light to affect the test results. When sending drawings to customers, Lisun usually asks customers to use the matt black coating to paint all the walls. It’s important to note that the most important wall in the darkroom is the wall facing the photometric probe, which is usually the wall behind the goniophotometer host. Stray light will be directly detected in the probe if there is stray light.

Darkroom size requirements:

According to LM-79 and CIE-70 requirements, the length of test optical path should be at least for more than 5 times of the diameter of the longest dimension of the test lamp. It means that if the maximum size of the measured light is 1.2 meters, the length of the optical path should be at least 6 meters and plus the position of host and probe, the whole darkroom length should be at least 8 meters. A standard darkroom can guarantee the test accuracy.

The above four requirements are the basic points that the user must pay attention in the preparation of the darkroom. LISUN will also design the darkroom for all customers, and help customers rectify the darkroom to ensure a standard test environment. At the same time, all of LISUN’s LSG-1700B/1800B/2000/3000/5000 goniophotometer are equipped with a constant temperature probe with high precision. Under this premise, when customers prepare temperature control system for darkroom, they can only consider the temperature control system of lamp position, which can greatly save the cost.

The following is the design of standard darkrooms:

Darkroom Design for a Goniophotometer

Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Spectroradiometer, Integrating Sphere, LED Test Instruments, CFL Test Instruments, Photometer and Colorimeter, EMC & EMI Testing, Surge Generator, Electrical Safety Testing, Environmental Test Chamber, Waterproof Test , Dustproof Test Chamber, High and Low temperature Humidity Chamber, Plug and Switch Testing, AC and DC Power Supply.


Please feel free to contact us if you need any support.

Tech Dep: Service@Lisungroup.com, Cell/WhatsApp:+8615317907381
Sales Dep: Sales@Lisungroup.com, Cell/WhatsApp:+8618917996096