Indian- Installation and training for Integrating Sphere Test System

LISUN engineers often visit India to do installation and trainin. The service is recognized by the customers here. This customer is a local famous laboratory. This time they purchased 1 set LPCE-2 (LMS-9000B ) High Precision Spectroradiometer Integrating Sphere System from LISUN. Below is the picture of customer and our engineer after the installation and training:

[caption id="attachment_10755" align="alignnone" width="2000"] Figure 1: LISUN LPCE-2 （LMS-9000B）High Precision Spectroradiometer Integrating Sphere System[/caption]

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.

Columbia - Installation and training for Electrical Safety Tester

This is a large experimental institution in Colombia. They purchased ZRS-3H Glow-wire Test Apparatus, ZY-3 Needle Flame Test, TTC-1 Tracking Test Chamber, HVR-LS Horizontal Vertical Flame Tester and some other electrical safety testers from LISUN this time.

They found LISUN through the website. The price of our equipment is higher than other companies’, but the materials used in our equipment are also better. We can provide on-site installation and training services. Through investigation, they cooperate with us finally. Our equipment and services also didn’t disappoint them.

The following is a group photo of the customer engineer and LISUN engineer (first from the left) after the installation training:

[caption id="attachment_10714" align="alignnone" width="900"] Figure 1: Group photo in front of LISUN ZRS-3H Glow-wire Test Apparatus, ZY-3 Needle Flame Test, TTC-1 Tracking Test Chamber and HVR-LS Horizontal Vertical Flame Tester[/caption]

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.

India- Maintenance for EMI Receiver System

This Indian customer purchased the EMI-9KB EMI Receiver System from LISUN last year. During the visit in India this time, our engineer went to the customer company for product maintenance.

Our engineer is very popular with the customer, and our after-sales service has been highly recognized by the customer. More details for the equipment, please refer to: http://www.lisungroup.com/product-id-331.html

Below is a group photo of our engineer and customer company employees:

[caption id="attachment_10664" align="alignnone" width="400"] Figure 1: Group photo in front of LISUN EMI-9KB EMI Receiver System[/caption]

LISUN 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.

Chile- Installation and training for waterproof test equipment

This is a well-known local testing institution. Through investigation and comparison, they finally selected LISUN. Our equipment is completely in accordance with IEC standards, and after-sales service is guaranteed.

 

When customer place the order, our engineer designed the operation room for them. Soon after the customer received the equipment, we arrange engineer to assist in the installation training. Our after-sales services is appreciated by them. Below is the satisfaction form from them:

 

[caption id="attachment_10643" align="aligncenter" width="558"] satisfaction[/caption]

Finally, we share with you the group photo after the training:

[caption id="attachment_10644" align="aligncenter" width="900"] Figure 1: Group photo in front of LISUN IPX1~IPX8 waterproof test equipment[/caption]

 

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: http://www.lisungroup.com/article-id-47.html

Darkroom Design of goniophotometer

Darkroom Design of 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:



According to different models of goniophotometer and different size of customers’ darkroom, Lisun engineers will design the different size diaphragm for customers.

[caption id="attachment_10634" align="aligncenter" width="800"] LSG-2000 Goniophotometer with Rotating Mirror[/caption]

[caption id="attachment_10635" align="aligncenter" width="800"] LSG-1700B High Precision Rotation Luminaire Goniophotometer[/caption]

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:

 

TTC-1 Tracking Test Chamber 1000

It is according to IEC60695 and IEC60112 (GB4207), the Tracking Test Chamber TTC-1 is intended for determining the degree of protection against formation of conducting paths in solid insulating materials, due to the electric stress and electrolytic contamination of the surface. This method simulates tracking currents on insulation material by providing drops between electrodes. During the process of normal use, insulating material may be exposed to moisture and dirt, if conductive, may cause stress and fire hazard.

[caption id="attachment_8935" align="alignnone" width="500"] TTC-1[/caption]

Specification:
• It applied with rectangle size of platinum electrode, each electrode can force to the sample is 1.0±0.05N
• The testing voltage is 100~600V (48~60Hz) which can be adjustable
• When the short-circuit current in the 1.0±0.1A, the voltage drops will be no more than 10%
• During the testing, the short-circuit current is more than 0.5 A to keep 2 seconds, then shut off current, it will show the sample not pass
• The liquid drop device can make the liquid height from 30~40mm (adjustable), drops liquid size is 44~55 drops/1cm3. The interval drops of liquid is 30S±5S (adjustable)
• Inside dimension: 800x800x800mm and outsize diamension: 1120x520x1250mm (Special size can be ordered as customer's request)

TTC-1 Tracking Test Chamber 750

It is according to IEC60695 and IEC60112 (GB4207), the Tracking Test Chamber TTC-1 is intended for determining the degree of protection against formation of conducting paths in solid insulating materials, due to the electric stress and electrolytic contamination of the surface. This method simulates tracking currents on insulation material by providing drops between electrodes. During the process of normal use, insulating material may be exposed to moisture and dirt, if conductive, may cause stress and fire hazard.

[caption id="attachment_8935" align="alignnone" width="500"] TTC-1[/caption]

Specification:
• It applied with rectangle size of platinum electrode, each electrode can force to the sample is 1.0±0.05N
• The testing voltage is 100~600V (48~60Hz) which can be adjustable
• When the short-circuit current in the 1.0±0.1A, the voltage drops will be no more than 10%
• During the testing, the short-circuit current is more than 0.5 A to keep 2 seconds, then shut off current, it will show the sample not pass
• The liquid drop device can make the liquid height from 30~40mm (adjustable), drops liquid size is 44~55 drops/1cm3. The interval drops of liquid is 30S±5S (adjustable)
• Inside dimension: 800x800x800mm and outsize diamension: 1120x520x1250mm (Special size can be ordered as customer's request)

TTC-1 Tracking Test Chamber 500

It is according to IEC60695 and IEC60112 (GB4207), the Tracking Test Chamber TTC-1 is intended for determining the degree of protection against formation of conducting paths in solid insulating materials, due to the electric stress and electrolytic contamination of the surface. This method simulates tracking currents on insulation material by providing drops between electrodes. During the process of normal use, insulating material may be exposed to moisture and dirt, if conductive, may cause stress and fire hazard.

[caption id="attachment_8935" align="alignnone" width="500"] TTC-1[/caption]

Specification:
• It applied with rectangle size of platinum electrode, each electrode can force to the sample is 1.0±0.05N
• The testing voltage is 100~600V (48~60Hz) which can be adjustable
• When the short-circuit current in the 1.0±0.1A, the voltage drops will be no more than 10%
• During the testing, the short-circuit current is more than 0.5 A to keep 2 seconds, then shut off current, it will show the sample not pass
• The liquid drop device can make the liquid height from 30~40mm (adjustable), drops liquid size is 44~55 drops/1cm3. The interval drops of liquid is 30S±5S (adjustable)
• Inside dimension: 800x800x800mm and outsize diamension: 1120x520x1250mm (Special size can be ordered as customer's request)

How to Use TM-21 to Estimate LED Luminaries Life?

LED has the features of long time. According to different power drivers and use conditions, the life of LED can be up to 50,000 hours pr more. LED will not extinguish directly like other light source but decay gradually. Therefore, luminous decay will lead to output low light after long time use, which will make products not meet requirements. And how to use TM-21 to estimate LED luminaries life?

In order that LED industry persons have a clear concept of TM-21 and learn how to use TM-21 to estimate LED products. We will make 4 programs to explain the application and prediction method of LM-80-08 and TM-21-11:

Step 1: LED components manufacturers do at least 6,000 hours test at 3 temperatures (55C°/85 C°/Optional Temperature) for LED Source (Package/Array/Module) according to LM-80-08.

Required samples number: (Related to the prediction time)



Test Time Requirement (Related to Prediction Accuracy)

At least 6,000 Hours, recommend 10,000 Hours, you should obtain the LED light attenuation information every 1,000 hours, interval time is shorter(such as 500 hours), which can improve the accuracy of the prediction time.

Step 2: Predict 3 test temperatures (55C°/85 C°/Optional Temperature) long life information according to TM-21-11.

Obtain the average value of experiment data at each temperature, the time rules to take test information as follow:

D Test Time(Hour )	Take out the data principle
6,000~10,000	1. Take out the last 5,000 hours to calculate 2. 0~1,000 hours data do not use(LED Unstable Period)
>10,000	1. Take out last 50% that is D/2~D to calculate

Use Exponential Least Squares Curve-Fit to get Slope m and Intercept b, when calculate m and b, the interval is denser if test time is longer, its accuracy will increase and then calculate the value of B and α.

y=mx+b, B=exp(b), a=-m

According to formula, calculate the 70% lumen maintenance life time value at every temperature experiment under ENERGY STAR standard.

L70: Time to 70% lumen maintenance



Use sample number in Step 1 to predict multiple times standard to judge:

Sample Number(Per Temperature)	TM-21 Prediction Multiple Time
≥20ea	6 times of the test time
≥10ea,<20ea	5.5 times of the test time
<10ea	Not applicable for TM-21

Representation: L70(6K) = XX,XXX hours

(6K) : LM-80 Test Time; (6K)=6,000 Hours; (10K)=10,000 Hours

XX,XXX Hours : Sample≧20ea, Test Time=6,000, Predict 6 times to 36,000 hours

Use Exponential Formation to calculate the lumen maintenance of every time, and then draw the prediction life curve at every test temperature according to the calculated data.



Step 3: Obtain In Situ Temperature of this LED devise in LED luminaries.

Please refer to ISTMT(In Situ Temperature Measurement Test) formula to obtain the temperature of LED device in LED lumunaries, this test temperature position must be same with Ts set position of LM-80-08, the temperature data taken out is called TMPLED(LED Temperature Measurement Point).

Step 4: Use the calculation results of TMPLED and TM-21 to do Interpolation calculation, to obtain the estimated life value of TMPLED.

Select two close-in temperature points cladding in TMPLED from 3 test temperature points as calculation datum point.

Calculate Arrhenius Model temperature acceleration parameter A and get Decay Rate: α and Fixed value parameter B0.

Use upper formula to calculate the L70 value of TMPLED, same formula represents the result of TMPLED.

L70(6K) > XX,XXX hours



Set into relevant time value and draw the life time prediction curve of TMPLED and 3 Ts.



Lisun LEDLM-80PL LED Lumen Maintenance and Aging Life Test System is designed according to IES-LM-80 standards. This system combines Arrhenius Model, which can make users predict L30 and L70 etc lumen maintenance by software after hundreds to thousands of hours test.

Lisun Electronics (Shanghai)Co.,Ltd is lead In lighting test equipment, EMI/EMC test system and safety test instrument. Its quality system has been strictly certificated by ISO9001:2008. The Lisun Group products have been authenticated by the third party lab and were by CE certificate. As a CIE supportive membership, all of the test instruments produced by Lisun Group were designed according to CIE standards.