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.

How to effective to measuring LED lamp Start, Run up time and Flicker

How to effective to measuring LED lamp Start, Run up time and Flicker

Due to the LED solid-state lighting products have good luminous efficiency, long life and high reliability unique characteristics, so it's became more popular by markets and customers. But at the same time, the LED solid lighting have fast response characteristics, it haven’t thermal inertia and afterglow effects, like traditional lamps, so it have big influence by current fluctuations, the current fluctuations affect the luminous flux output directly, the lighting flashing is the external expression of luminous flux change, that caused more and more people focus on lighting flashing issue. Dated 14th December, 2012, the EU officially released the (EU) NO 1194/2012 rules <Implementing rules of the European Parliament and the EU Council Directive 2009/125/EC on the eco-design requirements of directional lights, LED lights and related equipment requirements>.Compared with <European Parliament and Council Directive 2005/32/EC implementing rules for non-directional household lamps eco-design requirements> which posted by the European Commission Regulation (EC) NO 244/2009 Regulations dated 18th March, 2009, the new rules have complete mandatory and eco-design requirements. Start and Run-up time as the two indicators functional requirements in the industry has been more emphasis by manufacturers.

We just talked about the LED solid lighting product's flicker effect, many people have no idea about this. The light source flashing is directly expression of luminous flux fluctuation, the light source is driving by AC current and pulsed DC current, luminous flux, illuminance or brightness change accordingly with the current amplitude of cyclical change. Normally, according to human eyes feeling, the flicker divided into Visiable Flicker and Invisible Flicker. When the frequency more than 100Hz, the human eyes can’t feeling the flicker, but it will cause eyestrain, headache etc, this is the flash effect, generally agreed that the flicker effect exists within 500Hz. For this issue, America Energy Star(ENERGY STAR lamps V1.0 draft 4 In the dimming performance requirements specified in the blink Conditions to be fulfilled, use all tools). As below figure:



Light source flashing allowed range:

1、Frequency less than 100Hz;
2、Within 120Hz-800Hz frequency range, the F1<0.001 X frequency;
3、Frequency more than 800Hz, F1 have no requirements;
4、Frequency is uncertain, PF<30%;
Besides, the CFL lamp output frequency range should at 20-30KHz, or more than 40KHz.

The nature of light source flicker is luminous flux output fluctuations. When measuring light fluctuates with time change, not only the brightness curve can be tested, but also can test luminous flux curve or illumination curve which are under the same conditions. ENERGY STAR（V1.0）make the rules to measuring flicker’s requirements:

1、Power and instrumentation are need meet the requirements of LM-79-08;
2、Multi-channel oscilloscope with memory function, necessary need to add attenuation probe. The sampling rate is more than 2kHz, the sampling time is more than 100ms;
3、Photo detector V(入) Correction, and need meet the requirements of the corresponding time;
4、For the absolute value of the metering(absolute photometry): Need use integrating sphere when measuring of the absolute value; For relative value metering(relative photometry): To ensure that the detector is capable of measuring the relative light output, and only receives light from the light source to be measured;

Before measuring, the CFL lamps need light on 100 hours at least and it’s need preheat before testing. LED lamp needn’t lighting on, the environmental temperature range should at 25+/-5 degrees.

To meet EU ErP rules and Energy Star requirements, Lisun developed LSRF-2 Lamp Start, Run-up time and Flicker Test System. The hardware of this system included PH3000 Transient Photometer, LSP-500VAC Programmable AC Power Source Meter, IS-MA series Integrating Sphere, DC3005 DC Power Source and SLS series Standard Lamp; the software of this system included LST-3000 Lamp Start and Run-up Time Test and FLK-3000 Lamp Flick Test. PH3000 Transient Photometer is developed base on rapid sampling techniques, it’s fully meet EU and Energy Star relevant requirements. Combined with computer, it can measuring and record the fast change luminous flux waveform and others parameters. PH3000 applied with 12 Bytes, the maximum sampling rate of 10M Hz high-speed A / D. The PH3000 also can used as common illuminometer which can be widely used in light flux, brightness, illumination, etc. photometric detection and measurement. LSP-500VAC Programmable AC Sine Wave Power Source is a high-power, low pure sine wave distortion, high stability, integrated power supply source table, it’s especially suitable for as test power supply of electronic ballasts, energy saving lamps and other small power household appliances. And this system also included IS-1.5MA Integrating Sphere, DC3005 DC Power Source and SLS-50W Standard Light Source.

Wire and cableFlame Tester

Description:

 

Wire and cable Flame Tester is used to test and evaluate the combustion characteristics of single insulated wires or cables. This equipment meets the requirements of IEC60332-1-1、GB18380.11/12-2008、GB18380.1-2001、IEC60335-1(GB4706.1). The product tank shell is irony spray, and is resistant to smoke corrosion, the digital meter shows time. This device has beautiful appearance, is easy to use and has reliable performance.

 

Specification:

 

1. Flame box: size of box: W300xH1200xD450mm


2. Gas: High purity propane gas or petroleum liquefied gas (user-supplied)


3. Tested wire and cable length: 600±25mm


4. Tested wire and cable outer diameter: conductor diameter > 0.8mm or cross-sectional area > 0.5mm²


5. The flame should be continuously burned: Burning time:0.1-999.9s ( continuously set)


6. Gas Flow: 0.03~0.3ml/Min


7. Air Flow: 3-30L/min


8. Box material: irony spray


9. Burning lamp standard power : 1KW


10. Customer need to prepare air compressor


11. Power supply and voltage: AC 220V 50HZ 5A

Similarities and Differences between Photometric Measurements of Goniophotometer and Integrating Sphere for Solid State Lighting Products

Similarities and Differences between Photometric Measurements of Goniophotometer and Integrating Sphere for Solid State Lighting Products

According to the requirements of the LM-79 optical testing standards applicable to the widest range in the world, although there are many photometric measurements for light sources and lamps are available, but these standards are dedicated to the measurements for light sources and lamps. Because the form of current SSL products are lamps or luminaires, and LED in the luminaires is not easy to be replaced or separated, the existing standards cannot be directly applicable to SSL products, which requires the use of absolute photometry measurements. The photometric information required for SSL products is usually the total luminous flux (lm), luminous efficiency (lm/W), luminous intensity (Candela) in one or more directions, chromaticity coordinates, correlated color temperature and color rendering index.

There are two kinds of photometric measurement methods in LM-79: integrating sphere + spectroradiometer (or photometer); goniophotometer. Each of these two test systems has its own advantages and disadvantages. For different SSL (solid state lighting products), users can make their own choice. Two test methods for environmental temperature, air flow, power supply have specific requirements, please refer to the contents of LM-79 2.0~8.0.

For Integrating Sphere System:

Integrating sphere system is suitable for integrating LED lamps and relatively small LED light sources to measure total luminous flux and colorimetric parameters. Integrating sphere system has the advantages of fast measuring speed and no need darkroom.

The air flow inside the sphere can reach the minimum, and the temperature inside the sphere is not easily affected by the potential airflow in the temperature control room. However, the test temperature in the integrating sphere still needs to meet the requirements of temperature in LM-79 2.0~8.0. Lisun recommends using IS-XXMT series constant temperature integrating sphere to control the test temperature to 25°inside the sphere.

There are two use ways of integrating sphere, one is V(λ) corrected photometric detector, and the other is spectrum analyzer. Because the integral sphere photometer has V(λ) spectral response deviation, the first method will produce spectral mismatch error, and the second method has no spectral mismatch error theoretically. So now most of the widest spectrum system use spectroscopy measurement in the market, and Lisun recommends LMS-9000B using spectroscopy with spectrophotometric method modified after years of research and development, and if equipped with IS-XXMT constant temperature integrating sphere, it can guarantee the test precision.



When choosing the size of integrating sphere, it needs to take into account the power and shell size of SSL products. In general, for compact lamps, 1m integrating sphere can be chosen. But if the lamp power is more than 500W, 2m integrating sphere may be suitable.

In the choice of integral ball size, while taking into account the needs of power and shell size of SSL products, usually for compact lamps can choose integral ball 1 meter, and when the lamp power is more than 500W need to consider the use of integral ball 2 meters. At the same time, if using 4π test mode, the surface area of tested lamp needs to be less than 2% of the area of sphere reflective coating, such as for a 2m integrating sphere, it can only be used to test lamps no more than 30CM in length. When testing the lamp tube or the strip lamp, the length of the lamp cannot exceed 2/3 of the diameter of the integrating sphere

There is another very important step in the use of integrating sphere spectroradiometer system, that is, the self absorption correction. The response of the sphere system changes due to the absorption of light by the luminaire inside the sphere, and the error may occur when the size and shape of the light source are not consistent with the standard light source.

Self absorption correction is critical because the physical size and shape of the SSL product are usually different from the size and shape of the standard lamp. If the self absorption correction is not carried out, the lumen test results will be low.



According to the introduction we find that integrating sphere + spectroradiometer test system can carry the test in a very short time, and do not needs the darkroom, through integrating sphere diffuse reflection, the system can test the total luminous flux of lamps in all directions. But they also have some disadvantages: size of test luminaire should be small, the test result is affected by the standard lamp, and the test procedure is complicated (need to use the auxiliary lamp for self absorption correction), also it needs frequent calibration.

LISUN recommends that users use LPCE-2 (LMS-9000B) spectroradiometer integrating sphere system for testing light and compact lamps. Also after years of development, LPCE-2 system can carry the test automatically, and all parameters can be read via software. With the standard lamp calibrated by LISUN standard laboratory, the test accuracy can be guaranteed.

For Goniophotometer System:

The most important function of the goniophotometer is to test the intensity distribution and to export the IES/LDT file of SSL products, but the lumen parameters of the measured sample can also be obtained by calculation.According to the requirements of LM-79, only vertical goniophotometer with rotating mirror and rotating detector is in compliance with test requirements (e.g. LISUN LSG-3000/5000)



Other types of goniophotometer due to causes a change in the working position of the lamp, generally used in the laboratory is not recommended, but LISUN Rotary Center Goniophotometer LSG-1700B/1800B Series, through the use of high precision constant temperature detector and custom software, can greatly weaken the error.



There are two most obvious advantages of using goniophotometer for photometric measurement:

1.Its test result is absolute value, rather than with the integrating sphere system need contrast conversion by standard lamp. If it is used to test the large lamp, the accuracy will be greatly improved, and there is no need to use additional auxiliary lamp to do self absorption calibration.

2.All optical parameters can be measured by adding spectroradiometer and corresponding detector in the darkroom. And the test data is the parameters of each angle in the space, more convincing.

But in order to realize the multi-function and high-precision measurement, the use of goniophotometer also has many limitations:

1.According to the standard requirements, the distance between the detector and the measured lamp must be at least 5 times of the length of the longest axis of the measured lamp. For the tested lamp with light beam angle, the required length will be longer. For example, if you need to test a 1m lamp, then the length of the darkroom light path needs at least 5 meters, plus the equipment itself rotating and placing position, the overall length of the darkroom needs to reach about 8 meters.

2.Darkroom needs to be brushed using non-reflective black material, any reflective position may have an impact on the test results.

3.It takes longer time (longer testing time than the integrating sphere system) to complete the test.

According to the above description we can see that although the integrating sphere has the advantages of high testing speed, low environmental requirements, but the use of the goniophotometer system, especially goniophotometer system with the photometric detector and spectroradiometer can test all parameters of the SSL products, and also can export the IES/LDT file for the lighting design.

After years of experience and design, LISUN recommends users to test the bulb lamp, T5/T8 lamp, light source, small chip integrated lamps with spectroradiometer + integrating sphere test system (LPCE-2), and to test large lamp, street lamp, HID lamp with goniophotometer system (LSG-5000CCD/LSG-1800BCCD).