One type of colorimeter named WPA CO7000 is so good that to use. This type is portable, so it is convent .There are some details I have to tell.

Colorimeter is a measurement and used in many of fields. It is a common measure instrument in a lot of companies or plants. One type of colorimeter named WPA CO7000 is so good that to use. This type is portable, so it is convent .There are some details I have to tell.

Usage
The Bookroom WPA CO7000 is a portable colorimeter designed for doctors and medical technologists in small and medium sized clinics.

Easy to use and clean  Colorimeter 
The CO7000 is very easy to use as there are only three buttons (On/Off, Reference and Test)with it. There is a drain hole at the bottom of the cell compartment so that spillages do not affect the instrument. The filters are at 400, 440, 470, 490, 520, 550, 580, 590, 680 and 700nm enabling assays in the wavelength range 400 to 700 nm to be measured. The wavelength required is selected by rotating an integral filter wheel.

Ideal for biochemical colorimetric analysis
Examples of routine assays that can be measured in serum and plasma include Cholesterol, Albumin, Total Protein, Glucose, Hemoglobin, Cretonne, Urea and those in cerebrospinal fluid include Glucose and Total Protein. The instrument has been designed as an “open” system so that test kits for clinical and medical applications from virtually any supplier can be used. The samples can be measured in either standard 10mm path length curettes (a minimum of 400µl is required) or in 10/12/16mm diameter test tubes (adapters are included with the instrument). 

Ideal for tropical and field conditions  Colorimeters  
The unit has been trivialized to protect it in hot and humid conditions (to 45°C and 70%, respectively); the 10 gelatin filters are encased in glass to prevent fungal growths appearing and the PCB has been conformably coated so that individual components are sealed to prevent corrosion. The instrument is powered by an internal rechargeable Nigh battery or by external power allowing it to be used where the power supply could be unreliable. Using the instrument connected to the mains electricity supply automatically recharges the battery.

The K-10 LF solves these frustrations with an accurate and fast colorimeter paired with it's easy to use companion PC program.

A colorimeter is a optical instrument which can measures color that absorbed by an object or substance. It determines color which based on the red, blue, and green components of light absorbed by the object or sample, much as the human eye does. When light passes through a medium, part of the light, and as a result, there is a decrease in how much of the light reflected by the medium. The device works on the basis of Beer-Lambert's law, which states that the absorption of light transmitted through a medium is directly proportional to the concentration of the medium. A colorimeter measures that change so users can analyze the concentration of a particular substance in that medium.

There two types of colorimeters I will to introduce: Lacier 526 Monitor's and K-10.

Firstly, the Lacier 526 Monitor's wide-gamut H-IPS POL panel covers an outstanding 100% of ISO Coated and 97% of Adobe RGB gamut. This industry-leading panel provides 12-bit gamma correction with 16-bit calculation precision, individual monitor uniformity correction, and Color Keeper backlight stabilizer. With its large 25.5’’ diagonal, wide 16:10 format, and high 1920x1200 resolution, it enhances productivity and allows full 1:1 scale display of 2 letter-size pages with extra space for toolbars. The included Lacier blue eye pro software offers a full-featured color management solution including automatic hardware calibration & ICC Profile creation, reference monitor matching, profile switching without recalibrating, calibration Test and Report, manual fine tuning, and ambient light analysis.

Secondly, the Klein K-10 LF is designed to save time, save money, produce accurate calibrations and then report this information to your customers. This equipment is designed to eliminate the frustration that professional calibrators have. One frustration is dealing with expensive spectroradiometers that are slow and laborious. Another frustration has to make do with equipment that doesn't accurately measure color, especially at low light. The K-10 LF solves these frustrations with an accurate and fast colorimeter paired with it's easy to use companion PC program. Every K-10 LF is individually calibrated. Each K-10 LF goes through an established calibration routine to get it accurate and to keep it accurate in the field. One of the calibrations involves thermal compensation which works behind the scenes, when you use it. So you don't have to worry about temperature changes when performing a calibration. This ensures continued superior accuracy at low light. Another calibration includes traceability to NIST. Documentation of this traceability is included with every K-10 LF we sell. The Klein K-10 LF measures all kinds of displays, not just projectors. We include 9 calibration files for various display types to give you the best accuracy in a variety of different applications. Every feature incorporated into the K-10 LF is designed to make your calibrations easier, faster and more accurate.

With the Klein PC Program you can create your own calibration files and set measuring parameters. Then data log, graph and export all in an easy to use interface.

Traditional and LED Lighting Products

Original Article: http://www.lisungroup.com/blog/the-replacement-of-traditional-lighting-with-led-products/

Whether semiconductor lighting technique can cause a new lighting revolution, totally depends on the performance, cost and the application prospects of LED itself. In recent years, high power LED has enhanced the efficiency and declined the cost at a breakneck speed, it has a broad prospect of application in the display, lighting as well as some special fields. But facing the competition of traditional technology, it is not as optimistic as people expected for LED to replace traditional light source in a big range. Especially in ordinary lighting area, there are many technical challenges need to conquer. The light efficiency, heat dissipation, life and reliability, light health problems to solve, price ratio also needs to dramatically increase. Therefore, our country LED industry now faces huge challenges and opportunities.

United States Department of Energy proposed a five-year LED development plan before the year of 2012, which deserves us thinking and learning from. Currently we attached more emphasis to use LED to “instead of” traditional lighting products, and use the traditional lighting standard to measure the performance of LED products. In fact, it is impossible to fully display all the LED characteristics under the present condition. LED is a kind of solid luminescent device of small power and light source, has the good directional light-out characteristics, and is easy for digital integrated process control. Therefore, how to break through the traditional form of light source based on the existing lighting standards to develop LED product, is the problem that faced with. That is, how we give play to the characteristics of LED based on the people’s needs of vision, health, environmental protection, is important problem for the “next generation” semiconductor lighting industry development.

About Lisun Group:

Lead in CFL and LED Tester. Click to our product lists:

Goniophotometer
Spektrofotometer
Integrating Sphere
Colorimeter
Photometer
LED Test Instruments
CFL Test instruments
EMC testing
Electronic Ballast Tester
Equipments for Testing Electronic components
Electrical Safety Tester
Environmental testing equipment
AC and DC power supply
Spectrophotometer

Light Theory: V lamda Function

Original Article: http://www.lisungroup.com/blog/theories-about-light-part4-v-λ-function/

In order to have also a well defined photometer, an “artificial eye” has been constructed to simulate the light sensitivity of the human eye. The relative response of the normal human eye to monochromatic light at the different spectral frequencies was determined experimentally by the CIE and standardized in 1924. This is known as the photopic luminous efficiency function. The symbol of this function is V(λ) and it is usually expressed as a function of the wavelength of light (in air).

The following procedure was conducted to determine the photopic luminous efficiency function: First, light of constant intensity was emitted and its frequency was varied until the lightness perceived by the observer was found to be maximal. This occurred at a frequency of about 540 THz, corresponding to wavelength λm = 555 nm. The wavelength was then set to another λ and the power was readjusted until the lightness was judged to be the same as at λm. V(λ) could thus be computed as the ratio of the radiated power at λm and λ, respectively.

Of course, this experiment has been conducted by many observers and the resulting average was used to define the so called CIE standard eye which is an optical sensor with sensitivity corresponding to the function V(λ).

The photopic luminous efficiency function serves as a link between the subjective response of the human eye and normal physical measurement techniques. It thus provides the basis for a group of photometric units.

X-Rite – proprietary photopic filters consist of several elements designed to match the CIE photopic response curve to achieve an f1 to better than 1.5% at all wavelengths (f1 < 1.5 % defines the highest accuracy class L according to DIN 5032 and CIE No. 69). The sensitivity in the IR and UV range is reduced to a minimum < 0.1%. The careful design of the detectors ensures best-of-class equipment and repeatable measurement results, even for monochromatic radiation sources.

Precision operation amplifiers convert the photocurrent in nA resulting from the light sensation into a proportional voltage. The voltage is converted by a precision AD converter into a signal that is proportional to the expected illuminance (luminance meter) in lux.

Each Lisun’s  e – Optronik’sphotometer is carefully tested and calibrated in our own calibration laboratories with intensity calibration sources traceable to National standard (PTB); e.g., a WI41Gcalibration bulb operated under stable conditions (25°Cambient temperature), electrical values with a color temperature corresponding with CIE standard illuminant A (2856 K).

About Lisun Group:

Lead in CFL and LED Tester. Click to our product lists:

Goniophotometer
Spektrofotometer
Integrating Sphere
Colorimeter
Photometer
LED Test Instruments
CFL Test instruments
EMC testing
Electronic Ballast Tester
Equipments for Testing Electronic components
Electrical Safety Tester
Environmental testing equipment
AC and DC power supply
Spectrophotometer

Measuring Luminous Intensity Distribution With a Goniophotometer

Original Article: http://www.lisungroup.com/blog/how-to-determine-the-right-measuring-distance-when-measuring-the-luminous-intensity-distribution/

The equation [I(γ)=d*d*E(γ)] only applies when the distance d is large enough to view the lamps or luminaries as a point source approximately. EN 130-1:2004 specifies the requirements of measurement distance: The measurement distance shall be at least 5 times the largest luminous dimension of the test source.

However for luminaries with distributions significantly different from a cosine, the above ratio will give rise to errors in excess of 1%. For such luminaries a measurement distance ratio in excess of 10:1 may be needed.

The minimum measuring distance for a floodlight with reflector can be determined by the distance of “beam cross over” point as [D min=a*a*(2a/5+1)/4f+2af/s].

However, the measuring distance can not be too large either, it is firstly limited by the space of the darkroom, and secondly it is limited by the sensitivity of the photometer detector. Generally said, for large luminaries, the measuring distance of 20-30 meters is reasonable.

About Lisun Group:

Lead in CFL and LED Tester. Click to our product lists:

Goniophotometer
Spektrofotometer
Integrating Sphere
Colorimeter
Photometer
LED Test Instruments
CFL Test instruments
EMC testing
Electronic Ballast Tester
Equipments for Testing Electronic components
Electrical Safety Tester
Environmental testing equipment
AC and DC power supply
Spectrophotometer

Lighting Test Rules: High Pressure and High Temperature Experiment

Original Article: http://www.lisungroup.com/blog/high-temperature-test-and-high-pressure-experiment/

A: High Temperature Test

The main testing equipments: the constant temperature chamber, thermometer, pressure regulator, the voltmeter and clock.

The main test projects: high temperature and low voltage starter, high temperature and safety operation.

Number of tests: 10.

Test methods: Put the lamps and lanterns under test in the constant temperature chamber, connect the circuit, raise the output voltage of the voltage regulator to 180 V (pressure regulator for the lamps and lanterns only power the lamps and lanterns under test), open the power supply of the constant temperature chamber, set the temperature at60℃, open the power source of the lamps and lanterns when the temperature rises to60 ℃, observe whether the lamps and lanterns work normally, and then raise the pressure regulator to 250 V and let it work for 24 hours, watch the experiment result. When meeting the abnormal phenomenon of the damage of the lamps and lanterns or the deformation of the heated materials, the experiment is not qualified.

B: High Temperature High Pressure Shock Initiation Test

The main test equipments: the constant temperature chamber, thermometer, pressure regulator, the voltmeter and clock.

The main test projects: high temperature starting performance and reliability

Number of tests: 10.

Testing methods: According to the above experiment, under the condition of high temperature, raise the voltage regulator to 250 V, switch the lamps for three times and each time interval is no less than eight seconds (8 seconds means that all the capacitance of the lamps and lanterns discharge to reduce the mutual interference), and in the process, lamps and lanterns should not be damaged, otherwise they will be considered as not qualified.

About Lisun Group:

Lisun Electronics Inc. issued her 2012 version product catalog. Due to the LED industry developed this years, Lisun designed and produced a series high accuracy and high quality LED tester.

High and Low Temperature & Humidity Chamber (GDJS-*B): Different size can be chosen. It used for LED lamp test in high and low temperature condition to measure the quality.

System of Goniophotometer (LSG-2000 or LSG-1800): This system is according to CIE, LM-79 & LM-80 and other lighting international standards. The customer can use it for measuring light intensity distribution curve, export IES files for DiaLux software to re-design the lighting products. It is widely used in LED indoor and outdoor manufactory and lab design center.

Instruments for EMC Testing (EMC500 and ESD61000-5): The LED products sell to Europea are request CE certificate, the EMC Test Instruments are used to measure whether meet CE request.

Spectrophotometer (spektrofotometer) & Integrating Sphere Test System (LPCE-1): This system is suitable for photometric and colorimetric measurement of luminaries such as Energy-saving lamp, Fluorescent lamp, HID lamp (high voltage sodium lamp and high voltage mercury lamp), CCFL and LED. The measured data meets the requirements of CIE and IES_LM-79 for the measurement of photometry and colorimetry.

AC and DC Power Supply: Different voltage and current Power supply can be chosen. It make sure the measuring lamp get a stably test condition on power supply.

Other important products:
Integrating Sphere
Colorimeter
Photometer
LED Test Instruments
Electronic Ballast Tester
Equipments for Testing Electronic components
Electrical Safety Tester
Environmental testing equipment
Spectrophotometer

Please visit our main website for detailed information ^_^

Growing Markets Requires the LED BLU Standards

Original Article: http://www.lisungroup.com/blog/led-blu-standards/
At IEC TC110 annual meeting of September, 2007, IEC made a formal decision to establish an independent the project team which is directly under the jurisdiction of IEC TC110, especially for the LED back light concerned by the  global industry,. In subsequent years, though the  unceasing expansion and development, it has possessed  many international standard projects such as he testing method, the general standard, points standard, terms and symbol.China is now one of the core members who had participated in the draft work of the international standard IEC TC110 / PT62595.Chinahas three experts who has taken in the draft work of LED back light international standards.
Growing market requires the LED BLU standards, which has been the hot topics in the industry.

Because LCD TV with LED back lighting has better color quality, better dynamic image, longer service life, and can achieve lower power consumption with the dynamic control technology in the area, the market share of LCD TV with LED backlighting expands unceasingly. In recent years LED back light has become one of the main application direction of LED, and also the focus of the industries of mainland China,Taiwan,Hong Kong. According to J.P. Morgan ‘s data, in 2010, LED back light in the application of LCD TV will rapidly grow, the market penetration will increase up to 22% of 2010 from 3% of 2009,  and is expected to reach 56% in 2011.

Because the technology and industry such as the dynamic backlighting, sequential backlighting is still developing, standard has a huge impact on industry, so international standard of LED BLU have been the recent issues among Chinese, Japanese and south Korean industry.

About Lisun Group:
Lisun Electronics Inc. issued her 2012 version product catalog. Due to the LED industry developed this years, Lisun designed and produced a series high accuracy and high quality LED test instruments:
System of Goniophotometer (LSG-2000 or LSG-1800): This system is according to CIE, LM-79 & LM-80 and other lighting international standards. The customer can use it to measure light intensity distribution curve, export IES files for DiaLux software to re-design the lighting products. It is widely used in LED indoor and outdoor manufactory and lab design center.
Spectrophotometer (spektrofotometer) & Integrating Sphere Test System (LPCE-1): This system is suitable for photometric and colorimetric measurement of luminaries such as Energy-saving lamp, Fluorescent lamp, HID lamp (high voltage sodium lamp and high voltage mercury lamp), CCFL and LED. The measured data meets the requirements of CIE and IES_LM-79 for the measurement of photometry and colorimetry.
High and Low Temperature & Humidity Chamber (GDJS-*B): Different size can be chosen. It used for LED lamp test in high and low temperature condition to measure the quality.
Instruments for EMC Testing (EMC500 and ESD61000-5): The LED products sell to Europea are request CE certificate, the EMC Test Instruments are used to measure whether meet CE request.
AC and DC Power Supply: Different voltage and current Power supply can be chosen. It make sure the measuring lamp get a stably test condition on power supply.
Other important products: Integrating Sphere, Colorimeter, Photometer, LED Test Instruments,Spectrophotometer, Electronic Ballast Tester, Equipments for Testing Electronic components, Electrical Safety Tester,Environmental testing equipment.

Environmental protection and power saving

Original Article:http://www.lisungroup.com/blog/power-saving-and-environmental-protection/

To promote green lighting, a lot of electricity can be saved. So, the environmental pollution by the production power can be reduced.

To promote the green lighting and protect the global environment, we need to do the followings.

Using the lighting electric products of high efficiency, long service life, safe and stable performance.

Using the electric light source of high efficiency and energy saving.

Using high energy saving lighting lamps and lanterns

Using high efficiency and energy saving lamp appliances accessories

Using wiring equipment of high efficient transfer, long service life, low and safe electric power.

Using various kinds of the control equipments or devices for illumination energy saving.

Using electric light source of high efficiency and energy saving.
Using brine tungsten lamp to replace common lighting incandescent lamp (electricity saving 50-60%)

Using single ended fluorescent to replace incandescent lamp (electricity saving 70-80%)

Using tube fluorescent to replace incandescent light bulb and the upgraded tube fluorescent lamps (electricity saving 70-90%)

Strongly promoting the applications of high-pressure sodium lamp and metal halide lamp, low voltage sodium lamp.

Promoting the LED-LED application

Using high energy saving lighting lamps and lanterns

Choosing lamps and lanterns of high efficiency, reasonable durability and good reflection

Using lamp appliances accessories of high efficiency and energy saving.

Using energy-saving ballast and electronic ballast instead of traditional high energy- consuming inductance ballast.

The energy of power generation mainly are the fire (coal, oil and gas), hydraulic and atomic energy. For coal-fired power plant inChina, mainly two-thirds are coal.

Power saving is very important to protect the environment. In the case of thermal power generation, each production of 1 KWH, the air pollutants are burning coal, burning oil, burning gas.CO2 continuously accumulates, absorbs the infrared radiation released by the ground in the atmosphere, forming the greenhouse effect, leading to the earth warming, sea ice melting, and thermal expansion, sea levels rising, change the ecological system, influence the human life and production activities.

SO2, NOx and acid rain in the atmosphere make the materials corrode rapidly, destroying the soil and water quality, and effect the plants grow. The human who lives for a long time in certain concentration of SO2 and NOx in the air, can produce respiratory tract and other diseases.

About Lisun Group:

Lead in CFL and LED Test. Main products are Spectrophotometer, Goniophotometer, Integrating Sphere, EMC Testing, AC and DC Power Supply, Photometer, Colorimeter, Electrical safety testing, etc.

spectrophotometer system

A spectrophotometer can be used to provide the concentrations of the Co²⁺ and Ni²⁺ in the waste solution.

When doing analyses with a spectrophotometer, you should accept the following procedure. You should work in groups of three, having each member of the team responsible for collecting information for one of the solutions.

When using the spectrophotometer, you should know the following information. Be careful not to get the on your skin because the ions you will use are toxic. Wash the area with large amounts of water if you get some on your skin. If you should spill any, please ask your instructor to clean up the mess.

One potential method for the determination of their concentrations involves use of a spectrophotometer because each of these ions produces a colored solution. A visible light in a predictable and measurable amount that allows one to determine the concentration of the colored substance in the solution is absorbed by a colored substance. The colored components may interact in such a way that the light-absorbing property of the mixture is not a simple sum of the properties of the individual components if several colored substances is contained by a solution. However, there is little or no interfering interaction and a quantitative measure of the concentrations of the individual components can be mad for some mixtures when using the spectrophotometer.

We usually use a spectrophotometer to make absorbance measurements. Only the desired wavelength, or a very narrow range of wavelengths, can pass through a monochromator into which the lights pass. The light energy is converted to an electrical current that is registered on a meter. It will be essential that solutions are made carefully and the directions for making the measurements are followed precisely, for the reason that he instruments we will use are capable of quite precise measurements. Directions for using the spectrophotometers are included if you need to be sure that you use the same instrument for all of your work.

More information about spectrophotomewter, you can refer to www.lisungroup.com