열전도도측정기 (열유속법)

QUICKLINE™-10

특징

본 제품은 정상상태(steady state)에서 열평형에 도달한 시편의 열저항을 측정하는 열전도도측정기로써 고체 및 액체, 분말, 고분자 멜트, 박막에 이르기 까지 매우 다양한 시료의 열전도도를 매우 재현성 있게 측정하는 Guarded Heat Flow meter 입니다.

온도범위 / 측정범위

Near ambient temperature
0.1 to 20 W/mK [Thermal conductivity range]

▣ 경제적이며 사용법이 간단하다.
▣ 상온 측정용.
▣ Guarded Heat Flow Meter 법.
▣ Manual or computerized operation
▣ 1 inch to 2 inch dia. sample
▣ ASTM E1530
▣ 열전도도범위: 0.1 to 20 W/mK

QUICKLINE™-10은 single temperature 측정기기로써 고체물질의 열전도도를 빠르게 측정하는 데 사용되는 저렴한 열전도도측정기이다. 작동이 간편하고 크기가 작은 시료에 용이하며 cycle time이 짧기 때문에, QuickLine™-10은 품질관리와 재료 검사(screening)에 매우 이상적이다.

특히 금속과 세라믹, 고분자, 복합재료, 유리, 고무 측정 시 매우 정확하다. 종이 제품과 플라스틱 필름과 같이 두께가 얇은 시료 또한 측정이 가능하다.
매뉴얼 또는 컴퓨터 작업에 의한 모델이 가능하다.

QUICKLINE™-10 TEST METHOD

압축하중 (compressive load) 하에서 두 개의 광택 처리된 금속표면 사이에 시편을 놓는다. 온도조절은 상위면에서 조절된다. 하위면은 보정된 열유속 변환기 (heat flux transducer)의 한 부분으로 액체냉각 heat sink에 연결되어 있다.

• 경제적이고 사용이 간편하다.
• 상온 작동
• Guarded Heat Flow Meter Method
• 수동 혹은 컴퓨터 작업 운용
• 1 to 2 inch의 시료 직경
• ASTM E1530 등재
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QUICKLINE™-10
This low cost, single temperature test instrument is used for quick determination of thermal conductivity of solid materials. Because of its simple operation, small sample size, and short cycle time, the QuickLine™-10 is ideally suited for quality control and screening of materials. Metals, ceramics, polymers, composites, glass, and rubber can be tested accurately. Thin samples like paper products and plastic films can also be tested. A manual and a computerized model is available.

QUICKLINE™-10 TEST METHOD
A test sample is held under a compressive load between two polished metal surfaces. The upper surface is temperature controlled. The lower surface is part of a calibrated heat flux transducer, which is attached to a liquid cooled heat sink. An axial temperature gradient is established through the stack as heat flows from the upper surface through the test sample to the heat sink.

After reaching thermal equilibrium, the temperature difference across the sample is measured along with the output from the heat flux transducer. These values and the sample thickness are then used to calculate thermal conductivity. The temperature drop through the sample is determined from temperature sensors in the metal surfaces on either side of the sample. The QuickLine™-10 is factory calibrated using samples of known thermal resistance spanning the range of the instrument. Calibration reference sets are available. The contact resistance is kept small by applying a reproducible, pneumatic load to the test stack.

• Economical and easy to use
• Ambient temperature operation
• Guarded Heat Flow Meter Method
• Manual or computerized operation
• 1 to 2 inch dia. sample
• ASTM E1530

The QuickLine™-10 test method is in accordance with specification ASTM E1530 for measuring thermal conductivity. The manual unit is supplied with a utility software program for convenient data analysis using a PC. The user simply enters data from the QuickLine™-10 digital display via the computer keyboard and the thermal conductivity is automatically computed. If the measured thermal resistance value falls outside the range of the instrument, the program suggests testing a different sample thickness for obtaining more accurate test results. If a PC is not available, data analysis can also be carried out manually following instructions from the user's manual. The new internally computerized QuickLine™-10(C) has the best of both worlds, the rapid testing of a manual device and the ease of operation of a fully computerized system, without the need for an external PC. Once a sample is loaded and a few keystrokes are performed, the thermal conductivity value is automatically measured and displayed in a predetermined length of time. The QuickLine™-10(C) has been programmed with several reference materials covering an approximate thermal conductivity range of 0.1-20 W/mK. Some additional references may be added for user-specific materials. Sample thickness ranges of approximately 1.25" are programmed into the on-board computer based on the customer's typical sample size. Three test duration times (30, 45, or 60 minutes) are available. Once the QuickLine™-10(C) has been properly installed and all heaters and electronics have been turned on, the first step is to calibrate the unit. This is only necessary when the instrument is shut off and turned back on, when a different test duration time is wanted, or when a material with a vastly different conductivity than the calibrated range is to be tested. By selecting the references that have a conductivity value closest to the material to be tested, adjusting the reference thickness to the proper value and selecting the test duration time, the system will automatically calibrate itself.

Loading an actual sample and adjusting to the sample thickness is all that is necessary to perform an actual test at this point with no additional interaction with the operator necessary until the test is complete. At the end of the test duration time, the calculated thermal conductivity and sample mean temperature will be displayed and will remain on the display until the next test is started.

Ease of use, versatility, reproducibility and accuracy are all traits of the new internally computerized QuickLine™-10 (C), making it particularly ideal for those who perform continuous and repetitive tests on batches of the same material.

The instrument is completely self contained and requires no additional instrumentation for the measurement. When city water is used for cooling, the mean sample temperature may vary slightly as the water temperature changes with the seasons. If this variation is undesirable, an optional chiller providing coolant at a fixed temperature can be connected to the unit instead. The QuickLine™-10 is a simple, fast, accurate, and reasonably priced laboratory instrument.

For thermal conductivity testing over a wide temperature range, contact YEONJIN Corp. and inquire about Unitherm™ 2022 Guarded Heat Flow Meter, and Flashline™systems.