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º» Á¦Ç°Àº Hot wire methodÀÇ ÇÑ ÇüÅÂ·Î½á ½ÃÆí¿¡ »ðÀÔµÈ probe (hypodermic needle) ¶Ç´Â ÆíÆòÇÑ ½ÃÆí¿¡ Á¢Ã˽ÃŰ´Â surface probeÀÇ ¹ÝÀÀÀ¸·Î ºÎÅÍ ¿Àüµµµµ¸¦ ÃøÁ¤ÇÏ´Â Probe Method ·Î½á, ºÐ¸»À̳ª ¹Ý°íü ½Ã·á(semirigid form) Áß ¿Àüµµ¼ºÀÌ ³·Àº ¹°Áú¿¡ ¸Å¿ì Æí¸®ÇÏ°Ô ¾²ÀÏ ¼ö ÀÖÀ¸¸ç ¼º´É´ëºñ °æÁ¦ÀûÀÎ ±â±âÀÔ´Ï´Ù.
¿Âµµ¹üÀ§ / ÃøÁ¤¹üÀ§
-15¡ÆC ~ 50¡ÆC ... Operational temperature
0.015 - 6.0 W/mK (depending on probes) ... ¿Àüµµµµ ÃøÁ¤¹üÀ§
¢Ã ¿Àüµµµµ(¥ë), ¿È®»êÀ²(¥á), ºñ¿(volume heat capacity, Cp), ¿Âµµ (T) ÃøÁ¤
¢Ã ÇöÀå »ç¿ëÀÌ °¡´ÉÇÑ Àú°¡ÀÇ portable °â desktop ¿¹°¼ºÃøÁ¤±â
¢Ã ÃøÁ¤½Ã°£ÀÌ ºü¸£´Ù.
¢Ã ´Ù¾çÇÑ Surface probe ¹× Needle probe
¢Ã Ideal for plastics, foams, and geological use
¢Ã Volume heat capacity: 4.0 x 10 4 - 4.0 x 10 6 J/m 3 K Relatively recent modification of a long-established Hot Wire Method is the ¡°probe¡° method. This configuration is particularly practical where the specimen conductivity is determined from the response of a ¡°hypodermic needle¡± probe inserted in the test specimen. Thus the method is conveniently applied to low-conductivity materials in powder or other semirigid form. A probe device can be used to measure the thermal properties of soils in situ, but most commonly a closely controlled furnace is used to contain the sample and produce the base temperatures for the tests. The probe contains a heater and a thermocouple attached to it. When a certain amount of current is passed through the heater for a short period of time, the temperature history of the heater's surface will take on a characteristic form. In the initial phase, the temperature will rapidly rise, and as the heat begins to soak in, the rate of rise becomes constant. When the thermal front reaches the outer boundary of the sample, the rise will slow down or stop altogether due to losses into the environment. From the straight portion of the rate curve (temperature vs. time) the thermal conductivity can be calculated. *1)

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º» Á¦Ç°Àº Àç·áÀÇ ¿Àüµµµµ(thermal conductivity, ¥ë ), ¿È®»êÀ² (thermal diffusivity, ¥á ), ¿Âµµ, üÀûºñ¿ (volume heat capacity, Cp)À» »ó¿Â¿¡¼ ½Å¼ÓÇÏ°Ô ÃøÁ¤ÇÏ´Â Æ÷ÅÍºí °â µ¥½ºÅ©Å¾ °â¿ë ¿¹°¼ºÃøÁ¤±â·Î½á ´Ù°ø¼º Àç·á, ¼¶À¯Áú, ¿¬ÇÑ Àç·áÀÇ ÃøÁ¤À» À§ÇÑ needle probe¿Í ´Ü´ÜÇÑ Àç·áÀÇ ÃøÁ¤¿ë surface probe¸¦ ¼±ÅÃÀûÀ¸·Î ÀåÂø »ç¿ëÇÏ´Â ±â±âÀÌ´Ù.
QUICKLINE¢â-30 ÀÌ¿ë ½Ã dynamic method¸¦ Ê¥Çϱ⠶§¹®¿¡ ¿ÀüµµµµÃøÁ¤ ½Ã°£À» 10ºÐ ~ 16ºÐ±îÁö ÁÙ¿© ÁØ´Ù. ¸Þ´º°ü¸®°¡ 4-line alphanumeric display»ó¿¡ Ç¥½ÃµÇ¹Ç·Î ±â±âÀÇ interactive comminication°ú Ç¥Áع°Áú¿¡ ÀÇÇÑ ÃøÁ¤ probeÀÇ º¸Á¤ÀÌ È¿À²ÀûÀÌ´Ù.
Calibration data°¡ internal memory¿¡ ±â¾ïµÇ¾î Àֱ⠶§¹®¿¡ probe¸¦ ±³Ã¼ÇÏ¿©µµ ÃøÁ¤ÀÇ Á¤È®¼º¿¡´Â ¾Æ¹«·± ¿µÇâÀ» ÁÖÁö ¾Ê´Â´Ù. ÃøÁ¤ µ¥ÀÌÅÍ´Â internal memory¿¡ ÀúÀåµÇ¸ç ¸Þ¸ð¸®¿¡ ÀúÀåµÈ ³»¿ëÀº display³ª RS 232 serial interface·Î PC¿¡ Àü¼ÛÇØ¼ ÀÐÀ» ¼ö ÀÖ´Ù.
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DESCRIPTION
• Àú·ÅÇÑ ÃøÁ¤±âÀ̸ç,
• ÃøÁ¤¼Óµµ°¡ ºü¸£´Ù.
• ÇöÀå¿¡¼ »ç¿ëÀÌ °¡´ÉÇÑ Æ÷Åͺí Çü
• ´Ù¾çÇÑ ÇüÅÂÀÇ probe (surface or needle probes) ¼±ÅÃ ÃøÁ¤
• ÇÃ¶ó½ºÆ½°ú ¹ßÆ÷ü, ÁöÁúÀÇ ¿ÀüµµµµÃøÁ¤¿¡ ¿ëÀÌÇÏ´Ù.
• ASTM D5930, D5334 µîÀç
Measured Quantities
¥ë - Thermal Conductivity, W/mK
¥á - Thermal Diffusivity, m©÷/s
Cp - Volume Heat Capacity, J/m©øK
T - Temperature, ¡ÆC
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Åä¸ñ°øÇÐ
• °ÇÃàÀç·áÀÇ ¿¹°¼º ºÐ¼®
• ´Ü¿Àç °³¹ßÀÇ ÃÖÀûÈ
• °Ç¹°À̳ª ÆÄÀÌÇÁ¶óÀÎ µîÀÇ ´Ü¿ °Ë»ç
ÁöÁúÇÐÀû ÃøÁ¤
• Åä¾çÀ̳ª ¸ð·¡, ¹ÙÀ§ÀÇ ¿¹°¼º ºÐ¼®
• Åä¾çÀÇ ±ÕÁú¼º °Ë»ç
ÈÇÐ »ê¾÷
• ÈÇй°Áú ¹× ÈÇÐ÷°¡Á¦, À±È°À¯, ÇÃ¶ó½ºÆ½, Çöʹ°Áú, °í¹«, ¹ßÆ÷ü µîÀÇ ¿¹°¼º ºÐ¼®
¸ñÀç »ê¾÷
• ¸ñÀçÀÇ ¿¹°¼º ºÐ¼®
• ¼öºÐ ÃøÁ¤ ¹× °ÇÁ¶ °øÁ¤ ÃÖÀûÈ
¼¶À¯ »ê¾÷
• ¼¶À¯ÀÇ ¿Á¢ÃË ¾ÈÁ¤¼º ÃÖÀûÈ
• ¼¶À¯ÀÇ ÇÕ¼º ¹× surface adjustment
• ¹Ù´Ú ŸÀÏ ¹× Ä«ÆäÆ® Æò°¡
- Broad Lambda range specification
- Hard rocks, liquids, suspensions, soft foam µî
±â°èÀû Ư¼ºÀÌ ´Ù¸¥ ´Ù¾çÇÑ Àç·á ÃøÁ¤
- »ç¿ëÀÚ°¡ ¿øÇÏ´Â »ç¾çÀÇ probe ÇÑ °³°¡ ±âº»À¸·Î °ø±ÞµÈ´Ù.
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