FTN02
Field thermal needle system for thermal resistivity/conductivity measurement
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- field measurements
- NSSP technique
- local calibration/conformity assessment
Field thermal needle system for thermal conductivity/resistivity measurement
FTN02 Field thermal needle system performs accurate on-site (field) measurements of the thermal resistivity and thermal conductivity of soils. Measurements with FTN02 comply with ASTM D5334 and IEEE 442 standards. The system is specifically designed for surveys that require measurements from the surface down to a depth of 1.5 m. Due to the long and thin lance to which the sensor is mounted, the insertion of the thermal needle into the soil requires just a small-diameter access hole, typically made using a ground drill. Using a lance rather than digging trenches saves time. FTN02 is operated and powered from the hand-held control and readout unit CRU02.
- field measurements
- NSSP technique
- local calibration/conformity assessment
Specifications
| measurement method | absolute measurement per ASTM D5334-14 and IEEE Standard 442-1981(03) |
| measurement range | 0.1 to 6 W/(m·K) (all common soils) |
| uncertainty (at 20 °C) | +/- (6 % of reading + 0.04) W/(m•K) |
| measurand | thermal conductivity, thermal resistivity |
| rated operating temperature range | 0 to +50 °C |
| data analysis | initial analysis by CRU, final review of measurement on PC (required by ASTM) |
| heating interval | 300 s (typical) |
| data storage capacity | 50 measurements |
すべての仕様
| measurand | thermal conductivity, thermal resistivity |
| measurement range | 0.1 to 6 W/(m·K) (all common soils) |
| rated operating temperature range | 0 to +50 °C |
| measurement method | absolute measurement per ASTM D5334-14 and IEEE Standard 442-1981(03) |
| data analysis | initial analysis by CRU, final review of measurement on PC (required by ASTM) |
| uncertainty (at 20 °C) | +/- (6 % of reading + 0.04) W/(m•K) |
| heating interval | 300 s (typical) |
| data storage capacity | 50 measurements |
| length LN02 lance | 1.4 m |
| length TP09 needle | 0.17 m |
| diameter TP09 | 6.3 x 10⁻³ m |
| data communication | USB |
Thermal needle measuring system
FTN02 is a thermal needle measuring system for on-site measurements of thermal conductivity (or the inverse value, resistivity) at depths from the surface down to a depth of 1.5 meter. Due to its robustness and length, FTN02 is the best solution for route-surveying of high-voltage electric power cables and heated pipelines (typical depth of burial of 1.5 m). The measurement method is based on the use of a “thermal needle”, also called Non-Steady-State Probe (NSSP) technique.
This method employs a heating wire and a temperature sensor in a needle. The FTN02 system consists of the thermal needle, model TP09, mounted on a long lance, LN02, and a control and read-out unit CRU02. FTN02 is easy to use. After making a small-diameter access hole, the thermal needle TP09 is brought down to just above the point that must be investigated and then pushed into the local undisturbed soil below. The user performs control and read-out of the measurement from the handheld CRU02. The measurement result is generated immediately by the CRU02 from the analysis of the time series of the temperature and the heating power during the heating interval.
FTN02 design and benefits
Suitable for on-site (field) surveys: FTN02 is sufficiently robust to survive rough handling during a typical survey. It performs measurements as a stand-alone unit. The batteries in the CRU02 can be recharged through the cigarette-lighter receptacle in an automobile, using the CA02 car adapter, or from 220/110 VAC using the WSA02 wall socket adapter.
Saving time: With FTN02 there is no need for digging a large-diameter access hole to perform measurements. Because of the lance LN02, drilling a small access hole made with a ground drill, typically 30 mm in diameter, is sufficient. With measurement systems without a lance, such as MTN02, the user has to make a large-diameter access hole or even to dig a trench.
A typical measurement requires around 60 s to get to thermal equilibrium plus 300 s for the actual heating interval.
Easy data processing: CRU02 gives an immediate indication of the end result and an indication of the quality of the measurement. It can store 50 measurements. ASTM and IEEE require that the end result is visually checked and recalculated. This is typically done during later analysis of the measured data in a spreadsheet. CRU02 is connected to a PC by using USB.
Local calibration/conformity assessment: The accuracy of the measuring system can be verified (before a survey) by measurement in glycerol. For high accuracy verification against a reference material with formal traceability, CRC05 calibration reference cylinders can be separately purchased.
Frequently Asked Questions
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熱特性を測定するために、どのように適切な機器を選べばよいですか？
Hukx は、材料特性評価および熱伝導率測定のための幅広い製品を提供しています。
最適な測定機器の選定についてもサポートしていますが、その前に、まず次の点をご確認ください。
- どの材料を分析する必要があるか
- 温度や圧力など、どのような条件で測定するのか
- 利用可能な試料はどのようなものか
- アプリケーションに関連する規格があるか
- 必要とする精度のレベルはどの程度か
Hukx は、熱伝導率測定システムおよびセンサーのリーディングメーカーです。 土壌、プラスチック、塗料、複合材、ペースト、流体など、さまざまな材料の熱特性測定に適した機器を選ぶためのガイドをご用意しています。ガイド、ノート、ホワイトペーパーなど、オンラインで提供している資料の中から「熱伝導率選定ガイド」をご覧いただけます。
Hukx は、最高品質の製品を適正な価格で提供しています。 もし当社で最適なソリューションをご提供できない場合は、適切な提供者をご紹介いたします。 どうぞお気軽にお問い合わせください。
熱伝導率を測定するためのセンサー（ニードル、プローブ、メーター）はどこにありますか？
Hukx では、センサーおよび計測制御ユニット（MCU）を含む、さまざまな完全測定システムを販売しています。 フィールドでの使用やラボ環境での使用に適したシステムや、ニードル型の熱特性センサーも提供しています。これらの熱特性センサー（TP02、TP08）は、ユーザー自身の電子機器（例：Campbell Scientific CR1000）と組み合わせて使用できる単体プローブとしてもご購入いただけます。これらのセンサーはこちらからご覧いただけます。 また、非侵襲型測定システム STPSYS05 に含まれるセンサーは、センサー単体（STP05）としても購入可能です。お探しの製品が見つからない場合は、どうぞお気軽にお問い合わせください。
希望する熱伝導率測定装置について、トレーニングやレンタルシステムを利用することはできますか？
システムオペレーター向けの専門トレーニング
一般的には、マニュアルや規格に従うことでシステムを操作できますが、当社では専門的なトレーニングを提供することも可能です。トレーニングを受けることで、第三者へのサービス品質が大幅に向上し、機器の操作効率が高まり、最終結果の不確かさを低減できます。
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