TCT 716 Lambda
TCT 716 Lambda – Between Classical Heat Flow Meters and Laser Flash Analyzers The TCT 716 Lambda offers the capability of analyzing specimens with optimum dimensions: smaller than conventional HFM and larger than LFA. This enables investigations on homogeneous and inhomogeneous materials with Thermal ConductivityThermal conductivity (λ with the unit W/(m•K)) describes the transport of energy – in the form of heat – through a body of mass as the result of a temperature gradient (see fig. 1). According to the second law of thermodynamics, heat always flows in the direction of the lower temperature.thermal conductivity values ranging from low to medium, for example polymers, composites, glass, ceramics, some metals, etc. The robust design of the TCT 716 Lambda Thermal ConductivityThermal conductivity (λ with the unit W/(m•K)) describes the transport of energy – in the form of heat – through a body of mass as the result of a temperature gradient (see fig. 1). According to the second law of thermodynamics, heat always flows in the direction of the lower temperature.thermal conductivity tester offers easy, uncomplicated handling of the software and hardware. The guarded heat flow meter (GHFM) is fully software-controlled, including mean temperature and applied force. The software also allows for an unlimited number of steps in test cycles for best performance This GHFM has a left and right test stack; which enables tests on a single specimen or simultaneous tests on two specimens. Each stack is independent of the other in terms of clamping force and specimen thickness. Both stacks can be operated across the entire temperature range from -10°C to 300°C. This arrangement not only increases sample throughput, but also allows for more data to be collected in less time. The system provides precise temperature control with a resolution of 0.1°C. It is equipped with multiple high-resolution detectors (RTD), which allow for accurate measurement of the thermal gradient across stack and specimen thickness.
| TCT 716 Lambda | |
|---|---|
| General | |
| Standards | Based on ASTM E1530 |
| Operation | External PC, minimum i5 or equivalent, 500 GB, 2x USB 3.0 (not included) |
| Automated instrument calibration | Yes; reference materials: fused silica; pyroceram and stainless steel |
| Testing chamber | Motorized door opening/closing mechanism, interlocked |
| Measurement data | |
| Thermal resistance range | 0.001 … 0.030 m2·K/W |
| Thermal conductivity range | 0.1 … approx. 45 W/(m·K) (using proper sample thicknesses) |
| Thermal conductivity accuracy | ±3% deviation from literature value (depending on the accuracy of calibration material) |
| Thermal conductivity repeatability | ±2% (precision; measurement of the same sample in the same device after sample out/in between measurements |
| Measurement times for different material types | In general, t < 2 hours/point, depending on range, number of temperature steps and conductivity |
| Number of set points | Free-selectable number of programmable test temperatures; typically full range test includes 5 to 6 test temperatures max. |
| Number and type of temperature sensors | Premium RTD class A, in protective capsule, 14 total/instrument, resolution: 0.01°C |
| Metering area of the plates | 51 mm, round, full cross section |
| Sample Dimensions | |
| Sample shapes | Round |
| Sample dimensions | ø 51 mm nominal (2 in; +0.005 in, -0.050 in); height up to 31.8 mm (1¼ in) |
| Sample condition | Solid |
| Number of samples | Up to 2; independent of type, identical thermal cycles |
| Contact force and load control | |
| Variable contact force | Programmable for incompressible materials |
| Contact pressure/accuracy | 5 … 50 psi ± 5 psi |
| Load control | Automatic |
| Temperature | |
| Temperature |
|
| Temperature gradient | Typically 30 K, variable |
| Cooling system | Liquid CO2 |
| RTD resolution | ±0.05%, class A RTD, approx. ±0.01°C resolution |
| Locations of temperature measurement | Specific locations along stack, consisting of upper plate/sample/lower plate, heat sink |
| Instrument Dimensions | |
| Dimensions and weight | 460 mm (18”) wide, 630 mm (25”) deep, 510 mm (20”) high, 80 lbs (without CO2 cylinder) |
| CO2 cylinder | mandatory for operation (not included) |
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