GHP 900 S
Guarded Hot Plate with a Tiltable Test Chamber
Highlights
Guarded Hot Plate - The Absolute Method for Testing Insulation Materials
Measuring devices of the GHP 900 S series are cabinet devices with a tiltable test chamber that are well suited for a wide range of applications, those involving especially thicker specimens and insulating glass. The design of the device is such that specimens are inserted into the test chamber from the top. This allows for the insertion of heavy and complex samples without damaging the measuring plates. Data logging and control of the device are handled by the external Lambda Control desktop device alongside a PC with Windows operating system and Lambda software.
Cabinet devices with a tiltable test chamber are especially well suited for determining the 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 and U-value of windows and skylights. The U-value of an insulation glass window depends on the mounting angle (vertical, horizontal or in between) due to different heat transfer conditions within the gas phase. The GHP 900 S is able to measure the 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 of such insulation glass windows as a function of temperature and mounting angle.
Method
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 - A Key Parameter for Improved Energy Efficiency
Guarded Hot Plate - Principle of Operation
The hot plate and the guard ring are sandwiched between two samples of the same material and approximately the same thickness, d. Cold plates are placed above and below the samples. All plate temperatures are controlled such that a well‐ defined, user‐selectable temperature difference, ΔT, is established between the hot and the cold plates – and thus across the sample thickness. The guard ring is maintained exactly at hot plate temperature in order to minimize lateral heat losses.
NETZSCH offers more exciting products that support you in measuring Thermal Conductivity:
Specifications
All features at a glance
- Large 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 measuring range up to 2.0 W/(m·K)
- Fully insulated guarded test chamber, designed for specimens with a thickness up to 380 mm
- Available as 1- or 2-speciment measurement method according to ISO 8302 (chapter 1.6.2)
- Easy specimen change from the top
- Fixation of specimens onto the measurement positioning surface
- Electrically operated tilting mechanism for the test chamber
- Tiltable – especially important for skylights
- Tilting angle indicator (0 to 90°) on LCD display
- Control, data acquisition and data processing via external PC and Lambda software
- Variable dimensions of heating plates – especially for bricks with different dimensions; heating area from 200 mm x 200 mm up to 500 mm x 500 mm
- Square-shaped or rectangular measuring areas
- Cold plates and guarded chamber are controlled by chiller systems
| GHP 900 S | |
|---|---|
| Measuring range | 0.005 to 2.0 W/(m·K), depending on material and thickness |
| Specimen size (L x W) | 900 mm x 900 mm variable, according to the dimension of the hot plate: 200 mm x 200 mm up to 500 mm x 500 mm optional: 800 mm x 800 mm for insulating glass |
| Specimen thickness (H) |
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| Temperature range |
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| Interface | 1x RS 232,1x Gigabit Ethernet |
| Dimensions (H x W x D) | 235 cm x 130 cm x 120 cm |
| Power supply | 110 V to 230 V, 50/60 Hz |
| Weight | 256 kg |
Accessories
Accessories and options for expanding upon the functions of the devices are available. The operator can adapt the different measuring tasks as needed with regard to determining the thermal conductivity using heat flow meters, guarded hot plates and guarded hot pipes. Auxiliary equipment is required for certain measurements, especially those involving materials such as insulating glass or other insulating materials, natural stone, concrete, plastics, composite materials or loose materials like granulates or flakes. In addition, suitable reference materials should be used for routinely checking and validating the devices.
Proven Excellence in Service
At NETZSCH Analyzing & Testing, we offer a comprehensive range of services globally to ensure the optimal performance and longevity of your thermoanalytical equipment. With a track record of proven excellence, our services are designed to maximize the effectiveness of your devices, extend their lifespan, and minimize downtime.
Unlock the full potential of your equipment with our tailored solutions, backed by years of industry expertise and innovation.
Software
Lambda Software - Universal Software Program for Control, Data Acquisition and Evaluation in the Use of 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 Measuring Devices
Supported Measuring Methods
- Method with heat flow meter in accordance with ISO 8301, ASTM C518, DIN EN 1946-3, EN 12664, EN 12667 and EN 12939
- One- or two-specimen measurement method with guarded hot plate in accordance with ISO 8302, ASTM C177, DIN EN 1946-2, EN 12664, EN 12667, EN 12939, EN 674 and ISO 10291
- Thermal conductivity measuring device with guarded hot pipe in accordanc with DIN EN ISO 8497, DIN EN 1946-5, DIN 52613, ASTM C 534 and ASTM C 335
Functions
- Choice of manual or automatic measuring procedure with up to 16 definable mean temperatures per measurement
- Creation of favorites for fast access to frequently used measurement tasks
- Display of all relevant data, measuring results, intermediate and final results as graphs and tables
- Monitoring of relevant messages and information ∙ Safety function via error messages
- Calculation of nominal λ value from ascertained λ90/90
- Customized test report
- Intuitive icons for menu functions ∙ User and administrator level
Related Devices
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