GHP 500

GHP 500

Guarded Hot Plate – The Absolute Method for Testing Insulation Materials

Measuring devices of the GHP 500 series are robust cabinet devices which are especially suited for testing thicker specimens. Thanks to the integrated single board computer (SBC) with Windows operating system, the Lambda software and the high-resolution color touch display, the devices are very user-friendly.

Numerous interfaces such as RS232, USB and Gigabit Ethernet enable connectivity to peripheral devices and allow for fast and convenient data transfer. Connection to an external PC allows for the extensive evaluation of test results and the printing of test reports.

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.

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) – depending on material and thickness
    Fully insulated guarded test chamber, designed for specimens with a thickness up to 200 mm
    Available as 1- or 2-specimen measurement method according to ISO 8302 (chapter 1.6.2)
    Easy specimen change from the front ∙ Integrated digital measurement of specimen thickness and sample pressure
    Motorized lifting of the upper plate
    Operator guidance via touch display with intuitive guidance through software
    Network capability
    Control, data acquisition and data processing via external PC and Lambda software (optional)
    Variable dimensions of heating plates; heating area from 100 mm x 100 mm up to 300 mm x 300 mm
    Square-shaped or rectangular measuring areas
    Cold plates and guarded chamber are controlled by chiller systems