Description

This Emissivity Measurement Apparatus is precisely manufactured under the supervision of expert professionals using best quality raw material. Appreciated for easy installation, simple functionality and hassle-free operation, this apparatus is hugely demanded by the clients.

Technical Description:

• • • The present Set-up is designed to measure the emissivity of test plate. The test plate comprises of a mica heater sandwiched between two circular plates.
    • Black plate is identical with test plate, but its surface is blackened.
    • As all the physical properties, dimension and temperature are equal heat losses from both plates will be same except radiation loss.
    • Hence the input difference will be due to difference in emissivity.
    • Both plates are supported on individual brackets in a enclosure with one side glass to ensure steady atmospheric conditions.
    • Temperature Sensors are provided to measure the temperature of each plate and surrounding.
    • Electric Supply is given to heaters through separate variacs so that temperatures of both can be kept equal and is me asured with Digital Voltmeter and Digital Ammeter.

Learning Objectives/Experiments:

• • • Determination of the Emissivity of a test plate.
    • Study the variation of emissivity of test plate with absolute temperature.

Technical Specifications:

• • • Test plate Diameter: 160 mm (approx.)
    • Black Plate Dia: 160 mm (Approx.)
    • Heater (2Nos.): Nichrome Wire Heater. (One each for test plate black plate)
    • Cabinet to accommodate the slab assembly with front window of glass/acrylic
    • The whole set-up is ingeniously designed and schematically arranged on a powder-coated rigid structure.

Control Panel:

• • • Digital Voltmeter: 0-300 Volt
    • Digital Ammeter: 0-2 Amps
    • DPDT Selector switches: For Digital Voltmeter Digital Ammeter
    • Variacs; 0- 230 V, 2 Amp, (2 Nos.)(One each for test plate and black plate)
    • Digital Temp. Indicator: 0-300°C, with multi-channel Switch
    • Temperature Sensors: RTD PT-100 type
    • Standard make On/Off switch, Mains Indicator etc.

Scope of Delivery:

• • • 1 Self Contained “Emissivity Measurement Apparatus”
    • 1 Instruction Manual consisting of experimental procedures, block diagram etc