The present set-up is designed to measure the emissivity of the test plate. It consists of a test plate and black plate comprises of a mica heater sandwiched between two circular plates. As all the physical properties, dimension and temperature are equal hence heat losses from both plates will be same except radiation loss and the input difference will be due to difference in emissivity. Both plates are supported on individual brackets in a enclosure with one side transparent to ensure steady atmospheric conditions. Temperature Sensors are provided to measure the temperature of each plate and surrounding. A Digital Temperature Controller is provided to have an automatic smooth control on required heat input to the heater as per user requirements. Further steady state of experiment is achieved in very less time as compared to manual control. Electronic energy meter is provided to measure the heat input.

•Cabinet to accommodate the slab assembly with front window of acrylic.

•An ENGLISH instruction manual consisting of experimental procedures, block diagram etc. will be provided along with the Apparatus.

•The whole set-up is well designed and arranged on a rigid structure painted with industrial PU Paint.

Experimentation/Learning Objectives

•Determination of the Emissivity of a test plate.

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

Utilities Required

•Electricity Supply: 1 Phase, 220 V AC, 50 Hz, 5-15 amp combined socket with earth connection (Earth voltage should be less than 5 volts)

•Table for set-up support.