Drum roster Trial NO : 1 conduct on peanut (groundnut)

fig .Peanut

Speification :

  1. Peanut weight: 2100 gm
  2. rpm of the roster: 7
  3. frontal projected area: 106.3 cm square
  4. drive motor rpm: 1440
  5. reduction gearbox: 20: 1

Details of Scheffler : (At the time of installation)

  • Total no. of mirrors: 382
  • Dimensions of 1 mirror: (20.5 * 18.2) cm
  • Area of 1 mirror: 373.1 cm2
  • Total Scheffler area:16 m2
  • Total Scheffler mirror area: 14.25242 m2
  • Each mirror is provided with a protective coating at the back side.


An infrared thermometer is a thermometer which infers temperature from a portion of the thermal radiation sometimes called black body radiation emitted by the object being measured.

fig. infrared thermometer 

They are sometimes called laser thermometers as a laser is used to help aim the thermometer, or non-contact thermometers or temperature guns, to describe the device’s ability to measure temperature from a distance.

Procedure :

fig.peanut fill in drum roster
  1. Measure the peanut and fill in the drum roster, close the door.
  2. Adjust the Scheffler focus point and concentration toward the drum roaster.
  3. start the motor and also measure the ambient temperature.
  4. then take a reading of drum roster temperature after an equal time interval.
Peanut rosting