Isothermal bomb calorimeter
ISO 1928
Digital Data Systems
Isothermal covers both static jacket (CAL2K) and Isoperibol systems.
Isoperibol calorimeters control the temperature of the surrounding jacket so that it is at a constant temperature.
The static jacket has a thermal capacity such that the temperature of the surrounds remains nearly constant without active control. The variation in the static jacket is measured and compensated for.
Bomb construction:
CAL2K: The vessel has a stainless body with an aluminum sleeve pressed over it.
Isoperibol: Stainless steel.
Temperature measurement of surrounds:
CAL2K: The ambient box containing the polystyrene (static jacket) is monitored throughout the determination.
Isoperibol: The jacket is water maintained at a constant temperature.
Temperature measurement of energy:
CAL2K: Sensors placed between the stainless steel body and the sleeve measure the energy released during a determination. A microprocessor is built into the vessel making the calibration independent of the calorimeter.
Isoperibol: The vessel is placed in a bucket of water and then the temperature of the water in the bucket is measured.
