Isoperibolic Operating Mode


An isoperibolic bomb calorimeter is a calorimeter where the jacket temperature is kept at a constant temperature while the calorimeter vessel (bomb and bucket) temperature rises as heat is released by the combustion of a sample.The jacket and bucket temperatures are continuously measured enabling the heat loss to be corrected for after the test.


An embedded control computer, keypad and LCD enables instrument automation, data acquisition and analysis via user friendly menu driven software.


Automatic Temperature Control of Outer Bath


The embedded control computer automatically sets the outer bath temperature.The temperature is measured using a high precision, high resolution platinum resistance thermometer (PRT).An external thermostatic controller, bath, circulator and cooler is supplied as standard together with a pipette for temperature controlled filling of the calorimeter vessel.This removes human error increasing repeatability and significantly reduces the preparation time between tests.


Oxygen Filling System


To simplify instrument operation the FTT Bomb Calorimeter is fitted with a semi-automatic filling system.The user merely connects the push on coupling and presses the key to fill the bomb with oxygen.The bomb fills to the desired pressure and automatically switches off. If this pressure is not reached an error message is shown.


Automatic Firing


The embedded computer controls the temperature of the outer bath and shows when the calorimeter vessel temperature has stabilised. At this point the bomb is automatically fired.


Calibration


The FTT bomb calorimeter is calibrated by burning certified benzoic acid to determine a constant called the ‘water equivalent’.The instrument can record the water equivalent for several bomb/bucket combinations. For each bomb/bucket combination five calibrations are performed.The software calculates the average of these five calibrations and uses this value as the water equivalent when testing a sample.


Thermostatic controller, bath, circulator, cooler and pipette supplied as standard with every apparatus


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