It is used to determine the
absolute heat
of combustion of foods (calorific values). It may also used to find out relative values of heat of
combustion of a series of
foods by comparing the rise of temperature of a fixed volume of water when a constant mass
of a substance is burnt
completely. Apparatus Comprises of two
assemblies; a) Calorimeter Unit b) Base Unit The
Calorimeter unit carries heat exchanger unit and base unit has crucible
holder, ignition system etc. etc. a) Calorimeter Unit Comprises of a glass water jacket 150 x 80 mm (Ht x dia) surrounding a
combustion chamber
integral with it and open at its base. This combustion chamber is connected to a copper spiral heat
transfer tube.
The upper end of this tube passes through a hole in the lid on top and when in use is connected to a filter
pump to
draw the products of combustion through the copper spiral. A wire stirrer also passes through the cover and a hole
with a bored rubber stopper is provided to accommodate a thermometer. Supplied complete with thermometer -5 to + 50°C
x 0.10C
(Mercury in glass) b) Base Unit Metal disc about 100 mm dia with a boss for mounting on 12mm retort rod
(without rod). The unit works as the base of the combustion chamber and has inlet tubule 6 mm diameter for oxygen
supply
(oxygen supply is necessary to completely burn the food) and pair of pillars carrying low voltage igniter
coil. Also having a
moveable crucible support to enable the crucible to raise to the level of igniter coil from
outside the assembled apparatus.
Supplied without retort stand, crucible or spirit lamp. Spare and
Accessories Spare borosilicate glass calorimeter jacket (150 x 80mm, L x
Dia) P-2400/1 Spare igniter coil
pack of 5
Pcs. P-2400/2 Nickel
Crucible, one Pc. P-2400/3 Retort stand & base : Tripod 'A' base with rod P-2400/4 Spirit
lamp for volatile samples
P-2400/5 Low Voltage Supply Unit 12 V : Pl. see
Power Supply Section. Oxygen Gas supply with regulator : To be obtained locally. |
