IKA C 5000 control Package 2/12 - Manual (Page 71)

IKA  -WERKE C 5000 control/duo-control Ver. 10 04.07
3DJH
'HWHUPLQLQJ JURVV FDORULILF YDOXHV
'HFRPSRVLWLRQ YHVVHOV & DQG & DUH QRW SHUPLWWHG IRU H[SHULPHQWV
RQ IXHO VDPSOHV FDSDEOH RI H[SORGLQJ 1RWH LQ WKLV UHJDUG &KDSWHU ³)RU \RXU
VDIHW\´
7KH LQGLYLGXDO SDUWV DQG LQ SDUWLFXODU WKH WKUHDGLQJ RI WKH GHFRPSRVLWLRQ YHV
VHO PXVW EH FKHFNHG UHJXODUO\ IRU ZHDU DQG FRUURVLRQ 1RWH LQ WKLV UHJDUG 2S
HUDWLQJ ,QVWUXFWLRQV & RU &
The C 5000 calorimeter system is a precision measuring instrument for routine de-
terminations of gross calorific values for solid and liquid substances. Exact meas-
urements are only possible, however, if the individual steps of the experiment are
performed with great care. The method of proceeding as it is described in Chapter 1
“For your safety” and in the following sections must be adhered to precisely.
,I PRUH WKDQ RQH GHFRPSRVLWLRQ YHVVHO LV EHLQJ XVHG WKH UHVSHFWLYH LQGLYLG
XDO SDUWV PXVW QRW EH H[FKDQJHG EHWZHHQ WKH YDULRXV GHFRPSRVLWLRQ YHVVHOV
VHH WKH HQJUDYLQJ RQ WKH LQGLYLGXDO SDUWV
1RWHV RQ WKH VDPSOH
Substances of which the combustion behavior is not known must be examined for
their combustion behavior before combustion in the decomposition vessel C 5010 or
C 5012 (danger of explosion). If you are burning XQNQRZQ VDPSOHV , leave the room
or NHHS D VDIH GLVWDQFH between you and the calorimeter.
A few points must be observed in reference to the substances to undergo combus-
tion. Normally, solid combustion substances can be burned directly in powder form.
Substances that burn rapidly (for example benzoic acid) must not be burned in loose
form.
Benzoic acid must only be burned in the form of pellets! Combustible dust and pow-
der must be compressed into pellets before combustion. Oven-dry dust and powder
such as wood chips, hay, straw, etc. burn in an explosive manner! They must be
moistened first! Readily combustible liquids with a low vapor pressure must not be
come in direct contact with the cotton thread (for example tetramethyl dihydrogen
disiloxan)!
7KHVH VXEVWDQFHV WHQG WR VSDUN DQG FRPSOHWH FRPEXVWLRQ FRXOG WKHUHIRUH QR
ORQJHU EH JXDUDQWHHG ,Q DGGLWLRQ WKH LQQHU ZDOO RI GHFRPSRVLWLRQ YHVVHO
FRXOG EH GDPDJHG 6XFK VXEVWDQFHV PXVW EH SUHVVHG LQWR WDEOHWV EHIRUH
FRPEXVWLRQ
The IKA  tablet press C 21 is especially suitable for this purpose.
Most liquid substances can be weighed directly into the crucible. Liquid substances
with turbidity or water that will settle out must be dried or homogenized before being
weighed in. The water content of these samples must be determined.
For highly volatile substances, a gelatin capsule or acetobutyrate capsules (see ac-
cessories) are used. The gross calorific value of the capsules must be known so that
it can be taken into account in the resulting combustion heat as extraneous energy.
6ROLG
VXEVWDQFHV
/LTXLG
VXEVWDQFHV
+LJKO\ YRODWLOH
VXEVWDQFHV
☞
1RWHV RQ WKH
VDPSOH