System Settings; Filling The Calorimeter For The First Time - IKA C 200 Operating Instructions Manual

MENU (F3)
 UP/DOWN (F2) to "General"
 OK (F1)
 Enter the calorific value in the format xxxxx
(default: 26460)
 OK (F1)
 BACK (F3)
Calibration values
Once you have calibrated the appliance, you will
MENU (F3)
need to enter the calculated C-values (calibration
 UP/DOWN (F2) to "General"
values) of all the decomposition vessels used.
 OK (F1)
 UP/DOWN (F2) to "Combustible crucible"
 OK (F1)
 Select the options "with" oder "without"
 OK (F1)
 BACK (F3)
Operator
You can assign each operator an ID number (0-9).
This number will appear on the results report.
MENU (F3)
 UP/DOWN (F2) to "Calibration values"
 OK (F1)
 UP/DOWN (F2) select desired decompositi-
on vessel
 Enter the C-value in the format xxxx
(default: 1)
 OK (F1)
 BACK (F3)
See the advice in section 5.4 Calibration.
MENU (F3)
 UP/DOWN (F2) to "General"
 OK (F1)
 UP/DOWN (F2) to "Operator"

4.6 System settings

 Enter ID code (default: 0)
 OK (F1)
In addition to the configuration described in sec-
 BACK (F3)
tion 4.5, you can apply other settings which are
not necessary for the correct functioning of the
appliance or which are only required for special
Unit of measure
applications.
You can set the unit of measure you want the
measuring results to be displayed in. The current-
Combustible crucible
ly selected unit of measure is marked with "=".
If you are using a combustible crucible, you can
enter this here. The value for the external energy
QExternal1 will then be automatically reduced by
50 joules as no cotton thread is used. The com-
bustible crucible itself must be weighed and the
resulting calculated energy value manually ente-
red under QExternal2 (see section . 6.3, ) so
that it can be taken into account as external ener-
gy when calculating the calorific value.
(default: without)
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MENU (F3)
 UP/DOWN (F2) to "Unit"
 OK (F1)
 UP/DOWN (F2) select the desired unit
(default: J/g)
 OK (F1)
 BACK (F3)
Measuring procedure
You can choose between four measuring proce-
dures:
MENU (F3)
 UP/DOWN (F2) to "Measuring procedure"
 OK (F1)
 UP/DOWN (F2) select desired measuring
procedure
(default: Isoperibol)
 OK (F1)
 BACK (F3)
Isoperibol
Calorimeter C 200 automatically performs the
measurement according to the standard for iso-
peribol calorimeters and calculates the provisional
result for you. The measurement takes approx. 17
minutes with excellent result reproducibility.
Manual
This is "student mode". You work according to
the standard for isoperibol / isothermal calorime-
ters. You read the temperature values off yourself
every minute, calculate the temperature drift be-
fore ignition, ignite and end the experiment by
pressing F1, calculate the temperature drift after
the temperature increase and calculate the result
itself.
Dynamic
Calorimeter C 200 performs the measurement
automatically and calculates the provisional re-
sult. The measuring time is reduced to approx. 8
minutes thanks to a dynamic correction process.
It is still possible, however, to meet the accuracy
specifications of the international standards.
TIP
Time control
Calorimeter C 200 performs the measurement
automatically according to a set period of time
and calculates the provisional result. The measu-
ring time is set at 14 minutes.

4.7 Filling the calorimeter for the first time

Before using the calorimeter for the first time
you must fill the outer vessel with tap water.
Destilled and/or deactveted water may not be
used!
To do this, pour two litres of tap water into the
filler of tank  (see section 4.1) using the measu-
ring cup provided.
The water must first be maintained at a constant
temperature. To ensure accurate results, the initi-
al temperature must not fluctuate too much.
Water temperature 18 °C - 25 °C with an ac-
curacy of ±1 °C during a measurement series.
You must now pump the water out of the tank
into the outer vessel:
MENU (F3)
 1st FILL (F2)
 Pumping procedure is started
Keep an eye on the water by pulling the filler of
tank  (see section 4.1) out the top.
When the overflow causes the water to run back
in the side of the tank, the outer vessel is full and
you must switch off the pump again by pressing
STOP OK (F2) once more.
You should change the water if it has been sitting
for a long time, see section 8.3.
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