IKA C 2000 control User Manual
Page 20
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The C 2000 calorimeter does not have its own cooler unit.
The system can optionally be operated with a standard commercial cooler or ther-
mostat with water filling (for example the IKA
KV 500) or can be connected to a
cooling water line.
For thermostat operating mode, only water with a stabilizer additive (for example
Aqua-Pro) should be used.
Do not use distilled or deionized water.
The control range is limited in terms of control quality. The cooling water tempera-
ture should therefore not fall below 12°C. The upper temperature limit of the cooling
water is 23°C in 25°C mode or 28°C in 30°C mode.
If the temperature falls short of or exceeds the cooling water temperature range, a
malfunction message to this effect appears on the display (see Section 12.1).
An internal safety valve is used to adjust the water flow rate on the KV 500 cooling
water supply to a value between 60 and 70 litres per hour.
If the device is connected to a cooling water line, the pressure on the input side
must not exceed 1.5 bar.
If necessary, you should ensure this by placing a pressure control valve (for exam-
ple the IKA C 25) far enough forward in the circuit.
Another important characteristic value for connecting a cooler/thermostat is the
switch-off level (the minimum volume).
The inner vessel of the calorimeter is filled with about 1.5 liters of water for meas-
urements. It must be possible to provide this quantity from the cooler/thermostat.
The temperature of the cooling water (on the intake side) determines the working
temperature, i. e. the starting temperature of the water in the inner vessel of the
calorimeter.
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On this subject, see also Section 6.4, Turning on the
system.
The calorimeter automatically tests the cooling water temperature each time after
the device system is turned on. You can also optionally activate an automatic verifi-
cation before every measurement.
The system also offers you the possibility of querying the cooling water temperature
manually (see Section 11.1, “Maintenance menu”).
The cooling water temperature has no effect on the “isoperibolic” or “dynamic”
modes.
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