IKA C 2000 control - Manual (Page 74)

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IKA  -WERKE C 2000 basic / control Ver. 04 08.07
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2 ILOO A decomposition vessel that has been suspended in the
measuring cell cover is filled with oxygen. The measuring cell
cover will be closed for the duration of the filling process. The
procedure ends automatically about 60 seconds after the
cover is opened.
If no decomposition vessel is in place, the oxygen valve will be
opened for one second.
The procedure is displayed in the process window.
In order to ensure problem-free operation over a long period of time, the mainte-
nance tasks described below must be performed on the calorimeter system.
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Remove the sieve element from the inner vessel and if there is visible dirt clean the
inner vessel sieve in clean water or in an ultrasound bath.
After washing, place the sieve back on the inner vessel adapter.
Operating the device without a sieve element can cause dirt to accumulate in the
valves, thus resulting in failure of the device.
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If the filter in the water feed line is partially blocked, the flow of water in the unit may
be reduced. This will reduce the regulation quality of the system.
You can check this by using the maintenance menu item 7HPSHUDWXUH .
If the flow rate is normal (between 60 and 70 litres per hour), the target value cur-
rently set (25 °C or 30 °C) will be reached in a short time. The temperature tolerance
is ±1 °C. When carrying out this check, it is important that the cooling water tem-
perature (at the input to the unit) is within the guidelines given below. In the info-
window, the duration of the last filling operation (FT) and the flow quantity (F) calcu-
lated from it are shown.
Guidelines
• Cooling water temperature 18 °C to 20 °C: working temperature 25 °C
• Cooling water temperature 23 °C to 25 °C: working temperature 30 °C
In addition, the time to fill the inner vessel with water may be extended. If the upper
time limit of 240 s is exceeded, the system will show an error message and the
measurement will be broken off. (See also Section 12 „Troubleshooting“)
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