IKA C 7000 Grundausstattung Set 2 - Manual (Page 51)

IKA  -WERKE C 7000 Ver. 07 09.07
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When a calibration or a calorific value determination has been prepared as de-
scribed above, the measuring process can be started. The VDPSOH FRGH shown on
the LCD-display informs you of the test parameters which will be used for the meas-
urement. Pressing the
↵
button starts the calibration or calorific value determination.
From now on, the C 7000 calorimeter takes control. The measurement process is
made up of a pre-test and the main test. The current phase of the test is shown on
the LCD-display. During both the pre-test and the main test, you can follow the tem-
perature changes in the decomposition vessel on the LCD-display. From the start of
the test, they are updated every 1.5 seconds. In the second line of the LCD-display
you can also see the duration of pre-test or main test, which is indicated by an ex-
tending bar.
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The end of the test can be seen on the LCD-display or on the print out. As long as
the value has not been entered in the sub-menu UHDOW (Real time printout), during
the test the printer will print the current temperatures at the set time intervals and the
result at the end of the test. In the first line, the LCD-display shows the temperature
increase in Kelvin and, for a calibration, the provisional C value in the second line.
The following steps must be carried out when the test has been completed:
c
The green LED blinking near the 9 button indicates the end of the test. Acknowl-
edge this by pressing the 9 button. If the button is not pressed, an acoustic signal
sounds after about five seconds, as an additional means of making you aware that
the test has ended. It sounds for about 30 seconds if it is not acknowledged. After
that, the LCD-display returns to PHQX in the main menu.
d
Open the cover of the measuring cell by lifting the upper section of the instrument
and pushing it backwards. The result of the test just carried out then appears on the
LCD-display. Use the carrying and venting handle, C 7010.8, to lift the decomposi-
tion vessel out of the measuring cell.
e
So that the next test can take place under the same temperature conditions, the
energy absorbed by the decomposition vessel must be removed again. The C 7002
cooler fulfils this function. Place the decomposition vessel vertically in the cooler.
The cooling jaws close automatically. The display shows the temperature difference
between the decomposition vessel and the calorimeter in percent. During the cool-
ing process, this value progressively approaches zero. When the temperature of the
decomposition vessel is the same as the calorimeter temperature, this is indicated
by repeated, short acoustic signals. The cooling jaws open at the same time. Re-
move the decomposition vessel using the carrying and venting handle, C 7010.8.
The cooler can be manually controlled using the RSHQFORVH button. Pressing the
RSHQFORVH button during the cooling process opens the cooling jaws. If the button is
operated again, the jaws close again and cooling is continued. Cooling only contin-
ues as long as the decomposition vessel is at a higher temperature than the calo-
rimeter.
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