Instruction Manual

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enting the decomposition vessel, which may contain poisonous gases should be
carried out using the venting station, C 7030, which is available as an accessory. If
the decomposition vessel is vented using the handle, C 7010.8, this must be done in
a fume cupboard. Make sure the decomposition vessel is completely vented to at-
mospheric pressure, otherwise it cannot be opened.
g
Open the decomposition vessel and check the crucible for signs of incomplete com-
bustion. If combustion was incomplete, discard the result and repeat the test.
h
Clean and inspect the decomposition vessel as described in Section 7.6.
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The C value that was determined the last time a decomposition vessel was cali-
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rated is always stored in the calorimeter. If several calibration runs were used to
calculate the C value (e.g. when calibrating to DIN), the calculated C value for the
decomposition vessel must be entered manually before making a calorific value test.
The C value is dependent on the decomposition vessel used. If the coding is used,
up to eight decomposition vessels can be automatically recognised by the calo-
rimeter. Then the instrument selects the appropriate C value for the current configu-
ration.
Starting from PHQX, follow the steps below to enter the C value manually:
c
Press the button once. PHQX appears in the LCD-display.
d
Press the function key I to go to the sub-menu PDQXDO. The LCD-display shows the
sub-menus KHDWFDS (C value) and PHDVXUH
e
Use function key I to select the sub-menu KHDWFDS The LCD-display shows the
enquiry ERPEQR
f
Use the alpha-numeric keys to enter the number of the decomposition vessel you
have used for the calibration. Later, this number will be printed on every measure-
ment protocol. Confirm by pressing the ↵ button, and the enquiry for the C value
appears in the LCD-display.
g
In the second line of the LCD-display, the last C value entered is given. Erase this
entry by pressing the GHO button repeatedly. Use the alpha-numeric keys to enter the
C value for the decomposition vessel previously specified.
h
Confirm by pressing the ↵ button. In the second line of the LCD-display, the enquiry
PHP VDYH appears briefly. Wait until this enquiry disappears again.