Changing the polarity
Negative peaks can be output as positive on the re-
corder by entering Polarity negative. Negative peaks
are obtained e.g. with TCD if the carrier gas is argon, or
if components are also measured in the reference
branch.
Select the function Signals in the selection display, and
move the cursor to the desired channel. Then press
.
Damping
The damping of the recorder signal can be set in five
steps. A damping of 0 to 4 corresponds to a time con-
stant of 40 to 400 ms. This damping has no effect on
the integration!
Select the function Signals in the selection display, and
move the cursor for the desired channel to the line
Damping. Enter the desired value using the numeric
keypad and then confirm using .
Baseline offset
The recorder output can output negative signals down
to -1 mA. If you wish to output small negative peaks on
the recorder without adjusting the recorder itself, you
can raise the zero line for the recorder output. This
baseline offset can be adjusted to 0 to 99 % of the
recorder output.
Select the function Signals in the selection display, and
move the cursor for the desired channel to the line Ba-
seline offset. Enter the desired value using the numeric
keypad and then confirm using .
F8: change polarity
RETURN
RETURN
Chromatogram on the recorder
10
5SCHREIB.CHP, Stand Dezember 22, 1999
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