Detectors
Switching off the TCD bridge current
Select the function Signals in the selection display. En-
sure that you select the correct channel! Position the
cursor to the column of the detector you wish to switch
off. Then press the key .
Adjusting the detector current
The TCD requires a bridge current, the ECD a refer-
ence current. Select the function Signals in the selection
display. Move the cursor for the desired channel to the
line Bridge/Reference current. Enter the desired value
using the digit keys, and confirm with .
TCD status display
The chromatograph indicates in the display Signals
whether the TCD bridge is switched off or on.
TCD bridge monitoring
The chromatograph switches off the bridge current if
the bridge resistance becomes too large and signals
Alarm.
The exact mode of operation of the bridge current
monitoring function is described in Register 9: TCD
electronics.
Changing the polarity
of the TCD signal
Select the function Signals in the selection display. En-
sure that you select the correct channel! Position the
cursor to the column of the detector you wish to adjust.
Then press the key .
NOTE:
Ensure that the cursor is in the display area
Detector
. Other-
wise the function acts on the recorder instead of on the detec-
tor amplifier!
The exact mode of operation of the polarity switching
function is described in Register 9: Detector elec-
tronics.
Compensating the baseline current
Adjusting the TCD bridge
Select the function Signals in the selection display. En-
sure that you select the correct channel! Position the
cursor to the column of the detector you wish to adjust.
Then press the key .
The exact mode of operation of the compensation func-
tion is described in Register 9: Detector electronics.
F6: TCD switch off
RETURN
F8: change polarity
F9: autozero
Detectors
5DETEKTO.CHP, Stand Dezember 22, 1999
5
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