Thermo Scientific FOCUS GC, Инструкция по эксплуатации

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Chapter 8
Flame Ionization Detector (FID)
Detector Signal Parameters
166 Instruction Manual
Detector Signal Parameters
The detector
SIGNAL
menu contains the parameters that control the detector
signal. As compounds elute from the column and enter the detector, an electrical
signal is generated. The size of the signal is related to the amount of the
corresponding compounds. The detector’s electronics process the signal and send
it to a recording device. The plot of the signal size versus the time results in the
chromatogram.
In Main Menu move the cursor until
Signal
is selected. Press ENTER to display
the
SIGNAL
menu.
SIGNAL
Output (1000000)
Offset 100000
Run autozero On
Range = 10^ (0..3) 0
Table 8-2. FID Signal Parameters
Parameter Range Description
SIGNAL
This line is the title bar
Output
Not editable This is the actual electrometer output signal expressed in
gV. The
Autozero
function forces this value to 1000
corresponding to the zero level of the baseline on a
recording device. You cannot enter a setpoint here.
Offset
0 to 100000 This is a value in counts that may be subtracted from the
Output signal to adjust the baseline level. This
parameter may be manually or automatically set using
the
Auto zero
function. The range of the suppression
is variable and related to the output signal.
Run autozero
On - Off This function forces the output signal to 1000 (zeroing).
Set On to zero the detector signal.
Range
10 0 - 10 3
1, 10, 100, 1000 nA This parameter sets the electrometer amplifier input
range. 10 0 are the most sensitive.