Interface amplifier
To the interface amplifier you can connect signals
that you want to process like detector signals in the
chromatograph. The interface amplifier is identi-
cally with the TCD amplifier.
Input sensitivity
The interface amplifier covers three ranges dependent
on terminals used.
Input Range Impedance
green 0 ... 280 mV 1 k
Ω
brown 0 ... 1 V 2,7 k
Ω
white 0 ... 10 V 34 k
Ω
Range
Each range has a dynamic response of 10
6
. Five ranges
can be selected for the interface amplifier. The ranges
result in an attenuation from 2
0
to 2
4
. The table lists the
maximum detector signal in each range.
Zero adjustment
The microcontroller on the detector module adjusts the
zero using software functions if an autozero is triggered
manually or by a time program.
Connection of signals
Connect the signal to the terminal block. Refer to the
connection diagram below.
Range Input signal
Input 0 .. 1V
=> Full-scale
at recorder range
0
0
1
2
3
4
0 ... 30,5
µ
V
0 ... 31,25 mV
0 ... 62,5 mV
0 ... 125 mV
0 ... 250 mV
0 ... 500 mV
0
10
11
12
13
14
X8
X201
X202
Detector A
X 202
X 201
Detector B
X 202
X 201
X8
RUN
1
A
D
Signal
GND
20 Bit
GND
Mm
Mm
1
2
3
4
5
6
7
8
9
10
Interface
amplifier
X8
GND
280 mV
1 V
10 V
yellow
green
brown
white
2k7
1k
33k
Detector electronics
9DETEKT.CHP, Stand Dezember 22, 1999
9
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