INT7 A/D Converter 3 Installation
3.3 Connection with chromatograph
Connect the cables according to one of the following diagrams in the Fig 3
on pg 6. Use the symmetrical connection only when you are sure that the
chromatograph/detector is equipped with a symmetrical output – it is
necessary to read through the instructions for the corresponding
chromatograph.
All current DataApex A/D Converters INT7,INT9,U-PAD,U-PAD2 and
Net-PAD use the same standard INT7 Connector.
Note: A description of the INT7 connector can be found in the chapter
"Tables and specifications" on pg 35.
Fig 3: Connecting Clarity to chromatograph
3.3.1 Connection of signal cables
Signal inputs of the A/D converters are symmetrical: + (red), - (white) and
analogue ground (copper braiding).
Caution: Shielding must be connected. It serves not only as the shielding but also as
the analogue earth against which the measurement takes place. In the
case of asymmetrical output of a detector (only two connectors) shielding
must be connected to the white lead! No lead of the signal cable may
remain unconnected.
Try to connect to the detector output of the chromatograph with the largest
possible signal level, usually indicated in the chromatograph as
INTEGRATOR (signal approx. 1 V). The level of the signal on the output
marked RECORDER is usually only approx. 10 mV. For easier alterations
of the wiring, we supply a SV9 Terminal board with screw contacts for
INT7,INT9,U-PAD,U-PAD2 and Net PAD A/D converters.
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