U-PAD2 A/D Converter
3 Installation
3.3 Connection with chromatograph
Connect the cables according to one of the following diagrams in the
. 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
Fig 7: 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 approximately 1 V). The level of the signal on the
output marked
RECORDER
is usually only approximately 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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