Metrohm 732 IC Detector - Manual (Page 28)

2.6 Connection of 709 IC Pump
732 IC Detector / 733 IC Separation Center
21
2.6 Connection of 709 IC Pump
2.6.1 Electrical connection
For operation of the 732 IC Detector and 733 IC Separation Center you
can use any commercial HPLC pump. However, as the attainable sen-
sitivity depends to a large extent on the quality of the pump, Metrohm
advises use of the 709 IC Pump, which has been specially developed
for the demands of ion chromatography and has minimal pump pulsa-
tion and an outstanding flow constancy.
Startup and operation of the 709 IC Pump are described in the 709
Instructions for Use. The eluent, which must be degassed and filtered
(cf. section 5.1.3), is selected on the basis of the separating column in-
stalled in the 733 IC Separation Center and the current separation
problem (see 8.732.2003 IC Monograph).
The connection of the 709 IC Pump at the connection 15
15 of the 732
IC Detector is shown in Fig. 10. For this you can use the 6.2125.060
Cable available as an option or another RS cable specified as a "null
modem" cable. To ensure proper functioning of the communication
between the 732 IC Detector and 709 IC Pump, the sliding switch 36 36 on
the IC pump must be set to "RS 232" and the external control switched
on with key 88 (see 709 Instructions for Use).
6.2125.060 709
732
Fig. 10: Connection of 709 IC Pump
2.6.2 Pulsation dampener
To protect the column material against pressure drops caused by the
injector, the use of a pulsation dampener connected between the pump
and the injection valve of the 733 IC Separation Center is recom-
mended. The optional 6.2620.150 Pulsation dampener MF (see sec-
tion 7.3.1) is very well suited to this purpose.
The metal-free 6.2620.150 Pulsation Dampener is supplied fully as-
sembled and has two connections for capillaries, for which either the
connectors supplied or two 6.2744.010 PEEK compression fittings can
be used. The flow direction is arbitrary. The pulsation dampener is po-
sitioned in the interior of the 733 IC Separation Center on the base be-
low the injection valve (see Fig. 16 and Fig. 17).