Introduction to the Agilent 7100 Capillary Electrophoresis System

7 Hardware Information
External Water Bath for Tray Cooling (Optional)
External Water Bath for Tray Cooling (Optional)
The two connections on the left rear of the instrument (see Figure 2 on
page 59) can be used to install an external water bath for the tray of the
Agilent CE instrument.
The temperature for the cooling liquid is set at the external water bath. The
temperature display in the CE diagram displays the actual temperature of the
tray controlled by the cooling liquid. The external water bath cannot be
controlled by the Agilent CE instrument.
Good Practices
To avoid problems when using the external water bath, consider the following
points.
• The tubes used should have thermal insulation to avoid condensation.
• Use a displacer to minimize the amount of liquid that is released in case of
leaking cooling lines.
• The device should be equipped with a liquid level sensor to switch off
automatically if liquid is lost.
• Do not operate the devices at temperatures below +1 °C to avoid formation
of ice on internal surfaces.
External Water Bath Requirements
• Minimum cooling power 100 W, at bath temperatures of 5 °C.
• Temperature precision better than ± 0.2 °C.
• Safety requirements must meet national standards and also: be suitable for
unattended operation, be suitable for continuous operation, and have
controllable high temperature protection.
• Requirements for external liquid circulation:
Suitable for external circulating of liquid,
Suitable for connection of 8 mm ID tubes,
Minimum circulating liquid flow rate 8 L/min,
184 Agilent 7100 Capillary Electrophoresis System User Manual