Agilent 7697A Headspace Sampler
G4565A Cooling Plate Accessory Installation Guide
13
Features and Specifications
This section describes some of the features and specifications of the
cooling accessory.
Temperature
All 108 vial positions in the vial racks can be cooled to 4 °C or heated to
80 °C.
The center of each vial location temperature can vary within +1 to - 3 °C
of the cooling plate sensor reading.
Cooling source
Depending on your lab conditions, you may need to set your cooling
source to a lower temperature value than the desired temperature setpoint,
as coolant temperature losses can occur between the cooling source and
cooling plate.
Coolant
Use only distilled water, ethylene glycol, or propylene glycol as coolant.
Water bath and pump specifications
The water bath and pump system used to control the sample vial
temperatures must meet the following specifications:
•
The components must meet national standards for safety requirements,
be suitable for unattended operation, be suitable for continuous
operation, and be controllable for high- temperature protection.
•
The recommended coolant temperature range is 4 to 80 °C.
•
If you use a built- in pump, it must be suitable for external circulation
of liquid and for connection of 1/4- in od (6.35 mm) tubing or larger.
•
If you use a pressure pump, it must maintain a pressure from 1.5 to
2.5 psi.
•
If you use a suction pump, the pump vacuum cannot exceed –4 psi.
•
Typical recirculator cooling power capacity varies from 1000 to
2000 watts.
N O T E
The three priority sample positions on the cooling plate assembly are not
temperature controlled.
