178 Installation, Operation, and Maintenance
Part 3, Maintenance and Troubleshooting
11 Special Topics
Controlling Sample Vial Temperatures
This section explains how to connect tubing to the tray quadrants, how to
determine the water bath temperature needed to obtain an approximate
sample vial temperature, and the pressure limitations of the quadrants.
This section does not explain how to set up a water bath and pump.
You can control the temperature of the sample vials in the tray by:
• Pumping temperature-controlled liquid through the tray quadrants.
• Freezing an ethylene glycol and water solution inside the tray quadrants.
The quadrants are designed for low flow rates, low pressures, and long
temperature equalization times. If you freeze an ethylene glycol or alcohol
solution in the quadrants, fill the quadrants to less than 90% of their total
capacity.
Connect the tray quadrants
1 Connect a piece of tubing from the drain fitting on the tray to waste.
CAUTION
Ensure that the drainage tube is attached to the base of the tray and remove any
equipment from underneath the tray. When controlling for low sample temperature
with high ambient temperature or high humidity, water condensation from the
quadrants and tray could damage equipment under the tray.
Tray model Tubing size
G2916A
1/4-inch id (6.35 mm)
G2614A 3/8-inch id (9.53 mm)
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