Operation Guide
Controlling Sample Vial Temperatures
20
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 a 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.
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 a low sample
temperature with a high ambient temperature or high humidity, water
condensation from the quadrants and tray could damage equipment under the
tray.
Connect the tray quadrants
1. Connect a piece of 1/4-inch id (6.35 mm) tubing from the drain fitting on the
tray to waste.
2. Connect the tray quadrants together using 1/4-inch id (6.35 mm) tubing as
shown in Figure 12.
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