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Getting Familiar with Your TriPlus RSH
Temperature Controlled Drawer
Thermo Scientific
TriPlus RSH User Guide
73
• Switch on the Temperature Controlled Drawer at least 30 minutes before an analytical
operation at +10 °C or 75 minutes before an operation at +4 °C.
• For high-throughput analyses – typical cycle time of 60 seconds or less per analysis – leave
the drawers open between injections.
• For longer cycle times, it is recommended to use the
System
option to close the drawer
after each sampling.
• Select the drawer-closing method from the
Cycle Activities
menu.
Condensation Build-up
Condensation build-up is directly related to the ambient temperature and humidity (dew
point). Long-term tests have shown very little condensation build-up in an environment with
relative humidity up to 60% and ambient temperatures of 22 °C ±2 °C.
Condensation at the bottom of the compartments will be channeled to the drain outlet
labeled
Condensation Drain
. The outlet is plugged with a paper filter.
This helps to evaporate the collected water in the drain line using the excess heat from the
Peltier element. A drain line from the outlet to a reservoir bottle is not necessary under normal
conditions.
Safety Warning
If a purge gas is used, it is your responsibility to ensure that a two-stage safety pressure
regulating device is installed between the gas supply and the Temperature Controlled Drawer.
If the Temperature Controlled Drawer is operated under severe conditions, a flow of clean and
dry (oil-free) air or nitrogen could be used to dry the compartments continually.
Connect the corresponding gas line to the Swagelok fitting (1/8-in.) at the back of the
Temperature Controlled Drawer
labeled
Purge Gas
. A flow of approximately
300 to 400 mL/min is required to keep the compartments moisture-free.
If using an application that produces an acidic vapor phase, use the same gas line connection
to flush a stream of inert gas, such as nitrogen or helium, into the compartments. A stream of
a few mL/min can help to avoid corrosion of the rolls. Checking the lines regularly for
condensation build-up is recommended.
It is good practice to clean the inside of the Temperature Controlled Drawer when changing
analytical samples. Dry out the Temperature Controlled Drawer at ambient temperature at
regular intervals. Open the drawers 1 to 5 cm to allow air circulation. The compartment
drying frequency depends greatly on the ambient conditions.
Note
Do not use any flammable or explosive gas such as hydrogen.
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