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Getting Familiar with Your TriPlus RSH
Temperature Controlled Drawer
72
TriPlus RSH User Guide
Thermo Scientific
Temperature Control
The cooling/heating capacity of a temperature control device based on the Peltier technique is
always relative to room temperature. The maximum temperature difference that can be
reached between the device and ambient temperature is limited. The Temperature Controlled
Drawer can attain a minimum of 14 °C (TΔ) below ambient temperature.
The controller allows the user to set a range of temperatures from +1 °C to 45 °C.
The actual temperature range selections are greater than the actual specified limits
(+4 °C to 40 °C). This allows to reach the desired temperature to be reached more easily when
the ambient temperature is too high or too low. For example, heating to a higher temperature
could be important for metabolism or kinetics studies at the human body temperature of
37 °C.
The cooling option is usually necessary to protect the sample from higher ambient
temperatures during the analytical run time.
Temperature Controlled Drawer is rarely used to store a sample at a given temperature for
prolonged periods.
The displayed temperature represents the temperature in the compartment and not in the
sample liquid. To verify the temperature independently, insert a temperature probe at the
front of the compartment by removing one plastic screw from the front cover. Position the
probe in the middle of the drawer where the Tray separator projects upwards.
Tape the probe to the metal plate of the drawer.
To reach +4 °C in the analytical solution, program a set value lower than +4 °C. The material
used to contain the sample may be glass, polypropylene, polyethylene, or similar polymer
products. All of these have excellent insulating properties.
If the sample has to be cooled as low as +4 °C, it is advisable to cool the sample Tray first in a
refrigerator before the Tray is placed into a Temperature Controlled Drawer. This shortens the
cool-down time.
Temperature Alarm
A fuse to prevent overheating is built in for unattended automated runs. The Peltier element
will turn off automatically at +72 °C ± 5 °C.
A damaged over-temperature fuse must be replaced by an authorized Thermo Fisher Scientific
service engineer.
Temperature Stability
It is recommended observing the following the guidelines:
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