TE-BBR Instruction and Operation Manual
After the instrument is turned on it is necessary to add additional ethylene glycol/water mixture to
the Exchanger when the unit commences operation. You will be able to observe the liquid
circulating through the tubing. If air bubbles are consistently visible in the coolant lines, add
additional mixture until the Exchanger reservoir is full.
Before turning on the power switch, make sure that the cross-shaped magnetic stirring bar
(supplied) is placed in the center of the bath section of the Control Unit. The circulator guard should
be placed over the stirring bar, and the speed adjustment knob, located on the right rear panel
(front view), should initially be turned counter-clockwise to its lowest setting.
Turn the power switch (located at the rear of the Control Unit) to the ON position, and continue to
add additional water/ethylene glycol mixture to the reservoir until it reaches the previous level. You
will be able to observe the liquid circulating inside the reservoir from the opening at the top.
Turn the power switch to the OFF position.
Prepare the Temperature Bath
Select a Bath Liquid
The ideal bath liquid has a low viscosity, high heat capacity, and low vapor pressure over a wide
range of temperatures. This liquid also has a very high flash point and is relatively inexpensive.
Methyl alcohol (methanol) is very close to the ideal liquid; it can be used at all temperatures in the
TE-BBR’s operating range. However, methanol may not be suitable for some laboratories because of
its low flash point and degree of toxicity.
Ethyl alcohol is less toxic than methyl alcohol and somewhat less volatile. A commercially-available
grain alcohol (such as Everclear®) may be used down to -40 °C. Alternative low-temperature liquids
are available.
Caution: Methyl alcohol is a flammable and toxic liquid. Use care when handling
and keep away from open flame or sparks. Do not add bath liquid while TE-BBR
power is ON.
Fill the Bath with Liquid
After selecting a suitable bath liquid, fill the bath to the fill line (approximately 5 liters).
Caution: Do not overfill the Bath as this will result in damage to the Load Cell.
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