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Gemini User Manual

Gemini User Manual

acts like a variac, if the reaction is heating too slowly or you need more power (e.g., heating to high temperatures), give the heater more power by turning the power level up one setting. If the a solid state variac. Volume ranges are printed above this switch as a guide to select the correct power level since it’s easier to guess the volume

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Heating Mantles - Facilities Management

Heating Mantles - Facilities Management

Always plug the heating mantle into a grounded variable voltage transformer or percentage timer control (which runs at full power but cycles on and off to control the heat). Such devices are often known by the trademarked name, Variac (below, left) or MiniTrol (below, middle).

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CHEM C2507y Spring 2000 - Columbia University

CHEM C2507y Spring 2000 - Columbia University

Heat the mixture in the round-bottomed flask gently with a heating mantle plugged directly into the Variac placed over a magnetic stirrer. Do not turn on the HEAT on the stirring hot plate. Use the Variac, which controls the voltage to the heating mantle.

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PowerPoint Presentation

PowerPoint Presentation

Heating mantle (preferential, has to be plugged into a Variac to control the temperature), water or oil bath as a heat source. Additional joints are closed with a glass stopper and not with rubber septa. The glassware has to be prepared by flame-drying under vacuum:

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Model 210 210/Timer Manual - J-Kem Scientific

Model 210 210/Timer Manual - J-Kem Scientific

heating mantles for example, any size heating mantle can be used without the need to retune. When changing from heating mantles to a different type of heater, an oven for example, the controller should be tuned with values describing the oven’s heating characteristics. The effect of tuning is seen below.

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HS Section 7: Safety Info for Common Lab Equipment

HS Section 7: Safety Info for Common Lab Equipment

Heating Mantles. 1. When used with auto-transformers (variac or powerstat), make certain that the auto transformer is properly wired. 2. The temperature of heating mantles can be effectively controlled with solid state controllers (approximate cost, $100) with a feedback sensor sensing the temperature of the heated liquid. 3.

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Heating Mantles -

Heating Mantles -

Heating Mantles. The two types of heating mantles used in the organic chemistry teaching labs are shown below. They are shown plugged into a Variac (in the back of the photo), since heating mantles are NEVER plugged directly into the outlet.. The heating mantle on the left is …

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RT-100 Limit Controller Manual -

RT-100 Limit Controller Manual -

hexane and ethyl acetate in a distillation flask equipped with a heating mantle. The heating mantle plugs into a variac which is set at a power level great enough to cause a reasonable rate of distillation, then the variac is plugged into the RTU. Hexane boils at 69o C, so a set point of 70o C is entered into the J-KEM 3300. Since

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Orgo II Lab Final Flashcards - Quizlet

Orgo II Lab Final Flashcards - Quizlet

In order to heat a round bottom flask in a heating mantle, plug the heating mantle into a Variac or Powermite. Turn the heat up gradually, and do not exceed 50-60% of the maximum output of the device What is meant by the term bumping?

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Sciencemadness Discussion Board - Heating mantle/variac

Sciencemadness Discussion Board - Heating mantle/variac

Nov 05, 2015 Heating mantle/variac Hello all, first post after months of lurking. I bought glassware,a variable temp heating mantle with stirrer and a variac. Total novice at chemistry and am only looking to distill ethanol and use it for soxhlet extractions. So I set up the glass to distill the ethanol from a bottle of Everclear, plugged the mantle into ...

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Separation of Liquid Mixtures by Simple and Fractional - StuDocu

Separation of Liquid Mixtures by Simple and Fractional - StuDocu

Process for the Simple Distillation: 1- Put 10 mL 1:1 Put 10 mL 1:1 mixture of ethyl acetate/butyl acetate in the 25 mL RBF, and 25 mL heating mantle around it. 2- Place a 10ml graduated cylinder, receiver, to the neck of the vacuum adapter. Then heat the mixture.

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Oil Baths in Laboratories Environmental Health and Safety

Oil Baths in Laboratories Environmental Health and Safety

The electric heating coil (or oil bath on a hot plate) is controlled using a variable voltage controller (i.e., Variac). The voltage controller is adjusted to increase or decrease the temperature setting of the oil bath. Heating mantles should NEVER be plugged directly into an outlet. Comparison of Heating Assemblies

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Exp 3 - Distillation - F17

Exp 3 - Distillation - F17

The flask is situated into an appropriately sized heating mantle. The heating mantle should not be plugged directly into an outlet. The heating mantle should be plugged into a variable voltage controller (variac), which is then plugged into a wall outlet. Make …

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Heating mantle - chem.ucla.edu

Heating mantle - chem.ucla.edu

The heating mantle will burn out rapidly. It is imperative that it is plugged into a variac (power control). b. The size of the heating mantle has to match the size of the flask. Heating mantles that are too big or too small do not provide a good heat transfer; the heating mantle will overheat and burn out quickly. In some cases, a better heat ...

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Columbia University in the City of New York

Columbia University in the City of New York

The variac is a device that modulates AC current. Wall current is 120 V; a variac can adjust that to anywhere between 0 and 120 V. Plugging the heating mantle into a variac allows you to control the temperature by controlling the voltage supplied to it. Test the mantle and variac by briefly turning the dial up to 100%.

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Distillation of Safrole - [www.rhodium.ws] - mdma

Distillation of Safrole - [www.rhodium.ws] - mdma

There are two primary methods of heating the oil in the flask. One simple method for heating the oil has the clamped flask sitting on an electric heating mantle that is controlled by a variac. The heating mantle rests on a stirrer (or a hot plate stirrer although the heat is never turned on).

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Thinkwell - Cengage

Thinkwell - Cengage

Thinkwell. Perhaps you've seen one of my favorite television shows, M.A.S.H. It starred Alan Alda and in that show, a recurring. theme shows Hawkeye and B.J. drinking from their still that. they are distilling alcohol and particularly they are distilling. gin and then they are drinking it to make themselves happy.

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Temperature controller Water heating Electrothermal

Temperature controller Water heating Electrothermal

to the mantle. The mantle is supported in an aluminium case, and the space between it and the mantle is packed with glass wool. The unit supplied for the test was a type M. 105, I-Iitre mantle consuming 300 watts. The current was controlled by a type 200 CMH Variac controller.

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Glassware and Equipment

Glassware and Equipment

You will also find a Variac or variable voltage supply unit at each of your work stations. These Variacs are usually attached to the racks by your work station and are to be used whenever you wish to control the power delivered to an apparatus, usually a heating mantle. Your instructor will demonstrate their use.

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Experiment 4: Purification of Liquids by Distillation

Experiment 4: Purification of Liquids by Distillation

you will use to heat the flask. 4. Your heating mantle has a separate cord – be sure to securely plug and twist the cord on, then slide the heating mantle under the round bottom flask and adjust the iron ring so the flask is snuggly nestled inside the mantle. Plug the heating mantle into the Variac (which should be set to “off” and a ...

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