Why should we shake a thermometer before use?

The shaking is to reduce the level of the medium in the thermometer to a temperature well below normal so that an an accurate temperature can be read after using.

Should lab thermometers be shaken before use?

Do not “shake down” thermometers or use it as a stirring rod. Thermometers break easily. You must ask for help in cleaning up broken thermometers in order to prevent mercury contamination in the lab.

Why does a doctor shake a clinical thermometer?

Name the Liquid commonly used in clinical thermometers. Why do doctors shake a clinical thermometer before using it on other patients? To force mercury back to the bulb in order to get correct temperature readings.

How do you shake a fever thermometer?

Starts here2:59How to Use a Mercury Thermometer – YouTubeYouTube

Why does his brother suggest him to shake a thermometer slowly?

After one hour he thought to check his fever through a clinical thermometer, so before using it, he washed it and started shaking it very fastly in his hand, so that the mercury level of thermometer gets reduced. At the same time, his elder brother Vishwas scold him and suggested him to shake the thermometer slowly.

Why is it important that your thermometer not touch the bottom of the can?

Suspend the reservoir (the tip) of the thermometer below the surface of the solution, but do not allow the tip to touch the walls or bottom of the container. If the thermometer bulb touches the container, the temperature of the glass will be measured instead of the temperature of the solution.

What should be done to a thermometer before using it to test a food temperature?

Always clean and sanitize the thermometer before use. Use the appropriate thermometer for the type of food (liquid or solid). Insert the thermometer into the coldest part of the product. In liquid products, stir before taking the temperature reading.

What is jerk in thermometer?

The jerks given to the thermometer before using it in order to get an accurate reading, the jerks allow the mercury level to flow into the bulb, below from the normal temperature.

Why is mercury used in the doctors thermometer?

Mercury is the only one in liquid state at room temperature. It’s used in thermometers because it has high coefficient of expansion. Hence, the slightest change in temperature is notable when it’s used in a thermometer. It also has a high boiling point which makes it very suitable to measure higher temperatures.

Why does a thermometer shake when reading a temperature?

The shaking is to reduce the level of the medium in the thermometer to a temperature well below normal so that an an accurate temperature can be read after using. You see, the way a thermometer works is on the premise that as the mercury heats up, and most fluids as well, it expands.

How do I “shake down” a glass thermometer?

2.10 How do I “shake down” a glass thermometer? 1 (1) If the thermometer reading is below 94ºF (34.4º C), you have shaken down the thermometer sufficiently. 2 (2) If the thermometer reads 94º F (34.4º C) or above, continue to shake down the thermometer until a desired reading is… More

How does a digital thermometer work?

The current digital ones work differently. Thermometers used for taking people temperatures are a special kind that go up with heat but don’t go down with cold. So you have to shake a thermometer before taking your temperature to make the reading go down below your own temperature. Then the thermometer can go up again to read your temperature.

How do you know if the thermometer is working properly?

After shaking down the thermometer, read the temperature shown in order to evaluate the effectiveness of your efforts. (1) If the thermometer reading is below 94ºF (34.4º C), you have shaken down the thermometer sufficiently.