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in the carry on
amplifier
The only way to check whether a tool has been calibrated is to review a calibration record, certificate or label to confirm that the most recent successful calibration was done recently enough. To check that a tool is IN calibration, use it to measure an item where the characteristic being measured is already known with high precision and confidence (called a standard). If the measurement result is close enough to the known value, then the tool is in calibration. Sometimes you might want to confirm or check the calibration by checking several standards with widely varying sizes or amounts.
to check the sensitivity of the instrument
thermometers today are used to generally see what the temperature in a room is they mainly use mercury to find this out :)
To check external interference of light
There are several types of thermometers. Clinical thermometers are used to measure the body temperature of the patient. Ear Thermometers make it an accurate point to measure the body temperature. Pacifier thermometers are used to check the body temperature of babies or infants. Underarm thermometers are kept in the underarms to measure the body temperature. Not to mention the food thermometers that are often used for checking the heat of the oil or pop up to let you know when the meat is done.
I found a very credible government website with all kinds of information about calibration, and different things that can be calibrated. You can check it out by going here www.nist.gov/calibrations/.
A scale calibration weight allows a person to check that a set of scales are reading the correct figures. This works by placing a calibration weight of which its exact weight is knows and checking that the scale reads the same weight. If not, then the scales will need to be calibrated.
Holmium oxide is used as standard reference to check wavelengts.
PROS:So the government can check for past charges on drugs or crime in the country they were in.Also so that they don't terrorize the country.So they should carry their papers!
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