2006-08-11 06:06:30 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
Precise calibration requires well-controlled condition or a use of another device which readings are guarantied as in a standard. Let us consider controlled conditions since comparing against a standard is straightforward.
A water turns into ice at temperatures below 0 degrees Centigrade and boil at temperature of 100 degrees Centigrade. In other the melting point of water is 0°C (32°F, 273 K) however it is true only at 1 atmosphere (750 mm of Mercury, 14.50 psi). You must consult phase diagram for adjustment of temperature to an actual pressure reading during measurement. See reference. When the thermometer stabilizes mark the 0 degree C or 32 degrees Fahrenheit.
Similarly bring water to a boil and mark the 100 degrees Centigrade or 212 degrees Fahrenheit.
Note: Do not use mercury thermometer in temperatures below 39 degrees C as mercury will turn to solid.
2006-08-11 08:05:41 · answer #1 · answered by Edward 7 · 0⤊ 0⤋
Filled thermometers are generally calibrated in Std ref. furnace oven and compared with oven temp. the error is calculated accordingly
2006-08-11 13:53:05 · answer #2 · answered by sms 2 · 0⤊ 0⤋