Quote:
Originally Posted by Trollhole
Thermometers.
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Here are some steps I stole of the net.
1Step OneBring a small pot of water to a boil.
2Step TwoFill a short glass with water and plenty of ice.
3Step ThreeRemove the thermometer from its plastic guard and place it in the boiling water.
4Step FourIf it doesn't read 212°F (100°C), turn the nut behind the face with needle-nose pliers. Only tiny adjustments are required; recheck as needed.
5Step FivePlace the thermometer in the ice water.
6Step SixIf it doesn't read 32°F (0°C), adjust the nut. Once it is properly calibrated, the thermometer will read the correct temperatures of both boiling and iced water.
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Ice water will be closer to 39° F (4° C). 4° C is a common desired temperature in the molecular biology lab because DNA and other things are stable at that temp. We use ice water baths to achieve it.
Otherwise a decent method.