Resistance measurement The common values of resistancefor a platinum RTD range from 10 ohms for the bird-cage model to several thousand ohms for the ï¬ lm RTD. The single most common value is 100 ohms at 0Â°C. The DIN 43760 standard temperature coefï¬ cient of platinum wire is Î± = .00385.he four-wire resistance measurement may not be required as it is with RTDâs. For example, a common thermistor value is 5000 Ï at 25Â°C. With a typical TC of 4%/Â°C, a measurement lead resistance of 10 Ï produces only .05Â°C error.
Cirrocumulus clouds are usually seen in the winter and indicate fair, but cold weather. In tropical regions, they may indicate an approaching hurricane. Alto Clouds Altostratus clouds are gray or blue-gray mid level clouds composed of ice crystals and water droplets.
Observing the Sky. 1. Examine the clouds. The types of clouds in the sky, as well as the direction in which they're moving, can tell you a lot about upcoming weather. In general, clouds that are white and high indicate good weather, and clouds that are dark and low mean rain or storms are on the way. The presence of cumulonimbus clouds early in the day, with more developing throughout the day can mean there's a greater chance of severe weather occurring soon.