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.
Cirrus clouds are a high-level cloud (above 20,000 ft.), and they are made of icy crystals. These wispy, delicate-looking clouds arrive in advance of frontal systems, so they indicate the weather is about to change.