KENNLINIE PT100 PDF

Ultimate precision temperature data logger Temperature measurement with 0. Standard sensors are are available from many manufacturers with various accuracy specifications and numerous packaging options to suit most applications. Unlike thermocouples, it is not necessary to use special cables to connect to the sensor. PT sensors The principle of operation is to measure the resistance of a platinum element.

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Ultimate precision temperature data logger Temperature measurement with 0. Standard sensors are are available from many manufacturers with various accuracy specifications and numerous packaging options to suit most applications.

Unlike thermocouples, it is not necessary to use special cables to connect to the sensor. PT sensors The principle of operation is to measure the resistance of a platinum element. For precision measurement, it is necessary to linearise the resistance to give an accurate temperature. The most recent definition of the relationship between resistance and temperature is International Temperature Standard 90 ITS For precision work, sensors have four wires- two to carry the sense current, and two to measure the voltage across the sensor element.

It is also possible to obtain three-wire sensors, although these operate on the not necessarily valid assumption that the resistance of each of the three wires is the same. If the sensor element is unable to dissipate this heat, it will report an artificially high temperature. This effect can be reduced by either using a large sensor element, or by making sure that it is in good thermal contact with its environment.

Using a 1 mA sense current will give a signal of only mV. Because the change in resistance for a degree celsius is very small, even a small error in the measurement of the voltage across the sensor will produce a large error in the temperature measurement.

Because of the low signal levels, it is important to keep any cables away from electric cables, motors, switchgear and other devices that may emit electrical noise. Using screened cable, with the screen grounded at one end, may help to reduce interference. When using long cables, it is necessary to check that the measuring equipment is capable of handling the resistance of the cables.

Most equipment can cope with up to ohms per core. Choosing PT sensors The type of probe and cable should be chosen carefully to suit the application. The main issues are the temperature range and exposure to fluids corrosive or conductive or metals.

Companies like Isotech can provide standards with 0. IEC also defines the colour coding for PRT sensor cables: the one or two wires attached to one end of the sensor are red, and the one or two wires at the other end are white.

Scroll Testimonials The kit B is of obvious quality, easy to setup and calibrate and the free to download software has a reasonable learning curve. Superb kit, superb support, what more can I say. Rop Honnor I have been using my PicoScope for years. I travel abroad so this has been ideal due to its physical size. Storage of waveforms on my Laptop is very easy allowing me to quickly email waveforms to my Colleagues.

This made my decision much easier when I was looking to buy an USB scope. Raul Trifan We have been using Picoscope D for quite some time, and are amazed by its accuracy and powerful emulations while working with numerous signal evaluations. Jeff Hulett It is a great scope. Customer service gave me first class service.

If I could give 6 stars for customer service - I would do so. Since the included software is really stable, this type of device is a great tool for great tasks! John D Samsing Great functionality in a compact size. I really like moving the mouse pointer to a position and having the Time and Voltage display the values at that point. Calibration equipment is a breeze with that feature. Don Horein.

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