![]() Power to active sensors is often provided by the recorder and is referred to as the excitation source. ![]() Require a power supply to generate a signal. Passive sensors, like thermocouples, do not require an outside power supply to generate a signal. Sensors can be either active or passive devices. (thermocouple, thermistor, RTD), strain gauge or bridge, current, humidity, level, pressure, pH, as well as many others. The data itself is produced by application specific sensors that attach to the recorder. ![]() Generally speaking, circular chart recorders simply render data. Many recorders can also record information in a digital format for download to a computer.Ĭircular chart recorders require the correct charts and pens to work correctly. CircularĬhart recorders are available in single or multichannel styles and in various configurations. The benefits of circular chart recorders includes the ease of operation, the hardcopy it produces, and real-timeĬommon applications for circular chart recorders include temperature and humidity measurements, flow rates, pH, pressure, as well as a host of other process measurements. Though some recorders can rotate over non-standard lengths of time. The charts usually rotate over standard time periods (e.g. While one or more pens plots the data radially in proportion to the signal received. Using data acquired by one or more sensors, circular chart recorders rotate uniformly Circular chart recorders archive data points on a round chart over a timed interval.
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