LXM/MIN0

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LXM/MINO Digital Panel Meters - Accessories Application Field and Working Principle

LXM/MINO digital panel meters are micro-processor based devices that perform a wide variety of functions. They are used in multiple application fields - from measuring temperature and pressure in industrial processes to displaying the readings of a sensor or measuring the angle in robotics. With a wide variety of digital panel meters, measuring a range of values and parameters is easy and accurate.

Types of Digital Panel Meters

Digital panel meters come in three basic types: Programmable, Open-Loop, and Loop-Powered. Programmable digital panel meters are used when a variety of inputs need to be measured for a variety of applications. The programming allows the digital panel meter to be adjusted to the current application. The Open-Loop digital panel meter does not require programming, but typically has a limited range of inputs. This type of digital panel meter is mainly used in laboratory settings, due to its more limited range of application. The Loop-Powered digital panel meter is typically used in industrial settings, as it is able to measure a wide range of inputs and collect data very quickly.

Inputs for Digital Panel Meters

The input types that digital panel meters can be connected to are extensive. The input type affects the results that the digital panel meter provides. Digital panel meters can be connected to current, thermocouples, RTD temperature sensors, isolated thermistors, process voltage, AC and DC voltage, frequency, speed and position, and PLC’s. Depending on the model of digital panel meter, different numbers of inputs are available and the accuracy of the results can vary.

Gauge Functions for Digital Panel Meters

In addition to measuring the inputs, digital panel meters can also inputs onto a scale or gauge. This is useful for when a visual representation of an input is needed. Other gauge functions available include a bargraph, programmable ratio, M-Bus interface and process display. The bargraph indicates the change in specific input values; the ratio figure is calculated from a ratio of different inputs; and the process display clearly provides a description of the process.

Digital Panel Meter Working Principle

Digital panel meters are based on the principles of micro-processing and digital signal processing. The inputs that are connected to the digital panel meter are first conditioned and then digitized. After the signal is digitized, a microcontroller processes the input signal. The processed signal is then converted back into analog format and applied to the display. Depending on the model, the inputs can either be passive or active, and the outputs can be either analog or digital.

Conclusion

Digital panel meters are extremely versatile devices – used in a wide variety of industrial, engineering and science applications. They are extremely accurate and can measure a wide range of inputs. Depending on the model, they can provide a range of gauge functions as well. By understanding the inputs, functions, and working principle, digital panel meters can be used effectively in any application.

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