Q1: What is a digital panel meter?
A1: The digital panel meter displays the voltage, current value or other standard signal transmission display value in the electrical circuit by digital direct reading; the product has the advantages of good stability, strong anti-interference, high cost performance, and the product is small in size and can be directly replaced original pointer meter.
Q2: What are the functions of digital panel meters?
A2: Digital panel meters can be categorized by type, size, style or other criteria. Understanding the functions of the digital panel meter is an important factor in choosing it. Commonly used functions are ammeters, voltmeters, frequency meters, power meters, energy meters, counters, timers, thermometers, process meters and controllers.
Q3: What are the advantages of digital panel meters?
A3: The digital panel meter directly displays the measured value or deviation value by digital quantity, which is clear and intuitive, easy to read, and will not produce parallax. Digital panel meters generally use large and medium-scale integrated circuits, with simple circuits, good reliability and good shock resistance. Because of the common modular design method for instruments, that is, digital panel meters are mostly composed of a small number of modular circuits with separated functions, so they are conducive to manufacturing, debugging and maintenance.
Tips: How to calibrate digital panel meter?
When a new system is used for the first time or when the digital panel meter is replaced, it must be calibrated before use. There are generally two calibration methods, one is physical calibration, and the other is digital calibration.
Physical calibration is available for most weighing systems, and digital calibration is used in areas where physical calibration is not possible. But digital calibration does not eliminate errors, and its accuracy is related to the sensitivity of the sensor, range and wiring system (four- or six-wire), cutoff or maximum range settings, and signal loss on junction boxes and cables.
Before calibration, the digital panel meter should be powered on for at least 15 minutes until the sensor and meter reach thermal equilibrium. The sensor cable and the connection cable between the junction box and the panel meter should be completely bound. In addition, the scale body should be pressed with a full-size object for more than 8 hours to stabilize the mechanical structure of the equipment. Otherwise, a few days after the new device was calibrated, the meter reading could suddenly change, resulting in inaccurate weighing.
Some digital panel meters have zero tracking function. The zero tracking function will not be automatically turned off during calibration, please turn off the digital panel meter manually, and then turn it on after the calibration is completed. During calibration, after the system is stable (the MD indicator light is off), press the OK key to accept the weighing value.