1. How to choose the right pressure transmitter or level meter?
Considerations include measurement range, medium type (temperature, viscosity, corrosivity), process pressure, accuracy requirements, output signal (4-20mA, HART, Modbus), connection type, and protection level (IP/NEMA).
2. What is the typical accuracy of these instruments?
Accuracy varies by model and calibration, typically ranging from ± 0.1%FS to ± 0.075%FS. Please refer to the specific product technical specifications for exact data.
3. What are the key installation points for level gauges?
Pay attention to the installation position to avoid feed ports, agitators, or obstacles. Ensure proper sealing, meet blind zone requirements for non-contact types, and correctly set tank parameters like density.
4. How is zero point or range calibration performed?
Most devices support local calibration via LCD buttons or remote calibration via HART/Fieldbus controllers. Range calibration usually requires a standard pressure source or a simulated reference point.
5. Which communication protocols are supported?
Commonly supported protocols include HART (superimposed on 4-20mA), Profibus PA, and Modbus RTU/TCP. Support varies by specific model.
6. Does the equipment require regular maintenance?
Yes. Regular inspections of appearance, seals, diaphragms, and electrical connections are recommended. The maintenance cycle depends on the severity of the application environment.