The quality, the ‘ efficiency and l’ reliability and performance of the plants depend on the state of the art instruments used for the detections, the monitoring and control of flow, pressure, level and temperature.
For maintenance and calibration of pneumatic instruments for measuring and regulating flow, pressure, level and temperature throughout Italy, rely on the specialized maintenance technicians.
Maintenance and calibration of pressure gauges, pressure gauges, pressure gauges and other pneumatic tools
Like all instruments for the measurement and control of parameters and values essential for the success of industrial processes, pressure gauges, pressure gauges (or maneuverometers), pressure switches and other pressure monitoring devices need to be checked periodically. , and sometimes recalibrated.
The data provided by the measuring instruments must be precise, unambiguous and reliable . Whenever a pressure gauge or other instrument for measuring and regulating pressure gives an indication that it differs from the norm, it is necessary to immediately remove the aforementioned pressure gauge to check it and, if necessary, recalibrate it. The correct operating conditions of the instrumentation are in fact an essential prerequisite to the overall safety of an industrial plant .
Pneumatic instruments are normally used for transmitting signals over distances of less than 150 m , due to the intrinsic limit of these instruments: the output signal is in fact constituted by an air pressure of value between 3 and 15 PSI ( Pound Square Inches), and the signal propagation time is unsuitable for covering longer distances.
In any case, since the systems generally make use of final pneumatic adjustment elements (such as the control valves), an electro-pneumatic transducer is required even if electronic instrumentation is used.
The instruments for regulating values such as flow rate, pressure, level and temperature were traditionally of the pneumatic type: local connectors used to connect the process and the regulation actuator valve, ie a mechanical process and a tire. Today, however, pneumatic regulators are increasingly being replaced by software regulators that receive data from a special transmitter and are able to generate a correction signal in the event of deviation from the set-point, or the variable of the preset value.
Another function typically entrusted to pneumatic instruments was the transmission of data relating to pressure, temperature, deformation , level, flow rate etc., converted into an electrical or pneumatic signal by a transducer, and sent to the system for reading, recording or automatic control of the detected quantities. Now more and more out of use, pneumatic transmitters are used when local regulators cannot come into direct contact with the process fluid and require an interface.
Maintenance and calibration of electronic instruments
Pneumatic tools make it possible to measure and adjust parameters essential to the proper functioning of industrial production processes. But in order to provide reliable measurements and performance at the highest levels, pneumatic-type measuring and control devices must undergo regular maintenance.
Maintenance and calibration of pneumatic instruments for measuring and regulating flow, pressure, level and temperature , are not only essential prerequisites for the proper functioning of the plants and the optimal success of the processes, but also operations foreseen and regulated by law.