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If a flow meter is purchased from the manufacturer and there is no fluid in the pipeline, how should the zero point and range be adjusted during installation? This post was last edited by marry on 2009-4-1 19:23.]
If it is a smart transmitter, the zero point and range can be adjusted using a handheld operator.
Have the manufacturer adjusted both the zero point and the range?
No need to adjust it, right? The flow meter you bought is one that operates within the specified range
The flow meter cannot have its zero point adjusted when there is no flow; it must be at full flow level. As for the range, it doesn’t need to be adjusted since it’s already set at the factory.
Check whether HART protocol is supported
Before leaving the factory, the flow meter is already calibrated by the manufacturer; the user only needs to install it according to the installation instructions. If calibration is performed during major repairs, the measuring instruments used for measurement should be calibrated using standard measurement units; other types of flow meters can be calibrated according to their operating principles and the instructions provided
Instruments are calibrated or adjusted before being produced, with parameters such as the zero point and coefficients already set; ordinary users do not need to perform any adjustments. It is not recommended to set the zero point when the instrument is under air traffic control mode, as this may affect its proper operation; you can contact the manufacturer or refer to the relevant records on the instrument’s factory calibration certificate.
That type of flow meter? For rotors, vortex flow meters, orifice plates, electromagnetic devices, ultrasonic sensors, turbines, mass flow meters, etc., the installation and calibration methods vary; the key factors are the medium being used, the operating environment, required precision, and economic considerations. Your question is too general – only by providing more details can appropriate options be chosen.
Flowmeters are calibrated before leaving the factory; generally, the zero point does not require calibration, unless calibration is needed when the pipe is full. As for the range, it can be adjusted through the instrument’s control panel; if the instrument supports communication protocols such as Hart, Profibus, FF, etc., the range can be modified by communicating with the instrument
During production, the manufacturer determines the model of the instrument based on the process parameters you provide; it must pass a series of tests before it can be released for sale, with some of these tests requiring approval from **the relevant department. There should be no problems when there are no data errors; generally, tables require the use of standard protocols, so you don’t need to worry about this.
Except for orifice plates, which are flow meters that do not require calibration, manufacturers must calibrate all other flow meters before they leave the factory. There are usually no conditions for calibration during on-site commissioning. Large flowmeter manufacturers have a dedicated flowmeter calibration laboratory
The zero point is adjusted at the factory, and the range can be adjusted easily by oneself
The flow meter is calibrated before leaving the factory; this can be seen from the factory calibration certificate. No further adjustment is needed. If you really need to adjust it, find a frequency generator.
What type of flow meter is the poster using?
Orifice plates, nozzles, and velocity tubes are all available