Instructions for use of intelligent vortex gas flowmeter

Any type of metering instrument has its particularity, and the intelligent vortex gas flowmeter is no exception. In order to make this type of gas flowmeter better serve the flow measurement work, the technical personnel from Jiangsu Huaian Zhongkong Automation Instrument Co., Ltd. have many years of field practice experience and show that the following precautions should be given sufficient attention by the relevant management and use departments.

1. Pay attention to the instrument selection. After the instrument type has been selected (for example, intelligent vortex gas flowmeter), it is crucial to select the instrument specifications and supporting components. In a word, good selection can be used well. To this end, two basic principles should be grasped in the selection process: one is to ensure the accuracy of use, and the other is to ensure production safety. To achieve this, three selection parameters must be implemented, namely the maximum, minimum and commonly used instantaneous flow rates in the short and long term (mainly used to select the size of the instrument), the design pressure of the measured medium (mainly used to select the nominal pressure level of the instrument), and the working pressure (mainly used to select the pressure level of the instrument pressure sensor).

2. Calibrate before use. On the one hand, considering that there are still various difficulties in the on-site calibration of such instruments. In addition, if the intention of purchasing is to use this instrument in more important measurement occasions, such as large-flow trade measurement or measurement points with prominent measurement disputes, and the application site does not have the conditions for online flow calibration, then in this case, it is too early to easily judge that all the performance of the meter is qualified based on a factory certificate provided by the manufacturer at the time of purchase. Therefore, in order to ensure the reliability and accuracy of the measurement results of the instrument in the future work process, it is necessary to send it to a department with verification capabilities and qualifications in this regard for a system calibration within the full flow range before formal installation.

3. Do a good job in process installation. Although this type of flow meter does not have too many special requirements for process installation and use environment, any type of flow measurement instrument has such a commonality, that is, to avoid vibration and high temperature environment and flow interference elements (such as compressors, separators, pressure regulating valves, reducers and manifolds, elbows, etc.) as much as possible, keep the inner wall of the straight pipe section before and after the instrument smooth and straight, and ensure that the measured medium is a clean single-phase fluid.

4. Strengthen post-management. Although this type of meter has multiple automatic disposal functions and low power consumption, it still needs to be managed after it is put into operation. For example, in order to ensure the accuracy and reliability of the flow meter in the long term (to avoid unexpected downtime and data loss), it is necessary to regularly calibrate the system (every 1 to 2 years), copy the header data (daily or weekly), replace the medium parameters (monthly or quarterly), and check the battery status, meter coefficients and lead seals from time to time.

5. Pay attention to internal maintenance. If the measuring cavity and its components of the instrument need to be regularly inspected or cleaned due to dirty gas or other reasons, then one thing must be paid special attention to: for vortex flowmeters of the same specification, the vortex generator, guide body and other core components cannot be interchanged, otherwise, the metering coefficient of the instrument must be recalibrated and the temperature and pressure sensors it carries must be systematically calibrated.