Rotary vortex gas flow meter use precautions

Project Overview

1. Pay attention to instrument selection. After the type of instrument has been selected (for example, intelligent precession vortex gas flow meter), the subsequent selection of instrument specifications and supporting components is crucial. In a word, only when you choose well can you use it well. For this reason, two basic principles should be grasped during the selection process; namely: first, to ensure accuracy of use, and second, to ensure production safety. To achieve this, three selection parameters must be implemented, namely the maximum, minimum and common instantaneous flow rates in the near and long term (mainly used for selecting the size and specification of the instrument), and the design pressure of the measured medium (mainly used for The nominal pressure level of the selected instrument), working pressure (mainly used to select the pressure level of the pressure sensor of the instrument).

2. Perform calibration before use. On the one hand, considering that there are still various difficulties in on-site verification of such instruments. In addition, if the purpose of purchase is to use this instrument in more important measurement situations, 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 watch 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 area for a system verification 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 many special requirements for process installation and use environment, any type of flow measurement instrument has such a common feature, that is, it is necessary to avoid vibration and high-temperature environment as much as possible to interfere with the flow state of components (such as compressors). , separator, pressure regulating valve, large and small heads, headers, elbows, etc.), 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, etc.

4. Strengthen post-management. Although this kind of instrument has a variety of automatic processing functions and micro-power consumption characteristics, it still needs to be strengthened after it is put into operation. For example, in order to ensure the long-term accuracy and reliability of the flow meter (to avoid unexpected outages and data loss), system calibration should be performed regularly (every 1 to 2 years), header data should be copied (daily or weekly), Change media parameters (monthly or quarterly) and check battery status, instrument coefficients and lead seals from time to time.

5. Pay attention to internal maintenance. If the measuring chamber and its components of the meter need to be regularly inspected or cleaned due to dirty air or other reasons, special attention must be paid to one thing: for precession vortex flowmeters of the same specification, the vortex generator, guide body, etc. The core components cannot be interchanged. Otherwise, the instrument measurement coefficient must be recalibrated and the temperature and pressure sensors equipped with it must be systematically calibrated.