Ultrasonic flowmeter suddenly shows negative value
Sewage ultrasonic flowmeters are favored by many users because of their ability to measure without indirect contact with the medium. However, in the daily use of the process, some users encounter the ultrasonic flow meter display is negative, this is what is going on after all?
Ultrasonic flowmeter display is negative how to go?
Generally in the daily use of ultrasonic flow timing emergence flowmeter display negative scene, the important is the formation of the following reasons:
1, the ultrasonic flow meter can be installed in the card or the upstream and downstream probe installed in the reverse, Huayun instrument proposed new installation;
2, measuring the empty pipe or no overflowing pipe, there is gas. At this time, the flowmeter will display a negative number or the flow value fluctuates. It is proposed that the pipeline be filled with the measured medium, so that the flowmeter has measuring conditions;
3, can forget zero closed or table into the calibration situation, proposed to change from the setting dish or indirect reset;
4. There is a problem with the software of ultrasonic flowmeter. If the flow meter is not a bidirectional table, there is a table order disorder. It is proposed to find professional factory personnel to carry out training and repair.
The rest of the rare faults of ultrasonic flowmeters are:
1, boot no display. First of all, review whether the power supply properties and the additional value of the instrument should absolutely be, whether the fuse can be burned, if the above review is no problem, then it is proposed to send the instrument back to the original factory by professional and skilled personnel to review.
2, after starting the instrument only backlight, without any character display. After the instrument is turned on, there is only a backlight, and no other characters show this condition. It is generally a sequential chip loss, and it is proposed to send the instrument back to the original factory for processing.
3, when the flow value is shaken. The fluctuation of flow value in braking time is reflected in two aspects: the fluctuation of signal strength and the fluctuation of self-measured fluid. It is proposed to adjust the position of the probe, and improve the signal strength (maintain above 3%) to ensure that the signal strength is stable. If the fluid itself is shaken, the position is not good, it is proposed to select a new point to ensure the working condition requirements of the first 10D after 5D.
