Flow meter common faults

Flowmeter using the malfunction, generally divided into process of measuring fault causes and flow meter itself device damage caused failure two kinds big,

Process causes the measurement fault

Is the most common is current body appear two phase flow phenomenon, specific to the measurement of liquid mainly measured liquid without full of pipe or measuring the upper agglomeration gas flowmeter measurement, or have a solid impurities into the measuring tube card master, fault alarm trigger flowmeter,

Processing method: through emissions change installation to ensure the current flow of uniflow, take measures to clean up the measuring tube of solid impurities,

Flow meter itself device damage caused by flow meter failures:

Using flow meter box is most common in water or loose wiring caused short circuit, signal loss such as fault,

Methods: in addition to strictly regulate the site installation, a detailed inspection maintenance, even daily to prevent processing is not timely cause more serious failure such as sensor coil burned,

Transmitter circuit board failure damage case of damage flowmeter:

The most common failure transmitter power board, output signal processing board case of damage,

Methods: in addition to strictly regulate cable signal wiring for lightning protection grounding measures, using separate regulated power supply to ensure the reliability of power supply, prevent burning device from the power supply voltage fluctuation significantly,

Split type flowmeter, due to the bad signal cable connecting pipe seal, water leakage caused to the sensor, burned drive coil.


The cause of the flowmeter is prone to failure

When the mass flowmeter problems should be how to find the reason?

Before using flow meter (1) to his good installation, this time will be according to the blackout specification to do it, if you can guarantee the standardization of the installation, will cause the flow meter of zero drift, so certainly cannot be measured, even if measured, then the data is also not to be able to use, when connecting flange welding does not produce the corresponding power signal, it also can cause interference in the use process, beside the sensor cable is best not to exist, then the magnetic flowmeter will team generated cable interference,

(2) the wiring problems, will also affect the normal operation of flowmeter, if the power cable when connecting to the error, will cause can't display, if the use of alternating current (ac), the current is not stable, easy to cause the fuse is damaged, it will work for measuring adverse impact,

(3) at the time of measurement, if it is found that the measured medium with air, so there will be a two phase flow phenomena occur, when the transmitter will give workers a warning notice, if the situation is more serious, the sensor will automatically stop all the work,

Flowmeter at the time of use if there are some faults, basically can be repaired, as long as before use to find out the reason for the easy to cause the meter fault, only know the reason, to take corresponding measures to suit the remedy to the case, to solve the problem of fault,