As a kind of precise flow measuring instrument, electromagnetic flowmeter has been widely used in practical industrial production due to its good measuring effect on conductive liquid. However, in the daily flow metering, due to the existence of various factors, it is prone to failures such as unstable head, unstable display, fluctuation, and inaccuracy in use. In front of Xiao Xun introduced to everyone, the electromagnetic flowmeter common troubleshooting methods, then after the fault is detected, we should deal with it? Let Xiao Xun take everyone to sort out.

The head is not energized or yellow screen

1. Power off and restart;

2. The power supply removes other load devices and supplies power to the flowmeter separately;

3. Replace other flow meter heads on site to test whether the power supply is normal;

4. Replace the fuse;

5. After the above steps, the fault still exists, and you need to return to the factory for repair.

There is traffic passing, no traffic display

1. Check the "reverse output permission". If it is forbidden, change it to allow;

2. Check the empty pipe alarm threshold. If the actual value is greater than the threshold, increase the threshold;

3. Turn off small signal removal;

4. If the actual value of the empty tube alarm is too large and the medium is conductive, clean the surface of the electrode and measure the electrode path;

5. If the flow rate is too low, you need to reduce the diameter on site and replace the smaller diameter flowmeter.

The number is unstable, the number of turns

1. Non-metallic pipe, plus grounding ring;

2. Positive and negative turns, check the grounding path, if broken, reconnect on the flange grounding screw;

3, check SYS, if the excitation is not insulated or the excitation line is broken, try a single coil work, such as split, first check the junction box, the above steps can not be resolved, you need to return to the factory for repair;

4, the installation location is at the high point of zui, there are air bubbles in the pipeline, then the valve is added before and after the meter;

5. If the empty tube threshold is too high, the electrode needs to be cleaned.

Not allowed

1. What should I do if the 4-20mA output and the meter display are not correct?

(1) The current value output by the multimeter test meter head end is calculated correctly by (I-4)/16*Q/;

(2) Whether the upper limit of the range is consistent with the nameplate;

(3) Check the 4-20mA output line peripheral interference.

2. What should I do if the pulse output and the meter display are not correct?

(1) Check whether the pulse equivalent is consistent with the customer's design.

3, 485 can not do it?

(1) issuing a communication protocol;

(2) Check the mailing address in the header;

(3) Send special test software to customers.

no output

1, current, pulse, no output

Remove the load and connect it to the output with a multimeter to measure the current and voltage. If not, change the header. If there is, check the far line.

2, GPRS no communication

(1) Call next to the table to see if the phone has a signal;

(2) Check the historical data on the platform to determine whether the battery is dead;

(3) Check whether the header parameters are set correctly (IP address, GPRS connection mode, communication protocol, sleep wake-up, server port number).

When there is no traffic, there are

1. Add size signal to remove;

2. If it is determined that the pipeline medium is charged, it is necessary to add a metal grounding ring in front of the meter;

3. If the air traffic control alarm is not open, it will be opened;

4, there is a strong magnetic field around but can not be removed, set a metal box outside the meter.

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