Flow meter

● Check that the temperature and pressure of the instrument are displayed properly ● Ask the customer about the inaccuracy and the basis for it; (for automatic control intermittent use the measurement will not be accurate) ● Whether the flow range used on site meets the requirements of the instrument, requesting a reference to the […]

485 communication cannot be connected The parameter confirmation function is selected for the 485 functions refers to the manual The default address of the instrument is 001, baud rate 9600, n without parity, 8 bits of data, 1 bit of stop Is the instrument wired correctly, connect 24V COM 485A 485B, battery power supply and

The current output is not normal (1) Three-wire current, current output abnormal ● Pay attention to the wiring: 24V, COM, IOUT, I+ (optional) Measure the voltage between IUOT and COM, if there is, there is current, use a multimeter to measure the current again, if not, the board is faulty. (2) Two-wire current wiring, the

Abnormal temperature display ● If the temperature display is abnormally high when the battery is powered, the battery is dead If the temperature display is below zero or much lower, the circuit board temperature chip is damaged, return the circuit board to the factory or send a replacement board. Use a multimeter to measure the

The flow meter displays fast ● Whether the customer has set the parameters ● If the installation is in accordance with the requirements ● Is it within the flow range ● Is the temperature and pressure display normal, if abnormal check steps refer to 5 or 6 If the meter is connected to an external

● Pulse mode and pulse equivalent can be modified in the parameters, refer to the manual for details ● Pulse equivalent active output, PNP, NPN, and OC hardware can be set at the rear terminal board, refer to the manual for details. ● Pulse equivalent active output, op-amp output, pay attention to the position of

No pulse output from the flow meter. ● Pulse mode and pulse equivalent can be modified in the parameters, refer to the manual for details. ● Active pulse output (PNP, NPN, OC hardware can be commissioned at the rear terminal block), refer to the manual for details. ● Measure the voltage between FOUT-C and COM

Fault point: Converter Test tool. Verification scheme. 1. Confirm if there is a pull-up resistor at the site 2. Whether there is the voltage at the pulse acquisition end 3. Check if the wiring is correct Test result: 1. 1. No pull-up resistor 2. No voltage 3. Wrong wiring Treatment solution: 1. 1. Pull up

Fault point: inaccurate flow Fault point: Converter Troubleshooting solution. Test the internal parameters of the meter head for the correctness Test result. Calibration coefficients have been modified Solution. Contact factory to check original coefficients

Fault point: Sensor Troubleshooting solution. Correct installation position Test result. The mounting position does not meet the requirements Treatment solution. Replace the mounting position (Appendix 5) Appendix 5 Flowmeter correct installation and precautions. The length of the straight pipe section is best for the flowmeter before ≥ 10DN, the back end ≥ 5DN, when the