Environment and Parameter Check
Confirm if the power supply works fine.
Confirm whether the confirmation page data is consistent with the communication data.
Confirm that the OCT function is enabled and defined correctly (parameter ), if E02 uses pulse v2.
Confirm that the OCT preset state is on "NC" or off "NO" (parameter ).
Confirm that the circuit wiring is correct, the external power supply connection and power supply work fine, the unused wiring is insulated, and there is no magnetic field interference in the surrounding area.
Hardware, Wiring, and Program of the Receiver Check
Enter parameter , you can set the number of pulse output per second, please confirm at the receiving end whether you have received the corresponding data, especially whether the number is normal.
Please confirm that the parameter (Pulse width) is greater than or equal to the minimum pulse duration requirement of the receiving device.
Please confirm that the value and unit of E14 (Pulse unit) are the same as those required by the receiver program. For details, please refer to the description of the parameter table.
Results and Actions
The OCT output is normal, and the receiving end equipment and program are also normal. If the data is still abnormal, confirm other causes of the abnormality (pipe size, flow rate).
The main unit of this device may be damaged. If you have other units at hand, you can conduct a cross test to confirm that the receiving device, data processing program or line are all normal.
Record the serial number of the fuselage, the wiring diagram (all flowmeter-related wiring) and the model brand of the receiving end, and contact the original factory.
Environment and Parameter Check
To confirm if the power supply works fine.
To confirm if the data on the LED screen is transferred to the system.
To confirm if the Iout function is still on. (Parameter
Enter the parameter F04 to test the receiving end. In the setting screen, if you set open, it will not conduct, and if you set conduct, it will conduct.
Use the current gear of the three-purpose ammeter to connect between OCT+ and the positive pole of the power supply, and confirm whether there is current flowing when C0=1. Or use the voltage range to confirm whether there is a voltage difference close to the power supply voltage between OCT+ and OCT- when S0=1. If it is found that there is no correct output for the first time, please reconfirm the power supply circuit.
To confirm if the low point value is 0 or 4mA. (Parameter E13)
To confirm the setting of the corresponding value range. (Parameter E07 E08)
To confirm if wire wiring is correct and the insulation of unused wires is finished.
Hardware, Wiring, and Program of the Receiver Check
To get into parameter E11 to check if the 4/0mA export and interpretation function of the receiver (If there is a difference between data to data, users could adjust it by the unit uA at this page) works fine.
To get into parameter E12 to check if the 20mA export and interpretation function of the receiver works fine. (If there is a difference between data to data, users could adjust it by the unit uA at this page.)
To confirm if the interpretation function of the receiver works fine under simulation mode when testing different data. Simulation mode must be switched off when testing is finished. (Users can switch on the simulation mode by parameter F02 too, and adjust the simulated data by parameter F01. Back to the main page while finishing data adjustment.)
If the wiring during the above test is different from the actual operation, please re-test.
Confirmation of the Output Status of the Device
Separating the Iout wiring from the system, then using the multimeter MA stalls to confirm if the current export works fine.
Results and Actions
If the data is still abnormal even when both the Iout export function and the equipment and program of the receiver is working fine, some other possible reasons, like pipe size, or flow rate, should be checked further.
The current device may be damaged possibly. If users have another device for cross testing, please make sure that the receiving equipment, data processing program, or wiring is working fine.
Contact the original manufacturer with the serial number, wiring diagram (all related wiring of the flowmeter), and the model and brand of receiver.
Contact the original manufacturer with the serial number, wiring diagram (all related wiring of the flowmeter), and the model and brand of receiver.
Environment and Parameter Check
Confirm that the device power supply is normal.
Confirm whether the confirmation page data is consistent with the communication data.
Confirm that the OCT function is enabled and defined correctly (parameter ). If E02 uses pulse v2, please confirm the OCT Pulse troubleshooting process.
Confirm that the OCT preset state is on "NC" or off "NO" (parameter ).
Confirm that the relevant parameter settings of Alarm A, B, and C meet the requirements.
Confirm that the circuit wiring is correct, the external power supply connection and power supply are normal, the unused wiring is insulated, and there is no magnetic field interference in the surrounding area.
Hardware, Wiring, and Program of the Receiver Check
Enter the parameter to test the receiver. In the setting screen, if you set it open, it will not conduct, but if you set conduct, it will conduct.
Use the current gear of the three-purpose ammeter to connect between OCT+ and the positive pole of the power supply, and confirm whether there is current flowing when C0=1. Or use the voltage range to confirm whether there is a voltage difference close to the power supply voltage between OCT+ and OCT- when S0=1. If it is found that there is no correct output for the first time, please reconfirm the power supply circuit.
Results and Actions
The OCT output is normal, and the receiving end equipment and program are also normal. If the data is still abnormal, confirm other causes of the abnormality (pipe size, flow rate).
The main unit of this device unit may be damaged. If you have other units at hand, you can conduct a cross test to confirm that the receiving device, data processing program or line are all normal.
Record the serial number of the fuselage, the wiring diagram (all flowmeter-related wiring) and the model brand of the receiving end, and contact the original factory.
Environment and Parameter Check
Confirm that the device power supply is normal.
Confirm whether the confirmation page data is consistent with the communication data.
Confirm that the RS485 function is enabled, the ID and Baud are defined correctly (parameters E04 E05).
Confirm that the advanced parameters are set correctly (parameters E15 E16 E17).
All unused wires are insulated, and there is no magnetic field interference in the surrounding area.
Hardware, Wiring, and Program of the Receiver Check
Confirm whether the RS485 command is used correctly.
Only one flowmeter is connected to the line, whether it can communicate normally.
Make sure the RS485 wiring is using the series connection method and not the star connection method.
In the case of multiple devices, is there any phenomenon that the power supply and ground wire of some devices are different, resulting in ground looping and potential fluctuation?
Does the line meet the requirements for twisted wire, thickness, series connection, and short fork?
For longer lines, do you use terminating resistors at both ends of the circuit?
For scenarios with large external interference, is a bias circuit used?
If there are multiple devices on the line, have you confirmed that the Baud of each device is the same and the ID is different?
Use an oscilloscope to see if the noise between the RS485 +/- lines is too high? (>200 mVpp generally considered too large)
Use a computer or a similar platform with high development flexibility to connect to a single flowmeter, first confirm that all communication settings and commands can communicate normally. Then modify the controller program.
Results and Actions
The RS485 output is normal, and the receiver equipment and programs are also normal. If the data is still abnormal, confirm other abnormal causes (pipe size, flow rate).
The main unit of this device may be damaged. If you have other units at hand, you can conduct a cross test to confirm that the receiving device, data processing program or line are all normal.
Please contact the original factory after recording the serial number of the fuselage, the wiring diagram (all flowmeter-related wiring) and the model brand of the receiving end.
If the line or environment cannot be improved, please allow the program to allow more re-communication attempts.
Device exception
Contact the original factory or agent.
Analog current signal unable to output
Abnormal wiring
Please make sure if the cable connection is correct or not.
The function is not turned on
Please go to parameter to turn on the function.
Abnormal output value of analog current signa
Output value needs to be fine tuned
Please adjust output current value by set-up parameters .
Excessive Line and measuring resistance
Please confirm if total loop resistance exceeds usage limit, and if it is replaceable.
Please increase external supply voltage, proper external supply voltage will increase usage limit of total loop resistance.
Wrong output parameter set-up
Please confirm the correction of set-up parameter .
RS485 Unable to receive response
Communication parameter set-up mismatch
Please confirm the correction of set-up parameter .
Address conflict
Please confirm that there is only one piece of equipment at a specified address.
RS485 signal is unstable
Poor wiring
Please refer to to confirm if the wiring is correct.
Other abnormalities
Please use parameter to return to the factory parameters.
Issues
Possible Causes
Solutions
Persistent shut-down problems
Unstable power supply
Please confirm if supply voltage and current is within the range.
Device exception
Contact the original factory or agent.
Messages Information
Possible Causes
Solution
Abnormal communication of ultrasonic components
Too much noise in the power system causes component abnormalities
Replace the power supply.
Verify that the power cord is not overwound.
Are the wires too close to high-noise electromechanical equipment such as motors and power lines?