9. [SVF128] TROUBLESHOOTING AND REPAIR
9.1 Safety introduction
- Please do not open the cover on the flameproof enclosure if in an explosive environment.
- When trying to wire to HART or RS485 device, please make sure that the process of wiring the device into the loop complies with the intrinsic safety requirement. Or please process the wiring in a none-explosive environment.
- Please make sure the environment the flowmeter is in can meet the requirement of the certificate.
- When power is wired, please make sure the front and rear cover is closed properly.
9.2 Troubleshooting and repair
Symptom |
Reason |
Troubleshooting |
Repair |
|
No display |
Power supply failure |
Test the voltage on the power source with a universal meter |
Re-wire the power or use a new power |
|
Power is not wired |
Test the voltage on the power source with a universal meter |
Wire the power |
||
Cable if broken |
Check if there is a break-off point on the cable |
Check the cable and re-wire |
||
Wrong wiring |
Check if wiring to the correct terminal |
Re-wire |
||
The displayed flow rate is 0 while there is flow in the pipe |
Flow rate is lower than the meter's lower limit |
Increase the flow rate to check |
Increase the flow rate or replace a new proper flowmeter |
|
The flow rate of the small-signal cut off function is too high |
Check the small-signal cut-off setting |
Set the small-signal cut off to a proper value |
||
The energy threshold value is too high |
Check if the Energy threshold value is too high in spectrum analyzing checking mode |
Set the Energy threshold value to a proper value (Please refer to Note 1 for how to set it)
|
||
Transmitter function failure |
Replace the transmitter with another transmitter of the same type to check |
Replace the transmitter |
||
Sensor is damaged |
Increase the flow rate to check first then install the transmitter to another flowmeter in the same type to check. |
Replace the sensor |
||
Pipeline blocked or sensor jam. |
If all the above possibilities are eliminated, please check the pipeline and installation. |
Re-install the flowmeter |
||
There is a big difference between the flow reading and the process flow rate
|
No density compensation for steam measurement |
Check the density compensation devices and the setting |
Fix density compensation
|
|
The estimated flow rate before using the meter is wrong |
Use another flowmeter to confirm the actual flow rate |
|
||
Setting incorrect |
Check the settings of meter K factor, upper and lower limit of flow rate |
Set the meter correctly
|
Note 1: Enter code setting, set C49=12. Press “U-D button” to check the current energy of the vortex flow signal and vibration signal. E1 is the energy of the vortex flow signal, please set the energy threshold value lower than the displayed value. E.1 is the energy of vibration, please set the energy threshold value lower than the displayed value. Set above value in D017 (Energy threshold of vortex flow signal) and D018 (Energy threshold of vibration), then set C49 back to 00.
9.3 Self-diagnose function
SVF128 digital vortex flowmeter display can also indicate the self-diagnose code as below:
Error code |
Problem |
Repair |
Err-003 |
Temperature sensor disconnected |
Check Temperature sensor |
Err-004 |
Pressure sensor disconnected |
Check pressure sensor |
Err-005 |
About to over total flow |
This is a reminder message |
Err-006 |
Display value over the limit |
The value is over the physical limit of the display |
Err-011 |
Superheated steam temperature is over the limit |
Reduce the steam temperature |
Err-012 |
Superheated steam pressure is over the limit |
Reduce the steam pressure |
Err-013 |
The button is pressed and hold for too long time |
Check the button circuit |
Err-014 |
Reset code setting failed |
Check EEPROM |
Err-015 |
Reset digital setting failed |
Check EEPROM |
Err-016 |
Read total flow error |
Check EEPROM |
Err-017 |
The temperature calibration setting is wrong |
Check the record of temperature calibration |
Err-018 |
pressure calibration setting is wrong |
Check the record of pressure calibration |
Err-020 |
Flow rate limit setting is incorrect |
Check the flow rate limit setting |
Err-021 |
The temperature limit setting is incorrect |
Check the temperature limit setting |
Err-022 |
The pressure limit setting is incorrect |
Check the pressure limit setting |
Err-023 |
Communication connection error |
Check the communication li |
Err-024 |
The setting is incorrect when using aga_nx_19 to calculate the compressibility factor |
Check if the setting for compressibility factor is correct |
Err-025 |
Frequency output for total flow is over the limit |
Reset the total flow frequency output factor |
Err-026 |
3V power source failure |
Check the circuit board |
Err-027 |
Frequency output incorrect |
Check the range of frequency |
Err-028 |
The master is disconnected from the slave |
Check the cable wiring between local and remote transmitter |
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