This page contains various descriptions of self-test failures along with article links that will help you to diagnose and resolve them.
Overview
The self-test is designed to test the functionality of each part of the ODME system. The test will check that the following parts are functional:
- Cell Communication
- Zener barrier module functionality
- Pressure transducer functionality
- Autoclean wiper functionality
- Measuring cell responsiveness
- System supply availability (Fresh water, Air pressure, electrical power supply - 1ph and 3ph).
The self-test will not check the following aspects of the system:
- Flow meter
- Measuring cell accuracy
- Pressure transducer accuracy
- GPS
At the end of your self-test, the results will be displayed on the display with OK beside each satisfactory components and ER beside each failed component.
Here is the complete list of results and what it means if they fail.
Measuring Cell ER
If this fails it means that the ODME computer module cannot communicate with the measuring cell over RS485. The communications line passes from the ODME measuring cell, via the Zener barrier module and VPC terminal box.
First step is to check your measuring cell is functioning. Here is how this is performed: Checking the communications of the measuring cell.
If the cell communicates after this check then the issue will be with either wiring, blown Zener barrier PCB or with a faulty Zener barrier PSU PCB. It is critical that you are certain your wiring is correctly terminated prior to proceeding. It is also important to check that the terminal box on your VPC (Next to the measuring cell) is watertight and in good condition. Please check against your Rivertrace drawings.
If the wiring is correct, the next step is to check the Zener barrier has not blown using this procedure: Checking the health of your Zener Barrier PCB.
If problems persist, please contact Rivertrace for further guidance.
Fresh water supply ER
If Fresh water ER is flagged then this indicates that the pressure did not increase during the "Checking pressures" stage of the self-test.
First steps are to ensure that the fresh water supply is available to the system and that the system drain valve is CLOSED at the VPC (This is a downwards facing valve at the inlet to the pump, typically open to atmosphere).
If fresh water is available and the system drain valve is closed, the following article can help in resolving the error: Pressure check issues during self-test.
This may also indicate a pressure transducer issue and more details on this fault can be found here: Pressure transducer fault finding.
If problems persist, please contact Rivertrace for further guidance.
Sample pump ER
If Sample Pump ER is flagged then this indicates that the pressure did not increase during the "Checking pressures" stage of the self-test when the pump is required to operate.
First steps are to ensure that the fresh water supply is available to the system and that the system drain valve is CLOSED at the VPC (This is a downwards facing valve at the inlet to the pump, typically open to atmosphere). You also need to ensure that 3-phase power is available to the motor control enclosure (Or air if you have a pneumatic motor).
If you have checked all of the above and still have Sample Pump ER, the following article can help in diagnosing the error: Pressure check issues during self-test.
This may also indicate a pressure transducer issue and more details on this fault can be found here: Pressure transducer fault finding.
If problems persist, please contact Rivertrace for further guidance.
Air Supply ER, Wiper ER and 1000ppm test ER
These three errors will also flag together as one movement from the wiper will check all three of these aspects of the system.
Detailed fault finding can be found here: Air, wiper and 1000ppm ER fault finding.
If problems persist, please contact Rivertrace for further guidance.