How to fix no (fieldbus) communication on BRONKHORST Measuring Instruments?
If your BRONKHORST Measuring Instruments show no (fieldbus) communication, first check the power supply. If the power supply is working, check and change the node address. If the problem persists, reset the instrument and/or restart the master. If the issue still continues, contact Bronkhorst.
What to do if BRONKHORST Measuring Instruments have no output signal?
If your BRONKHORST Measuring Instruments have no output signal, first check the power supply. If the power supply is fine, then check if the control mode is valid. Also, verify that the control valve is not in a safe state. Ensure that the inlet pressure or differential pressure is not too low by increasing the inlet pressure. If the piping, filters, or control valve are clogged or blocked, flush the fluid system with clean, dry air. If the problem persists, contact Bronkhorst. If you suspect the laminar flow element or sensor has failed, return the equipment to the factory.
Why is the measured value lower than setpoint on BRONKHORST Measuring Instruments?
If the measured value or output signal of your BRONKHORST Measuring Instruments is much lower than the setpoint, first ensure that the inlet pressure or differential pressure is not too low; increase it if necessary. Check for process gas condensation by decreasing the inlet pressure or increasing the gas temperature. If the piping, filters, or control valve are clogged or blocked, flush the fluid system with clean, dry air. Finally, verify that the supplied fluid type matches the configured fluid type; if not, either supply the correct fluid or change the fluid type in the instrument configuration.
What to do if measured value never reaches setpoint on BRONKHORST Measuring Instruments?
If the measured value rises but never reaches the setpoint on your BRONKHORST Measuring Instruments, start by flushing the fluid system with clean, dry air to clear any blockages in the piping, filters, or control valve. If the problem persists, contact Bronkhorst. Increase the inlet pressure if it is too low. Check and decrease the outlet pressure if it is too high. Also, check the process outlet and downstream piping to ensure they are not blocked.
Why is control behavior unstable in BRONKHORST Measuring Instruments?
If the control behavior of your BRONKHORST Measuring Instruments is unstable, first check if the measurement is disturbed by vibrations and, if possible, avoid installation in close proximity to mechanical vibration. If the inlet pressure is unstable, install a pressure regulator or increase the buffer volume between controlling instruments. Ensure that the inlet and/or outlet pressure is neither too high nor too low, adjusting the pressure and/or setting the instrument pressure in accordance with the actual process pressure. Verify that the correct process gas is selected and that the controller settings are correct. If you suspect the control valve is damaged, return the equipment to the factory.
Why no flow when sending setpoint to BRONKHORST Measuring Instruments?
If there is no flow when sending a setpoint to your BRONKHORST Measuring Instruments, first check the upstream components for obstructions in the fluid lines, valves, and filters. Then, verify that the inlet pressure is within the specified bounds.
Why continuous maximum measured value on BRONKHORST Measuring Instruments?
If your BRONKHORST Measuring Instruments show a continuous maximum measured value or output signal, first check the inlet pressure. If the inlet pressure is too high, adjust it accordingly. Ensure the valve is not fully open; if it is, close it. If the issue persists, the sensor may have failed, requiring the equipment to be returned to the factory.
What to do if BRONKHORST Measuring Instruments indicate flow when there is none?
If your BRONKHORST Measuring Instruments indicate a flow when there is none, check the system for leakage, and follow vendor instructions when installing third-party components such as adapters, tubing, and valves.
General| Accuracy | ± 0.5% Rd plus ± 0.1% FS |
|---|---|
| Power Supply | 15...24 VDC |
| Communication Protocol | RS-232, DeviceNet, Profibus, EtherCAT, Modbus, FLOW-BUS |
| Operating Pressure | 10 bar |
| Material (wetted parts) | Stainless steel, Hastelloy |
| Output Signal | Analog (0...5 V, 0...10 V, 4...20 mA) |
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