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| | | BRONKHORST HIGH-TECH B.V. | | |
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| | | 5 Troubleshooting | | |
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| | | 5.1 General For a correct analysis of the proper operation of the MASS-VIEW® meter it is recommended to remove the unit from the process line and check it without applying gas supply pressure. In case the unit is dirty, this can be ascertained immediately by loosening the couplings. Furthermore check if the RJ-45 connector is fixed properly. Energizing or de-energizing of the instrument indicates whether there is an electronic failure. The OLED screen should light up. After that, fluid pressure is to be applied in order to check behaviour. If there is suspicion of leakage, do not check for bubbles with a leak detection liquid under the cover as this may lead to a short-circuit at the sensor or p.c.board. | | |
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| | | 5.2 Troubleshooting summary | | |
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| | | | | | | | | | | Symptom | Possible cause | Action | | | | No output signal, no display, no flow indication | No power supply | 1a) Check power supply | | | | PCB failure | 1b) Check cable(s) | | | | 1c) contact online: Mass Flow ONLINE* | | | | Valve blocked | 1d) contact online: Mass Flow ONLINE* | | | | Filter blocked | 1e) Clean filter | | | | Sensor failure | 1f) contact online: Mass Flow ONLINE* | | | | Maximum output signal, maximum flow indication | Flow too high | 2a) reduce the flow or re-range the instrument | | | | PCB failure | 2b) contact online: Mass Flow ONLINE* | | | | Sensor failure | 2c) contact online: Mass Flow ONLINE* | | | | High setpoint vs. output offset, flow indication lower than expected | Pressure not correct | 3a) Check pressure | | | | Blockage in line | 3b) Remove cause | | | | Valve blocked | 3c) contact online: Mass Flow ONLINE* | | | | PCB failure | 3d) contact online: Mass Flow ONLINE* | | | | Signal or flow indication lower than expected | System stoppage | 4a) Remove cause | | | | Flow is gradually decreasing or changing | (Gas) Condensation | 5a) Decrease supply pressure or increase temperature | | | | Pressure has changed | 5b) Check valve setting | | | | Small flow occurs when valve is supposed to be closed | Valve is leaking | 6) contact online: Mass Flow ONLINE* | | | | | | | | | | |
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| | | * For troubleshooting issues or returns, please go to http://www.massflow-online.com/ and click on service. Here you find the instructions on how to fix the problem (FAQ's) or how to return an instrument (RMA). 5.3 Service and repair | | |
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| | | MASS-VIEW® instruments can be repaired but not all the parts. What can be repaired can be found on the website of Mass Flow ONLINE (www. massflow-onl ine.com) | | |
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| | | 9.17.051 | | page 12 | | |
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