BRONKHORST MASS-VIEW series, Инструкция по эксплуатации

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BRONKHORST®
9.17.051 MASS-VIEW® series Page 21
5 Troubleshooting
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 PC-board.
5.2 Troubleshooting summary
Symptom Possible cause Action
No output signal, no display, no flow indication No power supply 1a) Check power supply
1b) Check cable(s)
PCB failure 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*
For troubleshooting issues or returns, please go to www.massflow-online.com and click on service.
Here you find the instructions how to fix the problem (FAQ’s) or how to return an instrument (RMA).
5.3 Service and repair
MASS-VIEW
®
instruments can be repaired but not all the parts . Parts that can be repaired can be
found on the website of Mass Flow ONLINE ( www.massflow-online.com )