BRONKHORST ES-FLOW ES Series, Инструкция по эксплуатации

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Bronkhorst®
Instruction Manual ES-FLOW™ 9.17.145E 50
5
Troubleshooting and service
To track down problems in the fluid system, it is recommended to disconnect the unit from the process line and check it
without applying fluid pressure. Dirt or clogging might be detected quickly by loosening fluid connections and performing
a visual inspection.
Energizing and de-energizing the equipment can indicate whether there is an electronic failure. After energizing, control
behavior can be checked by applying fluid pressure.
If you suspect leakage, do not disassemble the device for inspection, but contact your Bronkhorst representative for service
or repairs.
5.1 Common issues
Symptom Possible cause Action
Red LED glows continuously, while
display shows irregular measure
readout
No liquid in measuring tube Fill fluid lines with process liquid before
starting measurement and control (see First
use )
Inlet pressure unstable (flow rate
pulsating)
Eliminate pressure fluctuations, e.g. by
installing a pressure regulator
Red LED glows continuously,
display shows no flow
Hardware error Contact your Bronkhorst representative
No (fieldbus) communication No power supply
·
Check power supply
·
Check cable connection
·
Check cable hook-up
Invalid node address Change node address (see Network
configuration )
Other Reset instrument and/or restart master. If
problem persists, contact your Bronkhorst
representative.
No output signal No power supply
·
Check power supply
·
Check cable connection
·
Check cable hook-up
Sensor failure Contact your Bronkhorst representative
·
Control behavior unstable
·
Red LED flickers or flashes
irregularly
Inlet pressure unstable (flow rate
pulsating)
Eliminate pressure fluctuations, e.g. by
installing a pressure regulator
Gas accumulation in tubing Flush the fluid system to remove gas
Wrong controller settings Adjust settings (e.g. with FlowPlot)
No flow (sending a setpoint has no
effect)
No fluid supply Check upstream components for obstruction,
e.g.:
·
fluid lines
·
valves
·
filters
Inlet pressure or differential
pressure out of bounds
Set inlet pressure to a value within
specifications
Flow rate or pressure rises, but
never reaches setpoint
Piping, filters and/or control valve
clogged or blocked
·
Clean system (flush with clean, dry air or a
non-aggressive cleaning liquid (e.g. ethanol
or isopropyl alcohol)
·
For external proportional control valves:
supply 0…15 Vdc and operational inlet
pressure to valve and slowly increase
voltage. If valve does not open, clean parts
and re-adjust valve
Inlet pressure too low Increase inlet pressure