BRONKHORST Mini CORI-FLOW MI Series, Инструкция по эксплуатации

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Bronkhorst®
Instruction Manual MI Series Industrial mini CORI-FLOW™ 9.17.120A 48
6.4 Common issues
Symptom Possible cause Action
No communication between
instruments and readout/control
unit
No power supply
·
Check power supply
·
Check cable connection
·
Check cable hook-up
Fuse blown Replace fuse
Sensor failure Return equipment to factory
Red LED glows continuously Slug flow (combined gas and
liquid flow)
Make sure the measuring tube only contains
either gas or liquid (see First use )
Hardware error Return equipment to factory
No (fieldbus) communication No power supply
·
Check power supply
·
Check cable connection
·
Check cable hook-up
Fuse blown Replace fuse
Invalid node address Change node address (see Network
configuration )
Other Reset instrument and/or restart master. If
problem persists, contact Bronkhorst.
No output signal No power supply
·
Check power supply
·
Check cable connection
·
Check cable hook-up
Fuse blown Replace fuse
Inlet pressure or differential
pressure too low
Increase inlet pressure
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
Sensor failure Return equipment to factory
·
Control behavior unstable
·
Red LED flashes irregularly
Measurement disturbed by
vibrations
·
If possible, avoid installation in close
proximity of mechanical vibration
·
Reduce sensitivity to vibrations by using a
mass block, shock absorbers, and flexible
tubing
Inlet pressure unstable Eliminate pressure fluctuations, e.g. by
installing a pressure regulator
Gas accumulation in tubing Flush the system to remove gas
Tip: use frequency or density signal to detect
presence of gas bubbles
Wrong controller settings Adjust settings (e.g. with FlowPlot)
Control valve damaged Return equipment to factory
No flow (sending a setpoint has no
effect)
No fluid supply Check upstream components for obstruction,
e.g.:
·
fluid lines
·
valves
·
filters