BRONKHORST CEM W101A - 5 Troubleshooting and Service; Common Issues

Bronkhorst®
Instruction Manual Controlled Evaporator and Mixer 9.17.126A20
5
Troubleshooting and service
For a correct analysis of the proper operation of an instrument, it is recommended to disconnect the unit from the process
line and check it without applying fluid supply pressure. In case the unit is dirty or clogged, this can be ascertained
immediately by loosening the fittings and performing a visual inspection.
Energizing and de-energizing the instrument can indicate if there is an electronic failure. After energizing, control behaviour
can be checked by entering a temperature setpoint.
If you suspect leakage, do not disassemble the instrument for inspection, but contact your local distributor for service or
repairs.
5.1 Common issues
Symptom
Possible cause
Action
Vapour too dry
Carrier gas flow too high
Decrease carrier gas flow
Liquid flow too low
Increase liquid flow
Condensation at vapour outlet
CEM temperature setpoint too low
Increase CEM temperature setpoint
Carrier gas flow too low
Increase carrier gas flow
Liquid flow too high
Decrease liquid flow
CEM heater does not warm up
Fuse blown
Replace fuse
Temperature sensor defective
Return equipment to factory
Heater defective
Return equipment to factory
Vapour flow unstable
Pressure fluctuations on fluidic
inlets
Eliminate pressure fluctuations, e.g. by
installing a pressure regulator
CEM temperature setpoint (much)
too high
Decrease CEM temperature setpoint
CEM power too high
Use a CEM with a lower power consumption
Gas inclusion in tubing
· Flush liquid lines with processing liquid at
relatively high flow rate
· Bleed mixing valve
No communication between
instruments and readout/control
unit
No power supply
· Check power supply
· Check cable connection
· Check cable hook-up
Sensor failure
Return equipment to factory