
Distillation Process Analyzer DPA-4.5
Faults
Fault
Possible cause
Troubleshooting
No ready signal /
measuring result for a
long time
Unsuitable parameter settings
Adjust the parameters
(see software handbook).
Signal cable connection to device has been
interrupted.
Rectify the cause of the fault.
Outputs with
measured values
assume unusual or
implausible values /
measuring result
repeatability or
reproducibility
worsens.
Fault in product conditioning (dirt, water or gas in
product, product temperature...)
Make sure that the product is
treated in accordance with the
technical data specifications.
The measured values for the fill level fluctuate
significantly.
Re-adjust the bubble gas
pressure regulator.
Alarm at digital alarm
output
PACS has issued an alarm.
Rectify the cause of the alarm.
Perform a reset (see software
handbook).
The device is switched off.
Switch on the device.
PACS is not running.
Start PACS (see software
handbook).
Insufficient or no
product flow (see
display on flow
controller).
−
Product supply line
: shut-off valve is closed,
primary pressure too low, leakage, product has
run out, filter is blocked
−
Analyzer
: product has run out, leakage
−
Drain
: blocked, shut-off valve closed
Rectify the cause of the fault
(e.g. blocked filter). Make sure
that the product is treated in
accordance with the technical
data specifications.
Product flow too great The flow controller is defective.
Replace product flow controller.
Distillation flask is not
filled / filled very
slowly with product
The metering pump is not working properly or is
defective.
Check the power connection.
Check/replace the metering
pump.
Distillation flask is not
heated / not heated
sufficiently
The fuse or ground fault circuit breaker of the
power supply have tripped.
Find and rectify the cause of
the fault
Distillation flask only
cools down very
slowly
The fan is defective
Replace fan.
No cold product is flowing through the distillation
flask:
Insufficient or no product flow in the product supply
line.
Draining the sample is impossible.
See above
See below
The sample is not
The outlet filter is blocked.
Clean the outlet filter
December 2013
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