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Trouble-shooting
Error message
Possible cause
Air bubbles in system
Incorrect concentration of
Calibration failed
standard
Reagents contaminated or
aged
Standard dosing defective
Wrong optical cell
Optical cell dirty
Not enough light intensity sent
to receiver, e.g. due to
sedimented particles
Wrong optical cell
Wrong optical cell
No sample
No sample
Level measurement defective
Leak at canisters or hoses
Spillage error
Photometer defective
No measuring signal
Electrical connection
Fuse defective
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9
Trouble-shooting
9.1
Trouble-shooting instructions
Although the analyzer is not very prone to faults due to its simple assembly, problems
can, of course, not be completely ruled out.
Possible errors, their causes and their possible remedies are listed below.
9.2
System error messages
Tests and / or corrective measures
If a calibration fails, you can enter a new calibration factor manually (CONFIGURATION
menu, "Calibration factor"). Cancel the error message by switching the analyzer off and
on briefly.
If the error occurs frequently, you will have to search for the cause.
Start calibration manually (PARAMETER ENTRY, "1st calibration", change the date
accordingly, start measurement) or enter a new calibration factor.
Check the concentration in the laboratory. Adjust the standard accordingly
(PARAMETER ENTRY, "Calibration solution") or replace the standard.
Simple check: Add about 20 ml of standard solution with about 1 ml of reagent in a
beaker. If it does not change colour after max. 10 min, replace the reagents.
Check the valves for contamination, obstructions (visual inspection). Replace valve
hoses if neccessary.
Check the setting in the CONFIGURATION menu.
– Flush with 12.5% bleaching lye
– When using a CAT 430:
Check the filter.
Check the setting in the CONFIGURATION menu, "Photometer".
Establish sample transfer.
Check level measurement on sample collector.
Replace defective components and clean and dry the CA 70 or those components
affected by the leak.
Inform E+H Service
Check all electrical connections.
Replace fuse F4 or F5 (medium time-lag 0.2 A)
StamoLys CA 71 AM
Endress+Hauser
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