Trouble-shooting
Stamolys CA71CODcr
44
Hauser
9
Trouble-shooting
9.1
Trouble-shooting instructions
Although the analyser 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
Error message
Possible cause
Tests and / or corrective measures
Calibration failed
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.
Air bubbles in system
Start calibration manually (PARAMETER ENTRY, "1. calibration", change the date accordingly,
start measurement) or enter a new calibration factor.
Incorrect concentration of standard Check the concentration in the laboratory. Adjust the standard accordingly ("PARAMETER
ENTRY", "Calibration solution") or replace the standard.
Reagents contaminated or aged
Make sure that the reagent is not past its expiry date.
Standard dosing defective
Check the valves for contamination, obstructions (visual inspection). Replace valve hoses if
necessary.
Incorrect photometer
Check the setting in the CONFIGURATION menu.
Photometer is dirty
Not enough light intensity at
receiver
– Flush with 12.5% bleaching lye.
– When using a CAT430:
Check the filter.
Wrong optical cell
Incorrect photometer
Check the setting in the CONFIGURATION menu, "Photometer".
Sample collector empty
No sample
Establish sample transfer.
Level measurement defective
Check level measurement at the sample collector.
Spillage error
Leak at canisters or hoses
Replace defective components and clean and dry the analyzer or those components affected by the
leak.
No measuring signal
Photometer defective
Inform E+H Service
Electrical connection
Check all electrical connections.
Fuse defective
Replace fuse F4 or F5 (semi-delay 0.2 A)
Silver chloride precipitate
Because of a short stripping time or high salt contents (> 5 g/l) silver chloride precipitates in the
reactor and can affect the measurement. Increase the stripping time or dilute the sample. Ensure in
the case of dilution that the expected measured value is still in the measuring range.
Offset cal. failed
Incorrect concentration of standard Make sure that the standard is connected correctly.
Reagents contaminated or aged
Make sure that the reagent is not past its expiry date.
Empty tank!
The level monitoring system has
found that the maximum volume
level of the tank has been reached.
Replace the tank with an empty tank and in the MAINTENANCE menu, select "Yes" when the
prompt "Empty tank" appears. Make sure that the volume of the canister matches the volume set
under CONFIGURE "Tank capacity".
C-meas.range overflow
The COD of the sample is
unusually high.
Dilute the sample if the error occurs frequently.
C-meas.range underflow
The COD of the sample is
unusually low.
The device is not designed for this low measuring range.
