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Trouble-shooting
Error message
Possible cause
Reagents
contaminated or aged
Measured values
No sample, no
always the same
reagents
System blocked
Incorrect
concentration of
standard
Reagents
contaminated or aged
Reagent blank value
too high
Wrong dimension
Wrong optical cell
Sample suction time
too short
Measured values
Matrix effects
inaccurate
(substances that
interfere with the
photometric methods)
Standard is dosed to
the sample
Filter life too long
System block or
contaminated
Dosing
Optical cell dirty
Counter sample in the
Sample ageing
laboratory delivers
deviating measured
values
Wrong size of analog
output
Measured value
Incorrect measuring
transfer errored
range
Background noise
No power
Analyzer will not
switch on
Fuse
Analyzer is running
Initialisation failed
but display reading is
garbled or off
Leak
Leak sensor
bypassed
Pumps fail to run
Fuse
Pump defective
Measurement does
Leak on photometer
not start
38
9.3
Process errors without messages
Tests and / or corrective measures
Simple check: Add about 20 ml of standard solution with about 1 ml of reagent in a vessel. If it
does not change colour after max. 10 min, replace the reagents .
Make sure sample and reagents are supplied, check level monitor and clean if necessary
Flush with 12.5% bleaching lye (monthly maintenance)
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 vessel. If it
does not change colour after max. 10 min, replace the reagents.
After replacing the reagents, carry out an offset calibration and then a calibration
(CONFIGURATION, "Offset calibration")
Check the setting in the CONFIGURATION menu, "Measuring unit".
Check the setting in the CONFIGURATION menu, "Photometer"
Increase the suction time (CONFIGURATION, "Delay to sample")
Detect interfering substances (see Technical Information, "Measuring principle"),
possibly use sample conditioning
Check the valves and valve settings. Replace valve hoses if necessary.
Take counter sample at analyzer inlet and check the concentration in the laboratory. If the
analyzer measured values have no deviations, clean ultrafiltration modules or backflush filters
more frequently.
Flush with 12.5% bleaching lye (monthly maintenance)
Replace pump hoses.
Flush with 12.5% bleaching lye first and then with 5% hydrochloric acid
Shorten time between sampling and analysis.
Check the setting (CONFIGURATION, "Analog output 1" " 2").
Adjust measuring range (PARAMETER ENTRY, "Measuring range")
Check line for interference from strong sources of induction.
Check the electrical connection and ensure power supply.
Replace fuse F1 (time-lag 0.5 A)
Switch the analyzer off and after approx. 30 seconds back on.
See "Spillage error" error message
Interrupt contact between two leak sensors (pins 67-66)
Check all fuses and replace if necessary.
E+H-Service
E+H-Service
StamoLys CA 71 PH
Endress+Hauser
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