Endress+Hauser Stamolys CA71CL, Operating Instructions Manual

Page: 39 / 56

StamoLys CA 71 SI Trouble-shooting
Hauser 39
9.3 Process errors without messages
Error Possible cause Tests and / or corrective measures
Measured values
always the same
Reagents
contaminated or aged 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 .
No sample, no
reagents Make sure sample and reagents are supplied, check level monitor and clean if necessary
System blocked Flush with 12.5% bleaching lye (monthly maintenance)
Measured values
inaccurate
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 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.
Reagent blank value
too high After replacing the reagents, carry out an offset calibration and then a calibration
(CONFIGURATION, "Offset calibration")
Wrong dimension Check the setting in the CONFIGURATION menu, "Measuring unit".
Wrong optical cell Check the setting in the CONFIGURATION menu, "Photometer"
Sample suction time
too short Increase the suction time (CONFIGURATION, "Delay to sample")
Matrix effects
(substances that
interfere with the
photometric methods) Detect interfering substances (see Technical Information, "Measuring principle"),
possibly use sample conditioning
Standard is dosed to
the sample Check the valves and valve settings. Replace valve hoses if necessary.
Filter life too long 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.
System block or
contaminated Flush with 12.5% bleaching lye (monthly maintenance)
Dosing Replace pump hoses.
Optical cell dirty Flush with 12.5% bleaching lye first and then with 5% hydrochloric acid
Counter sample in the
laboratory delivers
deviating measured
values Sample ageing Shorten time between sampling and analysis.
Measured value
transfer errored
Wrong size of analog
output Check the setting (CONFIGURATION, "Analog output 1" " 2").
Incorrect measuring
range Adjust measuring range (PARAMETER ENTRY, "Measuring range")
Background noise Check line for interference from strong sources of induction.
Analyzer will not
switch on
No power Check the electrical connection and ensure power supply.
Fuse Replace fuse F1 (time-lag 0.5 A)
Analyzer is running
but display reading is
garbled or off Initialisation failed Switch the analyzer off and after approx. 30 seconds back on.
Pumps fail to run
Leak See "Spillage error" error message
Leak sensor
bypassed Interrupt contact between two leak sensors (pins 67-66)
Fuse Check all fuses and replace if necessary.
Pump defective E+H-Service
Measurement does
not start Leak on photometer E+H-Service