Trouble-shooting
38
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 5-10 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 analyser inlet and check the concentration in the laboratory. If the analyser 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.
Analyser will not
switch on
No power
Check the electrical connection and ensure power supply.
Fuse
Replace fuse F1 (time-lag 0.5 A)
Analyser is running but
display reading is garbled
or off
Initialisation failed
Switch the analyser 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
Service
Measurement does not
start
Leak on photometer
Service
"Measurement" display
flashes
Time of 1st
measurement not
reached
The date must be between 01.01.1996 and the current date.
Interval not expired
Change parameters.
Calibration does not start
Time of 1st calibration
not reached
The date must be between 01.01.1996 and the current date.
Interval not expired or 0
h
Change parameters.
Leak on photometer
Service
Error
Possible cause
Tests and / or corrective measures
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