Xylem WTW Alyza IQ PO4, Руководство по эксплуатации

Страница: 155 / 172

Alyza IQ PO4 What to do if ...
155
ba76201d03 05/2020
Implausible
measured values
Cause Remedy
Erroneous measurement Wait for another measurement
Calibration error  Repeat calibration
 Check the calibration standards
 Check the connection of the calibra-
tion standards
(for 1-point calibration the ChemBag
at connector S1 is always used.)
 Refill the tubes for the ChemBags
with standard solutions
Alyza menu / tab
Wartung
/
Manuelle
Funktionen
/ Befüllen (einzeln)
 Exchange calibration standards
 Increase the time between cleaning
and calibration.
Measured values always too
high after cleaning Activate the function
Konditionierung
(menu Einstellungen Sensoren/Dif-
ferenzsensoren /
Autom.Reinigung
).
After cleaning, a rinse is carried out for
each of the set number of steps and then
a rinse with the sample and the added
reagent.
Measuring cell of the photometer
unit dirty  Carry out a cleaning cycle
Alyza menu / tab
Wartung
/
Manuelle
Funktionen
/
Reinigen
 Contact the service department
Interferences
e.g. in sample matrix  Activate the function Untergr.-korr.
(opt) .
PLEASE NOTE:
For the optimized background correc-
tion, an extra tube and an extra
ChemBag have to be installed (see
section 5 Maintenance and cleaning,
 100).
 Select suitable measuring location
Photometer unit draws in air (e.g.
air bubbles in the sample tube)  Reduce the pump capacity of the fil-
tration pump (set to approx. 2 - 5 %).
 Check the screw couplings of the
tubes for tightness.