Alyza IQ PO4
Maintenance and cleaning
119
ba76201d03
05/2020
Terminating the
maintenance
routine
5.6
Cleaning the sample filtration and sample feed
5.6.1 Mechanical cleaning of the filter plate
The time when to clean the filter plate can be determined empirically based on
the negative pressure display on the filtration pump.
A pulsing negative pressure manometer suggests a normal operating condi-
tion of the filtration unit.
With a delivery height of approx. 2 m and a new filter plate, the negative pres-
sure is approx. -0.3 bar.
Every meter of delivery height increases the negative pressure by approx. -
0.1 bar.
If the negative pressure increases by a further -0.3 ... -0.4 bar with time, the
filter plate is covered with solid matter from the sample and has to be cleaned.
If, after the mechanical cleaning, there is still negative pressure, a chemical
cleaning is required, or the intake line may be blocked.
45
After maintenance activities at the measuring unit:
Close the front cover of the measuring unit and the doors of the
Alyza IQ.
46
Carry out the
Messung vorbereiten
function.
The temperature control of the Alyza IQ is started.
Wait for the temperature of the Alyza IQ to be regulated (display in the
tab
Status
)
.
47
Fill the tubes (Alyza menu / tab
Wartung
/
Manuelle Funktionen
/
Sys-
tem befüllen
or
Befüllen (einzeln)
)
48
Calibrate the measuring system with the new replacement parts
(Alyza menu / tab
Wartung
/
Manuelle Funktionen
/
Kalibrieren (2-
Punkt)
)
49
Carry out the
Alyza IQ STARTEN
function. Measurement is started and
the measured value is displayed in the measured value display after
approx. 5 ... 7 minutes.
50
Carry out the
Wartungszustand ausschalten
function.
Cleaning of the filter module, see the following documents:
Mounting instructions for the filter module (FM/PC)
Alyza IQ - short instructions for cleaning the filter membrane
module (included in the scope of delivery of the Alyza IQ )
Summary of Contents for WTW Alyza IQ PO4
Page 171: ......
