YSI P 700 IQ Analyzer - Manual (Page 91)

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P 700 IQ
Pre-cleaning 1 Prior to each chemical cleaning, pre-clean the membrane with
the special brush and rinse it with water. See section 5.4.5.1
Mechanical cleaning,  89.
Chemical cleaning 2 Dismount the filter module from the slide.
3 Completely submerse the filter module with the installed mem-
brane in the cleaning container filled with the membrane cleaner
• Start with a reaction time of 30 minutes.
• Watch the cleaning success and extend the reaction time as
necessary.
4 After the chemical cleaning, rinse the filter module with clean
water.
Restarting operation 5 Remount and secure the clean filter module on the slide.
6 Submerse the filtration unit in the basin or channel.
Techn. sodium hypo-
chlorite solution (13
% active chlorine) Add so much water
to 300 ml solution
that the volume is 5 l 5 l
Diluted hydrochloric
acid (pH=2)
WARNING
Dangerous chemical: Sodium hypochlorite (NaClO)
Sodium hypochlorite solution is corrosive and irritates
the eyes.
Heed the following rules:
• Note the identification marks on the label of the base
solution
• Read the sodium hypochlorite datasheet and follow
the safety instructions
• Wear protective equipment (lab coat, protective gog-
gles, chemical resistant protective gloves) and avoid
any contact with the chemical
Base solution
Preparation
instructions
Yield
Even membranes that are supposedly irreversibly blocked
may be restored by leaving them in the cleaning solution for
a longer period of time and then rinsing them several times.