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2 general steps to be taken, General steps to be taken -2 – YSI CarboVis 705 IQ TS User Manual

Page 40

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Maintenance and cleaning

CarboVis 70x IQ TS

5 - 2

ba75950e02

11/2012

5.2.2 General steps to be taken

Depending on the application site and the level of contamination of the

sensor as well as the coming job, the cleaning procedure includes the

following parts:

Every cleaning procedure starts with a basic cleaning. It removes

tough grime such as incrustation of fouling matter, algae and biolog-

ical deposits. If the sensor surface might be contaminated with

pathogenic germs it should also be disinfected.

Cleaning the measuring gap: Removal of lime deposits.

Cleaning the measuring gap: Removal of grease deposits.

Example 1

A heavily contaminated sensor from the inlet of a waste water treat-

ment plant, for which a

Sensor check

or

Zero adjustment

should be

carried out, must run through all cleaning steps properly. During the

cleaning process always keep all surfaces moist to prevent already

dissolved contamination and detergents from drying ("working wet-on-

wet"). Finally, thoroughly rinse off all remaining cleaning agents with

ultrapure water.

Example 2

If the sensor from example 1 should be cleaned on site during a routine

visual inspection and should then continue measuring, a basic cleaning

might possibly be sufficient.
The quoted examples and the following descriptions are intended to

give a general guideline. Due to the sensor's wide range of application,

the type and level of contamination can considerably vary. Therefore,

the cleaning procedure has to be individually composed. If necessary,

individual cleaning steps have to be changed or repeated several times

until the result meets the requirements.

This manual is related to the following products: