Service; Cleaning; Service Indications; Electrolyte And Membrane Change - Mettler Toledo thornton Bedienungsanleitung

18

Service

Cleaning

Cleaning should not be necessary in the typical pure water
applications intended for this sensor. Any accumulation
of solids on the membrane surface or in the flow housing
should be washed off or cleaned briefly with an agent suit-
able for removing it. If physical cleaning is needed, use a
lint-free cloth or tissue very gently.
Warning: Use standard pre-cautionary measures in han-
dling any materials used for cleaning.

Service Indications

The electrolyte does not need to be changed frequently;
the electrolyte of the pureO
term measurement (6 months at 200 ppb ozone).
The membrane body and electrolyte should be replaced
once a year or if a visual inspection shows signs of
mechanical damage. They should also be replaced if the
sensor has a noticeable increasing or decreasing response,
indicated by a slope value trend shown over a number of
slope calibrations or if the sensor cannot be calibrated.
The interior sensor body or complete sensor should be
replaced if a visual inspection shows a crack in the glass
of the interior body or if the sensor shows leakage current.
(With electrolyte and membrane body removed and the in-
ternal body carefully dried there should be a zero reading.)
With sensor use, the anode (middle section of the interior
body) may develop various shades of green on its surface
which is normal and does not affect sensor performance.
Warning: Contact of electrolyte with mucous membrane
or eyes is to be avoided. Therefore wear gloves for disas-
sembly. If such contact occurs, rinse the affected area
well with water. Should adverse signs appear, get medi-
cal attention. Please see the electrolyte SDS for more
information.

Electrolyte and Membrane Change

Perform sensor disassembly only in a clean work area.
Refer to Figure 3 on page 23 for parts identification.
1. Unscrew the cap sleeve from the sensor shaft and
carefully pull it off the sensor.
2. If necessary, eject the membrane body from the cap
sleeve by pushing it from the end with a flat finger-
tip. (Before electrolyte is refilled, the membrane body
must be removed from the cap sleeve.)
pureO
3
Dissolved Ozone Sensor
pureO Dissolved Ozone Sensor
3
sensor is optimized for long
3
© 07 / 16 Mettler-Toledo GmbH
Printed in Switzerland