Installation And Commissioning; Operation: Calibration Of The Electrode And Ph Transmitter; Maintenance - Mettler Toledo InPro 42 Serie Betriebsanleitung

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Installation and commissioning

1. While unpacking check the electrode for
mechanical damage. Please report any damage
immediately to your METTLER TOLEDO supplier.
2. Remove the protective cap and rinse the electrode
for a short time with deionized water. If the
electrode has already been used the sensitive part
can be cleaned with a soft toothbrush and a mild
soap solution, and then rinsed for a short time with
deionized water. After rinsing the electrode should
only be dabbed. Any rubbing of the pH sensitive
glass can increase the response time as a result
of electrostatic charge accumulation.
3. Check the space behind the pH sensitive glass
for air bubbles and remove any air bubbles that
may be present by shaking the electrode slightly
in a vertical direction.
4. Place the electrode into the housing as described
in the instructions for the housing.
5. Connect the electrode and the pH transmitter with
the corresponding cable (VP6, VP8, AK9). Observe
the connections scheme that accompanies
the cable or the transmitter.
6. Intelligent ISM
"Plug and Measure" and expanded diagnostics.
For installation, commissioning and operation of
the ISM system please refer to instructions for the
transmitter, module and cable.
5 Operation: Calibration of the electrode
and pH transmitter
Before a calibration immerse the electrode for
10 minutes in a pH 7.00 or pH 4.01 buffer solution
whilst connected it to the transmitter. A 2-point
calibration is recommended, e.g. pH 7.00 and pH
4.01 buffer solutions. For further details please consult
the operating instructions for the pH transmitter.
6

Maintenance

1. After each working cycle the electrode tip and
diaphragm have to be carefully rinsed with
deionized water. Any remaning of the solution
being measured on these parts must be avoided
at all costs!
2. If the electrode is not in use it has to be stored with
the electrode tip and the diaphragm immersed in
a tank of electrolyte (9823 / 3M KCl or Friscolyt™
9848).).
InPro 42XX (i) pH electrode
52 005 365
InPro 42XX (i) Series pH electrode
sensors such as InPro 426X i enable
®
© 04 / 16 Mettler-Toledo GmbH
Printed in Switzerland