Operation; Start-Up And Polarizing; Calibration; Maintenance - Mettler Toledo InPro 6000 Kurzanleitung

InPro 6000 Aperometric O
5

Operation

5.1

Start-up and polarizing

When the system is operated for the first time or if the sensor
has been disconnected from the voltage source (transmitter
or O sensor master) for longer than 5 minutes, the sensor
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has to be polarized prior to calibration by connecting it to the
operating O
the sensor will be fully polarized and ready for operation.
For polarizing and storage the cleaning and conditioning
solution (order Nr. 52 200 255) is recommended. This
solution contains an oxygen scavenger which ensures that
the electrolyte of the sensor does not come into contact with
oxygen when not in use.
h
Attention: The InPro 6950 i should never be polarized at air!
It is recommended to store the sensors in the according
electrolyte or cleaning and conditioning solution during the
polarization time. The InPro 6900 i and 6950 i use a special
electrolyte which contains an oxygen scavenger.
a
Warning: Setting of the polarization voltage on the
transmitter for correct measurements:
Standard applications: – 675 mV.
Measurements of continuously lowest oxygen concentrations
(< 500 ppb in liquids or < 10,000 ppm [vol.] in gases)
and In presence of volatile acidic components (e.g. carbon
dioxide during measurements in breweries): – 500 mV.
5.2

Calibration

With digital ISM sensors all calibration data are stored in the
sensor. Once filled with electrolyte and polarized they can be
connected to an ISM transmitter and immediately used for
measurement. Analog sensors are delivered wet and after
polarization can be slope 1-pt, 2pt- or process calibrated
using a transmitter.
With ISM sensors METTLER TOLEDO's calibration
and maintenance software tools iSense/iSense light
are recommended for sensor checking and calibration.
(www.mt.com/iSense).
Polarization voltage for calibration purposes are always put
to – 675 mV.
For measurements in carbon dioxide containing solutions
the transmitter setting has to be switched to – 500 mV
accordingly after the calibration.
6

Maintenance

If the membrane and / or the interior body exhibits signs of
failure (long response time, increased current in an oxygen-
free medium, mechanical damage, etc.) the membrane body
and / or the interior body has to be replaced.
The incorporated Intelligent Sensor Management (ISM)
technology monitors and reports the remaining lifetime of
the inner bodies as the Dynamic Lifetime Indicator.
Depending on the aggressiveness (CIP / SIP) of the application
conditions a replacement of electrolyte, the membrane body
or the interior body is recommended. This maintenance
can be performed by using the transmitter's calibration
menu and / or using METTLER TOLEDO's calibration and
maintenance tool iSense (www.mt.com/iSense).
For detailed maintenance description and criteria please refer
to iSense or the main sensor manual.
© 06 / 2019 Mettler-Toledo GmbH
30 313 395 B
Sensors
2
transmitter or to a sensor master. After 6 hours,
2
Amperometric Sensor Series
Printed in Switzerland
en
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