Sensor-Master Inpro 6800/Inpro 6900/Inpro 6950; Product Description; Functions Of The O Sensor-Master; Why Do We Need To Polarize The Inpro 6800/6900/6950 Sensor - Mettler Toledo InPro 6800 Bedienungsanleitung

Accessories O
2
2 O Sensor-Master InPro 6800/6900/6950
2
Caution! Please note that the check functions described in
§ 2.2.3 can only be activated when a sensor is connected to
the sensor master.
2.1

Product description

2.1.1 Functions of the O
The O
connected sensor polarized and allows a rapid check of the sensor
functions before it is put in use.
2.1.2

Why do we need to polarize the InPro 6800/6900/6950 sensor?

The METTLER TOLEDO dissolved oxygen sensors are based on
Clark cell polarographic sensor. The Clark cell sensor is based on
an oxidation-reduction reaction. This reaction is not spontaneous.
It needs a polarization voltage which is delivered by the transmitter
or by the polarization module.
Polarization is for example necessary to stabilize the electrochemi-
cal reactions occurring at the anode and at the cathode. Without this
polarization stage, the electrode will be unstable and have a high drift
until the equilibrium is reached.
This type of sensor needs a polarization time to reach its equili-
brium state. The polarization module is used to polarize or to keep
a sensor polarized while it is not connected to a transmitter.
An electrode which is operated for the first time or which
has been disconnected for a service or for a period of time
longer than 5 minutes must be polarized before it can deliver stable
measurements.
© 03/14 Mettler-Toledo AG, Greifensee
Printed in Switzerland
sensors
Sensor-Master
2
Sensor-Master has basically 2 functions: it holds the
2
InPro 6800/6900/6950
52 200 952
7