Polarization Function - Mettler Toledo InPro 6800 Bedienungsanleitung

Accessories O
2
2.2.2

Polarization function

As soon as a sensor is connected to the corresponding O
Master, the polarization function is automatically activated.
When the system is operated for the first time (or after a service) or
if the sensor has been disconnected from the voltage source (trans-
mitter or O
to be polarized prior to calibration by connecting it to the operating
O transmitter or to the O
2
is fully polarized and ready for operation.
A shorter polarization period is sufficient if the sensor has been dis-
connected for only a few minutes. The following table serves to es-
tablish the correct polarization time in relation to the depolarization
time. Please note that these are minimum polarization time. You can
let the sensor polarized for a longer period of time if you want to. This
way, you can always have one (or several) sensor ready in case you
need to replace a sensor in your process.
Depolarization time
30 >
15 >
1)
Depolarization time:
Time span in which the polarization voltage is cut off from the sen-
sor. This is the case during:
– change of electrolyte
– change of membrane body
– the time the cable is disconnected or no transmitter or O
sor-Master is connected to the cable
© 03/14 Mettler-Toledo AG, Greifensee
Printed in Switzerland
sensors
Sensor-Master) for longer than 5 minutes, the sensor has
2
t [Min.]
depol
t > 30
depol
t > 15
depol
t > 5
depol
t < 5
depol
Sensor-Master. After 6 hours, the sensor
2
1)
Minimum required
polarization time
2)
[Min.]
360
6 * t
depol
4 * t
depol
2 * t
depol
InPro 6800/6900/6950
52 200 952
9
Sensor-
2
Sen-
2