Maintenance; Sensor Inspection; Visual Inspection; Testing The Sensor With The Transmitter - Mettler Toledo InPro 6000 Bedienungsanleitung

InPro 6000 Series Optical O
6

Maintenance

Note: All maintenance work can be done without any
tools.
6.1

Sensor inspection

6.1.1 Visual inspection

To check your sensor, we recommend the following
procedure:
• The contacts of the connector must be dry. Moisture,
corrosion and dirt in the connector can lead to false
readings.
• Check the cable for buckling, brittle areas or ruptures.
• Before calibration always examine the OptoCap
optically for signs of damage. The OptoCap must
be intact and clean. Dirty surface should be
wip ed clean using a soft, moist tissue.
Attention! Do not use any cleaning agents contai ning
alcohol or any solvents. This could damage the sen-
sor.

6.1.2 Testing the sensor with the transmitter

If the measured values differ from the expected value,
a air calibration should be performed.
Appropriate phase values after a correct calibration:
Depending on the age of the OptoCap the phase val-
ues typically decrease over time compared with a new
OptoCap (see table). Note that for the InPro 6970 i the
phase at air increases.
Sensor type
InPro 6860 i
InPro 6870 i
InPro 6880 i
InPro 6960 i
InPro 6970 i
The OptoCap needs to be replaced if the phase values
exceed the limits.
The phase values of the sensor are stored in the cali-
bration history. The actual phase value can be checked
in the "Calibration – Verify" menu or with iSense.
If after such procedures the above mentioned values are
still not reached, replace the OptoCap. If this doesn't
solve the problem too send the sensor to your local
METTLER TOLEDO representative for inspection.
Zero oxygen measurement can be done by using
CO or nitrogen (N
2
um saturated with one of these gases.
After 2 minutes in an oxygen-free sample medium, the
reading on the transmitter should drop to below 5 % of
the reading in ambient air, and within 10 minutes the
value should have dropped to below 1%.
© 07 / 12 Mettler-Toledo AG
Printed in Switzerland
Sensors 12 mm
2
New OptoCap
Phi0 Phi100
60°± 2° 32°± 3°
60°± 2° 32°± 3°
60°± 2° 32°± 3°
68°± 3° 30°± 2°
82°± 3° 13°± 2°
), alternatively in a sample medi-
2
InPro 6000 optical O
Limit for old OptoCap
Phi0 Phi100
< 50° < 15°
< 50° < 15°
< 50° < 15°
< 55° < 15°
< 65° >18°
sensors
2
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