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

InPro 6000 Series Optical O
6

Maintenance

h
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 r uptures.
• Before calibration always examine the Opto-
Cap optically for signs of damage. The OptoCap
must be intact and clean. Dirty surface should be
wip ed clean using a soft, moist tissue.
a
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 values
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 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
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 %.
© 01/ 2016 Mettler-Toledo GmbH InPro 6000 optical O
Printed in Switzerland
Sensors 12 mm
2
New OptoCap
Phi0 Phi100
60°± 2° 32°± 3°
60°± 2° 32°± 3°
68°± 3° 30°± 2°
82°± 3° 13°± 2°
), alternatively in a sample medium
2
Limit for old OptoCap
Phi0 Phi100
< 50° < 15°
< 50° < 15°
< 55° < 15°
< 65° >18°
sensors
2
52 206 256
25