Maintenance; Inspection; 6.1.1 Visual Inspection; Checking Wiring And Transmitter With The Ph Simulator - Mettler Toledo InPro 5000 Bedienungsanleitung

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6

Maintenance

6.1

Inspection

6.1.1 Visual inspection

To check the sensor, we recommend the following pro-
cedure:
• The contacts of the VP connector must be dry.
Moisture, corrosion and dirt can lead to false read-
ings.
• Check the cable for kinks, brittle areas or tears.
• Examine the membrane foil optically for signs of
damage. The foil must be intact and clean. Dirty
membranes should be wiped clean using a soft,
moist tissue.
Note: An undulated membrane has no influence on
the sensor performance, assuming the membrane
is intact.
• The membrane body must be replaced if the sen-
sor has a long response time, the reading is un-
stable or subject to excessive drift, and if the sen-
sor cannot be calibrated with CO
membrane shows sign of mechanical damage.
• Check the pH sensitive glass for cracks. The di-
aphragm should show a white color. If necessary
rinse with deionized water and clean carefully with
soft paper tissue.
Attention! Do not use any cleaning agents contain-
ing alcohol. This could damage the sensor or lead to
fault results.
Attention! The pH electrode is made of glass and
therefore fragile.
6.1.2 Checking wiring and transmitter
with the pH simulator
Necessary equipment:
pH simulator 112 (p/n 31 112 3003) and VP module
(p/n 52 120 939).
This equipment enables the testing of the VP cable
and correct wiring of the cable to the transmitter. Switch
the VP simulator to Pt 1000 position. Additionally it is
possible to check the linearity, temperature compen-
sation and quality of the input circuit (input resistance
and input current) of the CO
InPro 5000
52 002 465
InPro 5000 CO
transmitter.
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© 09 / 06 Mettler-Toledo AG
Printed in Switzerland
Sensor 12 mm
2
gas or the
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