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

16
6

Maintenance

6.1

Inspection

6.1.1 Visual inspection

To check the sensor, we recommend the following pro-
cedure:
– The contacts of the connector must be dry. Mois-
ture, corrosion and dirt can lead to false readings.
– 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 wip ed clean using a soft,
moist tissue.
h
Note: An undulated membrane has no influence on the
sensor performance, assuming the membrane is intact.
– The membrane body must be replaced if the sensor
has a long response time, the reading is unstable
or subject to excessive drift, and if the sensor can-
not be calibrated with CO
shows sign of mechanical damage.
– Check the pH sensitive glass for cracks. The dia-
phragm should show a white color. If necessary
rinse with deionized water and clean carefully with
soft paper tissue.
a
Attention! Do not use any cleaning agents containing
alcohol. This could damage the sensor or lead to
fault results.
a
Attention! The pH electrode is made of glass and
therefore fragile.
6.1.2 Checking wiring and transmitter
with the pH simulator
Necessary equipment for analog CO
InPro 5000:
pH simulator 112 (p/n 59 906 431) 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
6.2 Changing the CO
and membrane body
We recommend to use a new membrane body after
each batch (see section 4.3). After each calibration
of the pH electrode (section 4.2) new CO
should be filled in the membrane body.
InPro 5000 (i)
52 002 465 G
InPro 5000 (i) CO
gas or the membrane
2
transmitter.
2
electrolyte
2
© 03 / 2023 METTLER TOLEDO
Sensor 12 mm
2
sensor
2
electrolyte
2
Printed in Switzerland