Maintenance; Trouble-Shooting (Sluggish Response Time, Insufficient Sensitivity Etc.); Disposal; Guarantee - Mettler Toledo InPro 3100 Manuel D'instruction

InPro 3100 (i) pH electrode
6

Maintenance

1. Carefully rinse the electrode tip and diaphragm with
deionized water after each production cycle. Under no
circumstances must measuring solution be allowed to
dry on these parts!
2. When the electrode is not in operation, store it with
electrode tip and diaphragm well submerged into
9823 / 3M KCl or 9816 / Viscolyt™ electrolyte.
3. If the electrode is stored mounted in its housing, the
same rule as in 2) above applies, but the storage
electrolyte has to be slightly modified, with 2 parts of
buffer solution pH 9.2 to 10 parts of electrolyte, this in
order to avoid corrosion of housing parts.
4. If an electrode is stored dry for a few days by mistake,
let it soak in the normal storage electrolyte for several
hours before use.
5. Occasionally check the connector for possible traces of
moisture. If necessary, clean well with deionized water
or alcohol, and afterwards dry carefully.
7 Trouble-shooting (sluggish response time,
insufficient sensitivity etc.)
The glass membrane can be reactivated using a HF solution
(order no. 51 319 053). The electrode tip (only pH sensitive
glass part) is immersed into the HF solution for a period of
about 5 minutes, is then immediately and thoroughly rinsed
with deionized water and thereafter stored in buffer solution
pH 4 (see point 6 above) up to the diaphragm for 12 hours.
Possible protein precipitation and blockage of the diaphragm
can be treated with our special electrode cleaner (order no.
51 340 068). However, use of the diaphragm cleaner (order
no. 51 340 070) is normally not necessary for this electrode
type, as the built-in silver-ion trap prevents the formation of
silver sulfide contamination.
Also, check the connector for possible traces of moisture. If
necessary, clean well using deionized water or alcohol, and
afterwards dry carefully.
8

Disposal

If no relative official regulations are in force, used or
defective InPro 3100 (i) electrodes and the packaging can
be disposed of as ordinary household waste.
9

Guarantee

On manufacturing defects, 12 months after delivery.
© 04 / 16 Mettler-Toledo GmbH
Printed in Switzerland
InPro 3100 (i) pH electrode
en
17
52 002 293