Maintenance; Meter Maintenance; Electrode Maintenance; Disposal - Mettler Toledo SevenEasy S20 Bedienungsanleitung

10.

Maintenance

10.1

Meter maintenance

There are no user-replaceable parts in the meter or power supply unit. Do not remove the covers.
The SevenEasy needs no maintenance except for an occasional wipe with a damp cloth. The housing
is made of ABS/PC which is attacked by some organic solvents, such as toluene, xylene and methyl
ethyl ketone. It is good laboratory practice to wipe away any spillage immediately.
10.2

Electrode maintenance

Make sure the electrode is always kept filled with the appropriate filling solution. For maximum ac-
curacy, any filling solution that may have "crept" and encrusted the outside of the electrode should be
removed with distilled water.
Always store the electrode properly and do not allow it to dry out.
If the electrode slope value falls rapidly, or if the response becomes sluggish or inaccurate, the following
procedures may help. Try them one by one in the order given.
1. Degrease the membrane with cotton wool soaked in either acetone or soap solution.
2. Soak the tip of the electrode in 0.1 M HCl overnight.
3. If a protein build-up has occurred, remove deposits by soaking electrode in a HCl / pepsin solution
(Order Nr. 51340068).
4. If a silver sulfide contamination has occurred, remove deposits by soaking electrode in a thiourea
solution (Order Nr. 51340070).
Note
Cleaning and filling solutions should be handled with the same care given to toxic or corrosive sub-
stances.
10.3

Disposal

In conformance with the European Directive 2002/96/ EC on Waste Electrical and Electronic
Equipment (WEEE) this device may not be disposed of in domestic waste. This also applies
to countries outside the EU, per their specific requirements.
Please dispose of this product in accordance with local regulations at the collecting point
specified for electrical and electronic equipment.
If you have any questions, please contact the responsible authority or the distributor from which you
purchased this device.
Should this device be passed on to other parties (for private or professional use), the content of this
regulation must also be related.
Thank you for your contribution to environmental protection.
METTLER TOLEDO SevenEasy
Maintenance
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