Maintenance; Meter Maintenance; Electrode Maintenance; Disposal - Mettler Toledo FiveEasyPlus FEP20 Bedienungsanleitung

6 Maintenance
6.1 Meter Maintenance
Never unscrew the two halves of the housing!
The Five series instruments do not require any maintenance other than occasional wipe with a damp
cloth.
The housing is made of acrylonitrile butadiene styrene/polycarbonate (ABS/PC). This material is
attacked by some organic solvents, such as toluene, xylene and methyl ethyl ketone (MEK). Any
spillage should be immediately wiped off.
6.2 Electrode Maintenance
Make sure the electrode is filled with electrolyte solution if applicable.
For maximum accuracy, any filling solution that may have "crept" and encrusted the outside of the
electrode should be removed with deionized water.
Always store the electrode according to the manufacturer's instructions and do not allow it to dry out.
If the electrode slope falls rapidly, or if the response becomes sluggish, the following procedures may
help. Try one of the following, depending the samples usually measured.
1. For fat or oil build-up, degrease the membrane with cotton wool soaked in either acetone or a soap
solution.
2. If the sensor membrane has dried out, soak the tip of the electrode in 0.1 M HCl overnight.
3. If a protein build-up has occurred in the diaphragm, remove deposits by soaking the electrode in
an HCl /pepsin solution (51350100).
4. If a silver sulfide contamination has occurred, remove deposits by soaking the electrode in a solu­
tion of thiourea (51350102).
Note
● After treatment a new calibration should be performed.
● Cleaning and filling solutions should be handled with the same care as that given to toxic or corro­
sive substances.
6.3 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 profession­
al use), the content of this regulation must also be related.
Thank you for your contribution to environmental protection.

Maintenance

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