Transporting The Instrument; Disposal; Technical Data - Mettler Toledo SevenDirect SD23 Benutzerhandbuch

If the electrode slope falls rapidly, or if the response becomes sluggish, the following procedures may help. Try
one of the following, depending on your sample.
Problem
Fat or oil build-up
pH electrode membrane has dried out
Protein build-up in the diaphragm of a pH
electrode
Silver sulfide contamination of pH electrode Remove deposits by soaking the electrode in a thiourea solution.
Run a new calibration after treatment.
Note
Cleaning and filling solutions should be handled with the same care as that given to toxic or corrosive
substances.
The condition of the pH electrode can also be checked, using the provided METTLER TOLEDO method
Sensor Test.

6.3 Transporting the instrument

Note the following instructions when transporting the instrument to a new location:
Transport the instrument with care to avoid damage! The instrument may be damaged if not transported
correctly.
Unplug the instrument and remove all connected cables.
Remove the electrode arm.
To avoid damage to the instrument when transporting it over long distances, please use the original
packaging.
If the original packaging is no longer available, choose packaging that will ensure safe handling.

6.4 Disposal

In conformance with the European Directive 2012/19/EU 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, the content of this regulation must also be related.

7 Technical Data

General
SevenDirect™ SD23
Action
Either rinse the membrane with soap solution or acetone/ethanol
or shortly soak the tip of the electrode in warm water. When
rinsed with organic solvent, place the membrane overnight in
0.1 mol/L HCl.
Soak the tip of the electrode overnight in 0.1 mol/L HCl.
If this procedure has no effect, soak the tip of the electrode for a
few minutes in reactivation solution for pH electrodes.
Remove deposits by soaking the electrode in an HCl/pepsin
solution for few hours or overnight.
Screen Color TFT
Interfaces USB-A
USB-B
USB-Stick (FAT12/FAT16/FAT32)/
Printer/barcode reader
Computer
19