Notice on pH-electrodes
The pH-electrode must always be kept moist to provide accurate measuring results over a long
period of time. For storage, the electrode must always be kept in a storage solution. If the sto-
rage solution is used up, you can purchase a new batch (optionally). The storage solution may
oxidise on the surface of the electrode when it spills. Remove these spills with distilled water.
Therefore, tightly close the storage bottle when storing the electrode (do not remove the O-ring).
Air bubbles may form in the electrode during transport. In this case, shake the electrode like a
fever thermometer to remove the air bubbles.
Only use distilled or de-ionised water to clean the pH-electrode. Tap water contains salt and
other components, which may falsify the later measuring result or the calibration.
The pH-electrode is a wear-and-tear part. Worn electrodes have a higher stabilisation
time and a higher measuring inaccuracy. Worn electrodes are exempt from warranty. The
pH-electrode is only suited for liquids.
8. MAINTENANCE AND CLEANING
For cleaning (rinsing) the electrode, only use distilled or de-ionised water and dab dry with paper cloths.
Do not use detergents that contain carbon, petrol, alcohol or similar substances for cleaning purposes. The
surface of the measuring instrument will be corroded. The vapours are also detrimental to health and are
explosive. Sharp-edged tools, screwdrivers or metal brushes may not be used for cleaning.
9. DISPOSAL
Old electronic devices are special waste and may not be disposed of in the household waste.
When the device has become unusable, dispose of it at the community collection point in
accordance with the statutory regulations in force.
10. TECHNICAL DATA
pH-measuring range ....................: 0.00 to 14.00 pH
Resolution ....................................: 0.01 pH
Accuracy ......................................: ± 0.07 pH (pH 5 – pH 9)
: ± 0.1 pH (pH 4 – pH 10)
: ± 0.2 pH (pH 1 – pH 4)
: ± 0.2 pH (pH 10 – pH 14)
Measuring rate .............................: 0.4 seconds
Operating temperature ................: 0 to max. +50°C
Working humidity .........................: < 80% r.h.
Voltage supply .............................: 9 V compound battery
Dimensions ..................................: 205 x 68 x 30 mm
Weight .........................................: 220g w/o electrode
Legal notice
These operating instructions are a publication by Voltcraft®, Lindenweg 15, D-92242 Hirschau/Germany, Phone +49 180/586 582 7
(www.voltcraft.de).
All rights including translation reserved. Reproduction by any method, e.g. photocopy, micro
fi
lming, or the capture in electronic data
processing systems require the prior written approval by the editor. Reprinting, also in part, is prohibited.
These operating instructions represent the technical status at the time of printing. Changes in technology and equipment reserved.
© Copyright 2012 by Voltcraft®
