Trotec BW10 Operating Manual page 6

2. Insert the batteries (4 x LR44 button cells) into the battery
compartment with correct polarity.
3. Screw the lid back on the battery compartment. In doing so,
make sure that the rubber seal is properly seated.
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BW 10
BW 10
CAL
HOLD
Operating manual – pH measuring device BW10
Removing the protective cap
The device has already been calibrated at the factory using a
highly concentrated saline solution. This often leads to the
formation of salt crystals at the diaphragm electrode (fibre
bundle) during later usage. These visible residues are
completely normal for pH measuring electrodes of this type.
Such residues are harmless for the measuring electrode and
can easily be washed off with water; thus they do not represent
any quality defect!
The measuring electrode is protected from external influences
by means of a protective cap.
1. Prior to every measurement pull the protective cap off the
measuring electrode.
2. After every measurement put the protective cap back on the
electrode.
Performing calibration
Info
Before calibration immerse the measuring probe in
distilled water for approx. 10 to 15 min.
To perform a calibration of the pH measuring device, you first
have to prepare the buffer solutions contained in the supplied
set.
The buffer solutions correspond to the pH values 4 (red),
7 (green) and 10 (blue) with an accuracy of ±0.01 pH (at 25 °C).
EN