Xylem ISE Electrodes Pb 60 - Handbuch (Seite 17)

Commissioning
Combination Electrode PB 60
The combination electrode is now ready to measure. Always
leave the refilling opening of the reference electrode open
while measuring.
Halfcell Pb 1100 A
For measurements using the Pb 1100 A lead electrode, an
additional reference electrode is required. The two
electrodes together form a combination electrode.