Owner manual

3.6 Reference electrode
746 VA Trace Analyzer / 747 VA Stand
3-29
3.6 Reference electrode
3.6.1 Construction
The complete reference electrode (RE) 4343 comprises two parts:
• 6.0728.0X0 Ag/AgCl reference system (122122)
with ceramic diaphragm type D, diameter = 1 mm
6.0728.020 Reference system: Ag/AgCl/c(KCl) = 3 mol/L;
supplied in a holder filled with c(KCl) = 3 mol/L
as standard
6.0728.010 Reference system: Ag/AgCl
supplied dry (option)
• 6.1245.010 Electrolyte vessel (123123)
with ceramic diaphragm type D, diameter=3 mm;
holds a second electrolyte solution (bridge
electrolyte) and thus forms with the 6.0728.020
Reference system a complete reference electrode
in the so-called double junction construction.
The construction of the reference electrode and the designations of the individual
parts are shown in Fig. 17.
43
123
130
131
132
122
124
125
126
127
128
129
Fig. 17: Construction of the reference electrode
4343 Reference electrode
122122 Reference system (6.0728.0X0)
123123 Electrolyte vessel (6.1245.010)
124124 Electrical connection for cable
"AE"
125125 Vent opening
126126 Ag/AgCl reference system
127127 Electrolyte compartment with
internal electrolyte
128128 Diaphragm support made of
PCTFE
129129 Diaphragm
130130 Vent opening
131131 Electrolyte compartment with
bridge electrolyte
132132 Diaphragm