Metrohm 797 VA Computrace - Manual (Page 44)

2 Installation
797 VA Computrace / Hardware-Manual 8.797.8001EN
36
2.5 Reference electrode
2.5.1 Construction
The complete reference electrode (RE) 26 comprises two parts:
• 6.0728.0X0 Ag/AgCl-reference system (100)
with ceramic diaphragm type D, diameter = 1 mm
6.0728.030 Reference system: LL-Ag/AgCl/c(KCl) =3 mol/L;
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 (101)
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. 13.
Fig. 13: Construction of the reference
electrode
26 Reference electrode
100 Reference system (6.0728.0X0)
101 Electrolyte vessel (6.1245.010)
102 Electrical connection for cable
"RE"
103 Vent opening
104 Ag/AgCl filling
105 Electrolyte compartment with
internal electrolyte
106 Diaphragm support made of
PCTFE
107 Diaphragm
108 Vent opening
109 Electrolyte compartment with
bridge electrolyte
110 Diaphragm
100 26
104
107
102
103
105
106
101
108
109
110