Roche Diagnostics
62 Instructions for Use · Version 10.0
4 Theoretical foundation 9180 Electrolyte Analyzer
Electrode specifications
Reference electrode assembly
The reference electrode assembly is a device used as an electrical junction between
the sample and electrical ground.
Construction
The reference electrode assembly consists of two parts: the reference electrode
housing and the reference electrode.
Reference electrode housing
In the reference electrode housing, reference electrolyte solution establishes the
electrical contact between the reference electrode and the sample. At the beginning of
each measurement, reference electrolyte is pumped into the housing. At the same
time, a glass capillary allows a small amount of reference electrolyte to pass into the
measuring capillary, thus establishing electrical contact between the sample and the
reference electrode (see Figure 4-8 Reference electrode assembly (p. 63)).
Figure 4-8 Reference electrode assembly
Use and care
Reference electrode housings are manufactured for use in
9180 Electrolyte Analyzers.
Proper care should be used in handling and storage of the electrode housing. Never
use strong or abrasive cleaners such as alcohol or amphyl on the housing.
Store the Reference Electrode Housing in a clean, dry place only after the Reference
Electrode has been removed and the housing cleaned and rinsed with distilled water
and dried with a lint-free cloth.
The o-ring seals should be installed in the housing during storage.
A O-ring seal (a) E Exit - reference solution
B Marking F O-ring seal (c)
C Glass capillary G O-ring seal (b)
D Entrance - reference solution H Marking - serial number - 5 digit lot number
A
F
C
D
E
H G
B
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