Roche Diagnostics
60 Instructions for Use · Version 10.0
4 Theoretical foundation 9180 Electrolyte Analyzer
Electrode specifications
Calcium electrode
The calcium electrode is a membrane electrode used for in vitro diagnostic
measurement of calcium ions present in fluid samples. It is designated with a Ca
2+
marking on the top surface of the housing.
Construction
Figure 4-6 Calcium electrode
Use and care
Calcium electrodes are manufactured for use in 9180 Electrolyte Analyzers.
Proper care should be used in handling and storage of the electrode. Never use strong
or abrasive cleaners such as alcohol or amphyl on the electrode since these will
damage the plastic housing.
Store the electrode in a clean, dry place only after the electrode has been cleaned and
rinsed with distilled water and dried with a lint-free cloth.
The o-ring seal should be installed in the electrode during storage.
CAUTION
Result misinterpretation and incorrect medical decisions
The guiding arrow on the display can be wrong if the unit for Ca
2+
is set to mg/dL (Service
Code MGL configured) and if a measured Ca
2+
value is lower than the normal range.
r Make sure that Ca
2+
- values are reported in mmol/L instead of mg/dL or contact your
Roche Services representative.
r If you use the unit mg/dL for Ca
2+
, always use arrow information from the printout and
not from the display
Electrode housing:
transparent acrylic plastic
Measuring membrane:
calcium ion selective
Electrolyte chamber:
airtight, filled with electrolyte solution for Ca
2+
electrodes
Pin connector:
silver, silver chloride (Ag / AgCl)
A Inner electrode E Ion-selective electrode
B Sample path F Electrolyte chamber
C Marking G Connecting pin
D O-ring seal H Marking - serial number - 5 digit lot number
B
D
E
G
H
C
F
A
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