Roche Diagnostics
Operator’s Manual · Version 3.1 A-53
Cedex Bio System 3Hardware
Hardware overview
Reagent bottles
Chimneys
Tubes
The Cedex Bio instrument can use both primary and secondary tubes (cups).
You can use any type of primary tube, as long as their dimensions lay within
prescribed limits.
o Maximum height (including secondary tube): 102 mm
o Minimum height: 70 mm
o Maximum outside width: 16.3 mm
o Minimum outside width: 11.8 mm
The Cedex Bio instrument works exclusively with reagent bottles
that are equipped with a two-dimensional barcode.
Each bottle holds up to 20 mL of fluid. The actual volume depends
on the test.
Place the bottles on the reagent disk as instructed by the software.
Reagents are handled in reagent sets. A set consists of up to three
reagents. You always load and replace all bottles of a set.
Chimneys are bottle inserts that reduce evaporation.
For reagents that are especially sensitive to concentration changes,
Roche recommend using chimneys on the reagent bottles.
To generally reduce evaporation, you may use chimneys on all
reagent bottles.
Incorrect results due to declining reagent quality
If the application definitions (see package insert) recommend the use of chimneys, the
corresponding calibration intervals apply to conditions when working with chimneys.
Roche recommend using chimneys whenever this is recommended on the test insert.
Incorrect results due to insufficient fluid
Insufficient fluid may lead to inaccurate pipetting and consequently to incorrect results.
Always fill the tubes with sufficient fluid that at the end of the pipetting process at least the
dead volume of fluid is left.
e
See Tubes on page A-53.
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