Roche cobas b 221 system User Manual

Roche Diagnostics May 2009
Service Manual · Version 9.0 D-71
cobas b 221 system 7 Troubleshooting
Value flag s
Remedy: o Perform "Calibration for Ready".
h [System] > [Calibrations] > [Calibration for Ready].
o Perform a wetting routine for the relevant module.
h [System] > [Utilities] > [Fluid actions] > [Wetting routines].
o Remove the electrode and tap the body of the electrode with a finger nail to detach
any air bubbles from the electrode membrane.
o Call up the stability monitor and check "Details" of the "Electrode slope". If the
electrode/cartridge is defective, it is displayed. Replace the corresponding
electrode or cartridge.
e For the details, see Stability monitor on page D-120.
o If the sample path is visibly contaminated, perform "Internal cleaning" for the
module (caution: MSS excepted).
h [System] > [Wash & cleaning] > [Cleaning modules].
o If the error affects potentiometric electrodes/sensors (pH, urea, all ISE electrodes),
the reference electrode of the module must be replaced.
Flag no. 2009 "Recal. not OK"
Signal difference occurring during recalibration of PCO
2
was too large.
Possible causes: o Invalid sample type used
Remedy: o Perform "Calibration for Ready".
o Call up the stability monitor and check "Details" of the "Electrode slope". If the
PCO
2
electrode is defective, it is displayed. Replace the PCO
2
electrode.
e For the details, see Stability monitor on page D-120.
Flag no. 2011 "Sensor signal instable"
Sensor signal cannot be reproduced.
Possible causes: o Invalid sample type used
o S1 Rinse Solution contaminated
o Bubbles in internal electrolyte of the electrodes on the membrane
o Interference signals in the measuring path during measurement value acquisition
o Interference signals over the reference electrodes during measurement value
acquisition
Remedy: o Check seating of top cover.
o Perform "Calibration for Ready".
o If this interference concerns the entire module, the reference electrode of the
module must be replaced.
Do not perform MSS cleaning!
When performing an internal or an external cleaning of the MSS module, the MSS cartridge will be
damaged!

Roche cobas b 221 system Specifications

General

Brand	Roche
Model	cobas b 221 system
Category	Medical Equipment
Language	English