Roche cobas b 221 system User Manual

Roche Diagnostics May 2009
Service Manual · Version 9.0 D-103
cobas b 221 system 7 Troubleshooting
Important test routines
Calibrate: The sample sensors are calibrated with the measuring medium located in the sample
path (normally with air). The air calibration will set the sample sensor values to
100 %.
High values for I-LED when injecting and measuring water indicate clogged sample
sensors, bent or not corectly plugged light guides.
Meas. sensors
BG
h At the ready screen, press [System] > [Component test] > [Meas. sensors] > [BG].
Use this function to monitor the BG module.
Overview The current sensor values will be displayed in the column "Signal". Standard
deviation in column "Std. dev." must not exceed the follwing values for optimal
aspiration of Mix 1:
Aspirate Mix 1: h Press [Aspirate Mix 1].
Mix 1 will be positioned into the measurement chamber.
External sample: h Press [External sample].
An external sample will be positioned into the measurement chamber.
Figure D-8 BG
Sensor Signal from[mV] Signal to [mV] Std. dev. [mV]
PCO
2
-1300 2000 1.5
PO
2
-- -- 1.5
pH -2100 1600 3
Ta bl e D -3
The boundaries provided for standard deviation are valid for Mix 1 only!

Roche cobas b 221 system Specifications

General

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