Bayer HealthCare ADVIA 60, Operator'S Manual

Page: 99 / 128

9. MAINTENANCE AND TROUBLESHOOTING
Page 9/7 075D0002-01
9.2. TROUBLESHOOTING
9.2.1. Overview
Your ADVIA 60-
CT
may occasionally require troubleshooting if :
- System operations are faulty.
- The background count is unacceptably high.
- Your control values are out-of-ranges, or patient results are suspicious (e.g., consistently high
RBC counts or inability to verify results by manual methods).
- Precision is poor.
- Calibration is drifting.
9.2.2. Identification procedure
The first step in any troubleshooting session is to identify the source of the system malfunction:
system operations, reagents, precision, or calibration. These steps should be carried out in
sequence as described below :
9.2.2.1. System operations
Press the START key and observe the instrument operation as described in section 4. If the ADVIA
60-
CT
appears to be operating properly, continue with the identification procedure. If operations
are faulty, identify the source of the malfunction and initiate appropriate troubleshooting procedures.
9.2.2.2. Reagents
If your background count is unacceptable, your control values are out-of-range, or your patient
results are suspicious, reagent deterioration or contamination can be suspected. Replace your
reagents and perform the concentrated cleaning procedure. Obtain a background count, and if
appropriate, reassay controls or patient samples. If the background count is acceptable, but
control values are still out-of-range (or patient results are still suspicious), continue with identification
procedure. If replacing reagents and performing concentrated cleaning does not correct the
background count, call your local technical support provider or distributor.
9.2.2.3. Precision
Analyze a fresh patient sample 5 to 10 times and calculate the coefficient of variation (%CV).
NOTE:
The %CV is calculated by dividing the standard deviation of the measurements by the
mean and multiplying this result by 100.
NOTE:
To locate parts of the analyzer mentioned in the following discussions, see the diagrams
in section 5.