Standard Operating Procedure (SOP) – Analyzer Maintenance & Operation

1. Power Requirements
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A. Grounding:
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Ensure proper earth grounding before use.
 
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B. Fuse & Power Cord:
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Use only the specified fuse type and provided power cord.
 
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C. Voltage Check:
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Verify input voltage matches analyzer requirements before powering on.
 
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2. Environmental Requirements
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A. Temperature:
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Normal range: 15°C – 30°C
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Operating range: 10°C – 40°C
 
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B. Humidity:
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Normal range: 20% – 85% RH
 
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C. Atmospheric Pressure:
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70 kPa – 106 kPa
 
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D. Workplace Conditions:
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Free from dust, vibration, contamination, noise, and electrical interference.
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Avoid strong electromagnetic fields (e.g., brush motors, flickering lights, frequent electrical switching).
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No direct sunlight, heat sources, or drafts.
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Well-ventilated area.
 
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E. Placement:
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Use on a stable, level indoor workbench.
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Connect only to a properly grounded outlet.
 
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3. Pre-Operation Checks
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A. Reagent Inspection:
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Check for sufficient volume, turbidity, deterioration, and bent tubing.
 
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B. Connections:
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Verify correct external device and power connections.
 
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4. Startup & Login
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Turn on the printer (if connected).
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Power on the analyzer.
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Enter username and password at the login prompt.
 
5. Background Check (Automatic on Startup)
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Acceptable Limits:
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WBC ≤ 0.2×10⁹/L
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RBC ≤ 0.02×10¹²/L
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HGB ≤ 1g/L
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PLT ≤ 5×10⁹/L
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HCT ≤ 0.5%
 
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If Failed:
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A second retest occurs automatically.
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If still failed, an "Abnormal Background" alarm triggers—refer to the Troubleshooting manual.
 
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6. Daily Quality Control (QC)
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Run QC tests before sample analysis (refer to Chapter 7: QC in the manual).
 
7. Selecting Work Mode
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Options:
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Whole Blood Mode
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Pre-Diluted Mode
 
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Sample Input Methods:
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Enter all information manually or
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Input only the Sample ID.
 
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Click "OK" to confirm settings.
 
8. Sample Analysis
Whole Blood Mode
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Mix EDTA-anticoagulated sample thoroughly.
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Place under the probe and press [Aspirate].
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Remove tube after beep; analysis begins automatically.
 
Pre-Diluted Mode
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Click "Dilute" and follow on-screen instructions.
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Press [Aspirate] to add 200μL diluent (avoid bubbles).
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Add 20μL blood, cap, and mix.
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Wait 5 minutes, remix, then aspirate for analysis.
 
9. Standby Mode
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Activates after idle time (set in settings).
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Press [Aspirate] to resume operation.
 
10. Shutdown Procedure
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Click "Shutdown" on the main menu.
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The analyzer performs probe cleaning.
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At "Confirm" prompt, click "OK" and power off all devices.
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Empty and properly dispose of waste containers.
 
11. Troubleshooting
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Click the error message (bottom-right of screen) for guidance.
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Refer to Chapter 11: Troubleshooting in the manual.
 
12. Regular Maintenance
Daily:
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Normal shutdown with probe cleaning.
 
Monthly:
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Wipe external surfaces and probe wipe block (use 75% alcohol).
 
Extended Non-Use (>2 Weeks):
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Perform Pack-up function and power off the analyzer.