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Asset Type
Manufacturer
Model
What This Guide Helps With
QC lockout, failed control tests, or meter preventing patient testing due to quality control requirements or invalid QC results.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Do not delay patient care due to meter lockout. Move testing to another verified meter if needed.
Expected: Patient testing continues safely on alternate device
Why it matters: QC lockout is a safety feature and should not be bypassed
Verify the Reported Lockout or Failure
- Check the display for messages such as:
- QC required
- QC failed
- Lockout active
Expected: Clear indication of QC-related restriction
Why it matters: Confirms the issue is QC-related and not a device malfunction
Check QC Requirements and Timing Settings
- Verify if the meter requires:
- Daily QC
- QC after strip lot change
- QC after maintenance or battery replacement
- Review facility policy if needed
Expected: QC requirement aligns with lockout condition
Why it matters: Many lockouts are triggered by normal policy settings, not failures
Inspect Control Solution (Most Common Cause)
- Check the control solution for:
- Expiration date
- Open vial date (many expire 90 days after opening)
- Proper storage (room temperature, not overheated or contaminated)
Expected: Control solution is valid and within use period
Why it matters: Expired or degraded control solution commonly causes QC failures
Check Test Strips
- Verify:
- Correct strip type for Precision Xceed Pro
- Not expired
- Proper storage (sealed, dry, not exposed to humidity)
- Lot number matches what the meter expects (if applicable)
Expected: Strips are valid and compatible
Why it matters: Strip issues are a leading cause of QC failure
Perform QC Test Correctly
- Repeat QC using proper technique:
- Mix control solution gently
- Apply correct drop size (not too small or excessive)
- Avoid contamination of strip port
- Follow on-screen prompts exactly
Expected: QC result falls within acceptable range
Why it matters: Technique errors are a frequent cause of failed QC
Compare QC Results to Acceptable Range
- Check that results fall within the range printed on the strip vial or control insert
Expected: Result is within defined QC limits
Why it matters: Out-of-range results trigger lockout by design
Try a New Bottle of Control Solution and New Strip Vial
- If QC continues to fail:
- Open a new control solution
- Use a new vial of strips
Expected: QC passes with fresh materials
Why it matters: Eliminates degraded consumables as the cause
Check Meter Cleanliness and Strip Port Condition
- Inspect for:
- Dried solution residue
- Debris in strip port
- Signs of contamination
- Clean per manufacturer-approved method (no liquid intrusion)
Expected: Clean, unobstructed strip port
Why it matters: Contamination can affect strip readings and QC accuracy
Power Cycle the Meter
- Turn the meter off and back on, or reseat the battery if applicable
Expected: Meter resets and allows QC attempt
Why it matters: Clears minor software or temporary lock conditions
If the Problem Persists
If QC continues to fail after verifying control solution, strips, and technique, the issue is likely internal (measurement circuitry or calibration fault).
Remove the meter from service, label it Out of Service, and send for repair or bench evaluation. Do not attempt further troubleshooting beyond this point.
Clinical Use Tip
Never perform QC or troubleshooting while the device is in active patient use. Always switch to a verified meter before troubleshooting.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Meter in ED locked out due to repeated QC failures and unable to perform patient testing."
Cause
What was observed during troubleshooting.
Example:
"Expired control solution and degraded test strip vial causing out-of-range QC results."
Resolution
What action was taken.
Example:
"Replaced control solution and test strips, performed QC successfully, and returned meter to service."
Helpful Details to Include (If Known)
- QC error messages displayed
- Control solution expiration and open date verified
- Strip lot and expiration checked
- QC results (in or out of range)
- Cleaning performed
- Alternate supplies tested
- Final device status (returned to service or removed)
Final Thought
QC lockouts are designed to protect patient safety, not hinder workflow. Most issues stem from consumables or technique, not device failure. Logical troubleshooting prevents unnecessary repairs and ensures reliable testing. Proper documentation supports both compliance and long-term device performance tracking.
That is successful troubleshooting.