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What This Guide Helps With
Meter locked out due to failed or overdue QC, control solution errors, or improper QC procedure preventing patient testing.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Do not perform patient testing while the meter is in QC lockout.
- Move testing to another verified meter.
- Expected: Patient testing continues safely on another device
- Why it matters: QC lockout prevents use of a device that may produce inaccurate results
Verify the Lockout Message
- Power on the meter and confirm the exact message (e.g., QC required, QC failed, or lockout).
- Expected: Clear indication of QC-related lockout
- Why it matters: Confirms the issue is QC-related, not a hardware or strip error
Check QC Status and Requirements
- Review the QC status in the meter menu
- Determine if QC is overdue
- Confirm if the correct level (Level 1 or Level 2) is required
- Expected: Meter indicates which QC level is needed
- Why it matters: Performing the wrong level or skipping required QC will keep the device locked
Verify Control Solution Integrity
- Check that the control solution is not expired
- Confirm proper labeling (Level 1 or Level 2)
- Ensure it was stored correctly and not overheated or contaminated
- Expected: Control solution is valid and usable
- Why it matters: Expired or compromised solution is a common cause of QC failure
Inspect Test Strips
- Check strip vial is not expired
- Verify strips are correct for Accu-Chek Inform II
- Ensure vial is properly closed and stored
- Expected: Strips are valid and undamaged
- Why it matters: Bad strips can cause repeated QC failures
Perform QC Test Properly
- Insert strip fully
- Apply control solution correctly (do not smear or underfill)
- Ensure adequate sample volume
- Expected: QC result falls within acceptable range
- Why it matters: Technique errors are a frequent cause of QC failure
Check Environmental Conditions
- Ensure room temperature is within operating range
- Avoid excessive humidity or cold exposure
- Expected: Stable testing environment
- Why it matters: Environmental factors can affect strip and control performance
Repeat QC with New Supplies
- Open a new vial of strips
- Use a new control solution bottle
- Expected: QC passes with fresh materials
- Why it matters: Confirms issue was supply-related, not device-related
Check Docking / Connectivity (If Applicable)
- Ensure the meter has synced recently
- Place in dock or confirm wireless connection
- Verify time/date are correct
- Expected: Meter is up to date with system requirements
- Why it matters: Some lockouts are enforced by connectivity or outdated QC records
Reboot the Meter
- Power cycle the device and retry QC
- Expected: Meter restarts cleanly and allows QC attempt
- Why it matters: Clears minor software or interface issues
If the Problem Persists
If QC continues to fail after verifying technique, strips, and control solutions, the issue is likely internal (optical system, calibration drift, or electronics).
Remove the device from service, label it Out of Service, and send for repair or bench evaluation.
Knowing when to stop prevents unreliable patient testing and is proper Clinical Engineering practice.
Clinical Use Tip
Always perform QC away from patient care areas when possible, and never troubleshoot QC failures while the meter is needed for active patient testing.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Meter locked out and unable to perform patient testing due to QC failure."
Cause
What was observed during troubleshooting.
Example:
"Expired control solution causing QC results outside acceptable range."
Resolution
What action was taken.
Example:
"Replaced control solution and strips, performed successful QC, and returned meter to service."
Helpful Details to Include (If Known)
- QC error messages observed
- Control solution expiration date checked
- Strip lot and expiration verified
- QC results (pass/fail values)
- New supplies tested
- Docking/connection status confirmed
- Final device status (passed QC or removed from service)
Final Thought
QC lockouts are safety features, not failures to bypass. A structured approach—starting with supplies and technique—prevents unnecessary repairs and ensures patient safety. Proper documentation supports traceability and compliance.
That is successful troubleshooting.