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What This Guide Helps With
Troubleshooting urine strip timing, placement, transport, or positioning faults that prevent reliable CLINITEK Advantus sample analysis.
Step-by-Step Troubleshooting
Ensure Patient Safety and Specimen Integrity First
Confirm the analyzer is not processing an urgent patient specimen that could be delayed by troubleshooting.
If testing is clinically time-sensitive, have the lab use another validated urine analyzer or follow approved backup testing procedures.
Expected outcome: Patient testing is not delayed while the analyzer fault is investigated.
Verify the Reported Problem
Ask the operator what was observed:
- Strip not advancing correctly
- Strip placed too early or too late
- Timing error message
- Strip position error
- Incomplete read
- Analyzer rejects the strip
- Results appear inconsistent with the sample
Expected outcome: The issue is tied to sample timing, strip placement, or strip movement rather than a general power, printer, or LIS issue.
Confirm the Correct Strip Type Is Being Used
Verify the urine reagent strips are compatible with the CLINITEK Advantus and approved for that site.
Check that the bottle has not been left open, exposed to moisture, expired, or mixed with strips from another bottle.
Expected outcome: Correct, in-date strips are being used.
If incorrect or expired strips are found, replace them with approved strips and repeat testing according to lab policy. If this resolves the issue, stop.
Inspect Strip Placement Technique
Observe the operator placing a strip into the analyzer.
Confirm the strip is:
- Inserted in the correct orientation
- Placed flat and straight
- Not angled, curled, bent, or dragging
- Not inserted too far or too shallow
- Not placed before the analyzer is ready
Expected outcome: Strip placement matches the normal operating workflow.
Why it matters: A strip that starts in the wrong position may trigger timing or transport errors even if the analyzer itself is working correctly.
Confirm Sample Application Timing
Verify the operator is dipping or applying the urine specimen according to approved lab procedure before placing the strip into the analyzer.
Look for signs that the strip is being delayed too long after dipping, inserted too early, or handled inconsistently between samples.
Expected outcome: The strip is being introduced within the expected timing window.
If improper timing is identified, have the operator repeat the test with a new strip and fresh specimen handling. If this resolves the issue, stop.
Check for Excess Urine on the Strip
Inspect whether the strip is overly wet, dripping, or leaving fluid on the transport area.
Confirm excess urine is removed according to lab procedure before the strip is placed.
Expected outcome: The strip is wet enough for testing but not carrying excess fluid into the analyzer.
Why it matters: Excess liquid can interfere with strip movement, optical reading, and positioning detection.
Inspect the Strip Transport Area Externally
With the analyzer idle and safe to inspect, look at the strip loading and transport area for:
- Dried urine residue
- Crystallized buildup
- Loose strips or strip fragments
- Paper fibers
- Dust or debris
- Sticky movement surfaces
- Evidence of spilled specimen
Expected outcome: The strip path is clean, dry, and free of visible obstruction.
If contamination is present, clean only according to approved site procedure and manufacturer cleaning guidance. Then retest with a control or test strip per lab policy. If this resolves the issue, stop.
Check Strip Movement During a Test Cycle
Run a test or control cycle using normal lab procedure while observing the strip movement.
Confirm the strip:
- Enters smoothly
- Moves without hesitation
- Does not skew sideways
- Does not stop unexpectedly
- Reaches the read position consistently
Expected outcome: Strip transport is smooth and repeatable.
If the strip stalls, skews, or hesitates repeatedly, the issue may involve the transport mechanism, positioning sensor, or internal alignment.
Inspect for Mechanical Interference
Check that any accessible covers, guides, trays, waste areas, or strip handling components are properly seated.
Do not force parts or remove internal covers beyond normal Clinical Engineering access.
Expected outcome: No loose, misaligned, or obstructed external components are affecting strip movement.
Power Cycle the Analyzer
If the fault appears intermittent, power the analyzer down using the normal shutdown method if available.
Wait briefly, then restart the analyzer.
Allow the unit to complete startup checks before retesting.
Expected outcome: Temporary software or cycle-state errors clear after restart.
If the analyzer returns to normal operation and passes required QC, document and return to service according to site policy.
Run Quality Control or Known Test Material
Have lab staff run required QC or known acceptable test material after any cleaning, strip replacement, or restart.
Expected outcome: QC passes and strip timing or positioning errors do not return.
If QC fails or the positioning error repeats, do not return the analyzer to service.
Review Error Pattern
Determine whether the fault occurs:
- With every strip
- With one strip bottle only
- With one operator only
- After cleaning
- After a spill
- After relocation
- Only during high-volume use
Expected outcome: The fault pattern helps separate user technique, consumable issue, contamination, and analyzer failure.
If the Problem Persists
If correct strips, proper timing, strip placement technique, cleaning, restart, and QC checks do not resolve the issue, common external causes have been ruled out.
The CLINITEK Advantus should be:
- Removed from service
- Labeled Out of Service
- Sent for repair or bench evaluation
The likely cause may involve the strip transport mechanism, timing detection, positioning sensor, optical read area, motor drive, or internal alignment. Do not continue repeated patient testing attempts on an analyzer with unresolved strip timing or positioning faults.
Knowing when to stop is proper troubleshooting.
Clinical Use Tip
Do not troubleshoot strip timing or positioning faults while patient testing is actively dependent on the analyzer. Move testing to another validated method or backup analyzer first. After any intervention, confirm acceptable QC before returning the CLINITEK Advantus to clinical use.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Lab reported the Siemens CLINITEK Advantus was rejecting urine strips with repeated strip positioning and timing errors during sample testing."
Cause
What was observed during troubleshooting.
Example:
"Found excess urine residue and dried buildup in the strip transport area, causing strips to skew during movement."
Resolution
What action was taken.
Example:
"Cleaned accessible strip path per approved procedure, verified correct strip placement technique, ran QC successfully, and returned analyzer to service."
Helpful Details to Include (If Known)
- Exact error message or fault code displayed
- Whether the fault occurs with all strips or one bottle
- Strip lot number and expiration date
- Whether strips were stored with the cap closed
- Whether the strip was inserted straight and flat
- Whether excess urine was present
- Condition of strip transport area
- Any visible residue, crystallization, or debris
- QC pass or fail results after troubleshooting
- Whether the analyzer was restarted
- Final device status
Final Thought
Sample timing and strip positioning faults should be approached logically. Start with specimen safety, strip condition, operator technique, visible contamination, and proper movement before assuming internal failure. If the analyzer continues to reject or misposition strips after external causes are corrected, remove it from service and escalate for repair. Clear CCR documentation protects patient testing quality and helps identify repeat analyzer or workflow issues.
That is successful troubleshooting.