Beckman Coulter LH 750
Beckman Coulter · Model LH 750
Performance and Results that Exceed Your Expectations The LH 750 analyzer is equipped with superior technologies, NRBC enumeration and random access capabilities. These advancements help high-volume labs eliminate manual pre-sorting of samples and speed results to clinicians. With this system, you can improve overall efficiency, while maintaining the highest degree of testing accuracy.
Key tips
- ·Run QC controls before trusting any repair - an analyzer that passes self-test can still report clinically wrong results.
- ·Rule out a reagent lot change before opening the instrument - it can look exactly like a hardware fault.
- ·Centrifuge rotors have a hard retirement age/cycle limit regardless of visible condition - don't eyeball it.
Typical Failure Modes
Compiled for this model from its own documentation and established engineering knowledge for this equipment class - not from a verified service record. Confirm against the manufacturer's service manual.
Aperture blockage / partial obstruction
HighSymptoms: Flagged or implausible CBC counts, voteouts, aperture-clog alarms, poor precision.
Root cause: Debris or a clot partially blocking a counting aperture.
Autoloader / sample-transport jam
MediumSymptoms: Tubes not advancing, cassette / carousel error, mixing-station fault.
Root cause: Worn autoloader belt / gripper, a mis-loaded rack, or a mixing-station fault.
Sample probe / piercer wear
MediumSymptoms: Short samples, aspiration errors, cap-piercing failures.
Root cause: Worn or bent sample probe / closed-vial piercer.
Reagent / lyse delivery fault
MediumSymptoms: WBC, HGB or diff results shifted, high background, reagent alarms; note the LYSE-lot recall history.
Root cause: Reagent depleted or wrong lot, or a pinch-valve / tubing fault.
HGB photometer / retic (VCS) optics fault
MediumSymptoms: Haemoglobin or reticulocyte results biased, blank absorbance off, optics alarm.
Root cause: Photometer lamp aging, a dirty flow cell, or the retic optics.
Serviceable Parts & Consumables
Serviceable items for this model, compiled from its documentation and engineering knowledge for this equipment class. Service class and relative cost are estimates, not manufacturer figures; no part numbers are given. Confirm intervals and pricing against the manufacturer.
Sample probe / closed-vial piercer
Class Periodic replacementRel. cost $$R&R Moderate
Autoloader belt / gripper
Class Periodic replacementRel. cost $$R&R Moderate
Pinch-valve / peristaltic tubing
Class Frequent wear itemRel. cost $R&R Moderate
HGB photometer lamp / VCS flow cell
Class Periodic replacementRel. cost $$$R&R Difficult
System reagents / controls
Class ConsumableRel. cost $$R&R Easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Sample probe / closed-vial piercer | Periodic replacement | $$ | Moderate |
| Autoloader belt / gripper | Periodic replacement | $$ | Moderate |
| Pinch-valve / peristaltic tubing | Frequent wear item | $ | Moderate |
| HGB photometer lamp / VCS flow cell | Periodic replacement | $$$ | Difficult |
| System reagents / controls | Consumable | $$ | Easy |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
PM Checklist
Preventive-maintenance tasks typical of this equipment class. Perform to the manufacturer's procedure and your facility's policy - this is general reference, not a schedule for this specific unit.
- ·Daily QC controls run and reviewed
- ·Calibration verification per assay
- ·Routine cleaning and decontamination
- ·Scheduled reagent-path and pump-tubing maintenance
Troubleshooting Approach
A starting sequence for this model, compiled from its documentation and engineering knowledge for this equipment class. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Aperture-clog alarm / flagged counts
- Run the instrument's aperture-clear / flush cycles.
- Run a background count and confirm it is within limits.
- Run controls at all levels (use the Special Procedures and Troubleshooting manual).
- Clean or replace the aperture bath if clogs recur.
- Confirm precision on a replicate sample.
Symptom: Autoloader jam / short samples
- Clear the jammed tube / rack.
- Inspect the autoloader belt / gripper and the mixing station for wear.
- Inspect the sample probe / piercer for a bend or blockage.
- Check tubing and pinch valves for leaks.
- Replace the worn component and re-run controls.
Technical Specs
- Height
- 35 in
- Length
- 24 in
- Weight
- 205 lbs
- Width
- 40 in
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- Central / core laboratory
- Point-of-care testing stations
- Blood bank
- Microbiology lab
Documents & Manuals
- Operators Guide Body Fluid Application.pdfUser Manual · External
- Operators Guide Slide maker.pdfUser Manual · External
- Operators Guide Sytem.pdfUser Manual · External
- Reference Guide.pdfUser Manual · External
- Instrument IFUManual.pdfDocument · External
- Special Procedure and Trouble Shooting.pdfDocument · External
Safety & Recalls
Synced live from the FDA openFDA API.
- RECALL
Beckman Coulter is recalling the LH 750 and LH 780 Hematology Systems because the optical degradation may potentially cause a delay in reporting results for nucleated red blood cells (nRBC), white blood cell differential and/or reticulocytes.
- RECALL
This recall was initiated because Beckman Coulter identified a problem with some date fields that are transmitted to the Laboratory Information System (LIS). Starting Jan 1, 2011, the date fields will transmit as a blank field to the LIS if the year is greater than 2010. The following dates are affected: Run date, Control expiration date, Date of birth (For individuals born in 2011 or later), a
- RECALL
A rare risk of sample misidentification exists with Coulter LH 750 Hematology Analyzers. The printout results from the instrument are affected; however, the results stored in the workstation's database are not affected.
Related calculators
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