Accriva Diagnostics Hemochron 801
Accriva Diagnostics · Model Hemochron 801
Dual well analyzer. Portable. Battery-operated coagulation instruments designed for bedside use. 2 Channels. Range of Coagulation Test: APTT, PT, TT, HNTT, ACT, PDA.
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.
Calibration error (FAULT 04 / 05)
HighSymptoms: "FAULT 04" or "FAULT 05" on the LCD, a shift in clinical/QC values, or a failed detector-sensitivity test.
Root cause: Loss of the fixed-calibration status - contact ITC Technical Service; do not attempt field recalibration.
Clot-detection / detector sensitivity fault
MediumSymptoms: Daily detector-sensitivity check fails, erratic clot times.
Root cause: Magnetic detector or optics in a test well degraded.
Test-well temperature out of range
MediumSymptoms: Results drift, temperature verification tube (HE1001) reads outside 37 C.
Root cause: Well heater or temperature-control fault.
Short battery run time
MediumSymptoms: Low-battery indicator early, unit will not run a full shift.
Root cause: Aged nickel-cadmium battery cells or a charger fault.
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.
Nickel-cadmium battery pack
Run on battery during the day and charge overnight to keep the cells exercised.
Class Periodic replacementRel. cost $$R&R Fairly easy
Test-well heater / temperature sensor
Class Major service partRel. cost $$R&R Moderate
Clot-detection (magnetic) detector assembly
Class Major service partRel. cost $$$R&R Difficult
HEMOCHRON test tubes / QC plasma
Class Frequent wear itemRel. cost $R&R Easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Nickel-cadmium battery pack Run on battery during the day and charge overnight to keep the cells exercised. | Periodic replacement | $$ | Fairly easy |
| Test-well heater / temperature sensor | Major service part | $$ | Moderate |
| Clot-detection (magnetic) detector assembly | Major service part | $$$ | Difficult |
| HEMOCHRON test tubes / QC plasma | Frequent wear item | $ | Easy |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
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: FAULT 04 or 05 / shifted results
- Run multiple tests with HEMOCHRON control plasma at two levels.
- Perform the daily detector-sensitivity check with an empty test tube.
- Verify the test-well temperature with the HE1001 verification tube.
- If a calibration error is confirmed, contact ITC Technical Service immediately.
- Do not send the instrument for service before running the controls.
Symptom: Short battery life
- Fully charge overnight on AC.
- Note the continuous run time (should be 4-6 hours).
- Confirm the daytime-battery / overnight-charge routine is being followed.
- Replace the NiCad pack if run time is short.
- Re-verify run time after replacement.