Thermo Scientific Histocentre 3
Thermo Scientific · Model Histocentre 3
Smart-timer digital control has the unit at temperature and ready for use when you arrive at work. At the end of the day, the unit turns itself off Auto-on light setting: When paraffin is dispensed, the light automatically illuminates, when embedding is finished, the light automatically shuts off Easy-to-use touch screen display allows you to adjust settings or view temperatures quickly Thermoelectrically cooled Cold Spot aids specimen orientation Fully adjustable paraffin dispense flow rate.
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.
Wax not melting or temperature not held
HighSymptoms: Wax reservoir or dispenser not at working temperature, wax solidifying.
Root cause: Heater element, temperature sensor, or control-board fault.
Wax dispenser will not dispense or drips
MediumSymptoms: No flow from the dispenser, or a continuous drip.
Root cause: Clogged or worn wax dispenser valve / nozzle.
Cold plate / cryo module not cooling
MediumSymptoms: Cold plate not cold, blocks will not set.
Root cause: Thermoelectric (Peltier) module or its fan / control fault.
Fuses blow repeatedly
MediumSymptoms: Unit dead, replacement fuses fail again.
Root cause: A downstream short - disconnect and contact service.
Heated forceps / work-surface zone fault
LowSymptoms: A heated zone or the forceps does not warm.
Root cause: Zone heater or the forceps element / connector.
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.
Heater element
Class Major service partRel. cost $$R&R Difficult
Temperature sensor
Class Major service partRel. cost $$R&R Moderate
Wax dispenser valve / nozzle
Class Periodic replacementRel. cost $$R&R Moderate
Peltier cold-plate module
Class Major service partRel. cost $$$R&R Difficult
Fuses (replace as a pair)
Class Major service partRel. cost $R&R Fairly easy
Heated forceps
Class Periodic replacementRel. cost $$R&R Easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Heater element | Major service part | $$ | Difficult |
| Temperature sensor | Major service part | $$ | Moderate |
| Wax dispenser valve / nozzle | Periodic replacement | $$ | Moderate |
| Peltier cold-plate module | Major service part | $$$ | Difficult |
| Fuses (replace as a pair) | Major service part | $ | Fairly easy |
| Heated forceps | Periodic replacement | $$ | 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: Wax not at temperature
- Check the set temperatures for each zone.
- Confirm the heater draws current and the element is intact.
- Compare the sensor reading to an independent probe.
- Replace the sensor or element as found.
- Verify each zone reaches and holds temperature.
Symptom: Fuses blow repeatedly
- Ensure the unit is off and disconnected from mains.
- Fit correctly rated fuses as a pair.
- If they blow again, stop replacing them.
- Disconnect and contact service.
- Do not return to use until the short is found.
Technical Specs
- Height
- 12.5 in Embedding Unit
- Length
- 23 in Embedding Unit
- Weight
- 110 lbs total
- Width
- 25.1 in Embedding Unit
Documents & Manuals
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