Manual

15
Leica ASP6025
2. Safety
2.3 Safety features on the instrument
The Leica ASP6025 tissue processor is equipped with numerous safety functions and with sophis-
ticated software control mechanisms. These ensure that the specimens remain undamaged in the
event of a power failure or other malfunction during the inltration process and that the inltration
is completed successfully.
Overpressure protection
• Whenpowerisswitchedothepressureairpumpandvalvesdefaulttoasafecondition(retort
vented, no pressure generation).
• Ifthepumpisnotstoppedatthecorrectmomentduringthepressurization,thepowersupply
is interrupted by a separate electronic circuit.
• Inaddition,thereisasafetyreliefvalvethatventsallexcessairpumpoutputtoatmosphere.
Overcurrent protection
• Overcurrentconditionsareprotectedagainstbyboththemainfuseandtheseparateheating
power fuses.
Overheating protection
An error is indicated and all heating is stopped by the microprocessor control if the instrument
detects any of the following conditions:
• Abnormallyhightemperature(>75°C),
• Contradictoryresultsofthetemperaturesensors.
• Failureofoneormoreheatingpowercontrolcomponents.
• Ifthemicroprocessorfailstointerruptheatingpower,independenttemperaturelimiting
hardware circuits limit the temperature rise to a safe level.
• Ifthetemperaturelimitingcircuitsmalfunction,anindependenthardwarethermalfusecircuit
cuts power to the heating elements.
Over vacuum protection
• Thevacuumsystemisnotcapableofgeneratingadangerousvacuumcondition.