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Thermo Fisher Scientific
Operation Manual HM550
Chapter 2
Introduction
Open top cryostat. Modular design. Stainless steel cooling chamber.
Chamber temperature regulation variable from -10°C down to -35°C.
When the instrument is equipped with the option O, the specimen
temperature can be controlled from +10°C down to -50°C.
Graphic LC-display of set and actual temperatures, electronic control
with user-oriented touchpad keyboard, battery-buffered memory and
self-diagnostic system. Standby and sleep status for noise reduction and
energy savings. Automatic defrosting and in addition a manual defrost
cycle which can be activated when needed. Defrost interrupt on key-
stroke request. Integrated fast freezing device with controlled cooling
element down to -60°C (option P). Sliding window with heater and
integrated fluorescent lamp for cryo-chamber. Brush shelf and storage
space inside the cryo-chamber. Large, flat storage space on top of the
housing with integrated storage space for marked slides.
Rotary Microtome with backlash and maintenance-free cross roller
bearings in stainless steel. Electro-mechanical feed system.
Section thickness setting from 1 to 100 microns;
up to 10 µm in 1 µm-increments,
up to 20 µm in 2 µm-increments,
up to 70 µm in 5 µm-increments and
up to 100 µm in 10 µm-increments.
Trimming thickness setting from 5 to 500 microns;
up to 10 µm in 5 µm-increments,
up to 100 µm in 10 µm-increments,
up to 200 µm in 20 µm-increments and
up to 500 µm in 50 µm-increments.
Specimen retraction during the return stroke with optical indication.
Horizontal feed range 28 mm. Vertical cutting stroke 60 mm. Max.
specimen size 75 x 55 mm.
Motorized coarse feed in two directions with three speed selections.
Limit indication and automated switch off at front and rear limits of
horizontal travel. Automatic approach system for exact and safe ap-
proach of specimen towards the knife edge from -5°C to -35°C.
Section counter and indication of sum of section thicknesses with reset-
button. Indication of remaining travel.
Hand wheel brake in any position. Fine orientation of specimen with
zero device. Rotatable on Z-axis, 360°.
Description of the
HM550 Series
Introduction
Description of the HM550 Series
