Description And Intended Use - Thermo Scientific EK45 Manuel D'installation

General Information
Section 2
The EK45 Immersion Cooler has a one-stage refrigerating circuit. The coolant
Description
circuit's evaporator coil, shaped as spiral-shaped cooling element, connects to the
and Intended
cooling unit with a flexible, specially heat-insulated hose. It can be immersed in a
vessel with an inner diameter of >85 mm and a depth of >200 mm. The cooling
Use
unit compressor is air-cooled and fully hermetically sealed.
The EK90 has a two-stage refrigerating circuit. The cooling element is a flexible
corrugated coil and can be bent to the desired vessel. The inner diameter of the
vessel cannot be smaller than 110 mm (2 x the smallest bending radius of 40 mm
= 80 mm plus 2 x the diameter of the corrugated coil at 13 mm = 26 mm). The
vessel depth can be as small as 100 mm. These are the minimum dimensions for
the cooling element however frequent bending with very small radii can damage the
corrugated coil. If multiple bends are necessary a minimum diameter of at least 250
mm (bending radius of 110 mm) is required.
Both units are equipped with a built-in temperature controller with a red LED
display.
A temperature stability of approximately 1°C to 2°C is possible. Any temperature
within the working temperature range can be set, see next page. A heater is necessary
for applications requiring temperatures above the ambient temperature.
The temperature controller features the display of the actual temperature, the
setpoint temperature and a control status display.
Both are supplied with a Pt100 temperature sensor. The sensor is monitored for
breakage and short-circuiting. The sensor should be located in the bath in the direct
vicinity of the cooler's evaporator coil.
Cooling is done using heat exchangers that draw off and expel the heat. The cooling
capacity depends to a great extent on the free flow of cooling air through the two
ventilation grids. These grids (one at the front and one at the rear side) must be kept
free of all obstacles at all times!
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