DHR Series Getting Started Guide Page 26
Environmental Control Units
The following sections briefly describe the environmental control units for the Discovery Series
rheometers.
Peltier Plate
The standard Peltier Plate is the most widely-used temperature control system for the rheometers. It uses
the Peltier thermoelectric effect to control the temperature accurately, with rapid heating and cooling. The
plate consists of a copper disc, with hard chrome plating on the upper surface. A Pt100 temperature probe
is embedded in the disc, in thermal contact with it and close to the surface. Copper is used as the disc mate-
rial for its very high thermal conductivity, ensuring negligible temperature gradients across the surface of
the plate. The hard chrome plating prevents mechanical or chemical damage to the plate.
The Dual Stage Peltier Plate (DSPP) is a system optimized for low temperature measurements using the
standard four element array as a heat sink for a single Peltier element and top plate. This still has the same
maximum temperature as the standard plate, but because the lower Peltier elements are the heat sink for the
top element rather than a circulating fluid, low temperatures can be reached quickly, and without the use of
expensive refrigerated fluid circulators.
Refer to the Peltier Plate Getting Started Guide
for additional information.
Figure 9 Discovery Series Peltier Plate.
To Next Page
Loading...
