MVE Biological Systems
TEC 3000 Operating and Maintenance Freezer Manual
13289499 Rev H •
35
7.1.4.
Temperature Measurement
The TEC 3000 is equipped with two independent temperature measurement channels. They
are designed to be used with 1000 ohm platinum RTD temperature probes, also referred to as
Pt-1000 RTDs. The electrical resistance of the very fine platinum wire in these probes changes
linearly with temperature. Platinum’s very linear relationship between resistance and
temperature makes Pt-1000 RTDs ideal for temperature measurement in cryogenic
environments. The temperatures displayed on the TEC 3000 LCD are not real-time readings,
but rather a running average of the previous few measurements. The TEC 3000 takes
temperature measurements several times a second and then averages the previous few
measurements while updating the displayed temperature every second. The optional hot gas
bypass temperature sensor is also a Pt-1000 RTD.
Figure 6: P
latinum’s linear relationship between temperature and resistance
Содержание MVE 1842P-150
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