Perma Pure eCOOL 5000 Series - Manual (Page 6)

Section C: Principle of Operation 6
C: P
RINCIPLE OF
O
PERATION
Thank you for purchasing a Baldwin
™-Series eCOOL™ 5000 Digital Thermo-
Electric Cooler. The eCOOL™ 5000 Series has numerous features including:

Remote monitoring and control of heated filter probe, heated sample line, and sample
conditioning system.

eCOOL
™
interface software included for monitoring and control over the Internet or a
Local Area Network.

A jumbo 2-line LCD display with multi- colored LED’s provides easy local monitoring and
control of your sample handling system.

Alarm notification of over / under temperature, thermocouple failure, and water slip
(moisture carryover).

Alarm relay shuts off the sample pump to protect expensive analyzers from water slip
(moisture carryover).

Eliminates the cost and complexity of separate temperature controllers such as for a
heated sample line and filter probe.

Extra thermocouple inputs and outputs available.

Operates with 110/120VAC, 220/240VAC, 12VDC, 15VDC, or 24VDC.

Field friendly, requires virtually no maintenance, and is backed by our 1-year limited
warranty.
All Baldwin-Series coolers use thermo-electric elements (Peltiers) to cool the sample
gas to the desired dew point temperature. A thermo-electric cooler is best illustrated
as a small heat pump with no
moving parts. The Peltiers
operate on direct current and
may be used for heating or
cooling by reversing the
direction of current flow. This is
achieved by moving heat from
one side of the module to the
other with current flow and the
laws of thermodynamics. A
typical single stage Peltier
(Figure 1) consists of two
ceramic plates with p- and n-
type semiconductor material
(bismuth telluride) between the
plates. The elements of
semiconductor material are
connected electrically in series and thermally in parallel.
Figure 1: Thermo-electric element (Peltier)