Campbell CPEC300, Руководство по эксплуатации продукта

Страница: 162 / 175

K-1
Appendix K. CPEC310 Scrub Module
Installation
,
Operation
,
and Maintenance
The CPEC310 Scrub Module provides a stream of air that has been scrubbed of
CO
2
and H
2
O and is used for zeroing the EC155. The module is housed in a
fiberglass enclosure that can generally be mounted to the same structure as the
CPEC310 system enclosure. The enclosure is shown in FIGURE K-1 , and the
specifications can be found in Appendix K.2 , Scrub Module Specifications
(p. K-2
).
FIGURE K-1. CPEC310 scrub module
K.1 Theory of Operation
The CPEC310 Scrub Module provides an air stream with CO
2
and H
2
O
removed to zero the EC155. It includes a small diaphragm pump to push the
zero air to the analyzer and three bottles containing a molecular sieve to
remove CO
2
and water vapor from ambient air. The pump provides
approximately 1.5 LPM flow. It has a heater and fan to keep it within its
operating range (5 to 50 °C) over ambient temperatures down to –30 °C. The
CPEC310 scrub module is intended to replace the cylinder of compressed zero
air.