Name
Date
Designation
Prepared
JF 05.07.13
Service Manual BB 150
Index
Name
Date
Document No.
Page
File
50078923_04_CN
50 079 823
25/ 25
4.7.4 CO
2
METERING AND REGULATION CIRCUIT
Short description:
The replaceable, connector-compatible, thermal conductivity detector (TCD with
auto-zero or infrared (IR) sensor) is integrated in the sensor block. CO
2
regulation
is
μ
P-based
.
CO
2
gas input is metered by a solenoid. The gas flowrate is also restricted by a
capillary opening with a diameter of 0.7 mm, integrated in the valve block. Before
entering the unit, the gas passes through a sterile filter that can be accessed from
outside the unit for replacement.
Circuit diagram:
See circuit diagrams in Chapter 3.
Technical specifications:
Gas flowrate:
~ 5 l/min
Gas input pressure:
1 bar
