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IM 11Y01B01-01E-A 6th Edition :Feb 13, 2013-00
<4. ANALYZER COMPONENTS>
4.6 Process Interface
An appropriate Process Interface is selected to suit the process/stack installation. The analyzer is
detachable from the process interface to facilitate Off-Line calibration and service.
Process Interface Options
There are several systems available as well as custom designs for specific applications.
• Flanged O-Ring Alignment comprises typical 2” or 3”process
flange with a large diameter O-Ring seal, typically used for
stack or inert applications that are non-corrosive.
• Flanged Metal Bellows Seal comprises typical 2” or 3”
process flange with a metal bellows seal and external
mechanical alignment system, typically used when gas
containment is important.
• LAO-Large Aperature Optics, for long path combustion
application.
• Flow Cell may be used when the process gas has been
extracted or is used in a by-pass flow loop. This allows for
heat tracing (if necessary) and easy introduction of both Zero
and Span gases.
• Isolation Flanges are supplied with process windows
mounted in the flanges themselves typically for very
corrosive and/or high pressure applications.
• By-Pass Piping may be used when the process gas line is of
small diameter (typically <10”) and when no suitable section
of pipe work exists on this which the analyzer can be
mounted. By pass piping systems may be provided or
supplied at site. Heat tracing may also be supplied or
provided at site.
• Off Line Calibration Cell is used for off line verification of the
system. This cell is used to flow Zero and Span gases when
the analyzer is not connected to the process.
TDLS200 TDL Analyzer Instruction Manual V2.1
Page 29 of 131
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The cable entry located on the bottom face of the enclosure. It is typically a ¾” Myers hub that has
a ¾” NPT female thread. It has a ground lug to facilitate the grounding of cable shields to the
analyzer chassis.
Detector Circuit Board
main function is to convert detector photocurrent into voltage and send it
to be sampled.
LEDs are incorporated to provide simple diagnostic of available power.
The board has a temperature sensing chip/circuit that monitors the ambient temperature inside the
detect electronics enclosure. The sensor is located on the top edge of the detect board to ensure
the maximum temperature reading is monitored.
The board is medium size (approx. 4” H x 6” W) printed circuit board that mounts inside the
enclosure. The field terminations are located along the lower edge of the board via pluggable
terminal block. All components and devices on the board are designed for extended temperature
and low drift operation.
2.3.7 Process Interface
An appropriate Process Interface is selected to suit the process/stack installation. The analyzer is
detachable from the process interface to facilitate Off-Line calibration and service.
Process Interface Options
There are several systems available as well as custom designs for specific applications.
Flanged O-Ring Alignment comprises typical 2” or 3”
process flange with a large diameter O-Ring seal,
typically used for stack or inert applications that are
non-corrosive.
Flanged Metal Bellows Seal comprises typical 2” or
3” process flange with a metal bellows seal and
external mechanical alignment system, typically used
when gas containment is important.
Flow Cell may be used when the process gas has
been extracted or is used in a by-pass flow loop.
This allows for heat tracing (if necessary) and easy
introduction of both Zero and Span gases.
Isolation Flanges are supplied with process windows
mounted in the flanges themselves typically for very
corrosive and/or high pressure applications.
By-Pass Piping may be used when the process gas
line is of small diameter (typically <10”) and when no
suitable section of pipe work exists on this which the
analyzer can be mounted. By pass piping systems
may be provided or supplied at site. Heat tracing
may also be supplied or provided at site.
Off Line Calibration Cell is used for off line
verification of the system. This cell is used to flow
Zero and Span gases when the analyzer is not
connected to the process.
Figure 8 - Process Interface Examples
Flanged with Metal Alignment
Typical Cross Pipe/Stack
Typical Flow Cell / By-Pass
Figure 13 - Process Interface Examples
