Revision 5
15
August 2021
accuracy and allows for more precise multi-species analysis than that of a conventional
photometer which uses narrow band optical filters. The conventional photometer measures only
a few discrete wavelengths, and spectrometers having lower resolution and fewer elements in
the detector are also less precise.
If, as is frequently the case, more than one of the sulfur-containing compounds indicated above
are present, their spectra will overlap. The system uses a deconvolution protocol to separate
the signals for each component via a multi component algorithm known as the
calibration
matrix
.
1.3 Analyzer Design
The Model 943-TGXeNA Analyzer System is packaged in two (2) frame mounted cabinets:
1. An
oven cabinet
which contains the sample handling system and associated
hardware (i.e., solenoids, oven, heaters, etc.). All electrical equipment residing in the
oven cabinet is installed using appropriate explosion proof and/or intrinsically safe
wiring methods.
2. A
control cabinet
which contains the electrical hardware necessary for the operation
of the analyzer. Under normal operating circumstances, the interior of the control
cabinet maintains a general-purpose area classification using a Type-Z positive
pressure purge system. Both visual and electrical (contact closure) indications are
provided for monitoring the status of the control cabinet purge. Temperature control for
the control cabinet is provided by an instrument air driven Vortec
vortex cooler
.
All connections passing from the control cabinet to the oven cabinet are via gas-tight bulkhead
connections to prevent any process gases from passing from the oven cabinet into the control
cabinet.
An external
keypad
is provided for navigation of the analyzer’s user interface and for
modification of analyzer operating parameters. This keypad is connected to a port on the control
cabinet door.
The Model 943-TGXeNA uses a fully electric heating system for the
measurement cell block
and the associated
sample handling system
.
A drawing of the Model 943-TGXeNA is shown in Figure 1.
Содержание 943-TGXeNA
Страница 130: ...Revision 5 130 August 2021 Figure 82 Oven Cabinet Door Removed ...
Страница 131: ...Revision 5 131 August 2021 Figure 83 Control Cabinet Door Removed ...
Страница 132: ...Revision 5 132 August 2021 Figure 84 Power Steam Air Signals Connection Details ...
Страница 133: ...Revision 5 133 August 2021 Figure 85 AC Wiring Schematic ...
Страница 134: ...Revision 5 134 August 2021 Figure 86 DC Signals and Wiring Diagram ...
Страница 135: ...Revision 5 135 August 2021 Figure 87 Flow Diagram ...