2.6.11
Oxygen Trim Drive
Oxygen trim drive shall be in-line piston type actuator in linkage from
jackshaft to combustion air damper. Oxygen trim drive shall act to
position combustion air damper based on signal from oxygen trim controller.
2.6.12
Supervisory Computer Workstation
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NOTE: For new central steam plants or as an upgrade
of existing central steam plants consider the
following section to provide remote monitoring
capability trend logging and graphical system
interface.
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a.
Dedicated monitoring and data collection system supervisory
computer workstation, complete with custom software shall be
provided as specified. Supervisory computer workstation computer
shall collect and store data transmitted from system controllers
and other sensing and monitoring devices, shall log alarms, and
shall use software described to generate periodic reports. Data
collection function shall take priority over report generation
function and shall not be interrupted by generation of reports.
b.
Supervisory computer workstation computer shall log data at five
(5) second interval that is adjustable as required. In event of
alarm condition or unusual plant operating condition, supervisory
computer shall immediately initiate data logging.
c.
Supervisory computer workstation computer shall be designed such
that a failure of the CPU, the storage disk, or any other device
shall not result in the loss of any previously stored data.
d.
Supervisory computer workstation shall include the computer,
keyboard, printer, monitor, and other peripherals and shall be
located as shown. Cabling between the work station and the system
controllers shall be provided by the Contractor. The Contractor
shall provide all prefabricated cabling required between the work
station and peripheral devices.
e.
Authorized personnel shall be capable of editing and modifying
programs with access code. Password protection shall be provided
for all levels of access. The multiple level password protection
system shall be acceptable to the Owner.
f.
Supervisory computer workstation computer shall be microprocessor
based personal computer. Computer shall be provided with eight
expansion slots. Computer shall be Microsoft Windows (R)
compatible, each with a floppy disk drive, 17 inch high resolution
SVGA color monitor for graphic displays. The hard disk drive
shall have sufficient capacity to perform required data
substitution routines without accessing other data storage media.
[Provide a 650 MB CD-RW reader-writer-rewriter drive with minimum
of 8X write, 4X rewrite and 24X read speeds and 25 preformatted
rewritable and 100 preformatted writable CD media disks or
archival and routine backup.] Following minimum equipment shall
be part of the supervisory computer workstation:
SECTION 15561A
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