Gas Monitoring System - Rel-Tek Corporation - #1

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Specification: Gas Monitoring System - (Rev-13c) 1. General Operation -- The Gas Monitoring System (GMS) operates as a stand-alone, autonomous system, monitoring ambient methane, propane, carbon monoxide or other combustible and toxic gas sensors as well as any other parameters for which 4-20ma analog signals and on/off dry contact switches are connected. It shall be capable of polling, receiving, analyzing and activating alarms and controlling plant equipment on/off, such as fans, doors, heaters, pumps, electrical power, and the like, and shall be capable of logging sensor data, digital on/off states and alarm and plant controls to hard disk memory, along with time and date for later retrieval, printout and graphical display. The GMS shall be capable of remote interrogation and re-configuration via a LAN or a dial-in phone link, as well as providing access for remote viewing and control of screens, logs and files -- via phone line, Internet and/or LAN network -- all with appropriate password security.2. GMS Central Station -- The GMS central station shall include a 500 MHz (or faster) PC running a Windows 98 (or higher) multi-tasking operating system, and shall have at least 128MB RAM, an 8-GB hard drive, a 24x CD-ROM drive, a 3-1/2" floppy drive, a keyboard and mouse, a 17" (or larger) color monitor, a sound card, an optional color printer and a 56 KB fax/data modem. A telemetry driver with power supply shall be included to interface between the computer and the data communications bus. An appropriate LAN network card shall be included if networking is required. The GMS central station shall be powered from a secure 110- 120VAC mains connection at the central station . 3. Computer Cabinet -- The GMS computer, monitor and communication driver shall be installed in a 26"W x 21"D x 63"H lockable, free standing, welded-steel cabinet having a clear plastic hinged door for easy viewing of the monitor screen. The cabinet shall also include a ventilation fan, intake air filter, a magnetically shielded loudspeaker, an RJ11 phone line jack, a 6-ft input power cord, an internally mounted quad-outlet AC power box, and roll around casters. The air filter shall be readily changeable as needed. A drawer shall be provided to house the keyboard, having roller glides for ease of use. The cabinet shall be finished with durable black satin/textured paint.4. GMS Operation --a) The Main GMS Computer -- The GMS computer shall run true (native) 32-bit multi-tasking monitoring software under a Windows 98 or higher operating system. Real-time monitoring software shall include a polling function, a 3-D graphics user interface with screen customizing tools, on-line screen configuration capability with a setup tool bar, selectable data and alarm logging, graphic control/alarm setup utilities, status and diagnostics screens, safe auto-shutdown on loss of mains power and subsequent depletion of the UPS battery, and with automatic reboot to full operation on return of mains power. System shall communicate to field I/O modules at selectable baud rates over a twisted pair cable for a distance of at least five miles without the need for repeaters. Optical isolated repeaters and splitters shall be available for extending distances and for handling data bus branching. System I/O capacity shall extend to at least 253 I/O card addresses, encompassing as many as 1012 analog sensors, 1012 digital contact inputs, and 1012 on/off control outputs. Action thresholds shall be configurable on a sensor by sensor basis, while "on-line" and without interfering with on-going monitoring and control functions. Any number of action and alarm thresholds shall be settable using graphic click and drag utilities, so as to control any or all of the outputs from any analog threshold or digital input status. A means to restrict alarms to two or more confirming sensor alarm thresholds shall be possible. A numerical "communication reliability" index shall be employable in the same manner as any sensed analog parameter, using preset threshold crossings to activate alarms and controls; and these moving indexes shall be available for logging. Sensor and status parameters causing alarm or control actions shall be shown graphically in real time, with the active control path highlighted in red for easy source recognition. Alarm suppression, time delays, hysteresis, auto or manual alarm return, and logging modes shall be selectable for each threshold setup, as well as for statistical communication reliability, all using simple menu prompted setup options. The communication system shall incorporate a watchdog timer which will automatically close a security relay to notify management of loss of communications in excess of (selectable) 1- 5 minutes. The communication system shall be fast operating, having sensor data updates and control executions not exceeding 2 seconds when system is nominally loaded in its operational configuration. A security feature shall permit the use of as many as 26 level-specific passwords to secure the various setup, viewing, print and other system functions (window viewing and setup, alarm, control, print, change, load/save, log, etc.) or any other normal menu functions. A utility shall be included to easily backup the system configuration and log files to floppy disks or to a ZIP drive. Initial setup and subsequent reconfigurations shall be possible anytime without interrupting ongoing monitoring, alarming and logging functions. Sensor alarm and/or service advisories shall be indicated on the screen in distinctive red or orange color. Fully automatic, unattended sensor calibration shall be an available option, see below. b) Remote computer workstations -- The GMS shall include software for multi-client internet links via OWNER's existing LAN hub (if available), providing real-time access to monitored data, alarms and logs.Remote computer site(s) shall be capable of configuring and utilizing whatever viewing screens, logs, printouts, controls, passwords, etc, as are available in the main computer, however, no remote shall be permitted to change any setups or actions in the main processor. Any number of remote computers shall be supported, within the speed and capacity of the LAN. If remote computer sites are specified, the supply of additional remote PCs, as well as the LAN hardware and software, shall be at extra cost. c) Phone line access -- Means shall be provided for transferring status/control screens, examining files, diagnosing setup errors, off-loadingfiles and changing the setup on the main computer using any password authorized PC via a data quality public phone line. This feature requires extra hardware and software, and may be quoted separately.d) Implementation of setup changes shall commence immediately upon selecting the new setup file, i.e. without having to recompile any programs or re-boot the computer. Control and alarm logic shall be graphically displayed as "virtual wiring", including at least twelve screen pages containing OWNER-defined control strategy diagrams made up of logical arrangements of "inputs", "outputs", "and gates", "or gates", "flip-flops", variable time delays, on/off pulsing, sound output, and time/date scheduling of events. Virtual wiring shall graphically display the flow lines of controls and processes, showing explicitly when graphic interconnections are properly made. All shall be configurable using click and drag mouse operations. Activation of stored sonic/voice (wave file) messages, as well as user-definable computer control script, shall be available options on the control logic screen, executable on any sensor status condition. A color change from black to red shall indicate an active control path. SUPPLIER shall install and program the GMS software and screens for the initial operation.e) Screen drawing tools shall include lines, circles, ellipses, boxes, text, hot buttons (click-on controls); digital and analog meter icons; dynamic bar charts and graphs; and shall permit importing of bitmap files (e.g. scanned drawings, photographs, logos, etc.) A variable positioning grid shall be available. Icons, including bitmaps, shall be elastically expandable using click and drag methods. Professional utilities such as cut, paste, duplicate, align and group shall be available. The tool bar shall "float" for full screen access. Screen icons shall be controllable -- i.e. dynamically changing color, size, position, rotation, fill (horizontal and vertical), and visibility (and invisibility) -- based on the status of any monitored sensor, any on/off switch position, or any controlled output. An "object test" mode shall enable a new screen to be dynamically tested with real data without leaving the screen configuration window.f) Alarm/control events, as well as any starting and stopping of polling functions, shall be logged to memory with time and date stamp, unless configured otherwise. A selectable option shall require I.D. of the operator in order to acknowledge an alarm, along with typed comments to be added to each alarm log. All setup information and parameters shall be printable for hard copy records. Printing shall be available on right click command. An alarm status screen shall list all currently outstanding (unacknowledged) alarm and control conditions. Offline review of raw, alarm logs shall be possible using log files, with each data entry identified by date/time stamp. To facilitate alarm log review and analysis, the log files shall be sortable by type, six levels of criticality and eight functional categories, as well as date/time of occurrence.g) Automatic report printout shall be executable on a scheduled, calendar date, shift and/or time of day basis. Selection of report printout format shall encompass any available screen.h) Hot standby computer – If requested, a hot standby, fully redundant computer shall be provided. The standby unit shall automatically replace the monitoring and control functions of the primary computer in the event of a defined failure of the primary. A local alarm shall sound when standby is activated, and circumstances of the event shall be logged in hard drive memory for future analysis. A key-protected manual switchover shall also be available. i) Automatic gas sensor calibration -- This utility shall be setup and controlled through the main computer software, providing for inputting sensors by logical groups, types, addresses, etc. Scheduled calibrations shall be selectable as daily, weekly, monthly, by-monthly, semi-annually,annually, or by specific date selections such as: the first, second, third, etc. - Mon, Tues, Wed, etc, of the month; and at any specific time of the day. Calibration ranges, gas concentrations, dwell times, and other parameters