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monitoring- and read-out systems, digital tachometer units, gener- ator automatic transfer, and many others. PAS equipment can be found in all corners of the world onboard many types of vessels, such as an 80,000-dwt tanker; a 200-foot off- shore supply vessel; a 140-foot, triple-screw river towboat; a 50- foot, twin-screw pushboat; a 200- foot jackup barge; 65-foot, twin- screw pilot boats; 100-foot, triple- screw, high-speed crewboats; 140- foot oceangoing tugs; and nu- merous other types. Starting some 14 years ago in the 650-square-foot garage of its founder's home, PAS was launched into the manufacturing of its first monitoring and alarm panel intended for a dredge. This was to become a total disaster. This failure furnished the man- agement of PAS with many im- portant facts, and renewed its de- termination to become a leader in the industry. Many new directions were set by PAS products, among them the philosophy that "if you make the electronics sound and simple enough, it should need no main- tenance." To prove that point, in 1970 PAS started manufacturing equipment with the electronic cir- cuitry that carried a five-year un- conditional operating warranty. Write 78 on Reader Service Card ROCHESTER INSTRUMENT Series 4644 manufactured by Rochester Instrument Systems (RIS) of Rochester, N.Y., is a family of vibration-monitoring equipment consisting of: primary sensing elements that detect vi- bration levels and movements; signal conditioning devices that amplify and transmit sensor in- puts ; and plug-in, electronic mod- ules that continually report these signals as useable data and ini- tiate warnings and/or shutdown when preset limits have been ex- ceeded. Single- and dual-channel moni- toring modules and a common system control module provide the operator's interface with the system to monitor the radial vi- bration, axial position, and phase reference of rotating machinery. RIS high-density systems of- fering eight to 20 rack positions are available in seven standard configurations. All of them con- form to, and in many areas ex- ceed, the requirements of API 670. For instance, these systems occupy only about 50 percent of the panel space needed for con- formance. Standard features of a Series 4644 system include a "power-up inhibit" feature to prevent false alarms; a flashing LED to identi- fy first out alert or danger alarms; and field-selectable switching to permit on-site selection of such Write 248 on Reader Service Card • operating modes as latch/non- latch danger alarms, time delays, shutdown logic, and relay ener- gize/de-energize for shutdown. Series TM-2480 from RIS is a line of self-contained thermocou- ple and RTD temperature moni- tors capable of monitoring from six to 30 points. The units pro- vide independent alarm and shut- down functions, and incorporate three-channel, plug-in modules to provide high-density packaging. Three models are available: TM- 2481 for monitoring up to six points; TM-2482 for up to 12 points; and TM-2485 for up to 30 points. Each series TM-2480 unit in- corporates a meter/common serv- ice module that includes the digi- tal readout, optional integral cal- ibration facilities, plus comrnm alarm and common shutdown re- lays for all channels. These mon- itors are intended for use with primary sensors that are T/Gs and RTDs, but they can also ac- cept and condition analog input signals from other types of sen- sors. Another feature of the units is their ability to detect sensor failure without shutting down the monitoring function. Write 79 on Reader Service Card (continued on page 32) Magnavox Delivers All That Satcom Offers. The Magnavox MX 111 terminal ties your ship into Marisat's fast, private, clear, world- wide communications network. Our full capability system operates in telephone, telex, data and facsimile modes. And it's completely compatible with all present and known future require- ments, including Inmarsat. Now you can take full advantage of Marisat — and more. The MX Ill's com- prehensive option list includes interface with the ship's PABX. Bridge indicator units that assure that after hours messages won't go unnoticed. And Then Some. A choice of TTY units, includ- ing electronic models, plus a sophisticated VMS package that lets your shore-based office automatically receive information on ship's posi- tion, engine data, cargo con- dition, weather—virtually anything measurable by elec- tronic sensors. Fortunately, all these capa- bilities don't take up much space in your radio room. Only the absolute minimum of equipment —compact tele- phone and TTY—go there. Sensible, modular design lets you tuck the electronics in any convenient place. They're easily connected to our rugged, passively stabilized antenna. That's Marisat, Magnavox style. It's the only technically proven system that's designed specifically for ships and sup- ported world-wide by a leading marine electronics company. For details on the best system afloat, contact Marine Systems Operation, Magnavox Advanced Products and Sys- tems Co., 2829 Maricopa St., Torrance, CA 90503. Tele- phone (213) 328-0770. Telex 696101. Cable MAGNAMAR. 0212 • B IX/lciqncrx^ Magnavox Advanced Products and Systems Company
