Type PRIME MOVER CONTROLS INC. DIGITAL TACHOMETER SYSTEM APPLICATIONS

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1 PROUT ULLTIN S Type IGITL THOMTR SYSTM PPLITIONS Monitoring Speed and irection of Rotation of: iesel ngines Gas Turbines Propeller Shafts lectric Motors Speed rives ow Thrusters Pumps TURS: Retrofits easily into existing vessels isplay update rate is proportional to change in rpm Many scale options available Senses from 0 to 9999 rpm immable illumination for night operation on ship s bridge Synchronized update for side by side indicators Microprocessor controlled digital accuracy ield adjustable with rear pushbuttons our programable set points for external logic or interlocks Programmable over speed trip with safe test option rive output for many digital tachometers rive output for six analog tachometers an be configured as a switchboard style frequency meter Optional quipment: Illuminated, IN style, analog tachometers are available Noncontact speed sensor Magnetic pickup, cable and connector are waterproof THOMTR ST R P M ST POINT 1 RUN PRIM MOVR ONTROLS IN. VNOUVR N H ST POINT 2 UNTION PROGRM VLU PRIM MOVR ONTROLS IN. S

2 SRIPTION The PM type 81 igital Tachometer is designed to accurately display the speed of rotating machinery sensed by remote magnetic pickups. It also provides a linear analog output signal for remote analog tachometers. Included with the tachometer are four set point open collector outputs which can be used for over speed trips, engine run indication, interlocks and any other digital speed functions. The display is easily readable, stable, filtered and averaged. It uses a smart time base whereby the display is updated every ½ seconds if the rpm is changing rapidly, but only every 4 seconds if the difference between displayed and measured rpm is within 1% of full scale rpm. complete system consists of a sensor, multicore shielded cable with waterproof connector, mounting bracket, igital Tachometer, and optional remotenalog Tachometers. The sensor is usually a magnetic pickup that scans gear teeth and generates a frequency signal that is proportional to the speed of rotation of the machinery. s an alternative to gear teeth, the scanned target may be magnetic tape. or applications involving rotation in two directions, a bidirectional pickup is used. This pickup generates two signals that can be compared to obtain the direction of rotation. The igital Tachometer is selfcontained. It includes all circuitry and logic required to interface with the magnetic pickups, display rpm, repeat measured values to remote locations, control over speed trip and set point relays and signal condition the output for remote analog displays. ll adjustments, such as number of teeth on sensed gear or tape, are field adjustable through rearmounted push buttons. djustment of the over speed set point is made intentionally complex to prevent casual alteration of this critical engine function. The over speed set point can be tested by putting the digital tachometer into over speed test mode. In this mode, an over speed shut down will occur when the measured speed reaches 85% of the over speed trip setting. n indicator on the front of the tachometer flashes when in over speed test mode. Optional remote meters may be igital Tachometers ornalog Tachometers. When igital Tachometers are used as remote meters they receive an amplified frequency signal generated by the main igital Tachometer (usually located in the engine control room). They have the same accuracy and capability as the main tachometer. ridge located tachometers use an externally mounted, low wattage, dimmer potentiometer. This controls the level of illumination of the display and, by means of an internal computer, provides maximum sensitivity at low intensity levels. minimum intensity adjustment is provided. Remote nalog Tachometers operate from a highresolution 010 V signal provided by the igital Tachometer. Up to six analog tachometers can be connected in parallel to each igital Tachometer. The (zero left) and (zero center) analog tachometers have 240 movement, custom scales, front mechanical zero and rear span adjustments. They can be illuminated for night operation and will operate with the or dimmers available from PM. ll components in the system are carefully selected and assembled for maximum quality and reliability. Printed circuit boards are carefully tested and conformally coated, all to PM's standard quality assurance procedures. ll components of the system are interconnected and powered for full operational tests, at PM, prior to shipments. Instruction manuals complete with typical wiring diagrams, programming details and installation data, are included with each igital Tachometer system.

3 SHT THOMTR SYSTM Typical Twin Screw System Three ridge Stations One ngineroom Station 24 VOLTS MP 5 MP IMMR W M1 M2 PW W M3 M4 IMMR SW IMMR W M5 M PROPLLR SHT MGNTI TP P/N MPU1 53 POLS GP=.035" 0.9 mm SHT I.= 6" (152.4 mm) MS 10 m L KPST 1P NRGIZ OV 100 OR YNMI RKING M7 81 IGITL TH (MSTR) PROPLLR SHT MGNTI TP P/N MPU2 53 POLS GP=.035" 0.9 mm SHT I.= 6" (152.4 mm) MS 10 m L KSST 1P NRGIZ OV 100 OR YNMI RKING M8 81 IGITL TH (SLV)

4 SP SNSOR OMPONNTS MGNTI TP PM Type magnetic tape provides a convenient, simple and low cost target for magnetic pickups. The magnetic tape is a flexible permanent magnet consisting of alternating north and south poles arranged along the tape. The tape can be bonded to a rotating shaft and a magnetic pickup placed perpendicular to the tape surface. s the tape rotates, the magnets interact with the magnetic field of the pickup which then generates the pulsating output signals whose frequency is proportional to the shaft speed. n adhesive bonding kit is provided for installation of the magnetic tape. IIRTIONL MGNTI PIKUP 43.2 (1.7") 77 (3.03") 3/4 UN TYPIL ONNTOR N VIW ORINTTION SI VIW LTS 5/8 UN2 THR 60.9 (2.4") 27.9 (1.1") 76.2 (3") MOUNTING RKTS OR MGNTI PIKUPS The PM Type magnetic pickup contains two passive, noncontact, selfpowered speed transducers in a single package that convert mechanical motion into output signals. The relation of the phase of the two signals provides the direction of rotation. The target may be gear teeth, bolts, magnets, holes or PM magnetic tape. UNIIRTIONL MGNTI PIKUP The PM Type magnetic pickup is a passive, noncontact, selfpowered speed transducer that converts mechanical motion into an output signal. The target may be gear teeth, bolts, magnets, holes or PM magnetic tape (3.00") L TI MOUNT 6.4 (0.25") TWO 1/4 UN HX H STIN LSS STL OLTS R INLU /W LT WSHR N INTRNL SHK PROO WSHR MGNTI PIKUP MOUNTING RKT PRT No LT SUP PLT OR MPU MOUNTING RKT (6") PIKUP MOUNTING HOL 57.2 (2.25") 6.4 (0.25") 38.1 (1.5") PM mounting brackets are manufactured using corrosion resistant aluminum and are anodized black. The mounting bracket provided for bidirectional magnetic pickups is the adjustable bracket assembly part No consisting of the angled mounting bracket part No , cable tie mount, flat support plate, screws and washers. The mounting bracket provided for unidirectional magnetic pickups is the adjustable bracket assembly part No consisting of the angled mounting bracket part No , cable tie mount, flat support plate, screws and washers.

5 IMNSIONL TILS SI O IGITL TH PLUGIN STYL TRMINL LOKS 7 (.28") 8 (7.0") 10 (.4") RONT O IGITL TH UTOUT TILS ST R H ST POINT 1 UNTION THOMTR P RUN PROGRM ST POINT 2 VLU PRIM MOVR ONTROLS IN. VNOUVR N M IGITL N NLOG THOMTRS R STNR 1/4 IN SIZ 96 mm SQUR MOUNTING LMPS, SPR LMPS N SPR USS R INLU WITH H THOMTR INITOR IGITL TH HOL UTOUT 90.6 x (3.54" x 3.54" ) NLOG TH HOL UTOUT 91.5 X (3.60" x 3.60" 0.02) Ø3.2 (1/8 ) IGITL TH ONLY RONT O UNIIRTIONL NLOG TH SI O NLOG TH RONT O IIRTIONL NLOG TH MOUNTING LMP (2) 0 ST 0 H (2.3")

6 IGITL THOMTR P/N 81 isplay Update Slow Speed ast Speed Synch PROUT RRN\81_\_ULLTN\S R update rate dependant on change in rpm a difference greater than 1% of full scale between measured and displayed rpm causes a change from slow to fast update speed update every 4 seconds update every 1/2 second display update synchronization available between meters located in the same console by wire jumper SPIITIONS Power 24/32 V nominal, V range urrent 0.7 nominal 2 surge Protection reverse and over voltage to 1 V use for power input 3 type 3 nalog o/p rated 10 V at 6 m maximum Pickup o/p 5, 10, 12 or m max (progrm) ccuracy front display 0.1% analog output 0.5% Resolution front display 1/2 least significant digit analog output 0.03% Illumination L display c/w internal µp dimming circuit Set points Quantity four (No.1 and No.2 are displayed on front) Type open collector100 m at 38.2 V maximum all programmable (No.1 can be over speed trip) nvironmental Storage Operating 40 to to mmHx96mmWx0mm 750 g NLOG THOMTR P/N 8540 isplay 240 meter movement ccuracy 2% full scale deflection Resolution infinite Input V at 1 m V at 101 m djustment mechanical zero rear span potentiometer nvironmental Storage Operating to to mmHx96mmWx65mm 5 g TYPIL SYSTM ITMS SUPPLI one magnetic pickup one mounting bracket one waterproof connector, prewired one preassembled cable 10 m (30 ) long one digital tachometer, scaled to suit one (or more) analog panel tachometer one optional dimmer control one optional power supply one set of spare lamps and fuses three sets of instruction manuals MGNTI TP TYP Operation Speed Magnets IIRTIONL MGNTI PIKUP P/N Operation requency & P/N to khz ( ) 0 to 25 khz ( ) Power 510 V at 52 m average ir Gap recommended 0.9 mm (0.035") nvironmental Storage Operating 30 to to mm L x mm (3.0" x 0.75") 130 g Thread 3/4 UN UNIIRTIONL MGNTI PIKUP P/N Operation requency Power ir Gap nvironmental Storage Operating Thread PRIM MOVR ONTROLS IN GILMOR WY, URNY N V5G 4R8 TL X nvironmental Operating Material ORRING T of rotation 3000 rpm maximum spacing one pulse each 9.0 mm (0.354 ) 30 to +70 chemically resistant to oils and seawater 30 mm W x 1.5 mm T (1.1 x ) grams per mm oz per inch Installation adhesive mounting kit provided sensed 10 Hz to 15 khz none recommended 0.5 mm (0.0") to +85 to mm L x 15.8 mm (4.25" x 0.625") 82 g 5/8 UN PIKUP MOUNTING RKTS Material inish corrosion resistant aluminum anodized black p/n g (4.2 oz) p/n g (8.5 oz) Mntg. Hole sized and threaded to suit the magnetic pickup selected INORMTION RQUIR magnetic pickup cable length (if longer than 10 m) sensing device gear teeth or magnetic tape number of teeth per revolution (when target is gear teeth) accurate shaft diameter (when target is magnetic tape) digital tachometer displayed speed range total number of analog tachometers analog tachometer scale range analog tachometer special scale markings nominal applied volts, or bidirectional (fixed pitch) or unidirectional (cpp or engine) LL RIGHTS RSRV