Marsh Bellofram DigiTec Division 758-AB Series Base Model Tachometer - Marsh Bellofram - #1

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758-AB Series Digitec Division atcdigitec.com 800.727.5646 334 Tachometers/Generators // 758-AB Series The 758 Series of tachometers all use a multi-pole cylindrical magnet turning in a wound stator constructed from quality transformer iron lamination. Single phase output current is a sine wave over the speed range of the tachometer. These units have 100 ohm stators and are intended for voltage responsive systems. When greater accuracy is required, use a tachometer having a 32 ohm stator (designation F in the type number) and a frequency responsive indicating system. For speeds over 5,000 rpm, use the bearingless AC generators on page 339. Rigid cast-aluminum base; light-weight, dust-proof aluminum alloy housing. 1/2" diameter shaft extension for direct coupling drive, pulley, chain and sprocket, or spur gear. Two binding posts for electrical connection. Approximate torque: 2.5 oz.-in. starting, 2.5-oz.-in. running (1000 RPM). Binding Post Cover Box: Available for Types AB, JB2 and KB3 (both voltage and frequency-responsive models). Provides protection for terminals, and has a 1/2" NPT connection for conduit. Cat. No.. B a s e M o d e l T a c home t e r BINDING POST COVER BOX \\\SPECIFICATIONS VOLTAGE OUTPUT AT 1000 RPM 10 Volts AC ±1% Per 1000 RPM Open Circuit ACCURACY ±1% EMF LINEARITY 1 Dependent Upon Load and Speed PERMISSIBLE CURRENT DRAIN 150 mA FREQUENCY AT 900 RPM 60 Hz Sine Wave ALLOWABLE END PLAY 0.005" MAX OPERATING TEMPERATURE 250°F INTERNAL RESISTANCE AT 25°C Standard Unit 100 ½ ±1% F. Type Unit* 32 ½ ±20% INSULATION Insulation Class 105 ROTOR Alnico V, 8 Poles STATOR 8 Poles BEARINGS Ball TEMPERATURE COEFFICIENT Standard Unit 0.2% Per 10°C Change F. Type Unit* Not Compensated, 0.4% Per 10°C Change MIN. SPEED 500 RPM MAX. TOP SPEED 5000 RPM STARTING TORQUE 2.0-3.0 oz. ins. RUNNING TORQUE AT 1000 RPM 2.3 oz. ins. SHAFT DIAMETER 1/2" SHAFT CONNECTION Direct, Geared or Belt SHAFT LENGTH 1" (w/.87 Flat) ELECTRICAL CONNECTION 10-32 Studs MOUNTING Base ENCLOSURE Dust Resistant MEASUREMENTS 4.39" L x 2.97" H x 2.82" W WEIGHT 2.89 Ibs. (1.31 kg.) Approximate *F-Type generators for use in frequency responsive systems only. any of the above types can be supplied for use in frequency systems \\\DIMENSIONS (INCHES/MILLIMETERS) \\\ORDERING INFORMATION MODEL NUMBER DESCRIPTION 758-9901000 758 Type AB Tachometer-Generator for Voltage-Responsive Systems 758-9901001 758 Type ABF Tachometer-Generator for Frequency-Responsive Systems ACCESSORIES 9933-0143157 Binding Post Cover Box