User Guide Panel Mount Digital Tachometer Model 461950
Introduction Congratulations on your purchase of the Extech 461950 Panel Tachometer. This meter displays continuous readings from 5 to 99,990 rpm. Single pulse activation eliminates the need for special gears when setting up the meter in any given application. Models 461955 (proximity sensor) and 461957 (photoelectric sensor) are also covered in this manual. Careful use of these devices will provide years of reliable service.
Mounting Instructions Panel Meter Mounting 1. The 461950 dimensions are: Meter: 3.61 x 1.66 x 3.54 " (92 x 42 x 90 mm) Bezel: 3.78 x 1.89 x 2.36 " (96 x 48 x 60 mm) 2. Prepare a panel cutout with the following dimensions: 3.62 x 1.77" (92 x 45 mm). 3. The Tachometer will fit a standard 1/8 DIN cutout. Mounting hardware is provided which attaches to the sides of the meter.
Wiring Instructions The Model 461950 has seven screw terminals for AC power, sensor input, and sensor excitation. Model 461955 Proximity Switch Wiring 1. Brown wire (10 - 30V supply signal) to terminal 3 on the panel tachometer (+12V) 2. Black wire to terminal 2 3. Blue wire to terminal 1 Model 461957 Photoelectric Sensor Wiring 1. Brown wire connects to terminal 3 of the panel tachometer 2. Blue wire connects to terminal 1 3.
Meter and Sensor Operation Meter Operation Mount and wire the meter as previously described. The Model 461950 Panel Mount Tachometer was designed to measure and display RPM in the following ranges: Ranges Resolution Accuracy (of rdg) 5 – 999.9 rpm 0.1 rpm ±(0.05% + 1 digit) 1000 - 9999 rpm 1 rpm 10,000 - 99,990 rpm 10 rpm Extech sensors generate pulses that are counted by the meter and converted to RPM.
Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies to sensors and cables). If it should become necessary to return the instrument for service during or beyond the warranty period, contact the Customer Service Department at (781) 890-7440 ext. 210 for authorization or visit our website www.extech.com for contact information.
