Product Manual

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User's Manual

Model 461995

Laser Photo / Contact Tachometer

Introduction

Congratulations on your purchase of Extech's Laser Photo/Contact Tachometer, Model

461995. This Tachometer provides contact/non-contact RPM and Linear Surface Speed

measurements. The laser pointer beam provides accurate long distance measurements for

photo tachometer measurements. This meter, with proper care, will provide years of safe

reliable service.

Laser

Photo/ Contact

PHOTO CONTACT

min

rpm

MEMORY

461995

Tachometer

Summary of content (6 pages)

PAGE 1
User's Manual Model 461995 Laser Photo / Contact Tachometer Laser Photo/ Contact Tachometer 46 19 95 MEMORY rpm PHOTO CONTACT ft / min m/ min Introduction Congratulations on your purchase of Extech's Laser Photo/Contact Tachometer, Model 461995. This Tachometer provides contact/non-contact RPM and Linear Surface Speed measurements. The laser pointer beam provides accurate long distance measurements for photo tachometer measurements.
PAGE 2
Safety 1. Use extreme caution when the laser beam is on 2. Do not point the beam toward anyone's eye 3. Be careful not to let the beam strike the eye from a reflective surface 4. Do not use the laser near explosive gases or in other potentially explosive areas 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 on sensors and cables).
PAGE 3
Specifications General Specifications Circuit Custom one-chip LSI microprocessor circuit Time base Quartz crystal 4.194 MHz Display Reversible 5 digit 0.4" (10mm) LCD display Laser light source Less than 1mW; Class 2 red laser diode (645nm approx.) Detecting Distance 2 to 79" (50 to 2000 mm) depending on ambient light and RPM Memory Last reading and MIN/MAX readings Operating Conditions 32 °F to 122 °F (0 °C to 50 °C); RH 80% Max Power Supply 4 x 1.
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Meter Description 1. Photo Tachometer sensor and laser source 2. LCD display 3. MEMORY button 4. Function switch 5. Contact tachometer rotating ring 6. MEASURE button 7. Battery compartment (rear) 4 461995 V1.
PAGE 5
Meter Operation Reversible LCD Display The 461995 LCD display indicates Photo Tachometer measurements in one direction and Contact measurements in the opposite direction. This permits the user to easily read the measurement digits in both measurement modes with the meter held in either direction. Photo Tachometer Measurements (refer to diagram below) 1. Apply an appropriately sized square piece of reflective tape to the surface of the object under test. 2. Move the Function switch to the PHOTO position. 3.
PAGE 6
Contact Tachometer RPM Measurements 1. Move the Function switch to the CONTACT position. 2. Press the Measure button while lightly pressing the rotating ring against the center opening of a rotating shaft. 3. Release the Measure button when the display stabilizes (approx. 2 seconds). Linear Surface Speed (ft/min or m/min) Measurements 1. Slide the Function Switch to "SURFACE SPEED ft/min" or "m/min" position. 2. Install the surface speed attachment on the meter rotating ring. 3.