461700 Datasheet, PDF (2/7 Pages) Extech Instruments Corporation. – Mini Photo Tachometer

Introduction
Congratulations on your purchase of the Extech Tachometer.
The Model 461700 Photo Tachometer uses precision optics and reflective tape to
measure the RPM of rotating devices such as fans and gears.
The Model 461750 Contact Tachometer uses convex and concave attachments to
measure RPM. It also has a built-in wheel to measure the linear surface speed of moving
devices such as conveyors and treadmills. Careful use of this tachometer will provide
years of reliable service.
Specifications
General Specifications
Display
Range selection
Time Base
Sampling Time
Photo Tachometer Distance
Operating Temperature
Operating Humidity
Power supply
Battery Life
Applicable standards
Dimensions
Weight
5-digit LCD Display
Automatic range selection
4MHz Quartz Crystal
1 second (>60 rpm); >1 second (10 to 60 rpm)
2 to 12” (5 to 30cm)
32 to 122^oF (0 to 50^oC)
80% RH Max.
9V Battery
40 hours (approx.)
EN 50081-1/1992 (EN 55022)
EN 50082-1/1997 (EN 55024)
461700: 4.9 x 2.0 x 1.3” (124 x 51 x 33mm)
461750: 5.9 x 2.0 x 1.3” (150 x 51 x 33mm)
461700: 4.0 oz. (114g); 461750: 5.0 oz. (142g)
Range Specifications
Measurement
Rotation
(461700 Photo)
Rotation
(461750 Contact)
Surface Speed
(461750)
Range
10.000 to 99999 rpm
10.000 to 9999 rpm
3.0000 to 6560.0 ft/min
1.0000 to 1999.9 m/min
1.0000 to 5000.0 yds/min
Accuracy
± (0.1% reading + 2 digits)
± (0.1% reading + 2 digits)
± (1.5% reading + 2digits)
2
461700 / 461750 Version 2.3 Mar 2004