This manual introduces the use of the Extech 461893 Digital Photo Tachometer. This instrument can be used to measure the speed of DC or AC motors.
The Extech Model 461893 is a digital photo tachometer designed for non-contact RPM measurements ranging from 5 to 100,000. It utilizes a reflective mark on the target object and an integral light beam to determine rotational speed. The device features a 5-digit LCD display and includes memory functions to store Last, Minimum, and Maximum readings.
| Measurement Range | 5 to 99,999 RPM |
|---|---|
| Target Distance | 2 to 6" (50 to 150mm) |
| Sampling Time | 1 second |
| Power Supply | 4 x 1.5V 'AA' batteries |
| Weight | 8.8 oz. (250 g) |
| Operating Temperature | 32°F to 122°F (0°C to 50°C) |
The instrument is warranted to be free of defects in parts and workmanship for one year from the date of shipment.
Press and hold the Memory record button to cycle through Last, Maximum, and Minimum readings.
The low battery indication appears as "LO" on the display.