461893-EN V1.4 8/13
2
Introduction
Congratulations on your purchase of the Extech 461893 Photo Tachometer. This device provides
non-contact measurements over a wide range (5 to 100,000 RPM). A reflective mark on the object
to be measured is used as a target for the meter's integral light beam. Careful use of this meter will
provide years of reliable service.
Specifications
General Specifications
Meter circuitry
Custom one-chip LSI microprocessor
Time base
Quartz crystal
Display
5-digit (99999 count) 0.4" (10mm) multi-function LCD
Measurement
5 to 99,999 RPM in 2 ranges
Range select
Automatic
Data Recording
LAST / MIN / MAX readings stored for later recall
Sampling time
1 second (over 60 rpm)
Target distance
2 to 6" (50 to 150mm) depending on ambient light
Operating Temperature
32°F to 122°F (0°C to 50°C)
Power Supply
4 x 1.5V 'AA' batteries
Power Consumption
Approximately 150 mA
Weight
8.8 oz. (250 g) including battery
Size
6.7 x 2.8 x1.5" (170 x 72 x 37mm)
Accessories
Reflective tape (23") and carrying case
Range Specifications
Measurement
Range
Resolution
Accuracy
RPM
5 to 999.9 RPM
1,000 to 99,999 RPM
0.1 RPM
1 RPM
+(0.05% + 1 digit)
+(0.05% + 1 digit)
www.
.com
1.800.561.8187
