Specifications - Extech Instruments 461891 User Manual

Introduction
Congratulations on your purchase of Extech's Digital Tachometer. This professional meter,
with proper care, will provide years of safe reliable service.

Specifications

General Specifications
Circuit
Time base
Display
Measurements
Memory
Sampling Time
Operating Temperature/RH
Power Supply
Power Consumption
Weight
Dimensions
Accessories
Range Specifications
Range
rpm 0.5 to 19,999 rpm
ft/min 0.2 to 6560 ft/min
m/min 0.05 to 1999.9 m/min 0.01 m/min (0.05 to 99.99 m/min)
Custom one-chip LSI microprocessor circuit
Quartz crystal
5-digit multi function LCD display
Rotation Speed 0.5 to 19,999 rpm
Surface Speed 0.2 to 6560 ft/min.
0.05 to 1999.9 m/min
Last and Max/Min readings
1 second
32 °F to 122 °F (0 °C to 50 °C) / <80% RH
4 x 1.5V AA batteries
Approx. 10 mA
0.62 lb (280 g) including batteries
8.2 x 2.8 x1.5" (208 x 72 x 37 mm)
Cone rpm adaptor, funnel rpm adaptor, surface speed
test wheel, and carrying case
Resolution
0.1 rpm (0.5 to 999.9 rpm)
1 rpm (over 1000 rpm)
0.1 ft/min (0.2 to 999.9 ft/min)
1 ft/min (over 1000 ft/min)
0.1 m/min (over 100 m/min)
2
Accuracy
+ (0.05% rdg +1d)
@23+ 5 o C
± (1% rdg + 1 digit)
461891 Ver. 1.9 7/02