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SPECIFICATIONS EXTECH 461891: HIGH PRECISION CONTACT TACHOMETER
- General Specifications Extech 461891
Circuit: Custom one-chip LSI microprocessor circuit
Timebase: Quartz crystal
Display: 5-digit multi-function LCD display
Measurements: Rotation Speed 0.5 to 19,999 rpm; Surface Speed 0.2 to 6560 ft/min. 0.05 to 1999.9 m/min
Memory: Last and Max/Min readings
Extech 461891 Sampling Time: 1 second
Operating Temperature/RH: 32 °F to 122 °F (0 °C to 50 °C) / <80% RH
Power Supply: 4 x 1.5V AA batteries
Power Consumption: Approx. 10 mA
Weight: 0.62 lb (280 g) including batteries
Dimensions: 8.2 x 2.8 x1.5″ (208 x 72 x 37 mm)
Accessories: Cone rpm adaptor, funnel rpm adaptor, surface speed test wheel, and carrying case
- Range Specifications Extech 461891
— rpm
Range: 0.5 to 19,999 rpm
Resolution: 0.1 rpm (0.5 to 999.9 rpm); 1 rpm (over 1000 rpm)
Accuracy: + (0.05% rdg +1d) @23+ 5oC
— ft/min
Range: 0.2 to 6560 ft/min
Resolution: 0.1 ft/min (0.2 to 999.9 ft/min); 1 ft/min (over 1000 ft/min)
Accuracy: ± (1% rdg + 1 digit)
— m/min
Range: 0.05 to 1999.9 m/min
Resolution: 0.01 m/min (0.05 to 99.99 m/min); 0.1 m/min (over 100 m/min)
Accuracy: ± (1% rdg + 1 digit)
Introduction Extech 461891
Fast and accurate rpm and surface speed measurements to 20,000rpm
The 461891 is a contact Tachometer. Surface wheels measure contact surface speeds (10 to 9,999 rpm) of rotating objects. The memory button holds the last reading and recalls the min/max readings display. Complete with wheels for linear surface speed (0.2 to 6560 feet/minute; 0.05 to 1999.9 meters/minute) or RPM measurements. Comes with a cone tip, flat tip, and spare wheel for surface speed measurements, four AA batteries, a carrying case, and a user manual.
Features
– Built-in memory recalls the last MAX/MIN value stored
– Autoranging with 0.05% accuracy
– Contact measurements from 0.5 to 19,999rpm plus linear surface speed measures in ft/min or m/min
– Simply contact rotating object with sensor tip and read
– Accessory wheels enable the tachometer to measure linear surface speeds
– Complete with cone tip, flat tip, and spare wheel for surface speed measurements, four 1.5V AA batteries, and case
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