User's Guide
MultiMeter Tachometer Adapter
Model 461900
•
RPM Measurements to 19, 990
•
Connects to any standard DMM
•
Portable, Battery Operated
•
Up to 12” measurement distances
Introduction
Congratulations on your purchase of Extech’s Tachometer Adapter. This professional device,
with proper care, will provide years of safe reliable service.
Specifications
Measurement Range
Range A: 100 to 1999 RPM; Range B: 1000 to 19990
Resolution
1 or 10 RPM depending upon range
Adapter Output
0.1mVDC per 1 RPM in Range A; 10 RPM in Range B
Accuracy
± (1.2% + 2 digits)
Detection distance
2 to 6" (50 to 150mm);
12" (300mm) distances possible with low ambient light
Power Supply
Four 1.5V 'AA" batteries (UM-3 or equivalent)
Dimensions/Weight
6.7x2.8x1.5" (170x72x37mm); 0.55 lbs. (250g)
