This is a user's guide for Extech's Combination Photo-Tachometer Stroboscope 461825, which introduces how to use the product.
The Extech Model 461825 is a professional meter designed to provide safe and reliable service as both a tachometer and a stroboscope. The device features an LCD display, fine and coarse adjustment knobs, and a range/function select switch to facilitate speed measurements on moving objects.
| Measurement units | RPM (revolutions or rotations per minute) |
|---|---|
| Operating Temperature | 32 to 122°F (0 to 50°C) |
| Power Supply | Four 1.5V 'AA' batteries |
| Weight | 0.66 lb. (300g) |
| Tachometer Measurement Range | 5 to 99,999 RPM |
| Stroboscopic Flash rate | 100 to 100,000 FPM |
| Accuracy | ± (0.1% + 2 digits) |
Adjust the FINE/COARSE knobs until two images appear, then lower the flash rate until a single stationary image appears.
Press the Memory Recall button again after displaying the last reading; 'UP' will alternate with the data to indicate the Max. reading.
The typical detection distance is 2 to 6 inches (50 to 150mm), though up to 12 inches may be possible depending on ambient light.