Operation
Powering the instrument
1. Plug the supplied power cable into the instrument’s power cable jack.
2. Plug the other end of the cable into an appropriate AC power source. The Model
461830 requires 110VAC and the 461831 requires 220VAC. Do not plug the device
into an incorrect power source otherwise damage to the instrument will result.
3. Use the ON/OFF switch to turn the instrument on or off.
Speed (RPM) Measurements
1. Remove power to the device under test so that it is stationary.
2. Affix a reflective mark or place a small piece of the supplied reflective tape on the
device under test.
3. Point the Stroboscope’s beam toward the reflective mark.
4. Use the ‘FINE’ and ‘COARSE’ adjustment knobs to synchronize or "stop" the motion of
the reflective mark (read the ‘Display Notes’ section below).
5. Read the RPM value on the LED display.
Range Adjustments
1. While measuring, use the RANGE button to select the range as desired
2. The LOW range is used for measurements below 1,000 RPM. The HIGH range is used
for measurements above 1,000 RPM.
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Model 461830/461831 Version 2.2 November 2003
EXTECH [ EXTECH INSTRUMENTS CORPORATION. ]
