Operation - Extech Instruments 461830 User Manual

Operation

Powering the instrument
Speed (RPM) Measurements
Range Adjustments
Visually inspecting a moving object (stop-motion)
Important note on Test Durations
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1. Plug the supplied power cable into the instrument
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.
1. Remove power to the device under test so that it is stationary.
2. Affix a mark or place a small piece of the tape on the device under test.
3. P
4.
5. Read the RPM value on the LED display.
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.
When the speed of the moving object matches the flash rate of the stroboscope, the moving object
appears still. Measure the speed of a moving object as described in the previous sections to obtain
a stop-motion. Once stop-motion is achieved, the FINE adjust knob is used to vary the viewing
perspective of the object under test for visual inspection.
The Xenon lamp used in this instrument has time restrictions on usage. If the specified test times
and cool-off periods (shown in the table below) are not observed, damage to the instrument can
result and the life span of the lamp can be shortened.
RPM
< 3,000 rpm
> 3,000 rpm
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power cable jack.
Max. Operating Time Cool-Off Time
30 minutes
10 minutes
5 minutes
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