461895-EN V2.1 8/13
5
Operation
Photo Tachometer
1. Slide the Function Switch to the "rpm PHOTO" position.
2. Apply a 0.5” (12mm) square piece of reflective tape to the object being measured.
3. Press the Measure button and align the visible light beam with the object being
measured. Check that the Monitor Indicator switches on (upper left-hand corner of
LCD) when the reflective tape passes through the light beam. Release the Measure
button once the display stabilizes (approx. 2 seconds). For best results, hold the
meter's light source 6 -12 inches from the object being measured. For best results,
minimize the ambient light as much as possible.
4. If the RPM measurement is less than 50
,
apply additional squares of reflective tape
(equidistant). Divide the reading shown on the display by the number of reflective
squares to get the actual RPM.
NOTE:
Bright ambient light may interfere with the reflected light beam. Shading the
target area may be necessary in some cases.
CAUTION:
Rotating objects can be dangerous. Use extreme care when holding the
meter near any such object.
Contact Tachometer
1. Slide the Function Switch to the "rpm CONTACT" position.
2. Press the Measure button while lightly pressing the rotating ring against the center
opening of a rotating shaft. Release the Measure button once the display has
stabilized (approx. 2 seconds).
CAUTION:
Rotating objects can be dangerous. Use extreme care when holding the
meter near a rotating object.
