461700 Datasheet, PDF (4/7 Pages) Extech Instruments Corporation. – Mini Photo Tachometer

461750 Safety Precautions
The 461750 incorporates a finger guard for protection. However, care should be taken
when measuring surface speed to avoid injury.
1. Hold the meter firmly when touching the wheel or attachment to a moving object
2. Keep fingers behind the finger guard while taking measurements
3. Keep your eyes and attention on the measurement activity at all times
4. Do not attempt to record measurements while holding the meter to the moving object
(use the Data Hold feature to freeze the reading on the LCD; refer to the Data Hold
section of this manual).
Meter Power
Power ON / OFF
1. Press the triangular POWER HOLD button to turn the device ON. Alternatively, press
the button at the bottom of the meter (just under the LCD) which doubles as a power
on/off button. Two buttons are provided for easy reach at any holding angle.
2. Press and hold the triangular POWER HOLD button (or the alternate button) for
approx. 5 seconds to turn the device OFF.
Auto Power OFF
1. The meter turns off AUTOMATICALLY after 20 minutes.
2. For 461750 only: To disable this feature, turn the meter off. Then press and hold the
POWER and UNITS buttons until the meter turns on. Release the POWER button first
and the ‘n’ display icon will appear. This indicates that the feature is disabled.
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461700 / 461750 Version 2.3 Mar 2004