Max/Min Recording; Auto-Power Off; Calibration; Battery Replacement - Extech Instruments 407730 User Manual

MAX/MIN Recording

Auto-Power Off

Calibration

Battery Replacement

Tripod Mount

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In this mode the meter records the Maximum and Minimum readings and stores them into memory.
1. Press the REC button to enter the RECORD mode. The REC icon will appear in the display.
2. Press the REC button again to display the minimum value recorded since the mode was entered.
The MIN icon will appear in the display. The meter is not recording during this time.
3. Press the REC button again to display the maximum value recorded since the mode was entered.
The MAX icon will appear in the display. The meter is not recording during this time.
4. Press the REC button again to display the present dB level and continue recording.
5. Press and hold the REC button until the REC icon clears to exit the mode.
The meter will automatically shut off after 20 minutes of operation. To disable this feature:
1. With the meter OFF, Press the
2. will appear in the display
3. Release the button and then release the MAX HOLD button.
4. The meter will remain on until the power button is pressed.
To calibrate the meter, an external calibrator such as the Extech 407744 or the Extech 407766 is
required in addition to a small screw-driver.
1. Turn the meter ON
2. Select the 80 to 110dB range
3. Select A weighting and SLOW response
4. Place the microphone into the calibrator. Set the calibrator to output a 1kHz sine wave @ 94dB
5. Adjust the calibration potentiometer for a display as close as possible to the calibrator s output
When the low battery icon appear replace the battery by removing the screw securing the rear
battery compartment and replacing the 4 AAA batteries.
You, as the end user, are legally bound (Battery ordinance) to return all used batteries
and accumulators; disposal in the household garbage is prohibited!
You can hand over your used batteries / accumulators at collection points in your
community or wherever batteries / accumulators are sold!
Disposal: Follow the valid legal stipulations in respect of the disposal of the device at the
end of its lifecycle
A camera tripod mount is located on the rear of the meter for increased stability and elimination of
body reflections.
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and MAX HOLD buttons simultaneously.
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