Product Manual

407730-en-EU_V1.9 7/14
4
MAX/MIN Recording
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.
Auto-Power Off
The meter will automatically shut off after 20 minutes of operation. To disable this feature:
1. With the meter OFF, Press the and MAX HOLD buttons simultaneously.
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.
Calibration
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
Battery Replacement
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
Tripod Mount
A camera tripod mount is located on the rear of the meter for increased stability and elimination of
body reflections.