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Dosímetros acústicos de ruido datalogger 407355 EXTECH manual ingles www.viaindustrial.com
REAL TIME CLOCK
Press the CLOCK key to display the current Day and Time accompanied by the TIME icon
blinking. Note that the DATE and TIME settings are saved when the meter is turned off. To set the
TIME and DATE refer to the Programming section.
Manual Programming
NOTE: The meter can be automatically programmed using the supplied software. Refer to the PC
interface sections for details. Specifically, the OCCUPATIONAL NOISE EXPOSURE STANDARD
software window can be used to configure the meter with one click of the mouse. To Manually
Program the meter, follow these steps:
1. To access the programming mode, start with the 407355 power off.
2. Press and hold the
3. Release the RESET button when SEP (Setting Parameters) appears.
4. Use the left
and right
5. Use the up
and down
6. Refer to the parameter display symbols and their definitions below. These parameters are
discussed throughout this manual
LC
(Criterion Level): 80, 84, 85, 90dB selections
LT
(Threshold Level): 70 to 90dB selectable in 1dB steps
ER
(Exchange Rate): 3, 4, 5, and 6 dB selections
20
First two digits of calendar year
04
Last two digits of calendar year
Calendar Month
0_7_
Day of the Month
0_8_
Hour of the day
0_3_
Minutes
37
S F
Slow (1 second) and Fast (125ms) response time settings
7. Press the
button to exit the programming mode. Changes made in the programming mode
will be saved upon exiting. Note that settings are not lost when the meter is turned off.
Calibration Procedure
Note that an acoustical calibrator (such as the Extech 407744 or 407766) is required to calibrate the
407355. Extech Instruments can also calibrate the instrument and provide an N.I.S.T. certificate if
desired.
1. Set the instrument to the Sound Level Measurement Mode (dBA) using the MODE button.
2. Set the response time to SLOW (see the Programming section)
3. Insert the 407355 microphone into the microphone cavity of the calibrator.
4. Turn the calibrator ON and adjust the CAL screw on the 407355 so that the LCD display
matches the calibrator output signal (94dB typically).
5. Calibration should be performed before each use.
Dosímetros acústicos de ruido datalogger 407355 EXTECH manual ingles www.viaindustrial.com
(RESET) button while turning the instrument on.
arrow buttons to select the desired parameter
arrow buttons to change a parameter's setting
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