407355 Datasheet, PDF (7/17 Pages) Extech Instruments Corporation. – Noise Dosimeter with PC Interface

PEAK FLAG
When sound levels above 140dB are present the meter displays the PK symbol
HIGH LEVEL INDICATOR
When sound levels above 115dB are present the meter displays the headphone
symbol
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 (RESET) button while turning the instrument on.
3. Release the RESET button when SEP (Setting Parameters) appears.
4. Use the left and right arrow buttons to select the desired parameter
5. Use the up and down arrow buttons to change a parameter’s setting
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
0_7_
Calendar Month
0_8_
Day of the Month
0_3_
Hour of the day
37
Minutes
SF
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.
7
407355 Version 2.4 9/07