
4 407355 Ver. 1.02 9/99
6. OPERATING INSTRUCTIONS
6. 1 Meter Power
Power the meter by pressing the green POWER key, all of the display annunciators will
appear briefly and the default configuration values will appear one by one. The main
display screen will then appear. If the meter does not power correctly, check the batteries.
To remove meter power, press and hold the green POWER key until the meter counts
down (3, 2, 1, 0) and powers OFF.
6.2 Operation Modes
Press the MODE key to select or change the mode of operation (%DOSE, Sound Level in
dBA, or TIME). The following is a list of Display and Measurement Modes:
Instantaneous Sound Level (dBA)
Measuring range is 70 to 140dBA. For Sound Level measurements < 68dBA the LCD
will display dashed lines. For readings > 115dBA, the High Level Alert icon appears.
For readings > 140dBA, the Peak Detector icon appears (see the DISPLAY section
above for icon identification).
Noise Exposure period measurements (DOSE)
1. Use the Mode selection key to choose DOSE.
2. Select an unused Event Register (E1 through E5). Refer to the Event Select
explanation below.
3. Press the RUN key to begin measuring accumulated noise exposure.
4. The LCD will show % DOSE and the clock icons.
5. To stop measurement, press and hold the RUN key for 3 seconds. The
measurement session will end and the clock icon will disappear.
Elapsed DOSE Measurements (TIME)
To view Elapsed Time (since measurement began), press the MODE key until the
TIME icon appears on the LCD. The LCD will display hours and minutes. You can
switch between TIME and DOSE displays at anytime. NOTE: When the RUN key is
pressed, the previous DOSE measurement will be cleared.
Pause / Continue
When the RUN key is pressed, noise exposure measurements are held and the Pause
indicator appears. To resume (continue) basic meter operation, press the RUN key
again.
Event Select
Press the EVENT key to enter the EVENT mode. Each time the EVENT key is pressed
the LCD increments the Event register (E1 through E5). Each register is a memory
location. You can store and write over the data in any of these locations. Each register
location (E1, for example) is displayed on the LCD along with the stored data. If data is
present in a register location, the location ID blinks. To erase data in a memory
location, press the RESET key. Press the EVENT key to scroll through the registers
(the last scroll turns off the EVENT function).
Real Time Clock
Press the CLOCK key to display the current Day and Time accompanied by the TIME
icon blinking. Date and time data is stored with each memory reading. The instrument
has a battery back-up utility so that data and time information is not lost upon Power
down.
6.3 Running a Noise Exposure Test
1. Fit the meter to the user via the microphone clip and the belt clip. The microphone
must be clipped as close to the user’s ear as possible for best results.
2. Press the RUN key, the meter will begin to accumulate noise exposure.
3. Run the tests over a period of a few days to obtain better averaged data.
4. At the end of the test, press and hold the RUN key for 3 seconds.
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