Manual
6
5
Instructions
5.1
How to perform a measurement
1. Press the ON/OFF button (1.6) to turn on the device.
2. Use the function button (1.4) to choose the desired measuring mode.
L
P
Current sound pressure level
L
eq
Equivalent continuous A-weighted sound pressure level, i.e. arithmetic mean value
in a period of time set
L
N
Statistic analysis, i.e. what percentage of all measurement values is larger than or
equal to the alarm value set by the user. For setting the alarm value , please read
chapter 5.4
3. Use the weighting button (1.8) to change the frequency weighting.
A
The frequency response of the meter is similar to the response of the human ear.
This setting is commonly used for environmental or hearing conservation programs
such as OSHA regulatory testing and noise ordinances.
C
This weighting is a much flatter response and is suitable for the sound level
analysis of machines, engines, etc.
Flat
Choose this if you do not need frequency weighting.
Note:
When the measuring mode L
eq
is active, A weighting is set automatically.
4. Use the Fast / slow button (1.9) to change the time weighting.
Fast
125 ms
– Choose this setting when you need to measure noises which appear very
quickly or abruptly.
Slow
1 second
– Choose this setting if you want to determine a mean value or measure
sources with a steady sound pressure level.
Note:
Slow weighting is adequate for most applications.
5. Press the MAX HOLD button (1.5) to activate the display hold of the maximum value. The device
now shows only the particular maximum value on the display. Press the button again to
deactivate this function.
5.2
Memory options
1. Press the save button (1.10) to save the current reading.
2. Press the read button to re
trieve the saved data. The “M” icon disappears and the “R” icon
appears on the display. Now you can choose between the saved readings by using the save
(1.10) and the read (1.11) buttons.
3. Press the delete button (1.7) while you are in read mode to delete the selected value. If you
delete all saved readings, an “Err0” notification appears on the display. This means that the
memory is empty.
5.3
L
eq
measurements
By using the L
eq
measuring mode, you can perform RMS average noise level measurements over a pre-
set period of time.
1. Press and hold the delete / menu button (1.7) for about 8 seconds until the L
eq
indication appears
on the display.
2. Use the up (1.10) and down (1.11) buttons to set the time. You can choose between 10 s, 1 min,
5 min, 10 min, 15 min, 30 min, 1 h, 8 h or 24 h.
3. To exit this menu, press any button but the up or down button.
