Digital Sound Level Meter; Operating Elements And Connections; Important Notes; Operation - Monacor SM-2 Instruction Manual

Digital Sound Level Meter

These instructions are intended for users with basic
knowledge of audio technology . Please read the
instructions carefully prior to operation and keep
them for later reference . All operating elements
and connections described can be found on the
fold-out page 3 .

1 Operating Elements and Connections

1 Measuring microphone with windshield
2 Display
3 Key Lo / Hi for selecting the range
lower range 35 – 100 dB = basic setting after
switching on; on the left side of the display
"Lo" (low) is indicated
upper range 65 – 130 dB; on the left side of
the display "Hi" (high) is indicated
4 Key S / F for selecting the dynamic measuring
mode for sound levels changing fast (basic
setting; on the right side of the display "F" is
indicated) and for sound levels changing slowly
(indication "S")
5 Trimming control for calibrating the indication
to 94 dB; for this purpose, set the sliding switch
(9) to the position "CAL"
6 Key MAX for switching on or off the measure-
ment of the maximum level; with the function
switched on, "MAX HOLD" is indicated at the
left top of the display
7 3 .5 mm jack, output for the amplified micro-
phone volt age and a DC voltage proportional
to level (see chapter 5 .1)
8 Key HOLD for holding the present value meas-
ured; with the function switched on, "DATA
HOLD" is shown at the top of the display
9 Sliding switch
OFF = meter switched off
A = weighting filter switched on; the meas-
urement corresponds to the auditory
sensation of the human ear
C = filter switched off; the measurement
corresponds to the physical sound level
CAL = calibration of the indication to 94 dB
with the trimming control (5)
10 Threaded jack (6 .3 mm / ¼") for mounting the
meter on a stand
11 Battery compartment cover
6

2 Important Notes

The device corresponds to all relevant directives of
the EU and is therefore marked with
The device corresponds to the relevant UK legisla-
tion and is therefore marked with UKCA .
•
The meter is suitable for indoor use only . Protect
it against dripping water and splash water, high
air humidity, and heat (admissible ambient tem-
perature range 0 – 40 °C) .
•
For cleaning only use a dry, soft cloth; never use
chemicals or water .
•
No guarantee claims for the device and no liabil-
ity for any resulting personal damage or material
damage will be accepted if the device is used for
other purposes than originally intended, if it is
not correctly con nected, operated or not repaired
in an expert way .
If the device is to be put out of opera-
tion definitively, dispose of the device in
accordance with local regulations .
3 Applications
The SM-2 serves for sound level measurement .
The meter allows to determine e . g . the frequency
response of an audio system, the efficiency and the
sound radiation of speakers, or the noise level in
rooms . For taking into account the auditory sen-
sation of the human ear, a weighting filter can be
switched on .

4 Operation

1) Switch on the meter with the sliding switch (9)
[position "A", "C", or "CAL"] .
2) An indication is displayed (2) . If not, insert a 9 V
battery . For this purpose, remove the battery
compartment cover (11) . Connect the battery
contacts to the battery, insert the battery in the
compartment, then close the cover .
If "BAT" is displayed at the left bottom, the
battery is exhausted and must be replaced .
Never put batteries in the household
waste . Always dispose of the batteries
in accordance with local regulations .
3) For mounting the device on a stand, the threaded
jack (6 .3 mm / ¼") [10] can be used .
4) Always switch off the device after operation,
otherwise the battery will be consumed unnec-
.