O P E R A T I N G I N S T R U C T I O N S
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Version 01/13
Digital Noise Level Meter SL-50
Item no. 10 05 93
Intended Use
The noise level meter is a digital measurement device for measuring the noise level in
units of decibel (dB).
The noise level meter is for measuring noise levels of sources in the intensity range 40
to 130 dB. It is an appliance for checking noise sources or for simple measurements
of environment noise.
The measurements and the instantaneous units/functions are shown digitally on the
large four-digit LC-Display (Liquid-Crystal-Display). In unfavourable light conditions
the display is illuminated automatically.
The measurement signal is sampled linearly (C-characteristic) with a fast measurement
speed of 125 ms which enables measurements in the frequency range of 30 Hz (Hertz)
to 4 KHz (kilo Hertz).
The maxima or minima can be recorded.
In order to suppress disturbing wind noise, an attachable wind deflector is enclosed,
which does not affect the noise level measurement.
A 9 V block battery (type 1604A) is required for operation.
Measurements must not be carried out under unfavourable ambient conditions.
Unfavourable ambient conditions are:
- Wet conditions or high air humidity
- Dust and flammable gases, vapours or solvent,
- Thunderstorms or similar conditions such as strong electrostatic fields etc.
Any use other than described above is not allowed and can damage the product.
No part of the product may be modified or rebuilt!
The safety instructions must be observed thoroughly!
Safety and Hazard Notices
An exclamation mark in a triangle indicates that there are important
instructions in the operating instructions. Please read all the in-
structions before using this device, they include important informa-
tion on its correct operation.
This product is CE compliant and thus fulfils the necessary guide -
lines.
• The guarantee is rendered invalid when damage occurs as a result of non-compliance
with the operating instructions! We do not assume any liability for any damage arising
as a consequence!
• We do not assume any liability for material and personal damage caused by improper
use or non-compliance with the safety instructions. The warranty is voided in these cases.
• The unauthorized conversion and/or modification of the product is not allowed for ap-
proval reasons.
• Please make sure that you operate the device properly. Please follow these operating
instructions.
• The housing may not be disassembled, except for opening the battery compartment
cover.
• The meter and accessories are not toys and must be kept out of the hands of children!
• In commercial and industrial facilities the regulations for the prevention of accidents as
laid down by the professional trade association for electrical equipment and devices
must be observed.
• In schools, training centres, computer and self-help workshops, use of the meter must
be supervised by trained personnel in a responsible manner.
• Do not switch the meter on immediately after it has been taken from a cold in to a
warm environment. Condensation that forms might destroy your device. Allow the de-
vice to reach room temperature before switching it on.
• Do not carelessly leave the packaging material lying around since this may become
a dangerous toy for children.
Description of individual parts
1 Measurement microphone
2 On/Off switch
3 Light sensor for display illumination
4 Display
5 MAX/MIN button
6 Tripod socket
7 Battery compartment
8 Wind deflector
Inserting/Replacing the Battery
A 9 V block battery (e.g. type IEC 6F22) is required for operation.
To insert/replace the battery, proceed as follows:
• Push the cover on the back in the direction of the arrow on the appliance and remove
the cover.
• Connect the new battery, with the correct polarity with the battery-clip and push the
cover on the appliance again.
It is necessary to change the battery ( ) when the display can no longer be read
properly or when the appliance cannot be switched on anymore.
In order to avoid damage to the appliance from leaking batteries, re-
move the battery from the appliance when you do not use the appli-
ance for a long time. For the same reason it is advisable to take out
empty batteries immediately.
Do not leave batteries lying around carelessly. They might be swal-
lowed by children or pets. If swallowed, consult a doctor immediately.
Batteries may not be charged, shorted or thrown into fire. There is a
danger of explosion.
Leaking or damaged batteries may cause alkali burns if they come in
contact with the skin. Therefore, use suitable protective gloves.
Make sure that the batteries are not short-circuited. Do not throw bat-
teries into fire!
☞
A compatible alkaline battery can be obtained with the following purchase
number:
Item no. 65 25 09 (please order one).
Only use alkaline batteries, since these are powerful and have a long life.
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