Clas Ohlson UT353 Instruction Manual

Sound level meter
Art. no. 36-9474 Model UT353
Please read the entire instruction manual before using the product
and then save it for future reference. We reserve the right for any
errors in text or images and any necessary changes made to
technical data. In the event of technical problems or other queries,
please contact our Customer Services Services.
Safety
• Never expose the product to high temperatures, dust,
powerful vibration, impacts, humidity or moisture.
• Do not put the product in a position where it could fall into
water or other liquid.
• Never try to open the casing. Repairs and service work
should be performed only by a qualified technician and only
using original spare parts.
• Do not let children play with the product.
Cleaning and maintenance
• The meter can be cleaned by wiping it with a dry cloth.
• If you are not going to use the meter for a long time, you
should remove the batteries and store it in a dry, dust-free
environment, out of the reach of children.
Specifications
1/2", condenser type
Microphone
Measurement range 30 – 130 dB
Frequency range 31.5 Hz – 8 kHz
Frequency weighting A (human hearing frequencies)
Accuracy ±1.5 dB
Display resolution 0.1 dB
Sampling time FAST 125 ms, SLOW 1000 ms
5 min
Battery saving function
Battery 3 × AAA/LR03
Size 150 × 52 × 27 mm
Weight 116 g (including batteries)
Environmental factors
Operating temperature 0 to +30°C (not over 80% RH)
+30 to +40°C (not over 80% RH)
+40 to +50°C (not over 45% RH)
Storage temperature –20 to +60°C (not over 80% RH)
Max. altitude ≤ 2000 m above sea level
Buttons and functions
1. Microphone with wind protection
2. Display
3. [ ] Press and hold to switch
the sound meter on/off
4. [ MAX/MIN ] Press repeatedly to
display the maximum, minimum
and current value.
5. [ FAST/SLOW ] Press to toggle
between FAST or SLOW
sampling time.
6. [ HOLD/BL ] Press to freeze/lock the
selected measurement. "HOLD" will
appear on the display. Press and hold
to switch the background light on/off.
Display
a) " MAX " Highest measurement
b) " MIN " Lowest measurement
c) " HOLD " Locked measurement
d) Battery status –
Low battery level
e) Measurement
f) " dBA " Measurement unit
g) " FAST " Fast sampling time
h) " SLOW " Slow sampling time
Using the product
Inserting the batteries
1. Remove the battery cover by sliding it in the direction of
the arrow and lifting it up.
2. Insert 3 × AAA/LR03 batteries. Check the markings in
the bottom of the battery compartment to make sure that
the polarity is correct.
3. Replace the battery cover.
Battery saving function (APO)
The meter automatically switches off 5 minutes after the last
button is pressed.
1
To switch the meter on without the battery saving function:
1. Check that the meter is switched off.
2. Press and hold [ HOLD/BL ] and then press [
"APO OFF" will appear on the display.
Removing the screen protector
2
Remove the screen protector from the display.
Important considerations when measuring sound
3 5
• Check that the microphone is aimed at the sound source
4 6
when taking a reading.
• Use FAST sampling to capture fast, brief transients such as
sudden sound spikes.
• Use SLOW sampling to get a more general profile of
the sound environment. You should opt for SLOW sampling
a b c d
when you are taking readings of continuous sound sources,
such as background noise.
• Taking measurements in strong winds can lead to false
e
readings. Check that the microphone's wind protection is
in place.
f
• If the sound level exceeds 230 dB, "OL" appears on
the display. At sound levels under 30 dB, "UN" appears.
Note: Risk of permanent hearing damage. Always wear ear
protectors/defenders when taking readings of high sound levels.
g h
Responsible disposal
This symbol indicates that the product should not
be disposed of with general household waste.
This applies throughout the entire EU. To prevent any
harm to the environment or health hazards caused by
incorrect waste disposal, the product must be hand-
ed in for recycling so that the materials can be dis-
posed of in a responsible way. To recycle the product,
take it to your local recycling facility or contact the retailer. They
will ensure that the product is disposed of in a way that does not
harm the environment.
English
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