Sper scientific 850014 User manual

Mini Sound Meter
850014
Instruction Manual

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TABLE OF CONTENTS
1. INTRODUCTION . . . . . . . . . . . 2
2. PANEL DESCRIPTION. . . . . . . . 3
3. OPERATING INSTRUCTIONS . . . . 4
3-A. Measuring Procedures . . . . . . 4
3-B. Hold Function . . . . . . . . . . 5
3-C. Min/Max Function . . . . . . . . 5
3-D. Calibration . . . . . . . . . . . . 6
4. AUTO POWER OFF . . . . . . . . . . 6
5. SPECIFICATIONS. . . . . . . . . . . 7
6. OPTIONAL ACCESSORIES. . . . . . 8
7. WARRANTY . . . . . . . . . . . . . . 8
1. INTRODUCTION
This lightweight and compact unit features
1/2" Electret condenser microphone, A and
C decibel frequency weighting scales, fast
or slow response time weightings, max/min,
hold and a backlight. Meets IEC 61672:2013
Class 2 frequency and time weighting
specications. Includes a windscreen,
instructions, and a 9V battery. CE rated.

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1.Windscreen
2. Microphone
(remove
windscreen
to expose the
microphone tip)
3. LCD Display
4. A/C (weighting)
5. Hold
6. Fast/Slow
(response)
7. Backlight
8. Max/Min
9. Power
10. Battery
Compartment
(on back)
2. PANEL DESCRIPTION

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3. OPERATING INSTRUCTIONS
Keep the microphone dry and avoid strong
vibrations. Use the WINDSCREEN (1) at wind
speeds over 10m/sec.
3-A. MEASURING PROCEDURE
• Turn the meter on by pressing the POWER (9)
button. The meter defaults to the A frequency
and FAST response.
• Press the A/C (4) button to toggle between
frequency scales. The A scale is shown as
“dBA” and the C scale is shown as “dBC”.
Select the A scale to simulate the human ear’s
response. A is generally used for environmental
measurements. The C scale approximates a
at response and is typically used to measure
low-frequency machinery noise where the
target sound level is already known.
• Press the FAST/SLOW (6) button to toggle
between response-time scales. Select FAST
for general applications and SLOW to check the
avg. level of uctuating noise, like machinery.
• Point the MICROPHONE (2) at the sound
source. The decibel level is displayed.
• Press the BACKLIGHT (7) button to turn
on/o󰀨 the illuminated display. The backlight
auto-matically turns o󰀨 after 15 seconds.
• Press the POWER (9) button to turn the meter o󰀨.

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3-B. HOLD FUNCTION
With the meter on, press the HOLD (5) button
to display “HOLD” and the last dB reading.
Press HOLD (5) again to exit this function.
3-C. MAX/MIN FUNCTION
The Max/Min dB readings are continually updated
as soon as you enter the Min/Max function.
These readings are reset when you exit the Max/
Min function, or when the meter is turned o󰀨.
• With the meter on, press the MAX/MIN (8)
button once to display “MIN” and the minimum
recorded dB level. The display will be updated
when there is a lower dB reading.
• Press the MAX/MIN (8) button again to display
“MAX” and the maximum (peak) recorded dB
level. The display will be updated only when the
max (peak) dB level is exceeded.
• To exit this function, press and hold the
MAX/MIN (8) button for at least 2 seconds, then
release. The current dB reading is displayed.
NOTE: When the meter is rst turned on, there
may be a dB “spike” that could inuence the
maximum (peak) reading. To ensure accuracy,
enter and exit the MAX/MIN function once to
reset the recorded dB levels.

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3-D. CALIBRATION
Use Sper Scientic Acoustical Calibrator
850016 (or equivalent) to calibrate the meter.
Perform the calibration at temperatures
between 58-78°F (15-25°C). The calibrator
and meter should be at the same temperature.
• Remove the WINDSCREEN (1) and
turn on the meter by pressing the
POWER (9) button.
• Turn the acoustical calibrator on to 94.0 dB
and place it onto the MICROPHONE (2).
• With the meter in FAST response mode
and A (dBA) weighting, press and hold the
A/C (4) button.
• Without releasing the A/C (4) button,
press and hold the HOLD (5) button.
The display will go blank.
• Release both buttons and “94.0” ± 0.2
is displayed.
• The calibration process can be repeated
until the meter reads the desired value.
• This completes the calibration process.
4. AUTO POWER OFF
If no buttons are pushed for about 3 minutes,
the meter will automatically turn o󰀨.

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5. BATTERY REPLACEMENT
• Turn o󰀨 the meter when the
low battery icon is displayed.
• Slide BATTERY COMPARTMENT (10)
cover down to install a fresh 9V battery.
• Replace the cover.
• Expected battery life is about 50 hrs.
6. SPECIFICATIONS
+
Display 3/4” high digits, 4-digit LCD,
display updates every 0.5 seconds.
Range dynamic range: 50dB
auto-ranging: 30-130d B
A (dBA) weighting: 30-130dB
C (dBC) weighting: 35-130dB
Resolution 0.1dB
Accuracy ±1.5dB
Frequency 31.5 HZ - 8KHZ
Response Fast = 125mS, Slow =1 sec
Operating
Environ.
41-104°F (5-40°C) <80% RH &
up to 2000m above sea level
Storage
Environ.
13-140°F (-10°C-60°C)
& < 70%RH
Weight &
Dimension
6 oz (170 g)
8" x 2⅛" x 1½”, 200 x 55 x 38 mm

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7. OPTIONAL ACCESSORIES
850016 Acoustical Calibrator
840091 Windscreen
850000 Rubber Boot
8. WARRANTY
Sper Scientic warrants this product against
defects in materials and workmanship for
ve (5) years from the date of purchase, and
agrees to repair or replace any defective unit
without charge. If your model has since been
discontinued, an equivalent Sper Scientic
product will be substituted if available. This
warranty does not cover damage resulting from
accident, misuse, or abuse of the product.
To obtain warranty service, ship
the unit postage prepaid to:
SPER SCIENTIFIC LTD.
8281 East Evans Road, Suite #103
Scottsdale, AZ 85260
The defective unit must be accompanied by
a description of the problem and your return
address. Register your product online at
www.sperwarranty.com within 10 days
of purchase.
rev 2/22/2018