Sper Scientific 850014 User Manual

Mini Sound Meter

850014

Instruction Manual

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. Reference to IEC651
and ANSI S1.4 standards for a type 2 sound
meter. Includes a windscreen, instructions,
and a 9V battery. CE rated.

2

2. PANEL DESCRIPTION

3

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)

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/off the illuminated display. The backlight
auto-matically turns off after 15 seconds.

• Press the POWER (9) button to turn the meter off.

4

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 the meter is turned on. These
readings are reset when you exit the Max/Min
function, or when the meter is turned off.

• 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.

5

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 off.

6

5. BATTERY REPLACEMENT

+

• Turn off 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.

Storage
Environ.

Weight &
Dimension

41~104°F (5~40°C) <80% RH &
up to 2000m above sea level

13~140°F (-10°C~60°C)
& < 70%RH

6 oz (170 g)

8" x 2⅛" x 1½”, 200 x 55 x 38 mm

7

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.sperscientic.com, or return your

warranty card within 10 days of purchase.

REV 07/11/13

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