Sper scientific 850015 User manual

PB 1
Graphic Display
Sound Meter
850015
Instruction Manual

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Graphic Display Sound Meter 850015
Copyright ©2015 by
Sper Scientic
ALL RIGHTS RESERVED
Printed in the USA
The contents of this manual may not be
reproduced or transmitted in any form or by any
means electronic, mechanical, or other means
that do not yet exist or may be developed,
including photocopying, recording, or any
information storage and retrieval system without
the express permission from Sper Scientic.

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TABLE OF CONTENTS
1. INTRODUCTION . . . . . . . . . . . . . . .4
2. FEATURES . . . . . . . . . . . . . . . . . .5
3. MATERIALS SUPPLIED . . . . . . . . . . .5
4. FRONT PANEL DESCRIPTION
& LCD DISPLAY . . . . . . . . . . . . . . .6
5. CALIBRATION . . . . . . . . . . . . . . . .8
6. MEASUREMENT PROCEDURES. . . . . .9
7. MAINTENANCE & STORAGE . . . . . . . 12
8. BATTERY REPLACEMENT . . . . . . . . 13
9. SPECIFICATIONS . . . . . . . . . . . . . 14
10. WARRANTY . . . . . . . . . . . . . . . . 16

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INTRODUCTION
This Sper Scientic Graphic Display Sound Level
Meter (Model 850015) provides fast and accurate
measurement in a wide range of environments.
Applications include safety engineering, health
environments, industrial settings, and o󰀩ce
engineering.
The meter features both a numerical digital display
and 30-segment bar graph for accuracy. AC
and DC signal outputs are available through the
standard 3.5 mm coaxial socket, allowing use of a
frequency analyzer, level recorder, FFT analyzer,
graphic recorder, and more.
Meets IEC 61672:2013 Class 2 frequency and
time weighting specications.

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FEATURES
• Analog and digital displays
• Minimum and maximum readings
• Peak hold
• Frequency weighting
• Level range control
• Visual alarm functions
• AC and DC output coaxial socket
• Windscreen
• Tripod mounting screw
• Low battery indicator
• Automatic shuto󰀨
MATERIALS SUPPLIED
• Meter
• One 9V Alkaline Battery
• Instruction Manual
• Windscreen for Microphone
• Hard Carrying Case

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FRONT PANEL DESCRIPTION & LCD DISPLAY

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1. Microphone & Windscreen
2. AC/DC Output Socket
3. Battery Cover (on back, not pictured)
4. Auto Power O󰀨 indicator
5. FAST/SLOW response indicator
6. MIN/MAX Value hold indicator
7. UNDER/OVER range indicator
8. Range indicator
9. Calibration Mode indicator
10. Reading indicator
11. Battery capacity indicator
12. A/C Weighting indicator
13. Power Button
14. Frequency weighting button
15. Min/Max button
16. Time weighting button
17. Increase level range button
18. Decrease level range button
FRONT PANEL DESCRIPTION & LCD DISPLAY

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CALIBRATION
The meter will arrive properly calibrated and
ready for use, and should keep it’s calibration for
a signicant period of time. The meter should be
recalibrated if:
• If the meter has not been used for a long time.
• If the meter has been operated in an
extreme environment.
Note...
You will need a standard acoustic calibrator
(94 dB, 1KHz Sine Wave) to recalibrate the
meter.
1. With the meter turned o󰀨, press and hold
down MIN/MAX.
2. While continuing to hold MIN/MAX, press
POWER to turn the meter on. “CAL 94dB”
will ash.
3. Insert the microphone carefully into
the calibrator.
4. Press ▲ or ▼ to adjust the reading until the
display shows 94 dB.
5. When the displayed reading correctly reects
the calibration point, press MIN/MAX to nish.
6. To exit the calibration process at any point,
press POWER to cancel the procedure. The
meter will return to Normal Mode.

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MEASUREMENT PROCEDURES
The meter may be held in the hand during
measurement or mounted using the tripod
mounting screw.
Note…
Wind blowing across the microphone may a󰀨ect
the readings. Mount the windscreen on the
microphone whenever the meter is used in a
windy environment.
1. Press POWER to turn the meter on.
2. Press FAST/SLOW to select the
response time.
a. Select FAST to measure short bursts
of sound.
b. Select SLOW to measure average
sound levels.
3. Press A/C to select the weighting.
a. Select A weighting for general sound level
measurements. “dBA” will display.
b. Select C weighting for measuring the
sound level of acoustic material and
checking the low-frequency content of
sound. “dBC” will display.
Note…
If the C-weighted sound level is much higher
than the A-weighted level, a large amount of low-
frequency sound is present.

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4. Press ▲ or ▼ to adjust the level range
as needed.
a. Press ▲to increase the level range from
low to medium to high.
b. Press ▼to decrease the level range from
high to medium to low.
Note…
During measurement, visual alarms will alert you
if the input is out of range. “OVER” indicates that
the sound input is above the upper limit of the
range. “UNDER” indicates that the sound input
is below the lower limit of the range.
5. Point the microphone in the direction of the
sound to be measured. The reading will
display.
6. Press and hold POWER for 2 seconds to turn
the meter o󰀨 when measurement is complete.
Peak Hold
Note…
Please select the appropriate sound level range
before entering the Peak Hold and Max/Min
recording modes.
1. Press MIN/MAX to display “MAX” along with
the maximum reading. When the maximum
sound level is exceeded the new maximum
reading will be displayed.
2. Press MIN/MAX again to display “MIN” along
with the minimum reading. The display will be
updated when a lower sound level is reached.