MRC SL-4012 Operation Manual
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MRC SL-4012 Operation Manual

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SOUND LEVEL
METER
OPERATION MANUAL
Model : SL-4012
Your
purchase
SOUND
LEVEL
marks a step forward for
you
into
the
precision measurement.
Although this METER is a
complex
and
instrument,
its
structure will allow many
years of use if proper
operating techniques are
developed.
Please
the following instructions
carefully and always keep
this manual within easy
reach.
of
this
METER
field
of
delicate
durable
read

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Summary of Contents for MRC SL-4012

  • Page 1 SOUND LEVEL METER Model : SL-4012 Your purchase this SOUND LEVEL METER marks a step forward for into field precision measurement. Although this METER is a complex delicate instrument, durable structure will allow many years of use if proper operating techniques are developed.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS 1. FEATURES..............1 2. SPECIFICATIONS............1 3. FRONT PANEL DESCRIPTION........4 3-1 Microphone............4 3-2 Display..............4 3-3 Power On/Off Button..........4 3-4 Hold Button............4 3-5 REC./Max. Min. Button........4 3-6 Max. Hold Button..........4 3-7 A/C Weighting Button.........4 3-8 Time Weighting ( Fast / Slow ) Button....4 3-9 Range Button............

  • Page 3: Features

    1. FEATURES * Large LCD display, easy to read. * Main functions are designed to meet IEC 61672 class 2. * A & C weighting networks comply with standards. * 0.5" standard microphone head. * Time weighting (Fast & Slow) dynamic characteristic modes.
  • Page 4 Measurement 30 - 130 dB. Range Resolution 0.1 dB. Accuracy * Meet IEC 61672 class 2, tested under ( 23± 5 Input signal level on 94 dB & ℃ frequency range from 31.5 Hz to 8 k Hz, refer to page 11. Auto range : Range selector 30 to 130 dB.
  • Page 5 Terminal 1 : Output terminal RS 232/USB PC serial interface. * Connect the optional RS232 cable UPCB-02 will get the RS232 plug. * Connect the optional USB cable USB-01 will get the USB plug. Terminal 2 : AC output terminal. Terminal socket size : 3.5 mm dia.

  • Page 6: Front Panel Description

    3. FRONT PANEL DESCRIPTION Fig. 1 3-1 Microphone 3-9 Range Button 3-2 Display 3-10 AC Output Socket 3-3 Power On/Off Button 3-11 Calibration VR 3-4 Hold Button 3-12 RS232 Computer Interface 3-5 REC./Max. Min. Button Socket 3-6 Max. Hold Button 3-13 Battery compartment / Cover 3-7 A/C Weighting Button 3-14 Stand...

  • Page 7: Measuring Procedures

    4. MEASURING PROCEDURE 1) Power on by pressing the " Power On/Off Button " ( 3-3, Fig. 1 ) , the meter's default function is " Auto range ", " A frequency weighting " & " Fast time weighting ". The lower LCD display will show the unit "...
  • Page 8 Manual range 1 , 30 - 80 dB range : Display will show the unit of " 30 - 80 ". Manual range 2 , 50 - 100 dB range : Display will show the unit of " 50 - 100 ". Manual range 3 , 80 - 130 dB range : Display will show the unit of "...
  • Page 9 7) Data Hold During the measurement, pushing the " Hold Button " ( 3-4, Fig. 1 ) will hold the measured value & the LCD will indicate " HOLD " symbol. * Push the " Hold Button " again to release the data hold function.

  • Page 10: Auto Power Disable

    5. AUTO POWER DISABLE The instrument has built-in " Auto Power Shut-off " in order to prolong battery life. The meter will switch off automatically if none of the buttons are pressed within approx. 10 min. To de-activate this feature, Select the memory record function during measurement, by pressing the "...

  • Page 11: Rs232 Computer Interface

    7-2 RS232 computer interface The instrument is provided an 3.5 mm dia. phone socket ( 3-12, Fig. 1 ) for RS232 computer interface socket. The connector output is a 16 digits data stream which can be utilized to the user's specific application. A RS232 lead with the following connection will be required to link the instrument with the PC serial input.

  • Page 12: Replacement Of Battery

    Decimal Point(DP), position from right to the left 0 = No DP, 1= 1 DP, 2 = 2 DP, 3 = 3 DP D8 to D1 Display reading, D1 = LSD, D8 = MSD For example : If the display reading is 1234, then D8 to D1 is : 00001234 End Word RS232 setting...

  • Page 13: Frequency Weighting Characteristics Of A & C Networks

    (IEC 61672 class 2) F ( Fast ) - 1.0 dB + 1 dB - 2 dB S ( Slow ) - 4.1 dB ± 2 dB Hagavish st. Israel 58817 Tel: 972 3 5595252, Fax: 972 3 5594529 mrc@mrclab.com MRC.5.16...

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