Sper Scientific 840012 User Manual

Detachable Probe Sound Meter

SPER
SCIENTIFIC

840012

Instruction Manual

LTD.

CONTENTS

1. Introduction ............................................................................. 3

2. Meter Description .................................................................... 3

3. Operating Instructions

3-A Measuring Procedures .................................................. 4

3-B Hold ............................................................................... 4

3-C Rec. Max/Min ................................................................. 4-5

3-D Max. Hold ...................................................................... 5

3-E Signal Output ................................................................. 5

3-F Calibration ..................................................................... 5

3-G Precautions .................................................................... 5

3-H Auto Shut Off ................................................................. 6

3-I Battery Replacement ..................................................... 6

3-J RS232 PC Serial Interface ............................................ 6

4. Specifications .......................................................................... 7

5. Frequency Weighting (A and C) Characteristics ..................... 8

6. Warranty .................................. ....................... ..................... .... 8

- 2 -

1. INTRODUCTION

Features a detachable probe for easy replacement, and both RS232
computer interface and AC outputs. Also has A and C decibel fre­quency weighting scales, fast or slow time weighting, and two hold
functions. Meets IEC651 and ANSI S1.4 specifications for a type 2
sound meter. Covers 30~130 dB in both Manual and Auto ranging
scales with 0.1 dB resolution and an accuracy of ±1.5 dB. Calibrate in
compliance with OSHA using Acoustical Calibrator 840031 or equiva­lent. Has a fold-out easel back and a tripod screw.

2. METER DESCRIPTION

1

5

6

2

3

7 8 9

10 11

12 13

4

14
15
16

17

18

1. Microphone

2. Probe Holder

3. Probe Handle

4. BNC Plug

5. BNC Socket

6. LCD display

7. Power Button

8. Hold Button

9. Rec./Max./Min

10. Max. Hold Button

11. A/C Button

12. Fast/Slow Button

- 3 -

13. Range Button

14. AC Output

15. Cal. Adjustment

16. RS232 Output

17. Easel

18. Battery