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CEL-240 Instruction Manual. HB3331-01 ENGLISH
Digital Sound Level Meter
December 07
Introduction
Congratulations on your purchase of the CEL-240 Digital Sound Level Meter. The CEL-
240 has been designed to perform accurate noise measurements through a wide decibel
range. The CEL-240 is a completely digital sound level meter, designed for stable,
reliable performance, fully compliant with international sound level meter standards.
This instruction manual is to help you get the most benefit from your CEL-240 and to
ensure accurate noise measurements.
Diagrams
The illustrations and diagrams of the CEL-240 instrument and display screens are located
at the beginning of this manual and are referenced in the operation of the instrument
below. Please refer to the appropriate diagram at the beginning of this manual.
Figure A: CEL-240
1. Microphone
2. Power button
3. Display
4. Left key
5. Right key
Figure D: Display
1. Battery indicator
2. Over range indicator
3. decibel level
4. Analogue display bar
5. Measurement scale
K
Figure B: Battery Compartment
1.
Battery direction
2.
¼" Tripod socket
Figure C: Connections
1.
USB Socket
2.
Auxiliary socket (2.5mm Stereo)
Figure E:
Calibration screen
Figure F:
Completed calibration
Figure G:
Contrast adjustment screen
Figure H:
Calibration level setting
Figure I:
Source input selection
Figure J:
Time history display
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