v PRECISION GOLD Maplin Electronics Ltd Brookfields Way, Manvers Wath-Upon-Dearne Rotherham, S63 5DL www.maplin.co.uk X CE / Wie COL D NSTRUCTION MANUAL MODEL: NO5CC User's Manual Sound Level Meter (1)Select the following buttons or function settings. Display: dB, A, Hior Lo, F Function: A-Weighting Response Time: FAST Level range: 30 to 100dB(Lo) or 60 to 130dB(Hi) Measurement mode: MAX Hold and Data Hold Mode function disable. (2) Fit wind shield onto top of meter. (3) Open battery cover and remove the battery (without disconnecting it) to adjust the CAL94dB potentiometer of the unit. The LCD screen will indicate the desired sound level. All products are fully calibrated. 11 Title VIL. VIII. Contents Safety Information General Description Specifications Name And Functions Measurement Preparation Page Operating Precautions Taking Measurements Calibration Procedures = с N ч ь № —= = I. A Safety information Viil. Calibration Procedures Read the following safety information carefully before attempting Using a standard Acoustic Calibrator (94dB, 1kHz Sine wave) to operate or service the meter. Use the meter only as specified in this manual; otherwise, the 17 protection provided by the meter may be impaired. e Environment conditions 1 Altitude up to 2000 meters Acoustic Calibrator THT 2 Relative humidity 90% max. 3 Operational ambient temperature 0~40°C + e Maintenance & Clearing 9V 1 Repairs or servicing not covered in this manual should only be BATTERY performed by qualified personnel. ECO > 2 Periodically wipe the case with a dry cloth. Do not use abrasives or solvents on this product. -CAL94dB- e Safety symbols v< AH) Alo} Dv egos 2 [CO] Meter is protected throughout by double or reinforced \ insulation. NS ici fi a Screwdriver When servicing, use only specified replacement parts. ion CE EMC compliant (je ——— II. General Description Thank you for using our Sound Level Meter. To ensure that you get the most from it, we recommend that you read and follow the manual carefully before use. 1 10 (4) Hold the instrument comfortably in hand or fix on tripod and point the microphone at the suspected noise source, the sound pressure level will be displayed. (5) When MAX (maximum hold) mode is chosen. The instrument captures and holds the maximum noise level for a long period using any of the time weightings and ranges. (6) When HOLD (data hold ) mode is chosen.The hold function freezes the reading in the display. Press the HOLD button momentarily to activate or to exit the HOLD function (7) Turn OFF the instrument and remove battery when not in use This unit conforms to the IEC651 type 2, ANSI S1.4 type 2 for Sound Level Meters. This Sound Level Meter has been designed to meet measurement requirements of safety engineers, health and industrial safety offices and sound quality control in various environments. ® Ranges from 30dB to 130dB at frequencies between 31.5Hz and 8 KHz. ® Display with 0.1dB steps on a 4-digits LCD. With two equivalent weighted sound pressure levels, e AandC. III. Specifications Standard applied: IEC651 type 2, ANSI S1.4 type 2 Frequency range: 31.5Hz~8KHz Measuring level range: 30-130dB Frequency weighting: :A/C Microphone: 1/2 inch electric condenser microphone Calibration: Electrical calibration with an internal oscillator (1kHz sine wave) Display: LCD Digital display: 4 digits Resolution: 0.1dB Display Up data: 0.5 sec. Time weighting: FAST(125mS), SLOW(1 sec.) Level ranges: Lo: 30-100dB Hi: 60-130dB Accuracy: + 1.5dB (under reference conditions) Alarm function: “OVER” is show when input is out of range Maximum hold : Hold reads the maximum value, with decay < 1dB/3minutes. Auto power off : Meter automatically shuts down after approx. 15 minutes of inactivity. Power supply: One 9V battery (Order Code L46AL) Battery life: About 50hrs(alkaline Battery) Operation temperature: 0 to 40°C (32 to 104°F) Operation humidity: 10 to 90%RH 2 Storage temperature: -10 to 60°C( 14 to 140 °F) Storage humidity: 10 to 75%RH Dimensions: 210(L)X55(W)X32(H)mm Weight: 230g (including battery) Supplied with 9V battery, storage case and instruction manual. (2) (3) (4) (5) (6) To achieve more accurate measurement, use an extension cable to separate the microphone from the main body so that the effect of unexpected sound reflection can be eliminated. Calibrate the instrument before use if it has not been used for a long time or if the last operation was in bad environmental conditions. Do not store or operate the instrument at high temperatures or in high humidity. Keep microphone dry and avoid severe vibration. Please take the battery and keep the instrument in low humidity environment. When not in use. VII. Taking Measurements (1) (2) Open battery cover and insert a 9 volt battery into the battery compartment. Turn on power and select the desired response time and weighting. If the sound source consists of short bursts or only catches the peak sound level, set the response time to FAST. To measure average sound, use the slow setting. Select A- weighting for measuring general noise sound level and C-weighting for measuring the sound level of acoustic material. (3) Select desired level MAX/ Hold button The MAX Hold position is used to measure the maximum level of sound. The maximum measured level is updated continuously. Pressing the button again will release the hold and allow a further measurement. Data Hold button: Press and hold the button for over 2 second to turn the data hold function on or off. The hold function freezes the reading in the display. © Microphone 1/2 inch electric condenser microphone Battery Cover V. Measurement Preparation V. Name and Functions (1) Battery loading: Remove the battery cover on the back and insert a 9V battery. 1 (2) Battery replacement: When the battery voltage drops below the operating voltage, “BAT” appears on the LCD screen. If this appears the battery should be replaced with new one. © ps = & 2 ALO 5 Os 900 © SOUND LEVEL: Lo=30~100dB Hi=60~130dB Frequency Weighting:A,C т. Fast (— A @® Wind speed If operated at wind speeds over 10m/sec, please put a protective shield in front of the microphone. @ Display [MAX HOLD) — DATA HOLD] SLU sn | | | Lis 0 SYMBOL UNCTION LCD 4 digits MAX Maximum value hold OVER Over range F Fast response S Slow response A A-Weighting (normal sound) C C-Weighting (acoustic sound) Lo Low Range (30-100dB) Hi High Range (60-130dB) BAT Low-Battery 5 @ Power ON/OFF button (6) Turns the meter power ON/OFF ® Backlight Button: (©) Turns the meter backlight ON/OFF ® A-weighting / C-weighting select button A: A — Weighting. For general sound level measurements. C: C — Weighting. For checking the low- frequency content of noise. (If the C-Weighted level is much higher than the A-Weighted level, then there is a large amount of low-frequency noise) ® Time weighting select button F (fast response): for normal measurements (fast varying noise) S (slow response): for checking average level of fluctuating noise @ Level range select button(Lo/HD Lo: 30-100dB; Hi: 60-130dBWhen “OVER” is indicated, the meter automatically switches to another range for measurement.
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