Measures

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PCE-353 sound level indicator with Leq function
device with internal memeory, cable and software, meets all directives in force for machines

The PCE-353 sound level indicator comes with the Leq function. This sound level indicator offers the possibility to measure integrated sound level (Leq). The sound level indicator is indispensable for professionals to take measurements in the workplace. This device will save the complex calculation of the Leq / Leaq value. With an internal memory of 32,000 readings, this sound level indicator is ideal for measurements over long periods of time.
The data can be exported to a PC with the help of the RS-232 data cable for futher analysis. The software, in English, can present the readings in tables or graphs. (Extract of the interface protocol).
The sound level indicator meets the standards for measuring noise. It includes the CE certification as it meets with the standard for machines ( 89/ 393/ EWG). Here you will find other sound level inidcators but without the Leq function.

• Measurements to choose from: SPL, Leq, SEL, Lmin & Lmax, combined with impulse or time weighting (fast / slow)

• Memory for 32.000 readings
• Digital indicator (refreshes every 0.5 seconds)
• Analogue display with 4dB divisions, a range of 100dB, (refreshes ever 100 ms)
• MIN, MAX and Hold functions
• Analogue output, 2 Vrms EW at 600 Ohm
• Anaolgue output, 10 mV / dB at 100 Ohm
• ABS enclosure
• 35mm LCD display with 4 digits and quasi analogue bar graph
• 1/2" condenser microphone with windscreen
• Frequency weighting A & C

 View or print the user's manual

Sound level indicator with Leq function

The sound level indicator can be used to take single measurements or over a duration of time. Readings can be transfered to a PC by the RS-232 connector or using the anologue output to be evaluated and analysed in various ways. The software also allows for the data to be exported to other programs to be manipulated and presented. The zoom function allows a more precise analysis for each value. The software also allows the device to be programmed by the user.

The PCE-353 sound level indicator is very useful to locate and record a general or specific sound level and an in this way you will avoid putting workers at risk on the job by not exposing them to too much noise.

With the help of the optional tripod for the PCE-353 sound level indicator can take readings over a period of time with ease. The readings can be exported to a PC or laptop for analysis via the RS-232 conector.

The tripod for the PCE-353 sound level indicator to take measurements over a period of time.

Internal calculation of the energy equivalent of a continuous sound level (Leq)
 
                

• L_Aeq integrated sound level in a time ofr reference (T) - approximate value
• T time of reference: from 6:00 to 22:00 (during the day) 
  (daily measurement with a time reference of 6 months of the year with more traffic)
• Sum of all sound events (N) in a time of reference (T)
• i actual indication of a peculiar sound event
• t_10,i Duration of the sound event (i-ten) according to AzB /11/ (period of time in that the level of sound (LAS (t)) isn't more than 10dB below the maximum level od sound pressure (LASmax) of a sound event ("10dB - down-time")
• L_ASmax,i maximum value of the level of sound pressure of the sound event (i-ten)

We have accumulated some key points about taking sound measurements with the help of a sound level indicator:

Terms / Directives             Operation / Use              Noise in the workplace

Resolution

0.1dB

Accuracy

±1.5dB

Frequency

31.5 Hz to 8kHz

Data logger

32,000 readings

Frequency weighting

A & C

Display

35mm LCD with quasi analogue bar graph

Operating conditions

0 to +40°C, < 80 % r.h.

Power

9V battery (PP3)

Dimensions

256 x 72 x 21 mm

Standard

IEC 651 Type II (class II)

Contents
PCE-353 sound level indicator, microphone windscreen, RS-232 cable, software (compatible with Windows^® 95, 98, 2000 and XP (professional), calibration screwdriver, 1 x 9V battery, carrying case and user's manual

Optional accessories
- Acoustic calibrator
Acoustic calibrator for regular recalibration. The noise meter comes calibrated but the sensor suffers oscillation over time and with the acoustic calibrator can be recalibrated independantly to allow for optimum measurements.

- ISO calibration certificate
For companies that wish to include te device in thier group of internal tools or for annual recalibrations (in cases when the calibrator is not used). The ISO calibration includes a laboratory calibration includes a document with all the measurement values. 

- Microphone extension cable
5 meter long cable. If the noise meter is used with this component, it will be able to measure directly the source of sound in machines or to check products. It will also allow for readings to be taken in areas that are difficult to access.

- Tripod
Light-weight aluminium tripod.  It's useful for making a series of measurements and guarantees that readings can be reproduced more accurately by keeping the microphone fixed in place. Furthermore, the user can be free to manually record readings or to perform other tasks. 

- Power adaptor
The supply of regular power will prevent erroneous measurements caused by failing batteries.  If you are going to take measurements for long periods of time with the data logger connected, it is recommended you use a power adaptor.