Introduction
The Sper Scientific 840029 Digital Type 2 Sound Meter is designed for accurate measurement of sound levels in various environments. This device meets IEC 61672 Class 2 and ANSI S1.4 Type 2 frequency and time weighting specifications, making it suitable for applications such as OSHA compliance testing, environmental noise assessment, and industrial sound analysis. This manual provides essential information for the proper setup, operation, and maintenance of your sound meter.
Image: Front view of the Sper Scientific 840029 Digital Type 2 Sound Meter, displaying a reading of 72.6 dB on its LCD screen.
Package Contents
Please verify that all items listed below are present in your package:
- Sper Scientific 840029 Digital Type 2 Sound Meter
- Protective Carrying Case
- Instruction Manual (this document)
- Foam Windscreen
- Calibration Tool
- 9V Battery
Image: The Sper Scientific 840029 Sound Meter, a 9V battery, and a small calibration tool neatly arranged within its protective carrying case.
Key Features
- Meets IEC 61672 Class 2 and ANSI S1.4 Type 2 standards.
- Selectable "A" and "C" decibel frequency weighting scales.
- Selectable Fast or Slow response time.
- AC or DC output for external devices.
- Peak function to capture maximum sound levels.
- Large LCD display with 0.1 dB resolution.
- Indicators for low battery and over/under load conditions.
- Wide measurement range: 30 ~ 130 dB (A-scale), 35 ~ 130 dB (C-scale).
- Accuracy of ±1.5 dB.
- Internal oscillation system for simplified calibration.
- CE Approved for safety and quality.
- Integrated fold-out tripod stand for stable positioning.
Setup
Battery Installation
- Locate the battery compartment on the back of the sound meter.
- Open the battery cover by sliding or unlatching it.
- Insert the supplied 9V battery, ensuring correct polarity (+ and - terminals match).
- Close the battery cover securely.
Windscreen Attachment
Gently slide the foam windscreen over the microphone at the top of the unit. The windscreen helps to minimize wind noise interference during outdoor measurements, ensuring more accurate readings.
Image: The Sper Scientific 840029 Sound Meter with its foam windscreen attached, positioned next to its carrying case and a small calibration screwdriver.
Operating Instructions
Power On/Off
To power on the device, slide the ON/OFF (AC) switch to the "ON" position. To power off, slide the switch to "OFF".
Selecting Measurement Range
Use the dB switch to select the appropriate decibel range for your measurement: 30-80 dB, 50-100 dB, or 80-130 dB. If the display shows "OVER" (overload) or "UNDER" (underload), adjust the range switch to a more suitable setting until a valid reading is displayed.
Weighting Scales (A/C)
The WEIGHTING switch allows you to select between "A" and "C" frequency weighting scales:
- A-Weighting: This setting mimics the human ear's response to sound at lower to moderate levels. It is commonly used for general environmental noise measurements and for assessing compliance with occupational noise exposure limits (e.g., OSHA).
- C-Weighting: This setting provides a flatter frequency response, measuring sound levels more uniformly across the audible spectrum. It is often used for measuring peak sound levels or the noise output of machinery.
Response Time (Fast/Slow)
The RESPONSE switch selects the meter's response time:
- FAST: This setting captures rapid changes in sound levels, suitable for measuring impulsive or quickly fluctuating noise.
- SLOW: This setting provides an averaged reading over a longer period, offering a more stable measurement for noise levels that fluctuate significantly.
MAX HOLD Function
Slide the MAX HOLD switch to activate this function. The meter will continuously monitor and display the highest sound level detected since the function was engaged. To clear the held value and restart the maximum hold measurement, slide the switch off and then back on.
Calibration
The meter features an internal oscillation system for basic calibration checks. For precise calibration, it is recommended to use an external acoustic calibrator. The "94dB CAL" setting can be used for quick verification against a known 94 dB source. For detailed calibration procedures, please refer to the comprehensive manual or contact Sper Scientific customer support.
Maintenance
Cleaning
To clean the meter, gently wipe the exterior with a soft, dry cloth. Avoid using abrasive cleaners, solvents, or harsh chemicals, as these can damage the device. Ensure the microphone is kept clean and free from dust, lint, or any obstructions that could affect measurement accuracy.
Storage
When the sound meter will not be used for an extended period, remove the 9V battery to prevent potential leakage and damage to the internal components. Store the meter in its protective carrying case in a cool, dry environment, away from direct sunlight, extreme temperatures, and high humidity.
Battery Replacement
When the low battery indicator appears on the display, it signifies that the 9V battery needs to be replaced. Promptly replace the battery to ensure continued accurate operation of the device.
Troubleshooting
- No Display or Power: Check that the 9V battery is correctly installed with proper polarity and has sufficient charge. Replace the battery if necessary.
- "OVER" or "UNDER" on Display: This indicates that the current sound level is outside the selected measurement range. Adjust the dB range switch to a higher or lower setting until a stable reading is shown.
- Inaccurate or Unstable Readings: Ensure the microphone is clear of any obstructions and the windscreen is properly attached. Verify that the correct weighting (A/C) and response time (Fast/Slow) settings are selected for your application. Perform a calibration check.
- Intermittent Operation: Check battery connections for looseness. Ensure the device is not exposed to extreme environmental conditions (temperature, humidity).
If you encounter issues that cannot be resolved using these troubleshooting steps, please contact Sper Scientific customer support for further assistance.
Specifications
| Parameter | Value |
|---|---|
| Model | 840029 |
| Display | 3½ digit LCD, 0.1 dB resolution |
| Measurement Range (A-Weighting) | 30 ~ 130 dB |
| Measurement Range (C-Weighting) | 35 ~ 130 dB |
| Accuracy | ±1.5 dB |
| Frequency Weighting | A and C |
| Time Weighting | Fast and Slow |
| Output | AC and DC |
| Power Supply | 9V battery |
| Power Consumption | Approx. DC 6mA |
| Dimensions | 8 x 4 x 8 inches |
| Weight | 9.98 ounces (without battery) |
| Standards | IEC 61672 Class 2, ANSI S1.4 Type 2, CE Approved |
Image: A table showing the ranges, resolution, and accuracy for the Sper Scientific 840029 Sound Meter, specifically 30 to 130 dBA and 35 to 130 dBC with 0.1 dB resolution and ±1.0 dB accuracy.
Warranty and Support
Sper Scientific products are manufactured to high standards for reliability and precision. For detailed warranty information, technical support, or service inquiries, please visit the official Sper Scientific website or contact their customer service department directly. It is recommended to retain your purchase receipt as proof of purchase for warranty claims.
For additional product information and resources, you can visit the Sper Scientific Store on Amazon.
Additional Information
This digital sound meter is an essential tool for professionals and individuals requiring accurate sound level measurements for various applications, including compliance with safety regulations and general noise monitoring.
Image: A banner displaying the Sper Scientific brand logo and slogan: "Precision. Performance. Peace of Mind."
