1. Introduction
The Supco EM80 is an auto-ranging digital sound level meter designed for analyzing and solving excessive sound level problems. It provides accurate measurements of sound pressure levels in various environments.
This manual provides detailed instructions for the proper setup, operation, maintenance, and troubleshooting of your EM80 Sound Level Meter.
2. Product Features
- Analyzes and solves excessive sound level problems.
- Features a backlit LCD display for clear readings.
- Includes an auto power off function to conserve battery life.
- Offers a sound measurement range of 30 to 120 dB.
- Complies with European Union (EU) 93/68/EEC, IEC 651 Type 2, and ANSI S1.4 Type 2 standards for sound-level meters for general field use.
- Performs A-type frequency weighting in four ranges: 60 dB, 80 dB, 100 dB, and 120 dB.
- Provides 0.1 dB resolution and 1.5 dB accuracy for measurements under 94 dB.
- Frequency range: 31.5Hz to 8KHz.
3. Components and Controls
Figure 1: Supco EM80 Sound Level Meter Overview
The image above illustrates the Supco EM80 Sound Level Meter. Key components and controls include:
- Microphone with Foam Cover: Located at the top, responsible for capturing sound.
- LCD Display: The central screen that shows digital measurement values, a bar graph, and various indicators (e.g., battery level, AUTO/MANUAL mode).
- ON/OFF Button: Powers the device on or off.
- Up/Down Arrow Buttons: Used for navigation or adjusting settings (e.g., manual range selection).
- Auto/Manu Button: Toggles between automatic and manual measurement range selection.
- Battery Compartment: Located on the rear (not visible in image), holds three 1.5V AAA batteries.
4. Setup
- Battery Installation:
Locate the battery compartment on the back of the meter. Open the compartment cover and insert three 1.5V AAA batteries, ensuring correct polarity (+/-). Close the battery compartment cover securely.
- Initial Power On:
Press the ON/OFF button to power on the device. The LCD display will illuminate and show initial readings.
5. Operating Instructions
5.1 Taking a Measurement
- Power On: Press the ON/OFF button.
- Select Mode (Auto/Manual):
The meter defaults to auto-ranging mode. To switch to manual range selection, press the Auto/Manu button. In manual mode, use the Up/Down arrow buttons to cycle through the available ranges (60 dB, 80 dB, 100 dB, 120 dB).
- Position the Meter:
Hold the meter with the microphone pointed towards the sound source. Ensure no obstructions are blocking the microphone.
- Read the Display:
The LCD will display the sound level digitally. A bar graph also provides a visual representation of the sound level. Digital response time is 0.75 seconds, and bar graph response time is 0.25 seconds.
- Power Off: Press the ON/OFF button again to turn off the meter. The auto power off feature will also turn off the device after a period of inactivity to save battery life.
5.2 Understanding the Display
The LCD display provides several pieces of information:
- Digital Reading: Shows the precise sound level in decibels (dB).
- Bar Graph: A dynamic visual indicator of the current sound level.
- Range Indicators: Displays the currently selected measurement range (e.g., 60, 80, 100, 120 dB).
- Battery Indicator: Shows the remaining battery life.
- Mode Indicator: Indicates whether the meter is in AUTO or MANUAL mode.
6. Maintenance
- Cleaning: Wipe the meter with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Battery Replacement: Replace batteries when the low battery indicator appears on the display. Always use fresh 1.5V AAA batteries. Remove batteries if the meter will not be used for an extended period.
- Storage: Store the meter in its included carrying case in a cool, dry place, away from direct sunlight and extreme temperatures.
- Microphone Care: Keep the microphone clean and free from dust or debris. The foam cover helps protect it.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Meter does not power on. | Dead or incorrectly installed batteries. | Check battery polarity. Replace with new 1.5V AAA batteries. |
| Inaccurate readings. | Microphone obstructed; incorrect measurement range; external interference. | Ensure microphone is clear. Switch to Auto mode or select appropriate manual range. Move away from strong electromagnetic fields. |
| Display is dim or flickering. | Low battery. | Replace batteries. |
8. Specifications
| Parameter | Value |
|---|---|
| Model Number | EM80 |
| Sound Measurement Range | 30 to 120 dB |
| Accuracy | 1.5 dB (under 94 dB) |
| Resolution | 0.1 dB |
| Frequency Range | 31.5Hz to 8KHz |
| Frequency Weighting | A-type (60 dB, 80 dB, 100 dB, 120 dB ranges) |
| Digital Response Time | 0.75 seconds |
| Bar Graph Response Time | 0.25 seconds |
| Operating Temperature | -32 to +104 degrees F (0 to 40 degrees C) |
| Operating Humidity | 10 to 80 percent RH |
| Power Source | Three 1.5V AAA batteries (included) |
| Dimensions (H x W x D) | 6-3/32 x 2-25/64 x 1-3/16 inches (approx. 6.1 x 2.4 x 1.2 inches) |
| Weight | 5.2 oz. (180g) |
9. Compliance Information
The Supco EM80 Sound Level Meter complies with the following international standards:
- European Union (EU) 93/68/EEC
- IEC 651 Type 2
- ANSI S1.4 Type 2
These standards ensure the meter's suitability for general field use in sound level measurement.
10. Warranty and Support
For warranty information and technical support, please refer to the documentation included with your purchase or contact Supco customer service directly. Keep your purchase receipt as proof of purchase.
For further assistance, visit the official Supco website or contact their support channels.