AN500 - Measurement Extech - Free user manual and instructions
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| Product Type | Sound Level Meter |
| Dimensions | 8.5 x 3.0 x 1.5 in (216 x 76 x 38 mm) |
| Weight | 0.5 lb (227 g) |
| Power Supply | 9V battery (NEDA 1604) |
| Frequency Weighting | A and C |
| Response Time | Fast (125 ms) and Slow (1 s) |
| Measurement Range | 30 to 130 dB |
| Accuracy | ±1.5 dB (typical) |
| Functions | Data Hold, Max/Min, Auto Range, Backlight |
| Display | Backlit LCD with bargraph |
| Data Logging | Supports up to 32,000 records |
| Interface | USB for PC connection |
| Standards | IEC 61672-1 Class 2 |
| Maintenance | Clean with soft damp cloth; avoid solvents |
| Safety Precautions | Do not use in explosive atmospheres; remove battery if not used for extended period |
| Spare Parts | Replacement battery (9V), windscreen |
| Warranty | 2 years |
Frequently Asked Questions - AN500 Extech
How do I perform a measurement with the Extech AN500?
Press the power button to turn on. Point the microphone towards the sound source. Read the dB level on the LCD. Use the HOLD button to freeze the reading.
What is the difference between A and C weighting?
A-weighting simulates the human ear's response to low-level sounds, while C-weighting is flatter for high-level sounds. Use A for environmental noise and C for peak measurements.
How do I change the battery?
Turn off the meter. Slide the battery cover at the back. Replace the 9V battery with a new one. Reattach the cover.
Can I record data over time?
Yes, the AN500 supports data logging. Connect via USB to a PC and use the included software to configure logging intervals and download data.
What should I do if the display shows '999.9 dB'?
This indicates an overload or under range. Check if the sound level is within the meter's range (30-130 dB) and select the appropriate range if auto-ranging is off.
How do I calibrate the meter?
Use an external calibrator (e.g., Extech 407744). Insert the microphone into the calibrator cavity, turn on the calibrator, and adjust the meter's calibration screw until it matches the calibrator's output.
Is the microphone detachable?
No, the microphone is fixed. However, you can attach a windscreen for outdoor use to reduce wind noise.
What does the 'FAST/SLOW' button do?
It selects the response time. FAST (125 ms) captures rapid changes, while SLOW (1 s) averages fluctuations for steady readings.
How do I clean the meter?
Use a soft, slightly damp cloth to wipe the exterior. Do not use harsh chemicals or immerse in water.
Where can I find the user manual?
The manual is available for free download on notice-facile.com and the Extech website. Search for 'Extech AN500 manual'.
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