Key facts
- Brand
- Reed Instruments
- Model
- C-322
- Category
- Other Electronics
- Documents
- 3
- Languages
- ZH · EN
- Last added
- 2023-10-19
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Reed Instruments C-322 Datalogging Sound Level Meter Instruction Manual
This manual provides detailed instructions for operating the Reed Instruments C-322 datalogging sound level meter. It covers features such as auto-ranging, real-time clock logging, and data recording. The guide explains how to set frequency and time weighting, adjust level ranges, take measurements, use MAX/MIN hold, and configure the clock and recording intervals. It also includes calibration procedures and instructions for using the RS232 interface software.
The device includes a 4-digit backlit LCD display, a 1/2” electret condenser microphone, and supports both AC and DC output. It operates on a 9V alkaline battery and measures sound levels from 30 to 130 dB with ±1.5 dB accuracy at 94 dB. The manual also details how to erase memory and replace the battery. This manual is written in Chinese.
Reed Instruments C-322 specifications
| Measuring Range | 32 to 80 dB, 50 to 100 dB, 80 to 130 dB |
|---|---|
| Resolution | 0.1 dB (1dB analog) |
| Accuracy | ±1.5 dB @ 94 dB |
| Frequency Range | 31.5 Hz to 8 kHz |
| Microphone | 1/2” electret condenser microphone |
| Power Supply | 1 x 9V alkaline battery |
| Dimensions | 275 × 64 × 30mm (10.8 × 2.5 × 1.2”) |
| Weight | 285g (0.55lb) |
Source: Reed Instruments C-322 Datalogging Sound Level Meter Instruction Manual
All Reed Instruments C-322 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
How do I set the frequency and time weighting?
Press the A/C button to switch between A and C Frequency Weighting. Press the Fast/Slow button to switch between fast and slow Time Weighting measurements.
From: Reed Instruments C-322 Datalogging Sound Level Meter Instruction Manual
How do I calibrate the meter?
Calibrate the instrument before operation if it was not in use for a long time or operated in a bad environment. Set the display to dBA, time weighting to FAST, measurement mode to MAX MIN, and level range to 50 to 100dB. Insert the microphone housing into the calibrator and adjust the CAL potentiometer until the desired level is displayed.
From: Reed Instruments C-322 Datalogging Sound Level Meter Instruction Manual
What is the dynamic range of the C-322?
The dynamic range of the C-322 is 50 dB.
From: Reed Instruments C-322 Datalogging Sound Level Meter Instruction Manual
How often should the instrument be calibrated?
The instrument should be calibrated once a year to ensure accuracy over a long period.
From: Reed Instruments C-322 Datalogging Sound Level Meter Instruction Manual
What is the auto power off duration?
The meter powers itself off after 30 minutes without operation.
From: Reed Instruments C-322 Datalogging Sound Level Meter Instruction Manual
How do I disable the auto power off feature?
Press and hold the FAST/SLOW button while turning the meter on.
From: Reed Instruments C-322 Datalogging Sound Level Meter Instruction Manual