This is an instruction manual for a C-322 data logging sound level meter.
The Reed Instruments C-322 is a datalogging sound level meter featuring IEC651 Type II compliance, auto-ranging capabilities from 30 to 130 dB, and a dynamic range of 50 dB. It includes a 4-digit backlit LCD display with an analog bar graph and supports both AC and DC output. The device is powered by a 9V alkaline battery and includes features such as Max/Min hold, auto power off, and real-time clock logging for data points.
| Measuring Range | 30 to 130 dB |
|---|---|
| Dynamic Range | 50 dB |
| Memory Capacity | 32,000 records |
| Accuracy | ±1.5 dB @ 94 dB |
| Frequency Range | 31.5 Hz to 8 kHz |
| Microphone Type | 1/2" electret condenser |
| Power Supply | 1 x 9V alkaline battery |
| Dimensions | 275 × 64 × 30mm |
The meter powers itself off after 30 minutes without operation.
Press and hold the FAST/SLOW button while turning the meter on.
It should be calibrated once a year to ensure accuracy.