PCE PCE-322A
Revision as of 20:13, 29 April 2016 by George-hopkins (talk | contribs) (Created page with "{{Infobox sound level meter | image = 180px | name = PCE PCE-322A | status = in progress | source_code_dir...")
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| Status | in progress |
|---|---|
| Source code | pce-322a |
| Connectivity | USB |
| Frequency range | 31.5Hz - 8kHz |
| Measurement range (A) | 30dB - 130dB |
| Resolution | 0.1dB |
| Accuracy (94dB@1kHz) | 1.4dB |
| Frequency weighting | A, C |
| Time weighting | F, S |
| Standards | IEC 61672-1 Class 2 |
| Website | pce-instruments.com |
The PCE-322A is an IEC 61672-1 class 2 compliant sound level meter with USB connectivity.
Hardware
TODO
Photos
Device, front
Device, back
Device, side
Protocol
The device communicates at 115200 baud, no parity, 8 data bits, and 1 stop bit (115200/8n1).
Commands
None of the following commands are needed to receive live measurements from the device; see the next section.
The commands are always 2 byte and take no parameters.
The following commands are supported:
| Command | Description |
|---|---|
| 0xac 0xff | Connect |
| 0xca 0xff | Disconnect |
| 0xaa 0xf1 | Toggle dBA/dBC |
| 0xaa 0xf2 | Toggle Scale (Auto, 30-80, 50-100, 80-130) |
| 0xaa 0xf3 | Toggle Min/Max/Current |
| 0xaa 0xf4 | Toggle Fast/Slow |
| 0xaa 0xf5 | Toggle Hold |
| 0xaa 0xf6 | Toggle Backlight |
| 0xaa 0xf7 | Toggle Time/Date |
| 0xaa 0xf8 | Power Off |
Measurements and settings
Current settings and measurements are continually streamed over the serial bus, without any prompting from the PC. Data is encapsulated in packets of 13 bytes. The packets are structured as follows:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
| 0x7f | ? | ? | ? | ? | ? | ? | ? | ? | ? | ? | ? | 0x00 |