Voltcraft DL-161S¶
Voltcraft DL-161S¶
| Status | planned |
| Connectivity | USB |
| Frequency range | 31.5Hz - 8kHz |
| Measurement range (A) | 30dB - 130dB |
| Accuracy (94dB@1kHz) | 1.4dB |
| Frequency weighting | A, C |
| Time weighting | F, S |
| Standards | IEC 61672-1 Class 2 |
| Website | Voltcraft |
The Voltcraft DL-161S is a sound level meter with USB connectivity.
See Voltcraft DL-161S/Info for more details (such as lsusb -vvv output) about the device.
This is a rebadged CEM DT-173.
Hardware¶
TODO
Photos¶
Voltcraft Dl 161s
Protocol¶
The host sends commands and receives responses via a virtual serial port, with USB bulk endpoint 2 as a backend. A command consists of a single byte followed by any arguments to the command.
| Command | Response | Description |
|---|---|---|
| 0x0c | 0xff | Calibrate device, 2 bytes payload: |
| 1 | Calibration value, as a signed integer between -10 and 10, where 1 represents 0.1 dB | |
| 2 | Unused (0x00) | |
| 0x0e | 0xff | Configure device |
| 3 | "REC" LED flash interval, in seconds: 0=none, 10, 20, 30. | |
| 4 | Bitfield representing the following flags: |
7 | Activation: 0=immediate, 1=manual | | 6-5 | Unused | | 4 | 0=store measurements, 1=real-time | | 3 | Frequency weighting: 0=dBC, 1=dBA | | 2 | Time weighting: 0=Slow, 1=Fast | | 1-0 | Unused |
5
Sample interval 1-7, representing 50ms, 500ms, 1s, 2s, 5s, 10s, 60s respectively.
6
Last two digits of year, e.g. 0x0d for 2013
7
Month, 1-12
8
Day of month, 1-31
9
Hours
10
Minutes
11
Seconds
12-14
Number of samples to acquire, as a big-endian integer.
15
Alarm low threshold
16
Alarm high threshold
0x0d
0xff
Get stored measurement count, 2 bytes payload:
1-2
Always 0x0000?
Response has 3 byte payload, representing the number of bytes used in sample memory as a little-endian integer. Each sample uses two bytes.
0x0f
Get stored measurements, 2 bytes payload is offset into buffer (as pages? page size?)
| 1 | ||
|---|---|---|
| 2 | Sample rate 1-7, as above. | |
| 3 | ||
| 4 | ||
| 5 | ||
| 6 | ||