Base 10 to Base 4 Reference Chart
CRBasic dataloggers use base 10 when addressing 
SDM Synchronous Device for Measurement. A processor-based peripheral device or sensor that communicates with the datalogger via hardwire over a short distance using a protocol proprietary to Campbell Scientific. devices. Edlog programmed dataloggers (e.g., CR10X, CR23X) used base 4 for addressing.
Base 10 to base 4 reference chart:
| Base 10 | Base 4 |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 10 |
| 5 | 11 |
| 6 | 12 |
| 7 | 13 |
| 8 | 20 |
| 9 | 21 |
| 10 | 22 |
| 11 | 23 |
| 12 | 30 |
| 13 | 31 |
| 14 | 32 |
| 15 | 33 (reserved) |