Precision Measurement Engineering, Inc.
| P3 PIN # | A/D CHANNEL | FUNCTION (IF INSTALLED) |
| 13 | 0 | FAST T0 |
| 14 | 1 | FAST T1 |
| 15 | 2 | FAST C |
| 17 | 3 | uDO |
| 19 | 4 | ACCURATE C |
| 21 | 5 | ACCURATE T |
| 23 | 6 | T OF FAST CT CIRCUIT |
| 25 | 7 | FLUOROMETER |
| 16 | 8 | PAR |
| 18 | 9 | AVAILABLE |
| 20 | 10 | AVAILABLE |
| 22 | 11 | AVAILABLE |
| 24 | 12 | AVAILABLE |
| 26 | 13 | AVAILABLE |
| N/A | 14 | DEPTH |
| N/A | 15 | ANALOG GROUND |
| 5 | 16 | GRAD FAST T0 |
| 6 | 17 | GRAD FAST T1 OR GRAD FAST C |
| 7 | 18 | GRAD FAST C |
| 8 | 19 | GRAD ANALOG GROUND |
| 9 | 20 | AVAILABLE |
| 10 | 21 | AVAILABLE |
| 11 | 22 | AVAILABLE |
| 12 | 23 | AVAILABLE |
| 4 | 24 | AVAILABLE |
| N/A | 25 | ANALOG GROUND |
| N/A | 26 | VREF |
| N/A | 27 | CIRCT |
| N/A | 28 | ABAT+ |
| N/A | 29 | ABAT- |
| N/A | 30 | DBAT |
| N/A | 31 | ANALOG GROUND |