This section describes how to write an experiment with Pychron. A Pychron experiment in Mass Spec parlance is a Multiple Runs Sequence.

Position Rules

The following is a list of rules for how a position entry is interpreted

  1. 4 or p4 (Goto position 4)

  2. 3,4,5 (Goto positions 3,4,5. Treat as one analysis)

  3. 7-12 (Goto positions 7,8,9,10,11,12. Treat as individual analyses)

  4. 7:12 (Same as #3)

  5. 10:16:2 (Goto positions 10,12,14,16. Treat as individual analyses)

  6. D1 (Drill position 1)

  7. T1-2 (Goto named position T1-2 i.e transect 1, point 2)

  8. L3 (Trace path L3)

  9. 1-6;9;11;15-20 (Combination of rules 2. and 3. Treat all positions as individual analyses)

Here are a few examples of how Rule #9 is processed

user_input= 1-6;9

#resulting positions
positions= 1,2,3,4,5,6,9

user_input= 1-3;9;11-13

#resulting positions
positions= 1,2,3,4,5,6,9,11,12,13

The starting position, i.e 1 in the above case, can be greater than the end position i.e 6. If the start > end, positions will decrease from start to end

user_input= 9;6-1

#resulting positions
positions= 9,6,5,4,3,2,1

If auto-increment position is enabled pychron starts incrementing from the last value and follows the same pattern as the rule.

user_input= 1-6;9

#resulting auto-incremented positions
positions= 10-15;18

user_input= 1-6

#resulting auto-incremented positions
positions= 7-12