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The data item is taken from the ith data point and the jth data column. If no datum is taken the returned value is NIL.
| Result |
REAL or |
The returned value. | |
| NIL |
No datum acquired yet. |
||
| PointNum |
INDEX or |
Point number, zero-based. If PointNum is out of range, a value from the last or acquired point is returned. | |
| NIL | Always return a value from the last acquired point. | ||
| ColNumber | INDEX |
A code identifying the column to be used. Use these predefined constants: IVT_T = Time IVT_Vf = Applied voltage IVT_Vu = Uncompensated voltage IVT_Im = Measured current IVT_Am = Measured voltage Aux Channel IVT_Sig = Signal sent to control amplifier |