sample entry

If the science party decides to run P-MAG cubes for moisture and density (MAD), there are a few quirks of the MAD system that make sample entry for this situation unique.  The following two cases outline sample entry procedures that will create the proper tests so any data generated will be associated with its correct sample ID.

As a general note, both PMAG and MAD samples are potentially destructive to one another.  MAD requires 24 hours of drying at 105 C, but the MAD oven is not magnetically shielded.  On the other hand, thermal demagnetization at high temperatures could remove chemically bonded H2O, thus skewing the MAD calculations for porosity, as well as degrading the sample.

One possible procedure is to have the MAD wet mass and P-Wave measurements taken (after vacuum saturation if needed) then run through the P-Mag lab, then returned to the MAD station for drying as normal.  If magnetic shielding is required, the P-Mag lab can use the thermal demagnetizer at 105 C for 24 hours then return to MAD station for mass and volume determinations.  Whatever is decided, it should be discussed and agreed upon ahead of time by both science groups.

Case One) Scientists have agreed ahead of time to run the cube sample in both labs.

 If it is known ahead of time that samples are to be shared, then PMAG cubes should be entered with MAD as the test, with the name “PMAG_MAD”.  The reason being is the MAD MAX software needs to have its various analyses created ahead of time so they will appear in the main screen.  The PMAG software will create the PMAG test when the analysis is run.

Case Two) Scientists decide to run the cube sample in both labs after it has been entered/run as a PMAG test.

In this case, the physical properties scientist will create the necessary MAD tests by assigning them to the sample directly in the MAD software.  The procedure is as follows;

1)      In the main MAD sample screen click on the button Assign New Samples (Figure 1).

2)      Enter or scan in the text ID and click Verify.  (Figure 2).

3)      Double check the Sample ID, if correct, click Add and select O.K to close the window.  MAD samples can also be removed in this window (Figure 2).

4)      Add the container ID by right-clicking on the Container cell in next to the sample.  Check the sample ID, enter the container ID and click O.K.  If no container is used, enter a zero (Figure 3 & 4).

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Figure 1. Assign New Samples

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Figure 2. Enter text ID, Verify and Add.

Figure 3. Right-Click in Container Field.

Figure 4.  Assigning a Container ID