[Dsg-hallc_controls] [New Logentry] PT2026 installed in HMS

[beng at jlab.org]

Logentry Text:
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Since we couldn't find any easily accessible locations on the SHMS we installed the NMR probe for the PT2026 on the HMS.

Initially we tried putting the probe on the bottom of the dipole, but the field was to low there to get a lock (Eric estimated 10x less than we needed). After Eric showed us the only location that he thought would get a high enough field reading which was on the top of the dipole Steve had Andy install the probe after we ran the cable. It is now reading close to the value of the existing NMR on the PT2025 (from memory it was ~14027 vs ~14044). This is expected since they're not located in the same position.

The PT2026 unit itself is located under the floor of the HMS hut.

We still need to fabricate a cable to go between a PLC relay channel and the AUX connector so we have the ability to remotely reset the unit as we've already had it freeze up (despite initially only using the vendor supplied software).

Attached is a screenshot of the Python output that as some extra debug information, but showing it can get a lock (took 6 sec, has exponential back-off) and the field output in Guass sampling at 2 Hz (~60x faster than the existing unit). The final data rate has yet to be determined.
[figure:1]

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This is a plain text email for clients that cannot display HTML.  The full logentry can be found online at https://logbooks.jlab.org/entry/3585571
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