[Hallb-engineering] [New Logentry] Reservoir Heaters

[beng at jlab.org]

Logentry Text:
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HTR8620 & HTR8672 are now outputting voltage and current (we left it in manual mode at 0%). FYI the percent is based on a max of 40V, i.e. 10% = 4V

Several issues were found and resolved. First the PLC module had the default limits (for a voltage output instead of current and in raw values instead of engineering units), this was limiting the voltage and current set point on the Sorensen to 0V and 0A respectively.

Also the EXTERNAL-OFF DIP switch was in the wrong position. We moved it from ON (up) to DOWN (off). Confusingly this doesn't enable or disable the signal but chooses the active logic. OFF = active-high, ON = active-low.

We verified that with the DIP switch DOWN the output of the supply to the heaters is 0V despite the supply having a voltage setting.

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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/3483899
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