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danw2's latest activity

  • danw2
    danw2 reacted to jraef's post in the thread What is a Package Starter (PS)? with Like Like.
    It is an uninformed mechanical engineer’s term for a combination starter, ie one that comes in a box with a breaker, control switches...
  • danw2
    danw2 replied to the thread High temp clamp on flow meters.
    An issue with ultrasonic clamp-on in general is whether there is documentation for a medium/material's speed of sound at various working...
  • danw2
    danw2 replied to the thread High temp clamp on flow meters.
    Siemens high temperature metal block sensors, rated to 230 °C (446 °F). pg 2...
  • danw2
    danw2 replied to the thread Pressure Gauge connection Type.
    The last copy of B40.100 (2005) I saw did not specify square or hex dimensions on the gauge stem. The spec sheet for any particular...
    • Wika dimensions-hi.jpg
  • danw2
    danw2 replied to the thread flame sensor.
    flame sensing is a safety circuit that is used to prove flame and has to fail safe. Commercial products pass agency approval. Buy...
  • danw2
    danw2 replied to the thread Two instrumemts, Same Loop.
    Two approaches, either of which will make the cost of running another STP cable out the to the tank look cheap, by comparison. - HART...
  • danw2
    danw2 replied to the thread Trying to figure out cause of malfunction.
    What's the length and size of the cable that melted? Where terminal block did the meltdown occur? Stripped connection to a...
  • danw2
    danw2 replied to the thread Sporadic pump Trip.
    A sump has a wide deadband level switch that turns the pump on at the high point, latches the contact to keep the pump running until the...
  • danw2
    danw2 replied to the thread Help a non-PLC guy with this control application.
    >I think I would need the Advanced Controller then (one with the aux input), correct? The 'advanced' controller would have to be a...
  • danw2
    danw2 replied to the thread Help a non-PLC guy with this control application.
    >Hmm I wonder If I could use one of those "Standard" temperature controllers plus a "dumb" pressure switch like this Dwyer, and put the...
    • Graph of On-off control with example calc.jpg
  • danw2
    danw2 replied to the thread Help a non-PLC guy with this control application.
    Loop controllers differ from PLCs; which is why they're still around and commercially available some decades after PLCs came into being...
  • danw2
    danw2 reacted to georgeverghese's post in the thread P&ID symbol for Dual-Speed Pump with Like Like.
    Looks good to me - instead of the abbreviation FSO, spell it out - Fast / Slow / Off.
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