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Thread: Pid Controller Schematic

  1. #101
    Boolit Buddy
    Join Date
    Jun 2014
    Location
    Northern California
    Posts
    488
    Quote Originally Posted by Crankbait View Post
    Bodine,
    I am a new member who is doing a PID project that I will use to control my Lee 20 lb bottom pour pot and to control y Lee 10 lb bottom pour. I am putting 2 Rex C100 controllers in my box along with 2 volt/amp displays. The issue I am having is with wiring my volt/amp display. The volt/amp display has a red and black wire coming from it and it also came with a round I beliee transformer that has 2 green wires coming from it. Each Rex C100 and it's volt/amp display will have an independent power source. Here are a few pictures of my project. Any help would be greatly appreciated. Thanks in advance. Attachment 287522
    I have a similar Volt/Amp meter.
    Red and Black are for the voltage to be measured.
    I would connect those in parallel with the Lee pot.
    Caution here to make sure the meter's input is not exceeded.
    It should handle the 120 vac (or 220 vac) going to the pot.

    That round device is a current transformer.
    Run one lead going to the pot through the center of that Current Transformer.
    The other two wires (green) go to the current input on the Volt/Amp meter.
    That's it.

    Voltage measurements are wired in parallel and current measurements are wired in series with the load.

    Also, that Current Transformer "steps down" the current value to a value that the meter can handle.

    Hope this helps.
    1A - 2A = -1A

  2. #102
    Boolit Grand Master popper's Avatar
    Join Date
    Jun 2011
    Posts
    10,572
    Run one lead going to the pot through the center of that Current Transformer
    CTs are calibrated, should match the meter. If your reading is low you can wrap turns of the hot lead through the core. If the CT is NOT correct for your meter, your reading reading is not of much value. It will tell you if the heating element/SSR is bad (open). Your meter should go between the SSR and the pot, readings will flicker as the SSR goes on and off. One could use an LED/neon 120V test light for the same trouble shooting info.
    Whatever!

  3. #103
    Boolit Mold
    Join Date
    Aug 2021
    Posts
    5
    Quote Originally Posted by Rizzo View Post
    I have a similar Volt/Amp meter.
    Red and Black are for the voltage to be measured.
    I would connect those in parallel with the Lee pot.
    Caution here to make sure the meter's input is not exceeded.
    It should handle the 120 vac (or 220 vac) going to the pot.

    That round device is a current transformer.
    Run one lead going to the pot through the center of that Current Transformer.
    The other two wires (green) go to the current input on the Volt/Amp meter.
    That's it.

    Voltage measurements are wired in parallel and current measurements are wired in series with the load.

    Also, that Current Transformer "steps down" the current value to a value that the meter can handle.

    Hope this helps.
    Thank you for the advice. I haven't hooked up my amp meter yet but my volt meter is working. I poured about 50 lbs of catfishing sinkers tonight with my PID unit. After watching Elvis Ammo's video on setting up his Lee 4/20 with his PID I decided to run my thermocouple to the nut on the pour spout. I am also using an analog lead thermometer in the pot. I am finding that with my PID set to 420 degrees C (788 F) my lead analog thermometer is reading about 825 degrees F, so I seem to have about a roughly 40 degree F offset by running my thermocouple to the pour spout. The Rex C100 seems to keep the temp steady also.

  4. #104
    Boolit Bub
    Join Date
    Mar 2021
    Location
    Missouri ridge runner
    Posts
    59
    Adding one of these to my new Lee 4-20 bottom pour this coming weekend.

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check