Actions
Forum Thread Details
  • Replies 26 replies
  • Subscribers 105 subscribers
  • Views 5426 views
  • Users 0 members are here
Related

Hey, Guys, I'm stumped It

phoenixcomm

imageOk, it claims to be a 0.22Ω 3watt power sand resistor, with 3 legs. (so starting at the top and going clockwise, 1 at the top, 2 on the right, and 3 on the left)

My fluke 113 says no it's 0.38Ω between 1 and 2, as well as between 1 and 3, and 0.59/0.60Ω between 2 and 3. 

My HP3435A  set on the 20Ω scale says it's 0.37Ω between 1 and 2, and 0.38Ω between 1 and 3, and 0.59Ω/0.60Ω between 2 and 3.

Something is not right. 

and Please look at the logo, so I can figure out who made the stupid thing..

oh btw the wires go all the way through the body and are about 1" long on the reverse side. 

Thanks again. Cris

Parents

  • Apologies for the bad drawing, I had to do it in MS paint without a stylus/pen.
    Assuming the connections are as shown below
    image

    R12 = R13 = 0.38 ohms
    And R23 = 0.6 ohms.
    However as per the specs, the entire resistor should be 0.22 ohms.
    As mentioned by dowg, if you short 2 and 3, the resistors will be in parallel and value would be 0.38/2 = 0.19 ohms. 

    R23 = 0.6 ohms also makes sense, as both resistors will be in series and so 0.38*2 = 0.76 which is close to 0.6 with not so precision DMM.
    Also, to measure such small resistance values, you would need precision ohmeter/DMM otherwise the lead resistances from the probes will not give you a correct reading.

  • in reply to rsjawale24

    Yes, correct drawing. but go between 1 and 3+2. I end up with 0.27Ω this was done on my HP 3435A on the 20Ω scale this is a true 4-digit meter.  I have a call in to PANASONIC I will let you know how this works out in the end..

    I want to give a big shout-out to everyone that gave me their 2 cents, mostly great stuff. Thanks again, Crazy Cris. 

Reply
  • in reply to rsjawale24

    Yes, correct drawing. but go between 1 and 3+2. I end up with 0.27Ω this was done on my HP 3435A on the 20Ω scale this is a true 4-digit meter.  I have a call in to PANASONIC I will let you know how this works out in the end..

    I want to give a big shout-out to everyone that gave me their 2 cents, mostly great stuff. Thanks again, Crazy Cris. 

Children
No Data