Results 1 to 8 of 8

Thread: DC amps

  1. #1
    Join Date
    Apr 2019
    Posts
    8
    Post Likes

    DC amps

    Hi all,

    Im new to the forum and new to HVAC as well. Im looking for a good clamp meter. I have the Fluke 324 and 325 in my sights. I already have a Fluke 116 as well. My only hang up is, how likely am I to need to measure DC amps in the HVAC trade?


    Sent from my iPhone using Tapatalk Pro

  2. #2
    Join Date
    Aug 2013
    Location
    Visalia California 93291
    Posts
    7,708
    Post Likes
    Quote Originally Posted by leathermaneod View Post
    Hi all,

    I’m new to the forum and new to HVAC as well. I’m looking for a good clamp meter. I have the Fluke 324 and 325 in my sights. I already have a Fluke 116 as well. My only hang up is, how likely am I to need to measure DC amps in the HVAC trade?


    Sent from my iPhone using Tapatalk Pro
    Can be very likely, especially if you move into controls..........flame sensing is in micro amps

  3. Likes leathermaneod liked this post
  4. #3
    Join Date
    Apr 2019
    Posts
    8
    Post Likes
    Thread Starter
    Quote Originally Posted by lkapigian View Post
    Can be very likely, especially if you move into controls..........flame sensing is in micro amps
    Thank you for the reply! I read a bit about the flame sensor testing since my 116 has that function. Would I need an amp clamp for control related measurements, or a dmm that can measure dc amps?


    Sent from my iPhone using Tapatalk Pro

  5. #4
    Join Date
    Aug 2013
    Location
    Visalia California 93291
    Posts
    7,708
    Post Likes
    Quote Originally Posted by leathermaneod View Post
    Thank you for the reply! I read a bit about the flame sensor testing since my 116 has that function. Would I need an amp clamp for control related measurements, or a dmm that can measure dc amps?


    Sent from my iPhone using Tapatalk Pro
    dmm for me

  6. Likes leathermaneod liked this post
  7. #5
    Join Date
    Apr 2003
    Location
    Greenback, Tennessee
    Posts
    973
    Post Likes
    Quote Originally Posted by leathermaneod View Post
    Hi all,

    how likely am I to need to measure DC amps in the HVAC trade?


    Sent from my iPhone using Tapatalk Pro
    For residential/light commercial you will not need a clamp for DC current.
    -Marty

  8. #6
    Join Date
    Dec 2012
    Location
    columbus, OH
    Posts
    6,951
    Post Likes
    All of the inverter type stuff that is dc can be measured using the ac amp function on your meter. It acts as an ac sine with half the wave missing.

  9. #7
    Join Date
    May 2018
    Posts
    102
    Post Likes
    Yes, it's pretty important. I don't like buying a meter that can't do most, if not all, of the functions I normally need. Sometimes it's just not possible to find such a meter, but usually you can come really close, you'll have to look around. I can give you some clues.
    Fieldpiece meters are top notch and have nearly all anyone could ask for. Klein CL450 has it all, Amprobe ACD-14-Pro has all but dc millivolts to check thermocouples. Same with the ACD-51-NAV, but it has a killer screen, does watts and pf, and is a cat IV meter. Just a few ideas.
    Don't ever underestimate the need for a clamp meter, it can be used in all kinds of ways. It's nice to be able to be on a rooftop and check the amps on a "supposedly" running fan and be able to confirm it is actually drawing current. Motor starting checks are also handy as a shirt pocket.

  10. #8
    Join Date
    Jun 2012
    Location
    Northern NV
    Posts
    1,971
    Post Likes
    Not too likely that in HVAC or Refrig that you will be working with DC current above the inline DCA capacity of most meters.

    If you were to get into Solar, wind, battery storage and power inverters, that'd be a different story.....
    A dying culture invariably exhibits personal rudeness. Bad manners. Lack of consideration for others in minor matters. A loss of politeness, of gentle manners, is more significant than is a riot.
    ― Robert A. Heinlein

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •