MODIS not reading DC Volts

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  • transman618
    Member
    • Oct 2007
    • 77

    MODIS not reading DC Volts

    MODIS 7.4 This is really the first time using the DC volts meter. I am unable to get any volt readings. It just reads 0 I use the ohm meter quite a bit and it works fine. Any ideas???


    Charles
  • Steve6911
    Moderator
    • Feb 2007
    • 2168

    #2
    Charles

    What channels are you putting the leads into?

    Steve

    Comment

    • transman618
      Member
      • Oct 2007
      • 77

      #3
      Hi Steve,

      I used channels 3 and 4 marked - & + When that didnt work I put the - lead in the GND terminal which still does not work.


      Charles

      Comment

      • Steve6911
        Moderator
        • Feb 2007
        • 2168

        #4
        Time to call tech support 1-800-424-7226

        Comment

        • piper18
          Junior Member
          • Jan 2008
          • 11

          #5
          Voltage is between ground and Channel 1

          Comment

          • MasterWrench
            Senior Member
            • Oct 2006
            • 1186

            #6
            Originally posted by piper18
            Voltage is between ground and Channel 1
            That is correct if you are using dc volts in the labscope. If you are using the graphing meter it is the ones marked "+" and "-".....
            MasterWrench

            Comment

            • transman618
              Member
              • Oct 2007
              • 77

              #7
              You must have been reading my mind........ I got out the MODIS tonight, just right now to try to figure it out. I wasnt paying attention to the bottom of the screen where it says clear as day Ch 1 I moved the leads to channel 1 and GND and it works...... Thank you very much... Makes me feel stupid LOL I'm so used to a regular DVOM where if it has a + and - that would be where you take voltage readings from.....


              Charles

              Comment

              • piper18
                Junior Member
                • Jan 2008
                • 11

                #8
                I'm in the multimeter - Graphing meter - volts DC and its uses Gnd and Ch1. Its the same as Lab scope, This is the way I have always done it and it works.

                Comment

                • MasterWrench
                  Senior Member
                  • Oct 2006
                  • 1186

                  #9
                  I have to wait till I get my MODIS back from repairs to see, but maybe it is the + and - for ohms only......
                  MasterWrench

                  Comment

                  • piper18
                    Junior Member
                    • Jan 2008
                    • 11

                    #10
                    I believe its when you use a probe that applies power to the circuit like ohms and diode test, that you use the + and -

                    Comment

                    • Rich Shepherd
                      Snap-on D&I
                      • Nov 2006
                      • 553

                      #11
                      In current versions of software, Ch3 (-) and Ch4 (+) are only used for Ohms and Diode/Continuity in the Digital meter. In those cases, the left most button on the lower tool bar will display Ch3/4 to indicate which jacks to connect to. All other measurements will use one of the channel jacks and the ground jack. In those cases, the channel jack to connect to will be displayed on the lower toolbar.

                      At one time, Ch3 (-) and Ch4 (+) were also used for Volts in the Digital Meter. Around the 5.4 release, the software was changed to move the Volts measurement in the DM to the Ch1/GND jacks. Using them had some advantages over using the Ch3 (-)/Ch4 (+) jacks and allowed the addition of the Volts DC Average and Volts AC rms measurements which had been requested.
                      The bottom line is that if there is any question as to which jacks to use, refer to the bottom toolbar.

                      Comment

                      • MasterWrench
                        Senior Member
                        • Oct 2006
                        • 1186

                        #12
                        Thanks Rich. I guess that shows how long it's been since I used the graphing meter on my MODIS. I usually use the scope for dc volts....
                        MasterWrench

                        Comment

                        • Dynodave
                          Applications Specialist
                          • Oct 2006
                          • 68

                          #13
                          When to use channel 1 or channels #3 & #4

                          When Using the MODIS for ohms you will need to use channel #3 (-) and channel #4 (+) side. ON the older release you will need to use the same leads for some of the digital scope readings. If you have the newer release in MODIS then channels #3 & #4 are mainly used for Ohms and Diode/Continuity checks.
                          You can always tell by looking at the lower left portion of the screen. It tells you which channel to use. On the newest MODIS release the color displayed will be yellow whenever you need channel one, Red when you need to hookup channels 3/4.
                          Hope this helps,
                          Dynodave

                          Just noticed That Rich Shepherd already gave a great answer. O well it is late. good night.
                          Last edited by Dynodave; 03-07-2008, 01:59 AM. Reason: Did not see Rich Shepherds reply first

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