Why do LCR meter manufacturers give the details of measurement frequency to us?

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP












5












$begingroup$


When you want to purchase a DMM, more probably you don't see at what frequency the DMM you considered would work, but in the situation you're considering to purchase an LCR meter, manufacturers give you big details on the frequency of the LCR meter.



  1. Why do they give us the details on the frequency of their LCR meter?

  2. It seems that they gives us the measurement frequency for all of three components. Resistors, inductors, and capacitors. Okay, but how the best frequency be chosen for each one of these components?

Here is several links to some LCR manufacturers:



IET/QuadTech 7600 Plus Precision LCR Meter



Lutron LCR-9184



HIOKI IM3536



CEM DT-9935



MS5308










share|improve this question











$endgroup$
















    5












    $begingroup$


    When you want to purchase a DMM, more probably you don't see at what frequency the DMM you considered would work, but in the situation you're considering to purchase an LCR meter, manufacturers give you big details on the frequency of the LCR meter.



    1. Why do they give us the details on the frequency of their LCR meter?

    2. It seems that they gives us the measurement frequency for all of three components. Resistors, inductors, and capacitors. Okay, but how the best frequency be chosen for each one of these components?

    Here is several links to some LCR manufacturers:



    IET/QuadTech 7600 Plus Precision LCR Meter



    Lutron LCR-9184



    HIOKI IM3536



    CEM DT-9935



    MS5308










    share|improve this question











    $endgroup$














      5












      5








      5





      $begingroup$


      When you want to purchase a DMM, more probably you don't see at what frequency the DMM you considered would work, but in the situation you're considering to purchase an LCR meter, manufacturers give you big details on the frequency of the LCR meter.



      1. Why do they give us the details on the frequency of their LCR meter?

      2. It seems that they gives us the measurement frequency for all of three components. Resistors, inductors, and capacitors. Okay, but how the best frequency be chosen for each one of these components?

      Here is several links to some LCR manufacturers:



      IET/QuadTech 7600 Plus Precision LCR Meter



      Lutron LCR-9184



      HIOKI IM3536



      CEM DT-9935



      MS5308










      share|improve this question











      $endgroup$




      When you want to purchase a DMM, more probably you don't see at what frequency the DMM you considered would work, but in the situation you're considering to purchase an LCR meter, manufacturers give you big details on the frequency of the LCR meter.



      1. Why do they give us the details on the frequency of their LCR meter?

      2. It seems that they gives us the measurement frequency for all of three components. Resistors, inductors, and capacitors. Okay, but how the best frequency be chosen for each one of these components?

      Here is several links to some LCR manufacturers:



      IET/QuadTech 7600 Plus Precision LCR Meter



      Lutron LCR-9184



      HIOKI IM3536



      CEM DT-9935



      MS5308







      measurement multimeter tools instrumentation lcr-meter






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Jan 15 at 20:43









      laptop2d

      24.2k123276




      24.2k123276










      asked Jan 15 at 9:15









      RohRoh

      2,83252767




      2,83252767




















          4 Answers
          4






          active

          oldest

          votes


















          11












          $begingroup$

          They give you the details, because for real-world components there isn't one concrete value; they are all dependent on the operating frequency to a greater or lesser extent.



          The best frequency will depend on your application. Ideally it would be the same as your target operating frequency.



          For example, if you are measuring an SMPS inductor then a high frequency will be more useful (as your circuit operating frequency is likely to be high), an electrolytic capacitor would be best measured at a lower frequency (as they don't have, and you wouldn't design expecting them to have, good high-frequency performance) and a line-frequency choke would be best measured even lower.






          share|improve this answer











          $endgroup$








          • 2




            $begingroup$
            And the good stuff (HP 4192A and the like) often have programmable frequency over a fairly large range, there is significant value in this capability given the (sometimes very) non ideal behaviour of real parts.
            $endgroup$
            – Dan Mills
            Jan 15 at 15:32


















          7












          $begingroup$

          If we consider a real inductor there are several factors to take into consideration.



          • The windings have resistance


          • There is capacitance between turns


          • The permeability of the core is frequency dependent.


          As such, trying to produce a single figure for inductance is difficult and the result will vary depending on the measurement frequency.



          Similar arguments exist for why a capacitor or resistor is frequency dependent too.



          Since the answer varies with frequency the manufacturer has to tell you the test frequency.






          share|improve this answer











          $endgroup$




















            4












            $begingroup$

            It is a matter of the expected user knowledge and the intended market.



            Any good DMM will specify very clearly what is the operating frequency range, the measured signal characteristics, and the DMM parasitics. Some DMMs even have 'fast displays' that operate at a different bandwidth than the slower digits, these will be clearly specified in the marketing material itself. Some markings will only be understood by the experienced user, e.g.: "True RMS".



            So it is not true that DMMs don't specify these characteristics, look at the low-end general purpose Fluke 114 marketing pamphlet. It is clearly seen that it is designed for signals below 1kHz. Although they do not specify loading impedance, you can go to the user's manual to find that. (BTW: the models just above this one, 115 & 117, measure capacitance by applying a known charge and measuring voltage, these do not use a frequency sweep).



            But this is a general-purpose low-cost (for a Fluke) automotive and household multimeter, it is not really intended for the electronics professional. If you look further up their extensive and expensive DMM product line you will find more detailed and specialized specifications, geared towards one market or another.



            When it comes to an inductor or capacitor these are far from ideal components, their actual value will depend on many factors. Temperature, DC bias, applied signal magnitude, and yes, test frequency. Depending on the application some of these factors will be important while others will not. Test instruments are designed with these factors in mind.



            That is, the instrument specifications will strongly depend on the intended market. The market for most LCR meters is not your common household as it is the case for the cheaper DMMs. You cannot really compare a $10 disposable multimeter with a $6000 professional LCR meter.






            share|improve this answer









            $endgroup$




















              0












              $begingroup$

              When you look at manufacturer's specifications for inductance you will sometimes see odd-ball test frequencies. e.g. 7.7 MHz, 25 MHz, 2.5 MHz. These are an artifact of the old Boonton/Hewlett Packard Q-meter. In the old Q-meter you measured inductance by determining the resonance point of the test inductance with a variable capacitor. The dial on the variable capacitor was calibrated in picofarads. But in addition, the dial was calibrated in inductance (mH, uH, nH). The calibration for inductance was only good at specific frequencies. So at 2.5 MHz the dial would show 100pF as well as 40.6uH. These would be another set of inductance numbers on the dial for 7.7 MHz (4.3uH).






              share|improve this answer









              $endgroup$












                Your Answer





                StackExchange.ifUsing("editor", function ()
                return StackExchange.using("mathjaxEditing", function ()
                StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix)
                StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["\$", "\$"]]);
                );
                );
                , "mathjax-editing");

                StackExchange.ifUsing("editor", function ()
                return StackExchange.using("schematics", function ()
                StackExchange.schematics.init();
                );
                , "cicuitlab");

                StackExchange.ready(function()
                var channelOptions =
                tags: "".split(" "),
                id: "135"
                ;
                initTagRenderer("".split(" "), "".split(" "), channelOptions);

                StackExchange.using("externalEditor", function()
                // Have to fire editor after snippets, if snippets enabled
                if (StackExchange.settings.snippets.snippetsEnabled)
                StackExchange.using("snippets", function()
                createEditor();
                );

                else
                createEditor();

                );

                function createEditor()
                StackExchange.prepareEditor(
                heartbeatType: 'answer',
                autoActivateHeartbeat: false,
                convertImagesToLinks: false,
                noModals: true,
                showLowRepImageUploadWarning: true,
                reputationToPostImages: null,
                bindNavPrevention: true,
                postfix: "",
                imageUploader:
                brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
                contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
                allowUrls: true
                ,
                onDemand: true,
                discardSelector: ".discard-answer"
                ,immediatelyShowMarkdownHelp:true
                );



                );













                draft saved

                draft discarded


















                StackExchange.ready(
                function ()
                StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2felectronics.stackexchange.com%2fquestions%2f417067%2fwhy-do-lcr-meter-manufacturers-give-the-details-of-measurement-frequency-to-us%23new-answer', 'question_page');

                );

                Post as a guest















                Required, but never shown

























                4 Answers
                4






                active

                oldest

                votes








                4 Answers
                4






                active

                oldest

                votes









                active

                oldest

                votes






                active

                oldest

                votes









                11












                $begingroup$

                They give you the details, because for real-world components there isn't one concrete value; they are all dependent on the operating frequency to a greater or lesser extent.



                The best frequency will depend on your application. Ideally it would be the same as your target operating frequency.



                For example, if you are measuring an SMPS inductor then a high frequency will be more useful (as your circuit operating frequency is likely to be high), an electrolytic capacitor would be best measured at a lower frequency (as they don't have, and you wouldn't design expecting them to have, good high-frequency performance) and a line-frequency choke would be best measured even lower.






                share|improve this answer











                $endgroup$








                • 2




                  $begingroup$
                  And the good stuff (HP 4192A and the like) often have programmable frequency over a fairly large range, there is significant value in this capability given the (sometimes very) non ideal behaviour of real parts.
                  $endgroup$
                  – Dan Mills
                  Jan 15 at 15:32















                11












                $begingroup$

                They give you the details, because for real-world components there isn't one concrete value; they are all dependent on the operating frequency to a greater or lesser extent.



                The best frequency will depend on your application. Ideally it would be the same as your target operating frequency.



                For example, if you are measuring an SMPS inductor then a high frequency will be more useful (as your circuit operating frequency is likely to be high), an electrolytic capacitor would be best measured at a lower frequency (as they don't have, and you wouldn't design expecting them to have, good high-frequency performance) and a line-frequency choke would be best measured even lower.






                share|improve this answer











                $endgroup$








                • 2




                  $begingroup$
                  And the good stuff (HP 4192A and the like) often have programmable frequency over a fairly large range, there is significant value in this capability given the (sometimes very) non ideal behaviour of real parts.
                  $endgroup$
                  – Dan Mills
                  Jan 15 at 15:32













                11












                11








                11





                $begingroup$

                They give you the details, because for real-world components there isn't one concrete value; they are all dependent on the operating frequency to a greater or lesser extent.



                The best frequency will depend on your application. Ideally it would be the same as your target operating frequency.



                For example, if you are measuring an SMPS inductor then a high frequency will be more useful (as your circuit operating frequency is likely to be high), an electrolytic capacitor would be best measured at a lower frequency (as they don't have, and you wouldn't design expecting them to have, good high-frequency performance) and a line-frequency choke would be best measured even lower.






                share|improve this answer











                $endgroup$



                They give you the details, because for real-world components there isn't one concrete value; they are all dependent on the operating frequency to a greater or lesser extent.



                The best frequency will depend on your application. Ideally it would be the same as your target operating frequency.



                For example, if you are measuring an SMPS inductor then a high frequency will be more useful (as your circuit operating frequency is likely to be high), an electrolytic capacitor would be best measured at a lower frequency (as they don't have, and you wouldn't design expecting them to have, good high-frequency performance) and a line-frequency choke would be best measured even lower.







                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited Jan 15 at 20:37









                Peter Mortensen

                1,60031422




                1,60031422










                answered Jan 15 at 9:30









                CursorkeysCursorkeys

                31018




                31018







                • 2




                  $begingroup$
                  And the good stuff (HP 4192A and the like) often have programmable frequency over a fairly large range, there is significant value in this capability given the (sometimes very) non ideal behaviour of real parts.
                  $endgroup$
                  – Dan Mills
                  Jan 15 at 15:32












                • 2




                  $begingroup$
                  And the good stuff (HP 4192A and the like) often have programmable frequency over a fairly large range, there is significant value in this capability given the (sometimes very) non ideal behaviour of real parts.
                  $endgroup$
                  – Dan Mills
                  Jan 15 at 15:32







                2




                2




                $begingroup$
                And the good stuff (HP 4192A and the like) often have programmable frequency over a fairly large range, there is significant value in this capability given the (sometimes very) non ideal behaviour of real parts.
                $endgroup$
                – Dan Mills
                Jan 15 at 15:32




                $begingroup$
                And the good stuff (HP 4192A and the like) often have programmable frequency over a fairly large range, there is significant value in this capability given the (sometimes very) non ideal behaviour of real parts.
                $endgroup$
                – Dan Mills
                Jan 15 at 15:32













                7












                $begingroup$

                If we consider a real inductor there are several factors to take into consideration.



                • The windings have resistance


                • There is capacitance between turns


                • The permeability of the core is frequency dependent.


                As such, trying to produce a single figure for inductance is difficult and the result will vary depending on the measurement frequency.



                Similar arguments exist for why a capacitor or resistor is frequency dependent too.



                Since the answer varies with frequency the manufacturer has to tell you the test frequency.






                share|improve this answer











                $endgroup$

















                  7












                  $begingroup$

                  If we consider a real inductor there are several factors to take into consideration.



                  • The windings have resistance


                  • There is capacitance between turns


                  • The permeability of the core is frequency dependent.


                  As such, trying to produce a single figure for inductance is difficult and the result will vary depending on the measurement frequency.



                  Similar arguments exist for why a capacitor or resistor is frequency dependent too.



                  Since the answer varies with frequency the manufacturer has to tell you the test frequency.






                  share|improve this answer











                  $endgroup$















                    7












                    7








                    7





                    $begingroup$

                    If we consider a real inductor there are several factors to take into consideration.



                    • The windings have resistance


                    • There is capacitance between turns


                    • The permeability of the core is frequency dependent.


                    As such, trying to produce a single figure for inductance is difficult and the result will vary depending on the measurement frequency.



                    Similar arguments exist for why a capacitor or resistor is frequency dependent too.



                    Since the answer varies with frequency the manufacturer has to tell you the test frequency.






                    share|improve this answer











                    $endgroup$



                    If we consider a real inductor there are several factors to take into consideration.



                    • The windings have resistance


                    • There is capacitance between turns


                    • The permeability of the core is frequency dependent.


                    As such, trying to produce a single figure for inductance is difficult and the result will vary depending on the measurement frequency.



                    Similar arguments exist for why a capacitor or resistor is frequency dependent too.



                    Since the answer varies with frequency the manufacturer has to tell you the test frequency.







                    share|improve this answer














                    share|improve this answer



                    share|improve this answer








                    edited Jan 15 at 21:48









                    Peter Mortensen

                    1,60031422




                    1,60031422










                    answered Jan 15 at 10:16









                    Warren HillWarren Hill

                    3,3641026




                    3,3641026





















                        4












                        $begingroup$

                        It is a matter of the expected user knowledge and the intended market.



                        Any good DMM will specify very clearly what is the operating frequency range, the measured signal characteristics, and the DMM parasitics. Some DMMs even have 'fast displays' that operate at a different bandwidth than the slower digits, these will be clearly specified in the marketing material itself. Some markings will only be understood by the experienced user, e.g.: "True RMS".



                        So it is not true that DMMs don't specify these characteristics, look at the low-end general purpose Fluke 114 marketing pamphlet. It is clearly seen that it is designed for signals below 1kHz. Although they do not specify loading impedance, you can go to the user's manual to find that. (BTW: the models just above this one, 115 & 117, measure capacitance by applying a known charge and measuring voltage, these do not use a frequency sweep).



                        But this is a general-purpose low-cost (for a Fluke) automotive and household multimeter, it is not really intended for the electronics professional. If you look further up their extensive and expensive DMM product line you will find more detailed and specialized specifications, geared towards one market or another.



                        When it comes to an inductor or capacitor these are far from ideal components, their actual value will depend on many factors. Temperature, DC bias, applied signal magnitude, and yes, test frequency. Depending on the application some of these factors will be important while others will not. Test instruments are designed with these factors in mind.



                        That is, the instrument specifications will strongly depend on the intended market. The market for most LCR meters is not your common household as it is the case for the cheaper DMMs. You cannot really compare a $10 disposable multimeter with a $6000 professional LCR meter.






                        share|improve this answer









                        $endgroup$

















                          4












                          $begingroup$

                          It is a matter of the expected user knowledge and the intended market.



                          Any good DMM will specify very clearly what is the operating frequency range, the measured signal characteristics, and the DMM parasitics. Some DMMs even have 'fast displays' that operate at a different bandwidth than the slower digits, these will be clearly specified in the marketing material itself. Some markings will only be understood by the experienced user, e.g.: "True RMS".



                          So it is not true that DMMs don't specify these characteristics, look at the low-end general purpose Fluke 114 marketing pamphlet. It is clearly seen that it is designed for signals below 1kHz. Although they do not specify loading impedance, you can go to the user's manual to find that. (BTW: the models just above this one, 115 & 117, measure capacitance by applying a known charge and measuring voltage, these do not use a frequency sweep).



                          But this is a general-purpose low-cost (for a Fluke) automotive and household multimeter, it is not really intended for the electronics professional. If you look further up their extensive and expensive DMM product line you will find more detailed and specialized specifications, geared towards one market or another.



                          When it comes to an inductor or capacitor these are far from ideal components, their actual value will depend on many factors. Temperature, DC bias, applied signal magnitude, and yes, test frequency. Depending on the application some of these factors will be important while others will not. Test instruments are designed with these factors in mind.



                          That is, the instrument specifications will strongly depend on the intended market. The market for most LCR meters is not your common household as it is the case for the cheaper DMMs. You cannot really compare a $10 disposable multimeter with a $6000 professional LCR meter.






                          share|improve this answer









                          $endgroup$















                            4












                            4








                            4





                            $begingroup$

                            It is a matter of the expected user knowledge and the intended market.



                            Any good DMM will specify very clearly what is the operating frequency range, the measured signal characteristics, and the DMM parasitics. Some DMMs even have 'fast displays' that operate at a different bandwidth than the slower digits, these will be clearly specified in the marketing material itself. Some markings will only be understood by the experienced user, e.g.: "True RMS".



                            So it is not true that DMMs don't specify these characteristics, look at the low-end general purpose Fluke 114 marketing pamphlet. It is clearly seen that it is designed for signals below 1kHz. Although they do not specify loading impedance, you can go to the user's manual to find that. (BTW: the models just above this one, 115 & 117, measure capacitance by applying a known charge and measuring voltage, these do not use a frequency sweep).



                            But this is a general-purpose low-cost (for a Fluke) automotive and household multimeter, it is not really intended for the electronics professional. If you look further up their extensive and expensive DMM product line you will find more detailed and specialized specifications, geared towards one market or another.



                            When it comes to an inductor or capacitor these are far from ideal components, their actual value will depend on many factors. Temperature, DC bias, applied signal magnitude, and yes, test frequency. Depending on the application some of these factors will be important while others will not. Test instruments are designed with these factors in mind.



                            That is, the instrument specifications will strongly depend on the intended market. The market for most LCR meters is not your common household as it is the case for the cheaper DMMs. You cannot really compare a $10 disposable multimeter with a $6000 professional LCR meter.






                            share|improve this answer









                            $endgroup$



                            It is a matter of the expected user knowledge and the intended market.



                            Any good DMM will specify very clearly what is the operating frequency range, the measured signal characteristics, and the DMM parasitics. Some DMMs even have 'fast displays' that operate at a different bandwidth than the slower digits, these will be clearly specified in the marketing material itself. Some markings will only be understood by the experienced user, e.g.: "True RMS".



                            So it is not true that DMMs don't specify these characteristics, look at the low-end general purpose Fluke 114 marketing pamphlet. It is clearly seen that it is designed for signals below 1kHz. Although they do not specify loading impedance, you can go to the user's manual to find that. (BTW: the models just above this one, 115 & 117, measure capacitance by applying a known charge and measuring voltage, these do not use a frequency sweep).



                            But this is a general-purpose low-cost (for a Fluke) automotive and household multimeter, it is not really intended for the electronics professional. If you look further up their extensive and expensive DMM product line you will find more detailed and specialized specifications, geared towards one market or another.



                            When it comes to an inductor or capacitor these are far from ideal components, their actual value will depend on many factors. Temperature, DC bias, applied signal magnitude, and yes, test frequency. Depending on the application some of these factors will be important while others will not. Test instruments are designed with these factors in mind.



                            That is, the instrument specifications will strongly depend on the intended market. The market for most LCR meters is not your common household as it is the case for the cheaper DMMs. You cannot really compare a $10 disposable multimeter with a $6000 professional LCR meter.







                            share|improve this answer












                            share|improve this answer



                            share|improve this answer










                            answered Jan 15 at 21:34









                            Edgar BrownEdgar Brown

                            4,1911728




                            4,1911728





















                                0












                                $begingroup$

                                When you look at manufacturer's specifications for inductance you will sometimes see odd-ball test frequencies. e.g. 7.7 MHz, 25 MHz, 2.5 MHz. These are an artifact of the old Boonton/Hewlett Packard Q-meter. In the old Q-meter you measured inductance by determining the resonance point of the test inductance with a variable capacitor. The dial on the variable capacitor was calibrated in picofarads. But in addition, the dial was calibrated in inductance (mH, uH, nH). The calibration for inductance was only good at specific frequencies. So at 2.5 MHz the dial would show 100pF as well as 40.6uH. These would be another set of inductance numbers on the dial for 7.7 MHz (4.3uH).






                                share|improve this answer









                                $endgroup$

















                                  0












                                  $begingroup$

                                  When you look at manufacturer's specifications for inductance you will sometimes see odd-ball test frequencies. e.g. 7.7 MHz, 25 MHz, 2.5 MHz. These are an artifact of the old Boonton/Hewlett Packard Q-meter. In the old Q-meter you measured inductance by determining the resonance point of the test inductance with a variable capacitor. The dial on the variable capacitor was calibrated in picofarads. But in addition, the dial was calibrated in inductance (mH, uH, nH). The calibration for inductance was only good at specific frequencies. So at 2.5 MHz the dial would show 100pF as well as 40.6uH. These would be another set of inductance numbers on the dial for 7.7 MHz (4.3uH).






                                  share|improve this answer









                                  $endgroup$















                                    0












                                    0








                                    0





                                    $begingroup$

                                    When you look at manufacturer's specifications for inductance you will sometimes see odd-ball test frequencies. e.g. 7.7 MHz, 25 MHz, 2.5 MHz. These are an artifact of the old Boonton/Hewlett Packard Q-meter. In the old Q-meter you measured inductance by determining the resonance point of the test inductance with a variable capacitor. The dial on the variable capacitor was calibrated in picofarads. But in addition, the dial was calibrated in inductance (mH, uH, nH). The calibration for inductance was only good at specific frequencies. So at 2.5 MHz the dial would show 100pF as well as 40.6uH. These would be another set of inductance numbers on the dial for 7.7 MHz (4.3uH).






                                    share|improve this answer









                                    $endgroup$



                                    When you look at manufacturer's specifications for inductance you will sometimes see odd-ball test frequencies. e.g. 7.7 MHz, 25 MHz, 2.5 MHz. These are an artifact of the old Boonton/Hewlett Packard Q-meter. In the old Q-meter you measured inductance by determining the resonance point of the test inductance with a variable capacitor. The dial on the variable capacitor was calibrated in picofarads. But in addition, the dial was calibrated in inductance (mH, uH, nH). The calibration for inductance was only good at specific frequencies. So at 2.5 MHz the dial would show 100pF as well as 40.6uH. These would be another set of inductance numbers on the dial for 7.7 MHz (4.3uH).







                                    share|improve this answer












                                    share|improve this answer



                                    share|improve this answer










                                    answered Jan 16 at 1:51









                                    Tom MillerTom Miller

                                    1




                                    1



























                                        draft saved

                                        draft discarded
















































                                        Thanks for contributing an answer to Electrical Engineering Stack Exchange!


                                        • Please be sure to answer the question. Provide details and share your research!

                                        But avoid


                                        • Asking for help, clarification, or responding to other answers.

                                        • Making statements based on opinion; back them up with references or personal experience.

                                        Use MathJax to format equations. MathJax reference.


                                        To learn more, see our tips on writing great answers.




                                        draft saved


                                        draft discarded














                                        StackExchange.ready(
                                        function ()
                                        StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2felectronics.stackexchange.com%2fquestions%2f417067%2fwhy-do-lcr-meter-manufacturers-give-the-details-of-measurement-frequency-to-us%23new-answer', 'question_page');

                                        );

                                        Post as a guest















                                        Required, but never shown





















































                                        Required, but never shown














                                        Required, but never shown












                                        Required, but never shown







                                        Required, but never shown

































                                        Required, but never shown














                                        Required, but never shown












                                        Required, but never shown







                                        Required, but never shown






                                        Popular posts from this blog

                                        How to check contact read email or not when send email to Individual?

                                        Displaying single band from multi-band raster using QGIS

                                        How many registers does an x86_64 CPU actually have?