Question about the difference between an ohm-meter and a megger Quick question with a long story for background The question is, shouldn't a megger with it's higher voltage always read a lower resistance across insulation than a standard ohm meter due to the increased current leakage? The background, we had a 480V submersible pump trip it's breaker
Digital Multimeter for resistance | Information by Electrical . . . The ohmmeter reading are actual readings Take my 20K reading of 04 Larry says "For example, if you get a reading of 3 87 with the scale set to 20K, then the resistance is 3 87K ohms So that means my resistance would be 04 ohms, but my reading at the 200 ohm scale was 44 9 ohms
Testing three phase motors - Mike Holts Forum A two-wire ohmmeter won't be accurate enough to detect shorted turns, but a four-wire ohmmeter might Click to expand If you are going behind a two wire ohmmeter, an impedance meter that applies an AC test voltage will be even better at finding a shorter turn
Q2: Design series ohmmeter using PMMC of 1000 internal . . . - bartleby Transcribed Image Text: Q2: Design series ohmmeter using PMMC of 1000 internal resistance and 0 4ma full-scale deflection current The required half-scale deflection is equal to 9kQ [use a battery of 9v] Sketch the internal circuit diagram of the ohmmeter Sketch also roughly the scale of the designed meter
Figuring wire length with a ohmmeter? | Information by Electrical . . . An ordinary ohmmeter won't do it From the ITT "Radio Engineers Handbook" the resistance of #3 Annealed copper wire at 20 C (68 F) is about 0 197 ohms per 1000n ft Thus, your resistance for 600 ft would be about 0 118 ohms To measure this you need a 4 terminal ohmmeter This you can make by connecting a known DC current of about 10 A thru the
Answered: Technician A checks a starter’s field coils for . . . - bartleby Technician A checks a starter’s field coils for opensby connecting an ohmmeter between the coils’power feed wire and the field coil brush lead TechnicianB checks a starter’s field coil for a short toground by connecting an ohmmeter across the fieldcoil brush lead and the starter housing Who iscorrect?a Technician Ab Technician Bc
Answered: The ohmmeter has a full scale deflection current . . . - bartleby The ohmmeter has a full scale deflection current and meter movement resistance of 150uA and 2kn and has 2V supply The open circuit voltage is 20V The ohmmeter is zeroed, and then an unknown resistance is measured and produces a quarter scale deflection current What is the unknown resistance?
Answered: QS A- A series- type ohmmeter, designed to . . . - bartleby QS A- A series- type ohmmeter, designed to operate with a 6V battery, has a circuit diagram as shown in figure below The meter movement has an internal resistance of 2000 Q and requires a current of 100uA for full scale deflection the value of R1 is 49KO a) Assuming the battery voltage has fallen to 5 9V