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What part of the ohms scale of a meter are the most accurate resistance measurements made?
Wiki User
∙ 14y ago
It really depends on what you are trying to get the resistance of. A piece of copper wire 30 feet long will only have a resistance of few ohms. A person can have a resistance of several million ohms. Making sure that your meter's leads are in good contact with whatever you are measuring is the best way to get an accurate reading.
Wiki User
∙ 14y ago
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Scale used in moving coil meter is?
Linear Scale
What are the 5 parts of a Volt Ohm Meter?
Test Prod Scale meter Zero corrector Zero Ohms adjust Scale selector
What does OL indicate in a digital multimeter?
It usually stands for open loop, another way of saying there isn't continuity. Original answer: it means OVER-LIMIT beyond the limits of the meter to register, such as "infinity" on a resistance scale
When you read measurements on an analog multimeter you must look straight at the meter scales in order to prevent what?
Parallax error. Because there is a gap between the needle and scale, looking from either one side or the other of needle will make a difference in the observed reading. In high-end meters there was a general practice of putting a mirror behind a slot in the meter face. If the observer could not see the reflection of the needle in the mirror then the reflection was being obscured by the needle and the observer was perpendicular to, and therefore looking directly at, the scale.
How is The range of an voltmeter is increased?
The easiest way is to put a high resistance in series with the meter.You must know the input resistance of the meter. This is specified in the owner manual.Some meters are specified as having a certain input resistance.If a meter has a 1 Megohm input resistance, you can scale it up by a factor of ten by putting a 9 Megohm resistor in series with one of the probes.Some meters are specified in "ohms per volt".The Ohms/V rating can be different on different scales. If a meter is specified on the 600 volt scale as having "20,000 Ohms per Volt", then this means that the meter's resistance is 20,000 * 600, = 12,000,000 Ohms. 12 Megohms.To expand the meter's 600V scale to 10X the rating (6,000 volts), you would put a 108 megohm resistance in series with the probe. This resistance could be made up of ten 10 Megohm resistors, a 7.5 megohm resistor, and a 470 Ohm resistor. Even though that is only 107.97 megohms, the error is less than 1%.To expand the scale to 2X (1,200V) you would put a 12 megohm resistance in series with the probe.High voltage low power resistor strings can be put inside plastic, glass, or ceramic pipes. Consult the appropriate industry publications for recommendations.warning:Be careful when measuring high voltages. Never work alone.Most simple resistors are not rated for high voltage over 200-500 volts per each resistor and will arc or burn. Injury or death may result.I prefer to hook the "hot" end of the probe to the high voltage test point and let it hang there, and not to hold it by hand. Then I energize the equipment and take the readings. After I am done, I discharge the high voltage and safely remove the probe from the equipment.Poorly made or defective probes have killed people.
At which end of the ohms scale are resistance measurement more reliable the zero end or the infinity end?
On an analog ohmmeter, measurements are more precise and more accurate at the zero end of the scale.
Why the zero of the ohmmeter scale is usually at the right end of the scale and reading increase towards the left?
Because the meter is actually measuring the current through the resistor, and the two quantities ... current and resistance ... are inversely proportional. So when the meter measures more current, it has to read less resistance, whereas higher resistance will result in less current. So the numbers for resistance have to be printed "backwards" on the meter scale.
What scale of resistance does a megohm meter measure?
Mega = million Megaohm = 1000000 Ohms
Is using a body fat meter better than a scale?
Using a body fat meter is so much more accurate than a scale. Scales can be incorrect depending on the time of day.
Two practical requirements for Optimising the accuracy of resistance measurements for a given ohmmeter?
1). Assure a fresh battery in the meter. (A digital ohmmeter with a low battery will often display a reading as if it's the honest truth, when it's actually a completely bogus measurement.) 2). Use the smallest scale possible, i.e. the lowest scale that's larger than the resistance under test.
Why cannot a meter scale be used instead of a vernier calliper?
It can, but the vernier is capable of a more accurate reading.
Why Megger have two ranges ohm and mega ohm?
If you measure a small resistance with the megger set in Mega ohm range you get a very tiny and inaccurate result, and If you measure a huge resistance with the megger set to mega ohm range it will bottom out. To get the most accurate measurements you want what you're measuring to be about the same as the scale you're using.
The Richter scale is based on measurements of?
The Richter scale is based on measurements of *Amplitude*. (^_^)
What are the features of the health o meter weighing scale?
The health o meter weighing scale is used for tracking weight loss and can register your weights to provide you with an idea of your progress. This scale can store up to 4 users at a time and also provides accurate readings.
What additional information is obtained from measurements on an interval scale compared to measurements on an ordinal scale?
whether the measurements are the same or different
What are different laws in measurements?
One of the different laws in measurement is that the scale used has to be standard. Moreover, there are three standard units, the second, kilogram, and the meter.
Why the scale of an ohm meter is non linear?
V = I*R R = V/I If we fix the voltage at 1 then R = I^-1 The change in the resistance scale is the derivative R dr = I^-1 di R dr = -I^-2 R dr = -1/(I^2) Explanation: The change in the resistance measurement decreases by the inverse of the current squared.
