Hello.
Today we will learn about measuring resistance
when the Volt o meter is used to measure resistance.
What actually is measured is a small voltage and current applied to the component.
There are five ranges and out of resistance reading will indicate a single one digit.
Remember k means multiple the reading by 1000 operating voltage should be removed from the component
under test.
Or you could damage the Volt or meter at worst all the reading could be false at best.
When measuring these tunnels there is a small voltage supplied by the meter to energize the controller
the red blob.
Lead would have the Positive voltage the Volt on the measure the voltage and current flowing through
the component and the resistance is calculated using arms low which will be converted later.
You can go through the five ranges 200 hundred read up to two hundred ohms two thousand will read up
to 2000 ohm twenty K will lead up to to twenty thousand on and two hundred K will read up to two hundred
thousand ohm while 2000 K read up to two million on or two mega on if their power is removed from the
circuit.
There is little danger that the Volt arm could be damaged.
So you need to remove the ball before starting the test.
Now let's look at an example.
Measuring resistance disconnect the battery from the ball.
Remember to measure resistance.
The Circuit should be unbound both the hundred on resistor in place no additional wires are required.
Select the 200 range and touch the prob leads to either side of that is a store it will read ninety
eight point zero.
Now if we looked here this set of flares the prob leads and observe the reading.
As you can see there is no difference.
It's the same reading ninety eight point zero.
So this means that there is a store doesn't have ability and you can measure at any of these sides.
Now let's take another example where we can discuss those solution using the hundred on the store.
This measure of resistance using each of the other ranges.
This is the two hundred two thousand.
As you can see 0 8 9 and in 2k at 1 taking as you can see zero point one zero the two hundred K zero
zero point one the 2000 case zero zero zero.
So it's like out French and we can't possibly measure that there's a store which is 100 on using that
all mega on a scale.
This will be seriously wrong and we won't get a value.
Not that the solution of their eating decreases as the maximum on reading increase down to the point
where it is difficult to get a good resistance reading which is in this example.
Now if we look at another example as you can see here using the one killer on the stores and the 200
range this is what we get.
We used one kilo arm which is 1000 all.
A much larger than 200 on the end.
So uh it's a blade one which means that that is uh everything that is out of range.
We must find the appropriate range to measuring the one kilo arm.
So if we use the two thousand on reading it will give us nine hundred eighty four.
As you can see here which is the best resolution for measuring the one kid or so you must choose the
resolution wisely.
Otherwise you will get you will get error or you won't get an accurate result.
And this will let's say that this will damage your calculations because you must choose the right resolution.
So you need to try different resolutions to get the best value with as minimum as possible.
Zeros in the left side and in that case the two thousand.
The trick for us now you think you're on the 100 kilometers a store first that amount appropriate range
to use for each resistor.
Second make the resistance measurement.
Third using higher ranges to predict the reading and confirm your prediction by taking damage.
This is a good practice that you should do.
And these are really simple.
Let's say a really simple steps that you can apply now.
Just for fun.
Use the volt meter to measure the resistance of all your different body parts the voltage and current
used by the Volt o meter is not dangerous so you can measure that this that resistance through your
body discuss your observations and how your measurement techniques could influence the readings you
get from the Volt o meter and I think that this is a really fun example.
Practice blobs across individual finned finger or read around one point it make it on probes held between
thumbs and finger one in each hand will measure one point for go on props form the skin on the ankle
and skin on the hand will get you a scale of breathing dry skin vs. moist skin dry one may get warm
moist 96 scale or on lightly touching it probs compared to a free up grasp onto probs light is one may
go home while firm is 300 kilo on the point here is that body contact with the blobs during measurement
can influence the o meter reading and should be avoided practice particularly when measuring high values
of resistance you can bring this up again and try it yourself at home you will know that once you touch
the two blobs it will display resistance so you need to avoid direct contact with the resistance when
measuring it since the this will damage your reading or give you a false reading so please take care
of this very important note when using the volt meter or digital multimeter to measure resistance.
Thanks for watching.
This is education and engineering team.