Ohmmeters, Physics

ohmmeters:

The use of ohmmeters is somewhat more involved. Most importantly when measuring resistance the circuit power must be switched off, power is derived from within the instrument. Secondly, great care must be taken to ensure there are no parallel paths that would affect the measurement. This is generally best confirmed by removing the component or device, or by disconnecting one end of it from the circuit concerned.

327_ohmmeter.png 
 Thirdly, it is essential that an analogue meter is zeroed before it is used.

To measure resistance, the meter is simply connected across the component or device to be measured. The polarity of the leads is not important unless semiconductor type devices are present. (this will be discussed in a later module).

When making resistance measurement, care must be taken to ensure the correct range is used. It is easy to mistake a low resistance value for a zero reading or short circuit.

 

 

 

Posted Date: 9/13/2012 2:24:54 AM | Location : United States







Related Discussions:- Ohmmeters, Assignment Help, Ask Question on Ohmmeters, Get Answer, Expert's Help, Ohmmeters Discussions

Write discussion on Ohmmeters
Your posts are moderated
Related Questions
Example of an impure spectrum

Q. Illustrate what is balanced field takeoff? Answer:- A balanced field with admiration to aircraft takeoff performance refers to the minimum length of runway that will pe

working and construction of interferometer

Dot Product A Easy demonstration of the relation among the dot product of 2 vectors and the angle among them. Move the slider to view the changes.

is the potential in the cavity of a charged conductor zero

faraday law of induction(differential and integral form)

TEMPERATURE: When the conduction electrons are only scattered by thermal vibrations of thermal ions, then τ in the mobility expression refers to the mean time between scatterin

For a reversible process involving ideal gases in a closed system, show that ΔS = C v ln(T 2 /T 1 ) for a constant volume process ΔS = C p ln(T 2 /T 1 ) for a constant pres

Aiming Above the Monkey Assume a zookeeper must shoot a banana from banana cannon to a monkey who hangs from the limb of a tree. This particular monkey has a habit of dropping