When checking electrical conductivity in a bulk material, we test it by a continuity check mode in a multimeter. How much current does the multimeter drives to your bulk sample? Can you say that your material is an insulator?
Not necessarily an insulator but the system is having a finite resistance. A multimeter beeps only when it is in the lowest resistance limit. Increase the measurement limit and it shows the resistance of the sample. If the sample resistance value show overload, even in the highest resistance range, it can be considered as an insulator (generally). based on the measurement range, the current through the sample changes. Please consult the instrument manual for exact current through the sample in each mode.
If a multimeter does not beep then several alternatives are possible-it may bean insulator or a semi-conductor or there may be a break in the specimen itself. You have to reverse the terminals or probes, then use highest range of resistance and then deduct your conclusion.
Multimeters maximum resistance measurements limit is 10 Mega ohms.No beep means that your resistance is more thant that but it does not mean that your sample is insulator as the resistance of many amorphous semiconductor samples may be much more than that. It may even be Gega ohms.
Yes. Over and above semiconductors there are available higher than 10 MOhms resistances (100,1000 or even higher) used with electrometer devices. One can not measure these with normal multimeters.
Not necessarily. sometimes this beep may be that the device has reached its scaling limit.
Thanks a lot Dear contributors.
Dr. Sales, you have articles, one of them in JAP, in english.
Kindly regards.
not necessarily . some times its a device problem. first check that multimeter. or it may be an insulator or a semi-conductor or there may be a break in the specimen itself.
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