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Dennis Feucht

# Z Meter on a Chip? Impedance Meter Range Capabilities

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SunitaT0
10/29/2013 3:15:56 AM
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Re : Z Meter on a Chip? Impedance Meter Range Capabilities
The impedance meter test supports the confirmation of distributed amplifier installations and displays detailed info of the associated load. The test consequence displays if the associated speaker system is in decent order in addition to the needed amplifier power-ratio.

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D Feucht
9/30/2013 11:17:22 PM
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Re: A unique Z-Meter application
Hi Steve & Brad,

Steve, your notion of significant power delivery by Z meters can be inferred from the Z-meter range article. To measure low Z (which is where thermocouples are), a high current from the Z-meter is needed to develop a measurable voltage. 100 mA is not uncommon, and I am working on some Z meter designs that use up to 5 A. So Z meters do have some capability for heating a load.

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steve.taranovich
9/30/2013 8:09:02 PM
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Re: A unique Z-Meter application
Hi Brad,

For very high temperatures, the power elements would probably have to be off on a heatsink to drive hefty current---although, class D drivers can run relatively cool and efficient

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B_Albing
9/30/2013 7:42:54 PM
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Re: A unique Z-Meter application
@Steve - I would not have thought that the excitation voltage source on most Z-meters would have sufficient current drive capability to heat up much of anything - but perhaps some do....

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steve.taranovich
9/29/2013 9:36:15 AM
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A unique Z-Meter application
Thanks Dennis for the great tutorial and in-depth mathematical analysis.

I just wanted to comment on a neat use of a Z-Meter: Characterizing a thermoelectric element over a large temperature---The Z-meter can heat the sample to a very high temperature in a vacuum. The Z-meter can then simultaneously measure all three thermoelectric parameters (Seebeck coefficient, thermal conductivity, and electrical conductivity), as well as measure the generated power and the efficiency for a single TE leg.

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