UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - 'Cancelling' part of a meter's impedance?

Argus25 · 5th Dec 2019, 10:29 pm

You might want to consider the % error for your 100:1 divider, with your meter at 11M its nearly ideal for the division ratio which is 11/(1000 +11) 0.0108803, very close to the required 0.01. Think of the % error of this and your meter's error by comparison. But its nice to have it exactly right.

Many scope probes are designed for 1M so typically for a 10:1 probe you have a 9M in the probe head.

5th Dec 2019, 10:29 pm	#3
Argus25 No Longer a Member Join Date: Oct 2016 Location: Maroochydore, Queensland, Australia. Posts: 2,679	Re: 'Cancelling' part of a meter's impedance? You might want to consider the % error for your 100:1 divider, with your meter at 11M its nearly ideal for the division ratio which is 11/(1000 +11) 0.0108803, very close to the required 0.01. Think of the % error of this and your meter's error by comparison. But its nice to have it exactly right. Many scope probes are designed for 1M so typically for a 10:1 probe you have a 9M in the probe head.