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AC frequency range of 6221/2182a

2182 Series Support
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luoxue
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AC frequency range of 6221/2182a

Post by luoxue » September 18th, 2012, 8:05 am

Hello, I am planing to order the combination of 6221/2182a. As I know from the datasheet of 6221, it can apply the AC current from 1mHz to 100KHz. My question is could the nanovoltmeter 2182a measure the AC voltage with the similar range if I use 6221 provide it AC current varying from 1mHz to 100KHz?

Dale C
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Re: AC frequency range of 6221/2182a

Post by Dale C » September 18th, 2012, 8:54 am

The Model 2182A is a DC voltmeter.
There is no AC measure function.
How ever the rate of the DC measurement is up to about 100Hz.
If you have a 10Hz signal then you could take 10 readings and calculate the RMS.
This is not a high bandwidth but it is more than DC.

luoxue
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Joined: September 6th, 2012, 5:29 pm
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Re: AC frequency range of 6221/2182a

Post by luoxue » September 18th, 2012, 9:33 am

Thanks for your reply. The experiment I want to do require the experiments that could both apply and measure AC and DC current/voltage. Could you give me some advice about any single or combined equipments offered by Keithley which can meet my requirement?

Dale C
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Re: AC frequency range of 6221/2182a

Post by Dale C » September 18th, 2012, 10:09 am

The Model 6221 can certainly output from 1pA to 100mA up to 100kHz.
And it can output 1pA to 100mA in DC mode.
The Model 2182A is a NanoVoltmeter but just DC.
The Model 2700 is a 6 1/2 digit DMM. it can measure ACV and ACI.
ACV it can measure from about 1mV to 300V up to 300kHz.
ACI is can measure from about 1uA to 3A up to 5kHz.

Will this cover your application?

luoxue
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Joined: September 6th, 2012, 5:29 pm
Country: Canada

Re: AC frequency range of 6221/2182a

Post by luoxue » September 18th, 2012, 11:00 am

Thanks for your reply. It is very useful. Other question is about the combination of 6221 and 2701. Do you think I can connect these two equipments with RS232 and trigger link like 6221/2182? Thus, what I need to do is connect the 6221 and PC with KUSB-488B adapter. If no, does that mean I have to connect these two equipments with my PC separately?

Dale C
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Re: AC frequency range of 6221/2182a

Post by Dale C » September 18th, 2012, 12:34 pm

The Model 6221 and 2701 would not connect together like the 6221/2182A (RS-232 cable and trigger link cable).
You would have to address each separately from your PC.
Not a big problem. Just use GPIB and have separate addresses.
Then write your code to set up the 6221, then 2700.
And go between each instrument sourcing and measuring.

mcdoweln
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Re: AC frequency range of 6221/2182a

Post by mcdoweln » July 2nd, 2013, 12:55 pm

We are planning on converting our DC hall measurement system to AC so we can be more precise with our measurements as we are starting to make compounds that fall outside the resolution of DC. We currently have a 2182A nanovoltmeter and from what it sounds like it is possible to measure AC voltage with this device even though it is only a DC device. We need precise measurements that are beyond the ability of the DMM that keithley provides. Any suggestions on how to approach this problem?

Dale C
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Re: AC frequency range of 6221/2182a

Post by Dale C » July 2nd, 2013, 1:01 pm

To get the fast DCV measurements on the Model 2182A the unit needs to be in fast mode. This severly limits the measurement integrity.
Such as if you are at 0.01 PLC then the 2812A is really only a 4 1/2 digit machine. And that is where you get the 100 reading per second speed.
What I mean by this is on the 10mV range it is only good to about 1uV. (10.000mV).
Will this help?

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