Picoscope 2204A for high voltages and low frequency

Which product is right for your exact requirements
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Marco085514
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Picoscope 2204A for high voltages and low frequency

Post by Marco085514 » Wed May 15, 2019 9:25 am

Dear forum users and tech support,

I plan to purchase the picoscope 2204A for testing prototypes that are fabricated in a small startup. The prototypes output an AC signal with around 600V peak-to-peak and a maximum current of 10-50µA, when plugged to a load resistance of 10MOhm (that is roughly the Maximum Power Point). The frequency should not really play a role. The prototypes are deformed mechnically in a frequency range of 10 Hz or for some acoustic applications maybe up to 10kHz. The specifications seem to be totally fine for my application.

Specifications:
2 Channels
8 bit
10 MHz Bandwidth
100 MS/s Sampling-Rate.
Memory: 8 kS.


What do you think? Probably, I'll later also want to use the same oscope for measuring the power utilized for a MCU-process such as weak-up, measurement of an analogue signal (temperature, humidity or so on) and sending the signal via a tranceiver unit. I've done that before using a more expensive oscope at a 10 Ohm shunt resistance and it worked but looked kind of noisy already.

Best regards and thank you for your help,
Marco

Gerry
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Re: Picoscope 2204A for high voltages and low frequency

Post by Gerry » Mon May 20, 2019 11:14 am

Hi Marco,

If you are saying that the maximum frequency that you need to measure is 10kHz, you don't need to be able to measure more precisely than 1/64th of the pk to pk voltage of your waveform, and you don't need to capture for a period of longer than 100ms, then the PicoScope 2204A will be fine for the capture of your waveforms. You will also need to divide the voltage down to be able to measure it in the PicoScope, however, you need to consider safety when doing this, as follows:

If there is a possibility (under normal operation, or under operation during any kind of fault that could occur) of an impulse being generated that could fall within the voltages specified by the current edition of the IEC 61010-1 specification of "Safety requirements for electrical equipment for measurement, control, and laboratory use", then you will need to use an appropriately CAT rated probe (such as one of this: https://www.picotech.com/accessories/hi ... tial-probe) to divide the voltage down. otherwise you will need a passive 100:1 probe to divide the voltage down.

The measurement of the MCU powering during specific conditions (I assume you meant a wake-up process) will probably need a different data acquisition device. Certainly, if you need more than 2 things to be measured at once (the PicoScope 2204A only has 2 channels), if you need to acquire data for longer than is possible using the 2204A, or if you need additional handling of the sensor inputs, such as temperature compensation, (where the humidity accuracy requires it).

Regards,

Gerry
Gerry
Technical Specialist

Marco085514
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Re: Picoscope 2204A for high voltages and low frequency

Post by Marco085514 » Mon May 20, 2019 11:41 am

Dear Gerry,

Thank you a lot for your answer. It really helped me.

Best,
Marco

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