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3 Phase logging

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3 Phase logging

Postby MartinBuckles » Fri Jun 01, 2012 2:14 pm

Good afternoon,

We have a few TC-08s and an ADC-11 (with an add on board for doing 4-20mA) here and we would like to log a 3 phase supply that we believe may have either a phase dropping out or a voltage fluctuation issue. Can we use either of these loggers to do this? We have a couple of the add on boards for the TC-08 which allow 0-5v input so I can log the phase dropping out with a relay on each phase but this wont tell me if I have a voltage fluctuation issue. Is there a way I can log this please?

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Re: 3 Phase logging

Postby ziko » Mon Jun 11, 2012 8:45 am

Hi Martin,

The TC-08 is too slow, and the ADC11 only measures posative voltages.

You would really need an oscilloscope to asses this really, and then use a differential probe.

The oscilloscope can measure the signals quick enough and give you the negative and posative voltages. The 4424 is a 4 channel oscilloscope and can allow you to measure each of your 3 phases.

http://www.picotech.com/picoscope4000-s ... tions.html

Whilst the differential probe, TA041, will allow you to measure the voltage safely providing isolation.

http://accessories.picotech.com/active- ... html#TA041

How long are you looking to look at this for and are you looking to measure each of the 3 phases?



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