PicoScope 7 Software
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10 voltages, only 6 GND sockets
10 voltages, only 6 GND sockets
I purchased a Picolog 1216. I need to measure 10 voltages simultaneously. The voltage range is below 2.5 mV. On the terminal board, i see only six ground sockets. How can I measure ten voltages simultaneously? Is possible to connect one ground to all voltage with for example a breadboard? Any better possibility? Thanks!
Re: 10 voltages, only 6 GND sockets
Hi Jakidos,
Yes, you could use a breadboard or strip board or any terminal block with some tinned copper wire soldered to the pins, or it may be easier to just double up the connections to the on board terminal blocks (if they will fit).
Regards,
Gerry
Yes, you could use a breadboard or strip board or any terminal block with some tinned copper wire soldered to the pins, or it may be easier to just double up the connections to the on board terminal blocks (if they will fit).
Regards,
Gerry
Gerry
Technical Specialist
Technical Specialist
Re: 10 voltages, only 6 GND sockets
What if all the grounds are the same? Could I use a single ground for all inputs? What if the grounds are different for some channels? Can the ADC 1216 handle this?
Can't seen to find this info in the user guides?
Cheers,
Phil
Can't seen to find this info in the user guides?
Cheers,
Phil
Re: 10 voltages, only 6 GND sockets
Hi do0mn0ob,
All the grounds ARE the same (the multiple GND connections on the terminal board are all connected to one point in the PicoLog 1216). So, yes, you can, in theory, use a single ground for all inputs, it just becomes impractical to try and squeeze a number of grounds into the one terminal block from different sources (which is why the Terminal Board has many GND terminal blocks). However, if you have already combined the grounds at the source then just make the one connection to a terminal block.
If the source grounds are different, then, if the difference is large enough, there will be voltages that are supposed to be at ground potential but are instead elevated above or dropped below ground. So,to avoid large ground currents affecting your measurement, you should consider you using a Data Logger with differential inputs, such as the ADC 20 or ADC 24. If you must use the PicoLog 1216 then you would need to use signal conditioning to apply each source voltage (not referenced to true ground) to the input channels, for example you could use an Instrumentation Amplifier (see here: https://www.digikey.com/product-detail/ ... ND/2762244).
Regards,
Gerry
All the grounds ARE the same (the multiple GND connections on the terminal board are all connected to one point in the PicoLog 1216). So, yes, you can, in theory, use a single ground for all inputs, it just becomes impractical to try and squeeze a number of grounds into the one terminal block from different sources (which is why the Terminal Board has many GND terminal blocks). However, if you have already combined the grounds at the source then just make the one connection to a terminal block.
If the source grounds are different, then, if the difference is large enough, there will be voltages that are supposed to be at ground potential but are instead elevated above or dropped below ground. So,to avoid large ground currents affecting your measurement, you should consider you using a Data Logger with differential inputs, such as the ADC 20 or ADC 24. If you must use the PicoLog 1216 then you would need to use signal conditioning to apply each source voltage (not referenced to true ground) to the input channels, for example you could use an Instrumentation Amplifier (see here: https://www.digikey.com/product-detail/ ... ND/2762244).
Regards,
Gerry
Gerry
Technical Specialist
Technical Specialist