Author Topic: Rigol DHO924S proper ground connection?  (Read 1268 times)

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Offline fleckingerreTopic starter

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Rigol DHO924S proper ground connection?
« on: October 10, 2023, 02:32:14 pm »
Hi!

My new Rigol DHO924S arrived these days. With the extra ground lead, since the new scopes are not grounded directly through the power supply anymore. Now I was wondering what actually is required for this ground connection? The manual isn't very specific and searching with Google just reveals a plethora of tips on "how not to blow your scope".

Is it enough to use a ground plug with 1 MOhm resistance for ESD protection, or does it require a low resistance connection to ground? I found different products and am wondering what is the right choice.

Many greetings!
Remo
 

Online Fungus

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Re: Rigol DHO924S proper ground connection?
« Reply #1 on: October 10, 2023, 03:19:45 pm »
Is it enough to use a ground plug with 1 MOhm resistance for ESD protection, or does it require a low resistance connection to ground? I found different products and am wondering what is the right choice.

It has to be a real ground connection, low impedance.

It's there for your safety in case you clip onto a live mains wire then touch one of the exposed BNC connectors.

It doesn't make any difference to the measurements, it's purely a safety thing when working on dangerous voltages. You don't need it if you're working with Arduinos, etc.
 
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Online 2N3055

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Re: Rigol DHO924S proper ground connection?
« Reply #2 on: October 10, 2023, 05:24:55 pm »
Hi!

My new Rigol DHO924S arrived these days. With the extra ground lead, since the new scopes are not grounded directly through the power supply anymore. Now I was wondering what actually is required for this ground connection? The manual isn't very specific and searching with Google just reveals a plethora of tips on "how not to blow your scope".

Is it enough to use a ground plug with 1 MOhm resistance for ESD protection, or does it require a low resistance connection to ground? I found different products and am wondering what is the right choice.

Many greetings!
Remo

Remo,

Since you are in Austria, just buy a Schuko power plug, connect only ground connector (Yelow-green wire, use multistrand soft wire 1,5mm2 or 2.5mm2 wire area) and plug it in a wall Schuko grounded socket... Connect this wire to grounding point on scope. This is exactly how it is done internally for scopes with built in PSU..

Best,
SiniĊĦa
"Just hard work is not enough - it must be applied sensibly."
Dr. Richard W. Hamming
 


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