I have asked a question about this before... but... I just bought a new instek oscilloscope... I would like to use it for biasing tubes in a guitar amp... I purchased a dummy load which has a bnc output for an oscilloscope... so my question is... This scope says it can handle 300V max... but is that 300V with the probes turned to 10x?... The reason I am asking this is because I wanted to buy a bnc to bnc connector... but if the dummy load has say.. 100V on the output to the oscilloscope and the connectors are only 1x... I didn't want to burn anything up..
Sorry .. a bit hard to explain....
Using the 100x probe from DX (rated for 1200v) should be safe to measure 1kv source ?
So let me see if I understand correctly.
The Rigol 1052E is rated for 300V input. That means I can measure maximum 300V with a 1x probe , 3kV with a 10x probe and 30kv with a 100x probe?
I purchased a dummy load which has a bnc output for an oscilloscope... but if the dummy load has say.. 100V on the output to the oscilloscope
Whatever you do, do not get this DX probe
http://www.dealextreme.com/p/high-voltage-probe-for-oscilloscope-1-1m-cable-34519
It's got no attenuation at all, if you wire it up to your oscilloscope and try to measure 30kV you will put 30kV directly into your oscilloscope.
Or.. if you do try it, make sure you make a video so we can watch the sparks
Personally I would never trust any probe from DX that says its rated for more than 300V.
DX deal in ultra cheap items, not the sort of place you want to buy anything that requires quality to be safe to use.
Using the 100x probe from DX (rated for 1200v) should be safe to measure 1kv source ?
No, because you don't know if the unknown manufacturer just pulled the rating out of his ass, or if it is real.
If you talk about this probe http://www.dealextreme.com/p/250mhz-oscilloscope-probe-max-1200v-35610 , just note that they don't have any special hand guard, which would be my second reason not to trust it.
Further, typically the voltage rating depends on the frequency of the input signal. It goes down with frequency. There is no such information about this on the DX website, maybe it comes with the probe. But already because this is missing on the website I wouldn't trust the probe. Strike three, and out.
But if you don't have enough, note the BNC plug is not isolated. That should work, if your scope is properly grounded and if you connect everything properly and in the right order. But if you e.g. first connect the probe to the DUT, if you mix up signal and ground, and if you then touch the plug to connect it to the scope ...
So I order one anyway.
So I order one anyway.
So you don't want to listen but just waste our time.
So I order one anyway.
So you don't want to listen but just waste our time.
The probe xian is getting is the 100X Oscilloscope probe,not the very dangerous so-called HV probe.
I have asked a question about this before... but... I just bought a new instek oscilloscope... I would like to use it for biasing tubes in a guitar amp... I purchased a dummy load which has a bnc output for an oscilloscope... so my question is... This scope says it can handle 300V max... but is that 300V with the probes turned to 10x?... The reason I am asking this is because I wanted to buy a bnc to bnc connector... but if the dummy load has say.. 100V on the output to the oscilloscope and the connectors are only 1x... I didn't want to burn anything up..
Sorry .. a bit hard to explain....
So I order one anyway.
So you don't want to listen but just waste our time.
The probe xian is getting is the 100X Oscilloscope probe,not the very dangerous so-called HV probe.
I know. But again, why is the idiot asking if he doesn't listen?
ask for advice, and free to decide wether or not to follow it. Otherwise it won't be an advice, it would be an order.
With wifey,it is an order!!
VK6ZGO
I know. But again, why is the idiot asking if he doesn't listen?
If you are in doubt about the ability of the probe to handle voltages of this order,a test jig could be made up,with a BNC
mounted in a diecast box with a solid mains earth,& a voltage divider across it totalling 1Mohm,but with a lower level
tap that a DMM or X1 probe could be connected across.
Attach the probe's BNC to the test jig BNC.
Attach the X100 to the 1kV source, without any meter or 'scope attached & see what happens!
If it goes zap! all you have damaged is the probe & a couple of resistors.
If it seems OK,measure across the tap on the voltage divider & see what voltage you see.
You should be able to tell if the thing really is 100X,& not 89X, or 112X or something.
VK6ZGO