Hi guys.
I bought a pc based oscilloscope ISDS205A and now I study to use it.
I have a problem with a small standby pulse transformer, which of the primary coil should have < 300V.
In the user manual is said:
2, Oscilloscope with Probe: X1 CAN MEASURE -5V TO + 5V VOLTAGE, X10 CAN MEASURE -50V to + 50V.
3, The Measurement of the Electric Supply 220V / 110V IS DIFFERENT FROM THE NORMAL WAVEFORM MEASURMENT AND NEEDS TO BE RE-MEASURED BY AN ISOLATED TRANSFORMER.
Does that mean if i buy probe x100 I will be able to measure up to 500V ?
Sorry for the lame question,
I am learning now.
Cheers!
I bought a pc based oscilloscope ISDS205A and now I study to use it.
I have a problem with a small standby pulse transformer, which of the primary coil should have < 300V.
In the user manual is said:
2, Oscilloscope with Probe: X1 CAN MEASURE -5V TO + 5V VOLTAGE, X10 CAN MEASURE -50V to + 50V.
3, The Measurement of the Electric Supply 220V / 110V IS DIFFERENT FROM THE NORMAL WAVEFORM MEASURMENT AND NEEDS TO BE RE-MEASURED BY AN ISOLATED TRANSFORMER.
Does that mean if i buy probe x100 I will be able to measure up to 500V ?
Sorry for the lame question,
I am learning now.
Cheers!
Yes, 500V peak voltage, but make sure the probe and scope have enough bandwidth for your measurement.
A 100MHz probe should be enough for your scope.
Do not use this kind of probe for power line measurement. That requires a high voltage differential voltage probe,
not a single-ended voltage probe.
A 100MHz probe should be enough for your scope.
Do not use this kind of probe for power line measurement. That requires a high voltage differential voltage probe,
not a single-ended voltage probe.
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Yes, if you can find such a probe and if the probe itself is rated for 500 V, but there are some caveats:
-When you switch the scope to AC coupled, it will probably not survive 500 V DC, no matter what probe you use. The thing is that a resistor in the probe forms a voltage divider with the scope's input resistance. Switch it to AC coupled and all DC voltage will drop across the AC coupling capacitor inside the scope.
-Never connect the probe's ground lead to something carrying a high voltage with respect to earth, else you may electrocute yourself when you touch the scope or the computer. This is probably what remark 3 is hinting at.
-When you switch the scope to AC coupled, it will probably not survive 500 V DC, no matter what probe you use. The thing is that a resistor in the probe forms a voltage divider with the scope's input resistance. Switch it to AC coupled and all DC voltage will drop across the AC coupling capacitor inside the scope.
-Never connect the probe's ground lead to something carrying a high voltage with respect to earth, else you may electrocute yourself when you touch the scope or the computer. This is probably what remark 3 is hinting at.
I suspect the scope capacitor will probably only be 63-250 volts.
A x1 probe is poor on bandwidth but x10 and x100 are much better due to capacitor across dropping resistor in scope probe for compensation.
A x1 probe is poor on bandwidth but x10 and x100 are much better due to capacitor across dropping resistor in scope probe for compensation.
Good would be this kind of probe PS5202, but it is costly
https://download.tek.com/datasheet/TMDP-P5200-Datasheet-EN-US-51W1119514.pdf
With two 100:1 probes you could measure differentially if you do not use the AC mode. the gnd can be on safety gnd
But 8 bit of resolution won't show much on top of the DC.
https://download.tek.com/datasheet/TMDP-P5200-Datasheet-EN-US-51W1119514.pdf
With two 100:1 probes you could measure differentially if you do not use the AC mode. the gnd can be on safety gnd
But 8 bit of resolution won't show much on top of the DC.
EEVblog #932 - How Does A HV Differential Probe Work? - YouTube
Dave Jones also used to sell one of these OEM probes that many brands rebadge, but it has been out of stock for months now. Don't know if it is ever coming back either.
Dave Jones also used to sell one of these OEM probes that many brands rebadge, but it has been out of stock for months now. Don't know if it is ever coming back either.