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New MicSig/EEVblog DP10007 HV Differential Probe

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beanflying:
Rule of adapters you will never have enough  :palm:

The 4mm posts on my Calibrator are to short to take the points on the multimeter type probe/jacks (suits most others I have with a quick check). I could have made a MF set but went with spade lugs instead for a variation in the box.

mrprecision:
I have done some Measurements with the DP10013 and DP10007 for comparison:


* Channel 1: Generator
* Channel 2: DP10013
* Channel 2: DP10007
Frequency Response Divider x10 x50

Comment: Usefull up to 10MHz




Frequency Response Divider x100 x500

Comment: Usefull up to 10MHz




Noise Divider x10 x50 (Standard Deviation = RMS Noise)

Comment: 33mV (DP10013) vs 13mV (DP10007)




Noise Divider x100 x500 (Standard Deviation = RMS Noise)

Comment: 107mV (DP10013) vs 26mV (DP10007)




Common Mode Rejection  x10 x50




Common Mode Rejection  x100 x500




Step Response x10 x50




Step Response x100 x500



BreakingOhmsLaw:
I have a DP10007 as well.

CMRR measured and (vs spec value) on 10x

50Hz   -70dB  (-80)
20kHz -55dB  (-60)
1MHz  -52dB (-50)
10MHz -33,2dB (-40)

No information how Micsig measures the CMRR though.
Can we agree on a common setup? Input leads twisted x-times, input signal etc.?

mrprecision:
Here you can see the setup for my common mode measurement:





A question is how save is the device. What happen if the BNC connector is not grounded via the scope (as in the manual recommended). The impedance between the measuring cable and the BNC shield is not high enough to pass the electronic device test (devices of class II).

mrprecision:
I did some further measurements regarding safety. For the measurement I followed up the IEC 61010-1 (Safety requirements for electrical equipment for measurement, control, and laboratory use).

In part 6.3 "limit values for accessible parts" "level in normal condition", there is a current level of 0.5mArms for measuring circuit of figure A2 (2k ohm load) for sinussoidal a.c. with frequencies up to 100Hz.

I put my maximum measuring voltage of arround 250Vrms @ 50Hz at the inputs. Then I measured the current flow from the BNC shield to one of the input pins. The measuring result was 0.143mArms. This value is lower than 0.5mArms and therefore not be hazardous for llife. So the probe should be save.

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