Hi dpenev,
Thanks for your feedback, and the hold mode is working with OL feature now, we have updated the firmware to v1.5.2
I saw you have removed the small circuit icons RC, RL, etc from the UI.
Is it to free some room on the display?when it displays OL, the mode is uncertain, so the mode is not displayed, and when ST42 detect right components, the mode display will be there.
There is R and Rdc measurement modes. What is the difference?R is tested by AC excitation signal, Rdc is tested by DC excitation signal
OK. What is the level of the DC excitation signal? I have noticed a big difference for a resistor on a PCB
measured with mode R and Rdc.
Why hold mode is not applicable for Rdc? we are trying to add hold-on feature to the Rdc test.
SelfCal is used for the signal chain calibration
This one is not clear to me. What is signal chain calibration?
Do you suggest "short" done only before small resistors measurement?
"Open" only before small capacitor measurement?well, the signal chain can be understood as a ADC.
"short" and "open" cal is not necessary for every time small and large impedance measurement.
I suggest when you found the contact resistance and open cap is not close zero as you want,
you can try to do the "short" and "open" calibration.
Can you recommend an article or tutorial about using the RLC tweezers for in circuit measurement.
I guess there are recommended approaches of measuring resistors pull up, pull down, op-amp feedbacks, decoupling capacitors, etc. hm...there are too many different circuits and types on the PCB, we may not have enough time to analysis them.
BUT one of the on PCB test recommendations is changing the excitation voltage to 0.1Vpp is good for most case.