Hello My name is Ian and I am new to the EEVBlog Forums.
I am a technician working in the field of servicing and repairing heavy industrial electrical rotating machinery such as motors and generators.
One of my new recent roles is to test voltage outputs from inverter drives such as variable frequency, variable voltage drives. The main requirement of this monitoring is to detect voltage transients, switch frequencies and most importantly rise times (delta voltage / delta time) as this can have a crucial effect on the insulation systems of motors. Motor manufactures will specify a rise time characteristic that their insulation system must conform to.
We have look at different test products on the market including specialised motor test equipment as well as DSO's used in conjunction with differential probes as we are measuring line voltages greater than 415 VAC RMS 3 phases. We are looking for switch rate frequencies in the ranges from 1Khz to 6Khz.
One of our main requirements with any test equipment is its ability to store wave forms for analysis at a later date. As we generally have a very limited time in the field, our sole focus onsite is to capture and store data with analysis to be performed offsite.
We recently invested in an 4 channel Siglent SDS 2104X DSO for the purpose of data capture and post analysis. However we were shocked to find that the DSO was unable to save or recall waveforms for later analysis. We are no stranger to Siglent DSO's as we also have a 2 channel SHS 1102 hand held DSO with that unit performing well with save and recall of waverforms. We were expecting the SDS to have the same save and recall features.
Has anyone else experienced this issue with the SDS?
We contacted our vendor of the SDS and they confirmed our issue. They have since contacted Siglent and awaiting their feedback. It could possibly be fixed with a simple firmware patch however the SDS we have is not fit for purpose and we are looking to return the scope back to our vendor.
I am currently looking for alternative 4 channel DSO's and I quite like the look of Hantek PC-USB option. Pairing this unit with a PC is desirable for me for the purpose of data capture, post analysis, onscreen measurement tools (for dv/dt) and report generation.
My question does anyone own an Hantek PC-USB DSO?
What are your thoughts about it and its software?
What is the save and recall feature like?
I downloaded and installed the software that is available online from Hantek to drive the 6000 series and it does look good. However as I do not own an Hantek DSO, I can only use the software in demo mode. I found an issue of trying to save the waveform in wms format it comes up with errors. I am not sure if the error is the result of the unit being in demo mode or my PC's virus protection blocking it as it was flagged.
Has anyone else had these issues with Hantek software when saving and recalling waveforms?
Are there any other cost effective DSO's on the market that could meet our needs?