Hi Everyone, hoping you can help me solve a strange issue I’m having with my new Siglent SDM3055.
I have my computer plugged into a power bar, and from that computer is an audio interface that sends audio to a tube power amp running two speakers on my desk. When testing devices, I run them through an isolation transformer. The isolation transformer is plugged straight into the outlet and doesn’t go through the power bar. My multimeter is plugged into the power bar along with the audio amp. I use the audio amp to listen to music while testing devices. If I measure the high voltage (around 450 volts) from for example a tube guitar amp, it causes my audio interface to lose connection to my pc. If I make a great connection with the probe the first time, it only makes the audio interface be interrupted for a split second. If I make a bad connection (very lightly touching the probe, causing it to arc slightly) this makes the audio interface lose connection entirely until I stop. I can’t think of what would cause this, as the device under test is isolated from every other device.
Do any of you have any ideas? Or am I doing something wrong?
Thanks