We have 230 VAC power supply in our lab.A chemical earthing is done for this power supply. I have connected a SMPS (LRS-35-12) to it. The Output of SMPS is connected to a load of maximum 2A. I have measured the smps output voltage as 12VDC and the device (load) is working and controller is sending data also. But at the same time I have turn my multi-meter at AC voltage mode and measured the SMPS output voltage,I found it as 25VAC. (I expected it to be around 0 VAC.)
So, what could be the reason of it?