Hi All,
When dealing with analogue voltages how does everyone decide if the signal they want to measure is floating or ground referenced?
Is a quick multimeter test good enough to determine floating or ground referenced?
e.g power off, measure between common and earth ground. If so what typical values are we looking for, a dead short?, high resistance?
It might sound easy if your talking about batteries etc but what about power supplies?
Even if you know your PSU is floating or grounded, the device it is powering can have its signal output isolated from its power connections.
So when trying to make measurements of a sensor do we only care about the actual sensors relationship to ground or the whole system>?
Thanks
When dealing with analogue voltages how does everyone decide if the signal they want to measure is floating or ground referenced?
Is a quick multimeter test good enough to determine floating or ground referenced?
e.g power off, measure between common and earth ground. If so what typical values are we looking for, a dead short?, high resistance?
It might sound easy if your talking about batteries etc but what about power supplies?
Even if you know your PSU is floating or grounded, the device it is powering can have its signal output isolated from its power connections.
So when trying to make measurements of a sensor do we only care about the actual sensors relationship to ground or the whole system>?
Thanks