We usually verify current circuits by pushing current to the relays from the ct with a 6150. But I was thinking maybe there’s something easier, smaller does need a computer. Is thEre something out there that would just push .5 amps?
You could probably make your own little setup. Just use a variable current source of a few hundred amps and reduce it down with a spare CT if you have any laying around. All you need is something to meter with and you should be good.