Regulate and verify an AC current to test a current transducer sensor
Your basic plan sounds reasonable, But...

I would not recommend a dimmer switch to regulate the current. They chop up the AC waveform, which will stress the RMS  calculation part of the sensor, and probably give you inaccurate readings. Rather find a selection of incandescent / halogen light bulbs and connect them one by one.

Note that you can increase the current seen by the sensor, by passing the wire through it a few times.  Perhaps don't wind tight coils around it, but if you keep it fairly loose, each time the current passes through the hole it will be counted again. So you can fairly easily and accurately double or quadruple the current from one lightbulb, to try out the full range of the sensor.