Can AC current be measured?

AC current can be measured by the following methods. 

Using a commercially available clamp meter

Use a clamp meter with an analog output terminal and connect it to the analog input terminal of the amplifier. 
For details on the connection method, refer to “2.5 Signal Input Cable Connection Method” in the Operation Manual. 
When  the EU (scaling setting) is set, it is possible to record it as a current value.