[Test Equipment] I am using the LSS-15AX-A1 and LSS-F03-A1 lightning surge testers. When applying to the phase angle of the AC line, the 15AX manual describes phase angle correction, but there is no description for the F03. Is correction not necessary for

[Test Equipment] I am using the LSS-15AX-A1 and LSS-F03-A1 lightning surge testers. When applying to the phase angle of the AC line, the 15AX manual describes phase angle correction, but there is no description for the F03. Is correction not necessary for

The F03 automatically corrects based on the application phase, so there is no need to correct and input the phase angle.

Supplement
LSS-15AX: Manual correction
LSS-F02/F03: Automatic correction
LSS-F03A: Since around October 2019, automatic correction ON/OFF can be selected via utility

LSS-6330: Automatic correction ON/OFF can be selected via utility
LSS-6330A: Automatic correction ON/OFF can be selected via utility