For the test environment when performing an electrostatic discharge test according to ISO10605, the ground plane (03-00007A) is a set of three sheets. Is it acceptable to use only one sheet?

For the test environment when performing an electrostatic discharge test according to ISO10605, the ground plane (03-00007A) is a set of three sheets. Is it acceptable to use only one sheet?

ISO10605 does not specify the size of the ground plane.
* IEC61000-4-2 states “50 cm or more on each side beyond the horizontal coupling plane.”

Therefore, even an environment using only one ground plane sheet is acceptable under the ISO standard.