I have ESD charge vulnerable PCBs and I am going to use them to make some tests outdoor. I am thinking of a way to protect them while doing the test since they are going to be touched by hand and maybe laid on floor or conducting surfaces. Because that the test is outdoor there is no way for me to use ESD wrist strap and be connected to ground.
For the time being I am not able to afford buying plastic boxes for protection. I have got an idea to make a box from cardboard and put a flipped aluminum foil inside of it (like the anti-static bags). I do not know how much effective the cardboard box is but it should work to some extent.
What are the disadvantages of this way? Are there any other ideas to protect the PCBs?
The PCBs are for wireless communication and each one has a 6.5 cm whip antenna. Each PCB is powered by a 12V battery.