This is already clarified in the rules based on 2.2 / 2.3. Detective warnings / KOS reasons can be given based on anything within reason, as long as the appropriate warnings are given. Getting a user to stand still for use of the portable tester would be classed as being "within reason".

This is already clarified in the rules based on 2.2 / 2.3. Detective warnings / KOS reasons can be given based on anything within reason, as long as the appropriate warnings are given. Getting a user to stand still for use of the portable tester would be classed as being "within reason".