Wrist strap is the first line of defence
against electrostatic charges builds
up on the human body. It is designed
to carry away this charge as soon as it
is generated. At the same time wrist
strap must remain electrically safe for
the user. Thus, it is important to test
every wrist strap regularly.
In order to protect the sensitive
electronic components the maximum
wrist strap resistance should not be
more than 10 Meg ohms on the other
end, the resistance should not be less
than 0.75 Meg ohms as protection to
the wearer from dangerous level of the
voltage and current flow.
The wrist strap tester checks these
parameters under actual operating
conditions with the strap on the wrist.
It clearly indicates whether or not the resistance of the wrist strap
system including the wearer is at least 0.75 Meg ohms and not more
than 10 Meg ohms respectively.