Dell Latitude 5424 Rugged Service Manual page 69

Table 27. Wrist Straps
Wrist Strap and Bonding Wire Wireless ESD Strap (Unacceptable)
ESD Wrist Strap Tester
The wires inside of an ESD strap are prone to damage over time. When using an unmonitored kit, it is best practice to regularly
test the strap prior to each service call, and at a minimum, test once per week. A wrist strap tester is the best method for doing
this test. If you do not have your own wrist strap tester, check with your regional office to find out if they have one. To perform
the test, plug the wrist-strap's bonding-wire into the tester while it is strapped to your wrist and push the button to test. A
green LED is lit if the test is successful; a red LED is lit and an alarm sounds if the test fails.
Figure 13. Wrist Strap Tester
Insulator Elements
It is critical to keep ESD sensitive devices, such as plastic heat sink casings, away from internal parts that are insulators and
often highly charged.
Removing and installing components 69