6
Testing Procedure
Wrist Band/Cord Test
7.
Put the wrist band on with the ground cord attached and insert the
ground cord banana plug into the yellow wrist strap plug-in jack.
8.
Depress the metal contact plate and hold.
9.
One of the LED indicators will illuminate. An illuminated green LED
indicates that the wrist strap assembly performs within the resistance
range of 750 K
Ω
to
10 M
Ω
. If a red LED is illuminated, the resistance
of the wrist strap assembly may be outside the range of 750 K
Ω
to
10 M
Ω
. To check the resistance of the ground cord, leave the banana
plug end attached to the tester. Unsnap the cord from the wrist band.
Place the metal side of the ground cord snap end against the metal
contact plate. Depress the plate and check to see which LED
illuminates. If the red LED illuminates, the ground cord is outside
of the resistance range. If the green LED illuminates, the ground cord
is “OK” but the wrist band may need to be replaced.
NOTE: In some cases, a high contact resistance between the person’s skin and
the wrist band will cause the tester to indicate a red LED (greater than
10 M
Ω
). This higher resistance may be caused by dry skin or hair
on the wearer's wrist. A loose fitting wrist band can also cause
intermittency or high resistance. If these conditions do not exist, a
new wrist band should be obtained and tested on the person.
