TB-3066
Page 3 of 8
© 2017 DESCO INDUSTRIES, INC.
Employee Owned
DESCO WEST
- 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178
DESCO EAST
- One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Website:
Desco.com
Installation
TESTER CONFIGURATION
The resistance limits for footwear and wrist strap tests
are controlled by the DIP switches located on the left
side of the Combo Tester X3. Use the following tables
for the DIP switch settings and their corresponding test
values.
Footwear Resistance
DIP switches 1 and 2 control the HIGH test limit.
Switch 1 Switch 2 HIGH Limit Resistance
ON
ON
10 Megohms (1 x 10
7
)
OFF
OFF
35 Megohms (3.5 x 10
7
)
ON
OFF
100 Megohms (1 x 10
8
)
OFF
ON
1 Gigohm (1 x 10
9
)
DIP switches 3 and 4 control the LOW test limit.
Switch 3 Switch 4 LOW Limit Resistance
OFF
OFF
footwear test disabled
ON
OFF
100 Kilohms (1 x 10
5
)
OFF
ON
750 Kilohms (7.5 x 10
5
)
default setting
NOTE: At 1 Gigohm high limit resistance, a dirty foot
plate could result in a false pass. Be sure to keep the
foot plate clean particularly when using this setting. This
setting is not suitable for relative humidity greater than
50%.
Wrist Strap Resistance
DIP switches 5 and 6 control the HIGH test limit.
Switch 5 Switch 6 HIGH Limit Resistance
OFF
OFF
wrist strap test disabled
ON
ON
10 Megohms (1 x 10
7
)
ON
OFF
35 Megohms (3.5 x 10
7
)
default setting
DIP switch 5 must be ON (default setting) for the wrist
strap test to be active. The wrist strap test will be
disabled if DIP switch 5 is set to OFF.
The LOW limit for the wrist strap test is set to 750
kilohms and cannot be modified by the user.
5. Insert the ground cord’s banana plug into the
ground jack located at the bottom of the tester.
Connect ground cord’s ring terminal to equipment
ground. This connection will remove any static
charge from the user before the test.
NOTE: Failure
to correctly ground the Combo Tester X3 may result
in damage not covered under warranty.
6. Power the Combo Tester X3 using the included
power supply.
Figure 3. Routing the foot plate cord through the foot
plate’s guide
Bottom Side
INSTALLING THE COMBO TESTER X3
1. Mount the tester at the desired location using the
four mounting holes located in the corners of the
yellow mounting plate.
2. Set the Dual Foot Plate below the tester.
3. Insert one end of the foot plate cord into the stereo
jack located at the bottom of the tester. Insert the
opposite end of the cord into the stereo jack located
at the back of the foot plate.
4. Use the guide located on the bottom of the foot
plate to route the cord out of the side. This will
prevent the foot plate cord from being accidentally
tripped and unplugged.
