TB-9055
Page 1 of 6
© 2016 DESCO INDUSTRIES, INC.
Employee Owned
CTC337 Wrist Strap and Ground Monitor
Installation, Operation and Maintenance
April 2016
USER GUIDE TB-9055
Description
The SCS CTC337 Wrist Strap and Ground Monitor can
be used in work areas or other locations to monitor
the ground impedance of metal ground connection in
process tools including but not limited to semiconductor,
disk drive, flat panel and electronic equipment
manufacturing environments. Ground impedance
monitoring can be used for one metal ground point, such
as within a tool. The Wrist Strap and Ground Monitor
can be used to monitor the impedance-to-ground and
voltage level on two persons wearing dual-wire wrist
straps. The unit incorporates green and red LEDs and
an audible alarm.
Ground Impedance Monitor
– Continuously monitors
for ground impedance on one channel that is connected
to one process tool.
Operator Connection
– The Wrist Strap and Ground
Monitor provides continuous monitoring of operator
connection to the monitor via loop resistance check of
operator’s physical presence using a dual wire wrist
strap.
Voltage on Person Wrist Strap Monitor
– The Wrist
Strap and Ground Monitor has one additional feature
that allows continuous monitoring for excessive voltage
on each operator.
The Wrist Strap and Ground Monitor is available in one
model:
Item
Description
Wrist Strap and Ground Monitor, with
World Wide Power Adapter
SCS offers the following accessories for the Wrist Strap
and Ground Monitor:
Item
Description
Replacement Jack PCB, CTC337 Wrist
Strap and Ground Monitor
Workstation Monitor Checker
Power Adapter, 100-240VAC Input, 12VDC
1.5A Output, All Plugs
Packaging
1 Wrist Strap and Ground Monitor
1 Monitor Ground Cord (Green and Yellow)
1 Power Adapter, 12VDC, with interchangeable plugs
(North America, UK/Asia, Europe)
1 Certificate of Calibration
Installation
Wire Attachment
Attach 18 AWG wires to the unit as described below.
Strip back the vinyl insulation at each end of the wires
to approximately 1/3 inch (8 mm). Twist the stranded
wire on each end before inserting the wire into each
connector location. In order to attach the wire, insert
a small blade screwdriver into the orange slot above.
Gently push inward and insert the stripped wire fully
into the hole in the green connector. Hold the wire
fully in and release the screwdriver to allow the wire
to catch. Attach the green monitor ground cord to the
ground connector on back of unit. Attach the impedance
monitor wire to the “GND1” connector on the back of the
unit.
Made in the
United States of America
Figure 1. SCS CTC337 Wrist Strap and Ground Monitor
Figure 2. Rear view of Wrist Strap and Ground Monitor
www.
.com
1.800.561.8187