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USER GUIDE TB-9013
724 Workstation Monitor
Installation, Operation and Maintenance
Figure 1. SCS 724 Workstation Monitor
Description
The SCS 724 Workstation Monitor continuously
monitors the path-to-ground integrity of two operators
and one conductive or dissipative worksurface. It has
been designed and tested for use with
Wrist Straps
and Worksurface Mats. If the equipment is
used in a manner not specified in these instructions, the
protection provided by the equipment may be impaired.
Use in any other application has not been evaluated by
SCS and may lead to an unsafe condition.
The SCS 724 Workstation Monitor meets
the requirements of ANSI/ESD S20.20 and
recommendations of ESD Handbook ESD TR20.20
which includes "if the products that are being produced
are of such value that knowledge of a continuous,
reliable ground is needed, and then continuous
monitoring should be considered or even required".
The 724 Workstation Monitor is available in three
models:
Item
Description
724
724 Workstation Monitor, North America
Power Adapter
724MO
724 Workstation Monitor, No Power
Adapter
724K-WM11
724 Workstation Monitor Kit, with Wrist
Strap and Worksurface Mat
TB-9013 Page 1 of 8
August 2017
SCS Dual-Wire
SCS - 926 JR Industrial Drive, Sanford, NC 27332
East: (919) 718-0000 | West: (909) 627-9634 • Website:
The following accessories are available for the 724
Workstation Monitor:
Item
Description
724VK2
Verification Tester
724P
Power Adapter, 120VAC Input, 25VDC
Output, North America Plug
724-PSEU
Power Adapter, 100-240VAC Input,
24VDC Output, UK & Euro Plugs
732
Dual Operator Remote
733
Operator Remote
770037
Terminal Block, Pack of 5
3057
Standby Jack
2389
Mat Interconnect Cord, 10'
2380D
Mat Monitor Cord, with Diode, 6'
Packaging
724 Workstation Monitor, North America
1 724 Workstation Monitor
1 732 Dual Operator Remote
1 Dual Operator Remote Cable
1 Power Adapter, North America
1 Monitor Ground Cord
1 2380D Mat Monitor Cord
1 Two-Wire Terminal Block
2 Long Mounting Screws
2 Short Mounting Screws
2 Cable Tie Mounts
2 Zip Ties
1 Certificate of Calibration
Figure 2. SCS 724 Workstation Monitor packaging
contents
StaticControl.com
© 2017 DESCO INDUSTRIES, INC.
Employee Owned
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Table of Contents
Related Manuals for SCS 2389
Summarization of Contents
Description
General Description
Monitors path-to-ground integrity for two operators and one worksurface. Designed for specific SCS accessories.
Packaging
Packaging Contents
Lists the items included with the 724 Workstation Monitor, North America model.
Theory of Operation
System Operation
Monitors wrist strap grounding systems using DC current to measure loop resistance via special wristbands and cords.
LED Indicators Explained
Details the function of green (pass), red (fail high), and yellow (fail low) LEDs for operator monitoring.
Features and Components
Component Overview
Identifies physical features like operator remote jacks, pass/fail LEDs, and switch controls on the monitor.
Operator Test Settings
Explains the operator test limit and test voltage selection switches for customized monitoring parameters.
OPERATOR MONITORING
Wrist Strap Monitoring
Explains how wrist strap loop resistance is measured and indicated by OK, High (H), and Low (L) LEDs.
Fault Conditions Explained
Details specific fault conditions: high resistance (red LED), low resistance (yellow LED), and worksurface faults.
OPERATOR TEST VOLTAGE
Voltage Levels Under Test
Illustrates voltage levels applied to operators under various resistance conditions and test voltage settings.
AUDIBLE ALARM SETTINGS
Alarm Tone Configuration
Describes how alarm tones differ for each operator and how DIP switches control alarm volume and activation.
WORKSURFACE MONITORING
Worksurface Grounding Check
Monitors worksurface grounding via loop resistance, activating a red LED and alarm if resistance exceeds 3.7 Megohms.
Installation
Connecting Components
Instructions for connecting the monitor, operator remote, terminal block, and power adapter.
Grounding Methods
Details how to ground the 724 Workstation Monitor using either its power adapter or the green monitor ground cord.
Connecting to Worksurface Mat
Steps to route the mat monitor cord and connect it to a grounded worksurface mat via a terminal block.
Operation
Using the Monitor
Step-by-step guide for fitting wristbands, connecting cords, and verifying operator grounding.
Fault Condition Indicators
Explains the meaning of red (high resistance) and yellow (low resistance) wrist strap LEDs and the red worksurface LED.
SCS 3057 Standby Jack
Details the use of an optional Standby Jack for disconnecting cords from remotes when leaving a workstation.
Calibration
Recalibration Frequency
Recommends annual calibration based on critical nature of ESD items and risk of failure.
Verification Tester Use
Explains using the SCS 724VK2 Verification Tester for periodic testing (6-12 months) on the shop floor.
SCS 733 OPERATOR REMOTE
Remote Unit Functionality
Describes the SCS 733 Operator Remote's purpose in separating wrist strap jacks up to 10 feet from the 732 Dual Operator Remote.
Specifications
Physical Dimensions
Provides dimensions for the Workstation Monitor and Operator Remote, and output plug specifications.
Environmental Operating Conditions
Details temperature, humidity, and indoor use requirements for the equipment.
Safety Information
Warning: Fire and Explosion Risk
Advises against using the monitor in explosive environments due to it not being intrinsically safe.
Warning: Medical Device Risk
Warns persons with heart pacemaker devices against using this monitor.
Warning: Hazardous Voltage and Fire
Emphasizes using specified power supply, proper placement, and avoiding modification or outdoor use.
Caution: Environmental Contamination
Instructs users to dispose of the monitor according to applicable local and government regulations.
Notice: ESD Damage Prevention
Recommends periodic checks, verification tests, and ensuring the tester is properly grounded.
Environmental Conditions
Operating Environment
Specifies conditions for safe operation: indoor use, altitude, voltage fluctuations, and pollution degree.
Temperature and Humidity Limits
Defines maximum temperature (110°F/43°C) and relative humidity (80% down to 50%) ranges.
FCC Compliance
RF Energy and Interference
States compliance with FCC Part 15 for Class A digital device, potential for radio frequency interference.
Modification Restrictions
Prohibits unauthorized modifications, which may void operating authority.
ICES Statement
Canadian Compliance
Confirms compliance of this Class A digital apparatus with Canadian ICES-003.
WEEE Statement
EU Waste Disposal
Information for EU members regarding WEEE directive, requiring proper disposal via return/collection systems.
CE and cULus Statements
European Conformity
Confirms the monitor meets CE (European Conformity) requirements.
UL Safety Requirements
Confirms the monitor meets UL Safety Requirements.
Warranty Information
Limited Warranty Details
Provides information on limited warranty, exclusions, liability, and RMA request instructions via a web link.
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