SCS 724 Workstation Dual-Wire Monitor
The SCS 724 Workstation Monitor continuously monitors the path-to-ground integrity of two operators and one conductive or dissipative work surface. It has been designed and tested for use with SCS Dual-Wire 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 is designed to monitor the operation of the wrist strap grounding systems of two operators. To accomplish this, it uses a DC current source to measure a loop electrical resistance. The system uses a special wristband and wrist cord that contain two independent elements. The 724 Workstation Monitor employs two selectable test voltages (9 and 16 volts) and resistance limits (10 Megohms and 35 Megohms). It also monitors the grounding of one worksurface mat. The Workstation Monitor contains a current-limiting resistor. Resistance is monitored as the test voltage passes through one side of the wristband, through the skin of the wearer under the band, through the second side of the wristband, through the second conductor of the wrist cord that contains a current-limiting resistor, and finally back to the monitor.
The SCS 724 Workstation Monitor meets the requirements of ANSI/ESD S20.20 and recommendations of ESD Handbook ESD TR20.20 which include:
“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”.
SCS 724MO Workstation Monitor Features and Attributes:
- Single workstation continuous monitor – Meets ANSI/ESD S20.20 in accordance with ESD TR1.0-01-01
- Continuously monitors 2 operator dual-wire wrist straps and 1 worksurface mat – Visible and audible alarms indicate improper grounding of the operator and work surface
- Adjustable operator test voltage and upper limit – Test voltage can be set to 9 or 16 volts; test limit can be set to 10 or 35 megohms
- Adjustable audible alarm - Buzzer volume may be disabled or set to loud or soft
- Simple installation and setup – Mounting hardware and wire management clips are included
- No power adapter
- Calibration verification tester sold separately (770065) - Use to perform periodic calibration testing of the 724 Workstation Monitor
- UL Safety certified - Complies UL Category Code Number NYOK
- NIST calibrated with certificate included
- Made in the USA