TECHNICAL BULLETIN TB-3083 Dual-Wire Dual Operator Monitor Made in the Installation, Operation and Maintenance United States of America ANSI/ESD S20.20 section 7.3 states Compliance verification records shall be established and maintained to provide evidence of conformity to the technical requirements. Per ANSI/ESD S1.1 Annex A.3 Daily (wrist strap system) testing may be omitted if constant monitoring used. Per ESD Handbook ESD TR 20.20 section 5.3.2.4.4 Typical Test programs recommend that wrist straps that are used daily should be tested daily. However, if the products that are being produced are of such value that knowledge of a continuous, reliable ground is needed, and then continuous Figure 1. Desco 19662 Dual-Wire Dual Operator Monitor monitoring should be considered or even required. The Dual-Wire Dual Operator Monitor and its Description accessories are available in the following item numbers: The Desco 19662 Dual-Wire Dual Operator Monitor monitors two operators and two ESD worksurfaces Item Description eliminating the need for periodic testing and 19662 Dual-Wire Dual Operator Monitor record keeping of wrist straps. The Dual-Wire Dual Operator Monitor uses low-voltage steady state DC 19663 Mounting Brackets continuous-loop technology to continuously monitor 50524 Limit Comparator (versus pulsed or intermittent) dual-wire wrist strap functionality. Independent audio and visual alarm 50525 Replacement Operator Remote Kit, Black conditions identify the status of the worksurfaces and 50526 Replacement Operator Remote Kit, White operators. Two operator remotes with 10 foot cables are 19262 Replacement Power Adapter, 12 VDC included for use at adjacent workstations. Each monitor is calibrated with accepted procedures and standards traceable to the National Institute of Standards and Packaging Technology (NIST) and includes a NIST certificate. 19662 Dual-Wire Dual Operator Monitor Dual Wire Monitor Technology 1 Dual-Wire Dual Operator Monitor 1 Power Adapter, 12VDC, with interchangeable plugs Desco dual wire dual operator monitors uses a loop (North America, UK/Asia, Europe) electrical resistance technology. A +5 or +8 volt test 2 Operator Remotes with Attached Cables signal1 is generated by the monitor and placed on one (1 Black, 1 White) conductor of the dual wire wrist strap. The test voltage 2 White Mat Monitor Cords is bridged to the opposite conductor through the skin of 1 Monitor Ground Cord the wearer of the wristband and returned to the monitor. 1 Certificate of Calibration Resistance is monitored with a stable continuous signal through one conductor, across the skin of the operator, 19663 Mounting Brackets and returning to the monitor through the opposite 2 Mounting Brackets conductor. Desco dual wire dual operator monitors 4 Pan Head Screws, 8-32 x 1/8 determine that the operators path-to-ground is between the 10 or 35 megohms2 upper limit (adjustable) and 1 megohm1 lower limit. 1. See Operator Test Voltage section below for pass/ fail specs. User should determine if these voltages can damage the device being handled. Other lower voltage monitoring systems may need to be considered. 2. See Operator Test Range section below for pass/fail specs. 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 2020 DESCO INDUSTRIES INC TB-3083 Page 1 of 5 December 2020 Employee OwnedE. Power Jack: Connect to the included 12VDC power Features and Components adapter. A B F. Operator 2 Remote Jack: Connect to the black operator remote cable. G. Operator 1 Remote Jack: Connect to the white operator remote cable. H. Monitored Mat 1 Terminal: Monitors a worksurface mat for proper dissipative resistance and static charges. Connect the white mat monitor cord here. I. Ground Terminal: Common ground point for the monitor. Connect to the green and yellow monitor C D FRONT VIEW ground cord. J. Monitored Mat 2 Terminal: Monitors a worksurface mat for proper dissipative resistance and static charges. Connect the black monitor cord here. K. Data Output: For manufacturer use only. L. Alarm Audible Adjustment: Turn the trimpot counter-clockwise to increase the audible alarm volume and clockwise to decrease it. M. Mounting Holes: 8-32 PEM nuts are located on the E F G H I J K L left and right sides of the monitor for pairing with the BACK VIEW Desco 19663 Mounting Brackets. N. Operator Setting Switches: Toggles the monitors settings for operator test voltage and high test limit. Switches 1 and 2 control the operator test voltage. Switch 1 Switch 2 Operator Test Voltage RIGHT LEFT 5V LEFT RIGHT 8V M N Switch 3 controls the operator HIGH test limit. LEFT-SIDE VIEW Figure 2. Dual-Wire Dual Operator Monitor features and Switch 3 HIGH Limit Resistance components RIGHT 10 megohms (1 x 10 ohms) A. Operator 1 Status LEDs: When the green LED is LEFT 35 megohms (3.5 x 10 ohms) illuminated, operator 1 is properly grounded. When the LED is illuminated red or yellow and the alarm sounds, default setting operator 1 is not properly grounded. B. Worksurface 1 Status LEDs: When the green LED is illuminated, worksurface 1 is properly grounded. When the red LED is illuminated and the alarm sounds, worksurface 1 is not properly grounded. C. Operator 2 Status LEDs: When the green LED is illuminated, operator 2 is properly grounded. When the LED is illuminated red or yellow and the alarm sounds, operator 2 is not properly grounded. D. Worksurface 2 Status LEDs: When the green LED is illuminated, worksurface 2 is properly grounded. When the LED is illuminated red and the alarm sounds, worksurface 2 is not properly grounded. 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 2020 DESCO INDUSTRIES INC TB-3083 Page 2 of 5 December 2020 Employee Owned