TECHNICAL BULLETIN TB-2004 Touch Tester - Operation,Installation Made in the and Calibration Instructions United States of America Pass Range: 750 kilohms to 10 megohms Figure 3. Testing a wrist strap Figure 1. Model 19350 Wrist Strap Tester / Common Point Ground Installation Description The Touch Tester is easily attached at the workstation. A snap stud Per ANSI/ESD S20.20, test equipme nt is required to enact at ground reference is provided on the back of the unit, allowing it to Compliance Verification Plan Requirement. Test equipment shall be snapp ed directly to a mat. In this configuration, the unit provides be selected to make measurements of appropriate properties of the a common-point ground for both the mat and the wrist strap, and is technical requirements that are incorporated into the ESD program easily accessible for frequent testing. A piece of adhesive backed plan. hook and loop fastener is provided for the user as an alternative mounting method preventing the tester from rotating. The Touch Tester is an on demand wrist strap tester that also functions as a common-point ground for two wrist straps and a mat. When the wearer of a wrist strap touches the metallic surface of the Touch Tester, a path for current flow is completed from the wearers skin, through the wrist strap, to the metallic surface to ground. This action will cause the green test good LED to light (and the optional audible signal to sound) as long as the resistance of the circuit path is between 750k ohms and 10 megohms. 19350 WRIST STRAP GROUND (09740) Figure 4. Installation of Touch Tester The hook-and-loop type fastener also allows fast mounting to smooth surfaces. This method is convenient for mounting the tester on a workstation leg or on an upright support for shelving or lights. (Note - the snap does not have to be connected for proper grounding). Equipment Rating: Figure 2. 19350 Testing Circuit AC Adapter rated 120 Vac, 60 Hz, 6 W. Ground Touch Tester rated 6.5 Vdc, 50 mA. The wrist strap being tested may be plugged directly to the tester or any convenient common ground point. The wrist strap will test Environmental Conditions properly as long as both the Touch Tester and the wrist strap are Suitable for indo or use only at altitudes not exceeding 6500 ft. connected to a common ground. Therefore, any number of wrist strap (2Km) wearers may use the Touch Tester if they can conveniently reach Temperature range of 41F (5C) to 104F (40C) it. Desco item 09740 provides two banana jacks for grounding wrist Maximum relative humidity of 80% up to 88F (31C) decreasing straps. linearly to 50% 104F (40C) Pollution degree 2 per IEC 664 When the Touch Tester and a 09740 are tied to a common ground Installation Category II (utility ground) wrist straps plugged into the 09740 can also be tested. CAUTION: If this equipment is used in a manner not specified by the manufacturer, the protection provide by the equipment may be impaired. 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 2015 DESCO INDUSTRIES INC. TB-2004 August 2015 Page 1 of 3 Employee OwnedAudible Option CONNECTOR ATTACHMENT If desired , the Touch Tester will augment the visual test good FOR P-6911 ALTERNATIVES indicator with an audible signal. In the on position, the tester will AC ADAPTER beep when the green test good LED is on, thereby allowing the operator to frequently test the wristband and cord without having to look at the tester. HOOK & LOOP To enable /disable the signal, a slide switch is accessible through the FASTENER hole on the back of the unit. First, unplug the power supply. Actuate the switch with a small probing tool, being careful to avoid internal damage. SNAPS Figure 5. Attachment alternatives Figure 8. Accessing the audible signal Calibration We recommend annual calibration of our testers. The model 19350 is calibrated to NIST traceable standards. Calibration may be performed to ensure that the tester is operating within limits. DC Output Desco offers a calibration unit that is specifically designed to simplify IEC Input the calibration procedure. This unit is sold as item 07010. The 07010 comes calibrated to NIST traceable standards. Ask for Technical Bulletin TB-2039 for detailed procedure to calibrate the 19350. Figure 6. AC Adapter, 220 Volt Operation Specifications When the Touch Testers power supply is plugged into a grounded Operating Voltage 6 VDC outlet the red LED will be on, indicating that the unit is powered. The utility ground is internally connected to the .395 (10mm) snap stud Operating Temperature 32F to 104F (0 to 40C) on the back of the unit and to the 2 banana jacks at the bottom edge of the tester. Wrist Strap Test Limit: 750 kilohms to 10 megohms Test Accuracy: 20% Test Voltage 4 VDC GROUND POINTS Dimensions 2.9 x 2.1 x 0.8 Weight 0.1 lbs 10mm Snap Stud Banana Jacks Limited Warranty, Warranty Exclusions, Limit of Liability and RMA Request Instructions Figure 7. Ground points See Desco Terms and Conditions A wrist strap is plugged into one of the banana jacks or into any common grounding point. When the wearer of a wrist strap touches the metallic test surface, the green test good LED will light if the operator-to-ground resistance is between 750k ohms and 10 megohms. Proper Ground The integrity of the utility ground must be tested before the Touch Tester is plugged in. The Touch Tester utilizes the green wire ground as the static ground. Each outlet must be tested for proper grounding prior to use. Outlets can become ungrounded over time due to corrosion, wear, or vibration. Desco recommends the 98132 AC Outlet Analyzer & Wrist Strap Tester when testing electrical outlets for proper grounding and wiring. See Technical Bulletin TB-2099 for more information. 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 2015 DESCO INDUSTRIES INC. TB-2004 Page 2 of 2 Employee Owned