TECHNICAL BULLETIN TB-7575 Wrist Strap Tester - Operation, Installation and Calibration Instructions Made in America Pass Range 800K Ohms to 10 Megohms, 9 Volt Battery Operation plate shall be pressed to verify that Installation the wrist strap system resistance is The Wrist Strap Tester is battery within acceptable parameters. The powered. When received, open the test apparatus can be an integrated, battery compartment and install the commercially available tester. Being battery, and you will be ready to test a portable battery powered tool, your wrist straps while worn. it is perfectfor small labs or for a supervisor to spot-check workers Note: the low battery indicator and/or ensure compliance. flashes every time the unit is used. When battery fail indicator is Per EN 61340-5-1 Edition 1.0 constant, check voltage of battery 2007-08 All personnel shall be and/or replace it. grounded when handling ESDS ESD sensitive items . When Operation personnel are seated at ESD A wrist strap cord is plugged into protective workstations, they shall be the banana jack. Go to Vermason. connected to ground via a wrist strap co.uk to choose your cord. When system. clause 5.3.2 Personnel the wearer of a wrist strap touches Figure 1. Model 225220 Wrist Strap grounding A compliance verification Tester the metallic test button, the green plan shall be established to ensure the organizations fulfillment of test good LED will light if the Description the requirements of the plan. operator-to-ground resistance The Vermason 225220 Wrist Strap Compliance verification records shall is between 800 kilohms and 10 Tester is a batteryoperated on be established and maintained to megohms. If the operator-to-ground demand wrist strap tester. When the provide evidence of conformity to resistance is below 800 kilohms, wearer of a wrist strap plugs in their the technical requirements. The test the red LOW LED will light coiled cord and touches the metallic equipment selected shall be capable and the alarm will sound. If the surface of the Wrist Strap Tester, a of making the measurements defined operator-to-ground resistance is path for current flow is completed in the compliance verification plan. above 10 megohms, the red HIGH from the wearers skin, through the clause 5.2.3 Compliance verification LED will light and the alarm will wrist strap. This action will cause plan sound. Per CLC/TR 61340-5-2 User the green test good LED to light as guide Wrist Strap clause 4.7.2.4.3 long as the resistance of the circuit Test procedure If the resistance is path is between 800k ohms and 10 still too high, dry skin might be the megohms. problem. Dry skin conditions can be resolved by applying moisturizing The Vermason 225220 Wrist Strap lotion on the wrist and repeating Tester can be used to test per EN the resistance test again. The 61340-5-1 Annex A Wrist Strap test moisturizing lotion should be one method. The operator shall wear that is compatible with process the wrist strap in the normal position requirements and does not cause it and plug the free end of the cord into contamination. the test apparatus. The hand contact Note 2: Metal expansion bracelet style wrist bands may trap moisture underneath and can be more effective for people with dry skin. If after application of ESD lotion such TM as Reztore ESD Hand Lotion, the resulting test is still fail HIGH or fail LOW, the operator should notify their supervisor to have the wrist strap and cord checked. Figure 3. Recording results. Figure 2. Testing a wrist strap UNIT C, 4TH DIMENSION, FOURTH AVENUE, LETCHWORTH, HERTS, SG6 2TD UK Phone: 0044 (0) 1462 672005, Fax: 0044 (0) 1462 670440 e-mail: Service Vermason.co.uk, Internet: Vermason.co.uk TB-7575 June 2010 Page 1 of 2 2010 Vermasonthe test electrode. Typically, the Calibration Limited Warranty maximum acceptable resistance most We recommend annual calibration Vermason expressly warrants that for a period often used for wrist strap grounding is of one (1) year from the date of purchase, of our testers. The model 225220 less than ten megohms. Vermason Statshield Wrist Strap Testers is calibrated to NIST traceable will be free of defects in material (parts) and standards. Calibration may be workmanship (labour). Within the warranty performed to ensure that the tester period, a unit will be tested, repaired or is operating within limits. replaced at Vermasons option, free of charge. Call Customer Service at 0044 (0) 1462 If you are familiar with the procedure, 672005 for a Return Material Authorisation (RMA) and for proper shipping instructions and the following resistance should give address. Any unit under warranty should be the display shown: shipped prepaid to the Vermason factory. You should include a copy of your original packing Resistance Value (1%) Test Output slip, invoice, or other proof of purchase date. 750 kilohms: Red (Low-hazard) Warranty repairs will take approximately two 850 kilohms: Green (OK-in limits) weeks. 9 megohms: Green (OK-in limits) If your unit is out of warranty, Vermason 11 megohms: Red (High will quote repair charges necessary to bring your unit to factory standards. Call Customer resistance) Service at 0044 (0) 1462 672005 for a Return Material Authorisation (RMA) and proper Resistance Range shipping instructions and address. Per EN 61340-5-1 the limit is < 3,5 x Warranty Exclusions 10E7 ohms compliance verification test method per Annex A. The lower THE FOREGOING EXPRESS WARRANTY IS MADE IN LIEU OF ALL OTHER PRODUCT limit of 750 kilohms (0.75 x 10E6) WARRANTIES, EXPRESSED AND IMPLIED, ohms is to verify the presence of INCLUDING MERCHANTABILITY AND the 1 megohm 20% current limiting FITNESS FOR A PARTICULAR PURPOSE resistor and to minimize false positive WHICH ARE SPECIFICALLY DISCLAIMED. The express warranty will not apply to defects errors. or damage due to accidents, neglect, misuse, alterations, operator error, or failure to properly The 10 megohm upper limit meets maintain, clean or repair products. the EN 61340-5-1 wrist strap system Limit of liability of < 3,5 x 10E7 ohms as 1 x 10E6 is less than 3.5 x 10E7. The 10 In no event will Vermason or any seller be responsible or liable for any injury, loss or megohm upper limit has been an damage, direct or consequential, arising industry standard for many years out of the use of or the inability to use the included in EN 61340-5-1 product product. Before using, users shall determine qualification test method ANSI/ESD the suitability of the product for their intended use, and users assume all risk and liability S1.1 Table 3 Functional Testing whatsoever in connection therewith. Limit is < or = 10 megohms or user defined value. Procedure Connect the test resistance from the banana jack to the test button. With resistance applied and test button pressed, display should yield proper output. Make sure test clips are insulated from users hands. A unit failing the calibration test will need to be returned to the manufacturer. Per ESD Handbook ESD TR 20.20 paragraph 5.3.2.4.2 Additional User Wrist Strap Testing, Proper testing of the wrist strap includes the resistance of the groundable point on the end of the cord, the cord itself, the resistor, the cord-to-cuff snap connector, the resistance of the interface of the cuff, the cuff/wrist interface, and the resistance of the person between the wrist and the hand that contacts the test electrode. Typically, the maximum acceptable resistance most often used for wrist strap grounding is UNIT C, 4TH DIMENSION, FOURTH AVENUE, LETCHWORTH, HERTS, SG6 2TD UK Phone: 0044 (0) 1462 672005, Fax: 0044 (0) 1462 670440 e-mail: Service Vermason.co.uk, Internet: Vermason.co.uk TB-7575 Page 2 of 2