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ESD TESTING SERVICES ETS has over 25 years experience in evaluating the electrostatic characteristics of material and finished product for both industry and military applications. Features
Test Standards:
^ Top Capabilities Over 25 years of experience plus a fully equipped laboratory makes ETS one of the world’s leading independent electrostatic testing facilities. ETS Testing Laboratories provides fast economical answers for the control and certification of the electrostatic characteristics of material and finished product. Testing is performed in accordance with established guidelines as specified in industry and DOD standards or customized to meet special customer requirements. Consulting services are available to perform on-site product testing and facility audits plus production line and material handling monitoring. ETS also provides ESD related product development, training, specification writing and group seminars. ^ Top Static Decay Static decay testing is currently specified for both military and commercial static safe materials. The test is based upon Federal Test Method Standard (FTM) 101C, Method 4046, “Electrostatic Properties of Materials.” Applicable specifications which utilize this method include: Mil-B-81705C, Mil-C-85043A, Mil-C-83429B, Method 5931, EIA-541, NFPA 99 and many others. Other static decay or “charge decay ” tests utilize different methods such as corona or triboelectric charging. These results are not interchangable with Method 4046. Most military and electronic industry specifications require the decay time to be measured to the 1% (50 Volt) cutoff level. Applications referenced to NFPA (National Fire Protection Association) specifications require the decay time to be measured to the 10% (500 Volt) cutoff level. Static decay testing per CECC 00015/I is a European Standard that specifies a material be charged to 1kV and the time for the material to dissipate this charge to the 50 Volt level be measured. The standard does not specify the test apparatus, and thus, different test results may be obtained with different test set-ups. ^ Top Resistivity & Resistance ETS performs resistance characterization testing in accordance with all military and commercial standards including ASTM D-257, all ESD Association Standards, NFPA 99, ASTM F-150, IEC Publication 93, Method 5930 and ISO 2878. Surface and volume resistivity per ASTM D-257 have generally been the property used to describe the conductive, dissipative or insulative range of static control materials. Surface resistivity is expressed in Ohms per square, without regard to the size of the square. Volume resistivity is expressed in Ohm-cm after factoring the thickness of the material into the equation. Surface resistance per ESD S11.11 is the latest standard to be adopted to evaluate static dissipative material. Surface resistance is expressed in Ohms with the acceptance ranges being one decade lower than those given for surface resistivity. Point-to-point and point-to-ground resistance are used to categorize worksurfaces, floors and other ESD safe materials. Other less common methods, both domestic and international, use a wide array of fixtures, probe configurations and voltages to qualify material. Contact ETS for additional information on custom resistance testing. ^ Top Triboelectric Charge Generation Triboelectric charge generation testing evaluates the ability of a material to generate a charge when rubbed or separated from another material or from itself. A material that resists tribocharging is referred to as being “antistatic.” According to the ESD Association Advisory WIP ADV11.2, many variables can effect triboelectric charge testing. These variables include: environmental, mechanical, electrical, material and data interpretation. The inclined plane method is frequently used for testing static safe packaging materials. It can be performed in two versions: indication testing and compliance testing. When testing for indication, three quartz and three Teflon® cylinders are used with each specimen. When testing for compliance, six of each cylinder type are used with each of six required samples. ETS can also perform many other industry tests to analyze the antistatic characteristics of virtually any product in either laboratory or field environments. ^ Top Static Shielding BAGS: Two versions of this test are currently performed to evaluate the electrostatic shielding characteristics of metallized film. The relative electrostatic shielding characteristics of static shielding material is determined by the Capacitive Probe Test currently specified in EIA-541 and referenced in Mil-B-81705C and ESD S11.31. The EIA-541 test consists of placing a capacitive sensor inside a static shielding bag and applying a 1000 Volt discharge to the outside of the bag and then measuring the voltage differential detected between the capacitive sensor electrodes. The differential voltage between the upper and lower electrodes of the capacitive probe defines the relative ranking between a known poor shield and a known good shield to determine the shielding effectiveness of the test bag. ESD S11.31 is an energy test that specifies a 100 pf/1.5 kOhm discharge network with a waveform meeting the requirements of ESD S5.1, “Human Body Model.” In this method, the current waveform detected inside the bag is analyzed using a special computer program to calculate the energy of the measured pulse. Other materials may also be evaluated using modified versions of these tests for relative indication testing. CONTAINERS: This test uses an ESD Simulator with a Latch Detector which is placed inside the test sample at two locations. The sample is then subjected to discharges ranging from ±5kV to 25kV. The testing is performed on both grounded and insulated surfaces. The purpose of the test is to evaluate the ability of a container to shield the contents from a direct electrostatic discharge. Both positive and negative discharge pulses are applied to different locations. After each discharge, the container is opened and the voltage on the Latch Detector is observed and recorded. ^ Top Voltage Suppression The voltage suppression test determines whether a surface such as an ESD protective work surface containing a buried conductive layer actually bleeds off the charge from an object placed on the surface or only suppresses the electrostatic field from the charged object. If the surface bleeds off the charge, the voltage on the object when lifted from the surface will be zero. If the surface only nsuppresses the charge, the voltage remains on the object when it is lifted from the surface. ^ Top Static Propensity / Dissipation PROPENSITY: This test utilizes two technicians, each wearing three pairs of shoes (sneakers, leather soled and conductive), to generate a static charge by contact with the test surface using a defined step and scuff sequence. DISSIPATION: Static dissipation is a measure of the time for a charged object or person to dissipate a known applied charge when grounded through the material or object under test. ^ Top ESD Susceptibility ESD SIMULATION: This test uses an ESD Simulator to subject the System Under Test (SUT) to discharges ranging from ±5kV to ±25kV to help determine likely failure points and voltage susceptibility levels. Testing is performed on grounded and insulated planes utilizing Mil-Std. 883, IEC 801-2 or custom test methods. PERSONNEL / CHARGED OBJECT ANALYSIS: This test consists of charging an individual or an object and discharging through the SUT to help determine likely failure points and voltage susceptibility levels. The maximum voltage for this test is ±10 kV. DEVICE SUSCEPTIBILITY: Electronic components are susceptible to an electrostatic discharge. The susceptibility to a given level establishes the category in which the component is placed. Mil-Std. 883C, Method 3015.7, Notice 8 and ESD S5.1 establish the Human Body Model (100 pf/ 1500 Ohms), the discharge waveform characteristics and the selection of the appropriate Device Under Test (DUT) pin pair combinations. In addition, this Standard establishes the category for various failure levels. ESD S5.2 is the test standard for testing to the Machine Model (200pf / 0 Ohms) that simulates a discharge from a changed object to a device. ^ Top Consulting ETS consulting services bring solutions to many electrostatic related problems in virtually all industries where static electricity can affect productivity or safety. ETS applies its extensive experience and expertise while performing on-site product testing, facility audits, plus production line and material handling monitoring. ETS provides product development assistance that can reduce or eliminate ESD related problems during manufacture, handling and end-user applications. ^ Top Training ETS Technical Seminars provide training in all areas of electrostatic measurement and control. They can be presented at either client or ETS facilities. Presentations by experienced personnel are tailored to each client’s specific requirements in such diverse fields as electronics assembly, telecommunications, manufacturing, high speed paper, plastic and synthetic material operations plus explosive device handling. Demonstrations and all necessary electrostatic instrumentation are included in every seminar. ^ Top |
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ets, electro-tech systems, inc 3101 Mt. Carmel Avenue, Glenside, PA 19038 Tel 215-887-2196 | Fax 215-887-0131 Home | Products | ESD Testing Services | ESD Consulting Services | Articles of Interest | Manuals | FAQs | About ETS Links | Directions | Sitemap | Request Information Copyright © 2004 electro-tech systems, inc. Website by Advance Design |
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