949 User Manual - Electro Tech Systems
Contents
1. TEST TARGET IEC61000 4 2 Model 949 Operating Instructions 8 14 electro tech systems INC www elec trotechsy stems com 3101 Mt Carmel Avenue Glenside PA 19038 Tel 215 887 2196 Fax 215 887 0131 1 0 2 0 DESCRIPTION The Model 949 Test Target is a current transducer that measures the discharge current waveform of an ESD pulse from an electrostatic discharge simulator The Model 949 is made in accordance with the design specified in IEC61000 4 2 It has a relatively flat freguency response out to 2 5 GHz The transconductance is 1 0 Amp Volt into a 50 Ohm load The Model 949 is fabricated from silver plated brass to provide very low surface resistance The electrical schematic is shown in Figure 1 0 1 From ESD Simulator To Oscilloscope R 2Q 25x519 R 480O 5x240Q GND Figure 1 0 1 Test Target schematic IEC 61000 4 2 specifies that the Test Target be mounted in the center of a 60x60 1 5x1 5m x 0 062 8mm plate To meet the ESD simulator waveform specified the simulator should be located approximately 39 1m from the Test Target and be connected by a 78 2m ground cable An oscilloscope having a single shot bandwidth of 1 GHz and at least a 2GS sec sampling rate is required For measuring HBM waveforms as specified in Mil Std 883C Method 3015 7 also ANSI ESDA STM 5 1 and JEDEC 114 specifications the HBM output and ground cables should be as short as practical For me2. ane shown in Figure 2 0 2 This configuration results in a HMM discharge waveform similar to that obtained with the large ground plane as shown in Figure 2 0 3 It is more user friendly and can be easily placed on a surface along with the ESD Simulator and oscilloscope Figure 2 0 2 Compact Ground Plane Assembly AX 30 000n LA 33 333MHz AY AY 3 813A a Full Ground Plane b Compact Ground Plane Assembly Figure2 0 3 Full vs Compact Gnd Plane IEC Waveforms 2 4 Mounted to the ETS Firing Test Box The Model 949 is available installed onto the ETS Model 931 FTB Firing Test Box used with the ETS Model 931 Firing Test System and Model 930 FTS as shown in Figure 2 0 3 The input side is protected by a Delrin blast shield to protect the face from the DUT being initiated This allows calibration of the ESD Simulator in the actual test configuration Figure 2 0 3 Installation onto Firing Test Box 3 3 0 OPERATION Connect one end of the 3 1m male N connector to BNC cable to the mating N connector on the Test Target Connect the BNC connector to the oscilloscope If the scope has a 50 Ohm input select 5092 Otherwise connect a 509 terminator between the cable BNC and scope input lf an attenuator is used place it between the cable and 509 terminator Connect the 78 2m ground return cable from the ESD simulator 39 1m from the center of the T
3. asuring MM waveforms as specified in ESDA STM5 2 the MM output and ground cables also should be as short as possible For measuring MMM Human Metal Model as specified in IEC 61000 4 2 the Output is specified at the conical tip if a wire connection is used the output cable should be as short as possible and the ground lead should be 78 2m in length INSTALLATION The Model 949 is available in the following three installation configurations 2 1 IEC 61000 4 2 The specified installation of the Model 949 Test Target in IEC 61000 4 2 consists of mounting it in the center of a 60x60 1 5x1 5m plate that is supplied by the user Drill a 1 5 88mm hole in the center of the plate and eight 8 0 156 4mm mounting holes equidistant around the circumference of 2 36 60mm Install the UM HWY E ESD Simulator GND 1 5m 2 36 60mm circumference 0 062 8mm plate Figure 2 0 1 Ground Plane installation This is the configuration specified to certify the HMM waveform 2 2 Stand alone The Model 949 can also be installed on other types of surfaces or even be used alone but the waveform characteristics specified for the 150pf 3302 and other similar IEC style networks Resistor and Capacitor in series before the discharge relay closure may not be met HBM and MM waveforms may not require the large plate 2 3 Compact Ground Plane The Test target is also available already mounted to a compact ground pl
4. est Target as shown in Figure 2 0 1 above This must be the cable used to perform the actual testing It should be arranged to form a large a loop possible away from the ground plane Figure 3 0 1 is a functional block diagram of the calibration set up Test Target 1 GHz ESD Simulator Oscilloscope 1MQ Input 50Q Terminator Attenuator if required 1 5x1 5m GND Plane GND Figure 3 0 1 Calibration set up functional block diagram The center discharge disc of the Model 949 has a 6 32 tapped hole This enables the user to use it as touch point for the output probe of the ESD simulator or to attach a banana jack so that a cable output from the ESD simulator having a banana plug or a clip lead can be connected directly to the Test Target NOTE The thread of the banana jack must be cut to_no longer than 1 8 3mm so as not to damage the internal resistor network Failure to follow this precaution will void the Test Target warranty Initiate a discharge and observe the resulting waveform on the oscilloscope When checking the calibration of the ESD simulator for compliance with IEC 61000 4 2 the resulting waveform should look like the waveform shown in Figure 3 0 1a When checking for compliance with Mil Std 883C Method 3015 7 Notice 8 the waveform should look like that shown in Figure 3 0 1b All a waveforms are produced when the capacitor only is contained within the CAPACITOR module and the resistor is c
5. ontained in the RESISTOR assembly that is plugged into the nose of the ESD Simulator All b waveforms are produced when both the capacitor and resistor are contained in the CAPACITOR module and a 0 Ohm resistor is plugged into the nose This configuration is generally referred to as the IEC style waveform All waveforms are obtained using an IEC specified test target ETS Model 949 Figure 3 0 1 Typical ESD simulator discharge waveforms 4 0 WARRANTY Electro Tech Systems Inc warrants its equipment its accessories and parts of its manufacture to be and remain free from defects in material and workmanship for a period of one 1 year from the date of invoice ETS will at it s discretion either replace or repair without charge F O B Glenside similar eguipment or a similar part to replace any equipment or part of its manufacture which within the above stated time is proved to have been defective at the time it was sold All eguipment claimed defective must be returned properly identified to the Seller or presented to one of its agents for inspection This warranty only applies to eguipment operated in accordance with Seller s operating instructions seller s warranty with respect to those parts of the equipment that are purchased from other manufacturers shall be subject only to the manufacturer s warranty The Seller s liability hereunder is expressly limited to repairing or replacing any parts of the eguipment manufactured b
6. r additional cost of repair due to damage Incurred during shipment as a result of poor packaging 8 2014
7. y the manufacturer and found to have been defective The Seller shall not be liable for damage resulting or claimed to result from any cause whatsoever This warranty becomes null and void should the Resistance Resistivity Kit or any part thereof be abused or modified by the customer of if used in any application other than that for which it was intended This warranty to replace or repair is the only warranty either expressed of implied or provided by law It is in lieu of all other warranties and the Seller denies any other promise guarantee or warranty with respect to the equipment or accessories and in particular as to its or their suitability for the purposes of the buyer or its or their performance either guantitatively or gualitatively or as to the products which it may produce The buyer is expected to expressly waive rights to any warranty other than that stated herein ETS must be notified before any equipment is returned for repair ETS will issue an RMA Return Material Authorization number for return of said eguipment Equipment should be shipped in the original packaging If this is not possible the eguipment should be packed in a sufficiently large box of double wall construction with substantial packing around all sides A description of the problem along with the contact name and telephone number must be included in formal paperwork and enclosed with the instrument Electro Tech Systems Inc will not assume responsibility fo
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