Schaffner NSG 438 User Manual
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Schaffner NSG 438 User Manual

Esd simulator
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NSG 438
User Manual
NSG 438
ESD Simulator
601-241D

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Summary of Contents for Schaffner NSG 438

  • Page 1 NSG 438 User Manual NSG 438 ESD Simulator 601-241D...

  • Page 3: Table Of Contents

    3.1. Electrostatic discharge (ESD) ............4 3.2. Simulation ..................4 3.3. Effects on the EUT................7 The NSG 438 system ..............8 4.1. The generator.................. 9 4.1.1. Function modules ................9 4.1.2. Block diagram................10 4.1.3. Operating elements ............... 12 4.2.
  • Page 4 NSG 438 6.3. Operation and settings..............27 6.3.1. Display mode................. 28 6.3.2. Voltage..................29 6.3.3. Polarity ..................30 6.3.4. Counter ..................30 6.3.5. Repetition ..................31 6.3.6. Settings ..................32 6.3.7. Language ..................32 6.3.8. Device info ..................32 6.3.9. Discharge ..................32 6.3.10.
  • Page 5 NSG 438 10.3. Repairs..................43 10.4. NSG 438 System error messages ..........44 10.5. Disposal ..................45 Technical specifications.............. 46 ESD standards ................48 Warranty..................49 Ordering information ..............50 Addresses ..................51 Manufacturer Schaffner EMV AG Nordstrasse 11, 4542 Luterbach/Switzerland...

  • Page 7: Explanation Of The Symbols Used In This Manual

    NSG 438 Explanation of the symbols used in this manual Please take note of the following explanations of the symbols used in order to achieve the optimum benefit from this manual and to ensure safety during operation of the equipment.

  • Page 8: Safety

    The NSG 438 generator is not a toy! It is a professional tool and belongs only in the hands of specialists and appropriately trained personnel. When powered by its own batteries the generator can be active even without any power cable being connected.
  • Page 9 The instrument's housing and the cable have both an insulating and a screening function, which can only be assured while the housing is intact. Return a damaged generator to a Schaffner service centre immediately for repair. Schaffner EMV AG Luterbach, Switzerland and the associated sales...

  • Page 10: Introduction

    NSG 438 Introduction Under appropriate ambient conditions, both material objects and even the human body itself can become charged with electrical energy. This effect is due to "electrostatics", a phenomenon that has been known since the earliest times. Thales von Milet (600 BC) noticed how amber attracted very light particles when it was rubbed.
  • Page 11 NSG 438 A simulation device must be constructed such that it reproduces practical conditions realistically. Furthermore, the results obtained (interference sensitivity threshold) must be reproducible. The interference immunity of an instrument is not only dependent on its construction, it is also largely dependent on the quality or the consistency of the mass production techniques used.
  • Page 12 NSG 438 The ESD generator NSG 438 fulfils the requirements of numerous applications in an ideal manner, thus: Ergonomic shape For non-tiring use Operation Operating elements and display always in view of the user. Constant check on the test values.

  • Page 13: Effects On The Eut

    ESD (electrostatic discharge) testing usually shows up all the weak spots in the HF-range of a piece of equipment simultaneously. The uses to which the NSG 438 ESD simulator can be put hence go way beyond those called for in standard-conform applications.

  • Page 14: The Nsg 438 System

    The NSG 438 offers optimal freedom of movement around the work-place and is an ideal test instrument not just for the development engineer but also for quality control purposes, system tests and for investigations in the field.

  • Page 15: The Generator

    NSG 438 4.1. The generator The NSG 438 generator is modularly constructed from a number of discrete function units. 4.1.1. Function modules The base station contains the battery supply, the high voltage generator and regulator as well as several safety features.

  • Page 16: Block Diagram

    NSG 438 4.1.2. Block diagram The various function units are shown in the block diagram: Block diagram of the base station: High Voltage Communication to active the PC (Opto Link) Buzzer µP Control Unit Communication to External Trigger Discharge Pistol EUT Fail Meas.
  • Page 17 NSG 438 Display with Touch - Panel Buzzer Communication to the Base Station µP Control Unit Tip Ident. Manual Trigger Network Ident. High Voltage Test Finger High Voltage Discharge Network Relay Block diagram of the pistol: The microprocessor controls and monitors all the generator functions: §...

  • Page 18: Operating Elements

    The NSG 438 is switched on and off with the main power switch. The significance of the elements in the display field can be seen in the...
  • Page 19 NSG 438 All operations are performed via the touch-panel. The following display is shown on the panel when the pistol is switched on. The function of the trigger button on the handgrip depends on the operating mode currently selected: §...

  • Page 20: System Components

    The basic set is packaged in a practical carrying case and comprises: § Carrying case § ESD generator NSG 438 consisting of a pistol and a base station with a battery power supply § Discharge network 150pF / 330Ω IEC / EN 61000-4-2 (2001) §...

  • Page 21: Options

    NSG 438 Operating advice: § Use the equipment only in dry surroundings. § Recharge the battery about every 6 months even if the instrument is not being used. 4.2.2. Options A range of additional accessories is available for special applications and for testing to alternative standards: §...

  • Page 22: Remote Triggering

    NSG 438 4.2.4. Remote triggering A remote triggering unit can be connected to operate the NSG 438 inside a Faraday cage with external pulse triggering or for test pulse triggering in synchronism with other conditions. Ext. Trigger DC IN Interlock OUT...
  • Page 23 NSG 438 Ext. Trigger: The following circuit is built in behind the connector: 120k EXT_TRIGGER (Port A.6) Ext. Trigger 10nF EUT failure Input: The same circuit is used for the EUT failure input: 120k EUT_FAIL (port A.7) EUT fail 10nF...

  • Page 24: Interlock

    NSG 438 4.2.5. Interlock The NSG 438 has an integrated interlock system in keeping with standard practice for high voltage test equipment. This system has the following functions: Inputs: Input for external monitoring purposes of, for example, special coupling networks and access control.
  • Page 25 NSG 438 To conform with VDE 0104, the control of the warning lamps must make use of the interlock feature. The instruments can be switched on and the red lamp lights up as soon as the interlock circuit is complete.
  • Page 26 8 NC, linked through to the other interlock socket 9 Switches warning lamps and peripherals on (active, provided that NSG 438 is switched from Standby to on). 10 NC, linked through to the other interlock socket 11 NC, linked through to the other interlock socket...
  • Page 27 NSG 438 The contacts should be connected in series if numerous access barriers are necessary. Either one open contact or a voltage of more than 1.5V at the input is sufficient to disable the generator. Power Relay Interlock Relay...

  • Page 28: Measurement Adapters

    NSG 438 4.2.6. Measurement adapters The measurement adapter type MD 101 as per IEC / EN 61000-4-2 (2001) serves to verify pulse amplitudes and pulse shapes. It is designed for mounting in the side wall of a Faraday cage in which an oscilloscope has been installed.

  • Page 29: Commissioning

    § Plug the interlock terminators into the base station § Connect the earth cable correctly (The NSG 438 must never be switched on without a solid earth connection being made). § Allow the instrument to dry out if any condensation has occurred 5.1.
  • Page 30 NSG 438 By bringing the test finger close to the earthing point an arc discharge occurs which is acknowledged acoustically and the display shows the preset discharge voltage in a frame. (This applies under the following conditions: Air-Discharge, single-pulse, pre-select counter off).

  • Page 31: Operation

    NSG 438 Operation This section of the manual provides a guide through the numerous operating possibilities of the NSG 438. The operation, which is strictly logical and hierarchically arranged, is therefore easy to remember. The display shows unmistakable information about the parameters that have been set and the operating status of the generator.

  • Page 32: Battery Monitoring

    NSG 438 Should a parameter need changing the operator has only to press on the relevant field in order to call up the appropriate menu. The value of discharge voltage is displayed following a successful air discharge. A differentiation is made between this and the set value by the display kV being inversed.

  • Page 33: Operation And Settings

    NSG 438 Remark A full battery will provide sufficient power for several days of normal test usage. The actual operating time depends, of course, to a large extent on the conditions prevailing at the time. The following figures have been obtained by way of reference: §...

  • Page 34: Display Mode

    NSG 438 § Only stroke the portion of the wheel displayed otherwise you might prevent it from running on freely. § There are pressure-sensitive areas (invisible) at the top and bottom edge of the display associated with the wheel with which you can adjust the relevant parameter by +1 or –1.

  • Page 35: Voltage

    Repetition Single This extended operating function is included in NSG 438 products from serial number 339 (August 2004) upwards. 6.3.2. Voltage Touching the voltage indication brings you to the sub-menu for adjusting the discharge voltage.

  • Page 36: Polarity

    NSG 438 6.3.3. Polarity Touching the polarity indication brings you into the relevant sub-menu. Choose between + or – with the wheel. If the pre-select counter function is active there is the further option of choosing alternating +/- polarity. 6.3.4.

  • Page 37: Repetition

    NSG 438 6.3.5. Repetition The Repetition button takes you into the menu to select either single pulses or a repetition rate from 0.5 to 25Hz in air discharge, or from 0.5 to 20Hz in contact discharge mode. Two further repetition modes are available that trigger pulses with a...

  • Page 38: Settings

    NSG 438 The “Free Adjust” operating function is included in NSG 438 products from serial number 521 (March 2006) upwards. 6.3.6. Settings This branches into a range of sub-menus, thus: 6.3.7. Language Touch the button and choose the language you wish to use with the wheel.

  • Page 39: Threshold

    EUT being touched. Then it has to push the trigger a second time resulting in HV off and increasing/decreasing the counts, depending on counter setting. The “Off” operating function is included in NSG 438 products from serial number 521 (March 2006) upwards.

  • Page 40: Iso-Selftest

    HV module will work properly. This voltage value will be shown on screen while it will not be possible to set a higher voltage value. This extended operating function is included in NSG 438 products from serial number 521 (March 2006) upwards.

  • Page 41: Level

    NSG 438 6.3.12. Level Provides the means to select the required, pre-programmed standard test (e.g. IEC 61000-4-2, Level 4). 6.3.13. Program Shows all the details of the currently selected settings in the “actual“ state. These values can be saved in one of the eight memory places by pressing store.

  • Page 42: Trigger Button

    NSG 438 6.3.14. Trigger button This button functions in three ways: In the Single discharge mode just one discharge is made each time the button is pressed. In the Repetitive mode pulses are generated at the pre-determined rate for as long as the button is pressed.

  • Page 43: Test Procedures

    EUT itself and the documentation. 7.1. Standard-compliant procedures The ESD Simulator system type NSG 438 is constructed in ac-cordance with the requirements called for in the standard and is calibrated in a standard-conform manner. The test engineer is duty-bound to study the relevant test requirements and adapt the facilities to suit the EUT in question.
  • Page 44 NSG 438 Repetitive discharges are only of real use to quickly localize weak spots in construction or to pin-point critical situations in program routines. Single pulses are then to be used for detailed investigations and to assess the sensitivity to interference.

  • Page 45: Verification Of The Pulse Data

    The calibration and verification of the pulse data requires a specialist test and measurement laboratory for which the IEC standard sets out certain minimal requirements. Schaffner uses the following instruments for calibration purposes: § Oscilloscope with an analogue bandwidth of min. 1GHz §...

  • Page 46: Typical Pulse Data

    NSG 438 Typical pulse data 1 ns / div. 20 ns / div. Contact-Discharge 8kV Contact-Discharge 8kV pulse rising edge (t ca. 0.8ns) current at 30ns and 60ns Reference figure quoted in IEC / EN 61000-4-2 (2001) peak 100 %...

  • Page 47: Maintenance

    The instrument contains no fuses that are accessible to the user. 10.1. Calibration Trimming procedures in the NSG 438 are carried out digitally and automatically. The instrument contains no elements that are foreseen for adjustment by the user. A component defect must be suspected if the calibration measurements differ from the published technical data and the instrument is to be returned to an authorized Schaffner service centre.

  • Page 48: Exchanging The R-C Network

    These values are valid only for the discharge network that conforms to IEC / EN 61000-4-2 (2001). Remark Schaffner offers an accredited service for this kind of work! 10.2. Exchanging the R-C network If a network needs to be exchanged, the test has to be stopped first, followed by a waiting time of at least 5s to ensure the voltage being internally discharged.

  • Page 49: Reduction Of Pulse Repetition Rate At Increased Capacity

    No other limiting effects occur, however. 10.3. Repairs Repair work is to be carried out exclusively by an authorized Schaffner repair department. Voltages in excess of 30kV are generated within the instrument: LETHAL DANGER! Only original replacement parts and accessories are to be used.

  • Page 50: Nsg 438 System Error Messages

    Schaffner service centre. VOLTAGE TOO The selected value is Reduce the voltage level. HIGH too high. HV TRAFO TOO NTC resistor too hot Power off the NSG 438 and wait after endurance runs. about 1h.

  • Page 51: Disposal

    NSG 438 10.5. Disposal The following list shows the principal materials used in the construction of the NSG 438. The relevant national regulations are to be observed when disposing of the instrument. Component material listing Pistol housing Base station front panel...

  • Page 52: Technical Specifications

    NSG 438 Technical specifications Description Compact ESD-generator with microprocessor controller, large-surface touch-sensitive LC-display, built-in HV- relay for Contact-Discharges, mains- independent operation Pulse data - std. Conforms to IEC / EN 61000-4-2 (2001) - special With exchangeable networks for other standards Pulse network - standard 150pF / 330Ω...
  • Page 53 Display LCD panel showing: Discharge voltage Breakdown voltage Polarity Air / Contact-Discharge Counter / pre-select counter content Battery state monitor Weight NSG 438: 14kg (30lbs) approx. Ambient conditions Operating +5° ... +40°C 20 ... 80% r.h. (non-condensing) 68 ... 106kPa...

  • Page 54: Esd Standards

    NSG 438 ESD standards The IEC / EN 61000-4-2 (2001) standard can be taken as a working basis. This has been renamed from IEC 801-2, 1991 into IEC 1000-4-2 as well as IEC / EN 61000-4-2 (2001) and will be accepted into national standards as part of the European harmonization.

  • Page 55: Warranty

    NSG 438 Warranty Schaffner grants a warranty of 1 year on this instrument, effective from the date of purchase. During this period, any defective component part will be repaired or replaced free of charge or, if necessary, the instrument will be replaced by another of equivalent value.

  • Page 56: Ordering Information

    NSG 438 Ordering information NSG 438 basic kit consisting of: Order No. Quantity NSG 438 ESD Simulator complete with: NSG 438 ..... Carrying case Base station Pistol Network IEC / EN 61000-4-2 (2001) 150pF / 330Ω Test fingers, ball and point...

  • Page 57: Addresses

    T +41 32 681 66 26 F +41 32 681 66 41 www.schaffner.com Subsidiary companies France China Schaffner EMC S.A.S. Schaffner Beijing Liaison Office T +33 1 34 34 30 60 T +86 10 6510 1761 / 62 francesales@schaffner.com chinasales@schaffner.com Germany Japan Schaffner Electrotest GmbH Schaffner EMC K.K.

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