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Schaffner NSG 438, Руководство пользователя

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NSG 438 

 

39 

8 

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 

§

 

Coaxial measurement adapter MD 101 

§

 

Pellegrini-target as per IEC / EN 61000-4-2 (2001) or MD 102 
according to latest draft 

§

 

20dB attenuator covering the range from dc to 12.4GHz 

§

 

SUCOFLEX-HF-coaxial cable 

§

 

High voltage dc voltmeter (Ri > 30G

Ω

) 

 
The instruments are periodically re-calibrated in accordance with the 
requirements of ISO 17025. 
 
Calibration installation with oscilloscope in a Faraday cage 

 

 

 

Содержание NSG 438

Страница 1: ...NSG 438 601 241D User Manual NSG 438 ESD Simulator ...

Страница 2: ......

Страница 3: ...tem 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 System components 14 4 2 1 Battery charger power supply unit 14 4 2 2 Options 15 4 2 3 Discharge networks 15 4 2 4 Remote triggering 16 4 2 5 Interlock 18 4 2 6 Measurement adapters 22 5 Commissioning 23 5 1 Function test 23 6 Operation 25 6 1 Switching on 25 6 2 Battery monitoring 26 ...

Страница 4: ...3 10 Threshold 33 6 3 11 ISO Selftest 34 6 3 12 Level 35 6 3 13 Program 35 6 3 14 Trigger button 36 6 3 15 Continuous operation 36 7 Test procedures 37 7 1 Standard compliant procedures 37 7 2 Other situations 32 8 Verification of the pulse data 39 9 Typical pulse data 40 10 Maintenance 41 10 1 Calibration 41 10 2 Exchanging the R C network 42 10 2 1 Reduction of pulse repetition rate at increased...

Страница 5: ...ystem error messages 44 10 5 Disposal 45 11 Technical specifications 46 12 ESD standards 48 13 Warranty 49 14 Ordering information 50 15 Addresses 51 Manufacturer Schaffner EMV AG Nordstrasse 11 4542 Luterbach Switzerland www schaffner com ...

Страница 6: ......

Страница 7: ...bol draws your attention to a circumstance where non observation of the warning could lead to inconvenience or impairment in the performance Example This connection must not be confused with the main power input The following symbol draws your attention to a circumstance where non observation of the warning could lead to component damage or danger to the operating personnel Example Never connect o...

Страница 8: ...rth cable supplied with the instrument is to be used Any replacement cables must be fabricated in such a way that they cannot be accidentally connected to a mains outlet socket Do not touch the test finger There is a danger of an unpleasant electric shock if the instrument is switched on LC display active Only trained personnel may operate the instrument Personnel fitted with a heart pacemaker mus...

Страница 9: ...nt must not be opened Repairs maintenance work and internal adjustments are only to be carried out by a qualified service engineer Use the instrument only in dry surroundings Any condensation that occurs must be allowed to evaporate before putting the generator into operation Long periods of exposure to sunlight and excessive warming by external energy sources are to be avoided Do not continue to ...

Страница 10: ... several thousand volts can be built up If now that person comes close to a conductive surface the charge that he or she is carrying flows away through a hefty spark discharge The high equalizing current that flows and the associated large electromagnetic field that hence results can cause electronic devices computers terminals process controllers vehicle electronics solid state devices credit or ...

Страница 11: ...techniques used Knowing this has led to the demand for individual testing or at least random sample testing Further weak spots which could affect the overall interference immunity can arise through the assembly of instruments into complete systems because of the installation method used the cabling and the earthing An ESD check on systems is therefore also prescribed Such tests provide valuable in...

Страница 12: ...ter pre programmed test values discharge voltage measurement etc Precision The test parameters are maintained precisely for reliably reproducible tests Flexibility The specifications prescribed in the standards are more than fulfilled in every respect The instrument also offers many additional handy features Safety The high voltage generator is automatically deactivated if the instrument remains u...

Страница 13: ...shes blocking of command sequences incorrect commands statuses or data being further processed partial system resets e g only in peripheral modules which lead to errors that the system does not recognize disturbance or destruction of interface modules destruction of insufficiently protected MOS components ESD electrostatic discharge testing usually shows up all the weak spots in the HF range of a ...

Страница 14: ...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 As supplied in the basic set the system is equipped with a 150pF 330Ω discharge network for the IEC EN 61000 4 2 2001 standard The discharge voltage of up to 30kV for both Air Discha...

Страница 15: ...attery supply the high voltage generator and regulator as well as several safety features The pistol houses the interchangeable pulse network high voltage relay the exchangeable test finger measuring electronics and the touch sensitive input display panel Pistol Display and touch panel Network exchangeable Pistol stand On Off button and emergency off switch Base station ...

Страница 16: ... µP Control Unit Buzzer High Voltage active Communication to Discharge Pistol Meas Circuit High Voltage to Discharge Pistol High Voltage Generator Interlock Unit Communication to the PC Opto Link External Trigger EUT Fail Interlock IN Interlock OUT 24 VDC PSU and Battery Power On Power Batt Status Interlock Interlock Reset ...

Страница 17: ...tery charge state is continuously monitored The display warns if there is a tendency towards low voltage The instrument s functions are inhibited once the battery voltage is insufficient to guarantee the pulse parameters High voltage generation is dynamically controlled by the processor Varying load conditions supply voltages etc can thus be taken into account and have no effect on the pulse param...

Страница 18: ...work internally with simultaneous acoustic warning A measurement facility detects an actual valid discharge and shows it on the display Pulse triggering is monitored Once an arc has occurred the network is discharged internally so that no further arcing is possible 4 1 3 Operating elements Apart from the trigger button itself pulse triggering all the operating elements test relevant setting and us...

Страница 19: ...As a pulse button in single discharge mode 1 pulse each time it is pressed As an on off switch in repetitive mode discharges while button is pressed As a pausing on off switch in repetitive mode with the preset counter in operation start the discharges by pressing the button stop the discharges by pressing the button again The remote control facility replicates the action of the trigger button by ...

Страница 20: ... suitable for input voltages between 80 and 240Vac This same unit also serves as a charger for the integral battery pack Charging of the battery takes about three hours At this point a timer switches the charger to a reduced charging current and the indicator lamp changes from red to green The battery will also charge up when the instrument is switched off A full battery charge will suffice for se...

Страница 21: ...ter Opto link to a PC H field adapter Flexible test tips Discharge remoter 4 2 3 Discharge networks The basic set contains a discharge network and test fingers for conducting tests that conform to IEC EN 61000 4 2 2001 alternative networks can be installed for testing in accordance with other standards Several networks are given in the order list The C and R values of the discharge network can als...

Страница 22: ...l pulse triggering or for test pulse triggering in synchronism with other conditions Connector pin out Connector J3 Pin assignment Pin Signal name Description 1 EXT_TRIGGER External trigger input 2 NC 3 NC 4 EUT_FAIL EUT failure input 5 GND Earth 6 NC 7 NC 8 NC 9 NC PC Interface Ext Trigger EUT Fail Interlock IN Interlock OUT DC IN J3 ...

Страница 23: ...ger The following circuit is built in behind the connector 1k 120k Ext Trigger 10nF Vcc EXT_TRIGGER Port A 6 EUT failure Input The same circuit is used for the EUT failure input 1k 120k EUT fail 10nF Vcc EUT_FAIL port A 7 ...

Страница 24: ...amp is illuminated 3 Interlock output for other system devices The interlock system is common to all Schaffner instruments and hence several devices can be connected together The instrument is equipped with two 15 way connectors for interlock input and output The interlock loop must always be correctly terminated at both ends In achieving this the interlock wiring must connect all the safety conta...

Страница 25: ...tacts Signal specifications Voltage 48Vdc max Current 20mA min 1A max Connector Socket D sub 15 pin Max permissible cable length 3m each screened cable correct operation guaranteed up to 10m Operation effected via potential free switch contacts All signals are active LOW i e switched to GND The pin out of the interlock input and output connector is identical All the pins are connected together The...

Страница 26: ...terlock 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 12 NC linked through to the other interlock socket 13 NC linked through to the other interlock socket 14 NC linked through to the other interlock socket 15 NC linked through to th...

Страница 27: ...ontacts 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 Interlock Relay EUT Power Relay ...

Страница 28: ...talled This measurement adapter has the flat impedance curve to well over 1GHz that is necessary for the purpose Use of this adapter is only worthwhile in conjunction with a test rig that is laid out in strict conformity with the relevant standard see section Verification of pulse data MD 102 Pommerenke target is a more advanced coaxial measuring target with flat response characteristics up to the...

Страница 29: ...ators 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 Function test Switch the generator on with the on off switch The instrument performs audible switching operations for a few moments as it runs through a self test and calibration procedur...

Страница 30: ...lose 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 ...

Страница 31: ...k loop is complete Plug the pistol HV connector into the base station and tighten the screws Ascertain that the base station as well as the earth cable for the pulse return path are solidly connected to the fixed installation s earth point There is a danger of electric shock if this is neglected Ensure the Emergency Power Off button is pulled out Press the Power On button The green Power LED will ...

Страница 32: ...ors such as the distance to the discharge point speed of approach nature of the EUT etc In the case of a contact discharge this measurement is not carried out since only a discharge current can occur The instrument switches itself off automatically after 15 minutes of non use 6 2 Battery monitoring The battery charge state is monitored continuously An insufficiently charged or an empty battery is ...

Страница 33: ...itive areas causes a reaction usually branching into another menu Values and indications that are not in frames are for information only Pressing the Return button always takes you up one menu level higher A virtual rotary control wheel appears in parameter setting menus Sensitivity and lent weight are matched to the parameter to be adjusted Stroking the wheel with the finger tip causes it to rota...

Страница 34: ... Try it out Play with it and you will quickly get the feel of it and how it best functions R C value shown on main screen for more convenient direct reading 6 3 1 Display mode An alternative method to the virtual thumb wheel to control the instrument has been incorporated Via the button Settings and Display mode a keyboard and up down buttons can be selected instead of the thumb wheel 26 3 kV Prog...

Страница 35: ...mber etc are handled by up down buttons to scroll through the settings 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 Set the required value with the wheel and press return 26 3 kV Voltage 1 3 2 4 6 5 7 9 8 C 0 Single Repetition ...

Страница 36: ...nter mode Preset counter ON OFF In the ON state the counter content can be set by means of the wheel When the generator is in operation the preset counter counts down until it reaches 0 which then terminates the selected test sequence Note means continuous operation without any preset counter function Pressing the trigger button starts the generator operating a second press on the same button stop...

Страница 37: ...red with a statistically distributed repetition rate ranging from a minimum of 20ms to a maximum repetition rate of 2000ms Random T Pulses are triggered during a period of 1 9999 seconds with a statistically distributed repetition rate ranging from a minimum of 20ms to a maximum repetition rate of 2000ms Free Adjust For some specific product standards the pre stored repetition times provided in Hz...

Страница 38: ...arding the version of the equipment and its software 6 3 9 Discharge Use the wheel to select either Air Discharge or Contact Discharge The RC values for the relevant network are also shown The corresponding value is automatically loaded upon switching between Air Contact Discharge when standard voltage values are selected The appropriate type of test finger must of course be mounted to suit the ty...

Страница 39: ... blinking provided 30 or more of the charge voltage is dissipated Off This position is made for EUTs with non conductive surfaces housings This means in contact discharge mode the arcing detection is disregarded and the counter counts up down as per settings in the repetition or counter menu respectively In air discharges this feature is available only in single mode Pushing the trigger once the H...

Страница 40: ...strained up to 30kV If somehow the maximum voltage could not be reached or hold the NSG 438 come out correctly with an HV error message The calibration procedure is diagnosing to which voltage level the 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 ...

Страница 41: ... the actual state These values can be saved in one of the eight memory places by pressing store Alternatively a previously saved set of values can be recalled using the wheel in the Actual program Touching Return loads the selection ready for execution mi n 20 0V Ra n d T Air 1 50 p F 3 30 Ω 4 5s 1 00 ms 4 00 m s 200 RandT Air 150pF 330Ω 45s 100ms 400ms 200 RandT Air 150pF 330Ω 45s 100ms 400ms ...

Страница 42: ...operation can be established to produce a repetitive stream of discharges thus Set the preset counter to read in the counter menu This enables continuous operation without any intervention by the counter Pushing the trigger button starts the continuous operation pressing it again stops the operation Continuous operation should only be utilized in cases of real necessity since every ESD radiates el...

Страница 43: ...able from national standards bureau 7 2 Other situations It is not always possible to arrange a test rig in exact conformity with the relevant standards However by abiding by some basic rules it is still possible to obtain meaningful assessments of a EUT s sensitivity to interference and to obtain valuable pointers to improving its immunity An electrostatic discharge is always associated with high...

Страница 44: ... the test rig details of the type and quantity of discharges notes about the ambient climatic conditions remarks concerning the effects observed etc Example of test set up for table top equipment laboratory tests Example of test set up for floor standing equipment laboratory tests Mains connection Horizontal coupling plate Ground reference plane Bleeder resistor Insulation Earth wire Base station ...

Страница 45: ...calibration purposes Oscilloscope with an analogue bandwidth of min 1GHz Coaxial measurement adapter MD 101 Pellegrini target as per IEC EN 61000 4 2 2001 or MD 102 according to latest draft 20dB attenuator covering the range from dc to 12 4GHz SUCOFLEX HF coaxial cable High voltage dc voltmeter Ri 30GΩ The instruments are periodically re calibrated in accordance with the requirements of ISO 17025...

Страница 46: ...8kV Contact Discharge 8kV pulse rising edge tr ca 0 8ns current at 30ns and 60ns Reference figure quoted in IEC EN 61000 4 2 2001 1 ns div A 30 25 20 15 10 5 0 20 ns div A 30 25 20 15 10 5 0 I peak I 100 90 I at 30 ns I at 60 ns 10 t r 0 7 to 1 0 ns t ...

Страница 47: ...ent 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 Measurements can only be undertaken by trained specialists A prerequisite is the availability of the necessary measurement equipment as listed in section Verification of pulse data Charge voltage check Equipment EHT vol...

Страница 48: ...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 Switch the generator off Open the flap under the display and rotate the pistol backwards unti...

Страница 49: ...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 Do not continue to use the instrument in the event of mechanical damage occurring The plastic housing also performs insulating and protective functions which are only assured as long as it is in its orig...

Страница 50: ...The RUN or the HV ON key has been pressed although an operator field is still selected Finish the input in the operator field and then start with RUN 201 HV INTERNAL DISCHARGE During test an internal discharge has been detected Press return on screen and trigger again If error persists contact your nearest Schaffner service centre 202 BATTERY EMPTY The battery is low and needs to be charged Rechar...

Страница 51: ...nel ABS Base station housing Galvanized steel lacquered Circuit boards Epoxi with SMD components LCD display and touch panel Glass HV module Polyurethane potting compound with elect network components and copper wire HV relay Div metals ceramic div insulating materials Test finger Brass plastics Battery Nickel metal hydride Battery charger ABS housing with transformer and circuit board with electr...

Страница 52: ...dards as accessories Range R 0Ω 20kΩ Range C 50pF 2000pF Air Discharge voltage 200V 30kV in 100V steps Tolerance 5 1 30kV Contact Discharge voltage 200V 30kV in 100V steps Tolerance 5 1 30kV Test finger standard Ball and point as per IEC exchangeable via threaded connection Arcing detection Indicated by the kV symbol being displayed inverse also acoustically in the Single operating mode Holding ti...

Страница 53: ...n 1Hz steps as well as random Random P see section Repetition Discharge voltage Pre programmed levels IEC EN and ISO standards Auto shut off After 15 minutes idle time without loss of the test parameters 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 condi...

Страница 54: ...ell as IEC EN 61000 4 2 2001 and will be accepted into national standards as part of the European harmonization The following documents are either identical or largely compatible EN 61000 6 1 2001 Generic Immnity standard for residential and light industrial environments EN 61000 6 2 2001 Generic lmmunity standard for industrial environments as well as others ...

Страница 55: ...ating the functional capability is at the sole discretion of Schaffner Excluded from the warranty is damage or consequential damage caused through negligent operation or use as well as the replacement of parts subject to degradation The warranty is rendered invalid by any intervention on the part of the customer or a third party The goods are to be returned in the original packing or other equival...

Страница 56: ...rder No Quantity Discharge network ISO 10605 150pF 2kΩ INA 4381 Discharge network ISO 10605 330pF 2kΩ INA 4382 Discharge network ANSI hand model INA 4383 Discharge network ANSI furniture model INA 4384 Test finger for fast pulse rise times 400ps INA 4411 Tripod adapter INA 4421 Carrying bag for the base unit INA 4422 Opto link to a PC with 10m opto cable INA 417B Discharge network special executio...

Страница 57: ...ales schaffner com Germany Japan Schaffner Electrotest GmbH Schaffner EMC K K T 49 30 5659 8835 T 81 3 5456 8929 desales schaffner com japansales schaffner com Switzerland Singapore Schaffner EMV AG Schaffner EMC Pte Ltd T 41 32 681 66 26 T 65 6377 3283 switzerlandsales schaffner com singaporesales schaffner com UK USA Schaffner EMC Ltd Schaffner EMC Inc T 44 118 977 0070 T 1 732 225 9533 uksales ...

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