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HVA4321

1. 4 2 Operation example in constant current mode total This section describes operation example of this unit in total mode of constant current mode In constant current mode the output current varies according to the input signal If high frequency AC signal is given at high voltage leak current runs with stray capacitance between the cable and the ground Therefore not all current from the output terminal of the unit goes to load In total mode current including leak current due to cable capacity is controlled Set current Leak current Load current Effect of stray capacitance of the cable is found only for AC signal output Effect of stray signal 1s not found for DC signal The TOTAL terminal of OUTPUT Lo is connected to the casing ground Therefore the total mode can be used for grounded load or load that can be grounded A WARNING When the internal high voltage DC power supply is ON and SIGNAL is ON with the output open maximum 12 kV output is given to the OUTPUT Hi terminal It is very dangerous Do not turn ON SIGNAL when the output is open In constant current mode be sure to connect load or short circuit the output When the internal high voltage DC power supply is ON and SIGNAL is OFF with the output open 100V voltage output may be given to the OUTPUT Hi terminal depending on the voltage limiter settings A WARNING In constant current mode DC cannot be run
2. Figure4 45 Power supply b Supply of high voltage DC power Turn the HIGH VOLTAGE POWER SUPPLY switch to the right and unlock it Turn ON the internal high voltage power supply The ON LED of the internal high voltage power supply lights In several seconds the SIGNAL switch OFF lamp changes from blinking to lighting When the power is supplied the internal high voltage DC power supply is always OFF regardless of ON OFF status of the HIGH VOLTAGE POWER SUPPLY switch If this switch is ON turn OFF once and turn it ON again HVA4321 4 35 4 3 Operation example in constant current mode load Turn to the right for unlocking e Eois ding ON LED lights Be sure to press the above switch to turn OFF the HV power for safety when the output wiring is changed Figure4 46 Internal high voltage DC power ON A WARNING After this operation the internal high voltage DC power supply is ON High voltage is generated inside the unit Be careful not to touch the area like an output terminal to which high voltage is applied OWhen the SIGNAL OFF switch remains blinking When the SIGNAL OFF switch remains blinking after unlocking the HIGH VOLTAGE POWER SUPPLY switch check the following 1 Is the shorting plug inserted into the HIGH VOLTAGE POWER SUPPLY ON OFF terminal at the back Action Insert the shorting plug for operation in LOCAL mode 2 Is the DC CURRENT value the minimum and is TRIP selected Action Incre
3. sesssessesesieeesereenn nnnn anne nennen nnn 4 10 Using internal DC bias Signal 2 c ccceeeece cece ee ee ee ee eee cece ee eee ence nnn nne nn nnn nnn nenn 4 11 Using external oscillator 2 nes 4 12 Using external DC bias signal c ccceeeeeeeeeeee cece ee eee ence ee eee ee ee nennen nnn nnn nennen 4 12 Total mode oue cous Seed viet cc Don recep rod Rose d datcuecensaaneccusosdencnehcecuduatcccdusvaae 4 15 Internal high voltage DC power OFF 22 ccccceeeeeee cece ann nnn nn an nnnnnnnannnnnnnnnnnnn nennen 4 16 Switch SeftingSs n uun ara to id 4 16 Output mode Settings ac niae ipiis 4 17 Local settings uuu id 4 17 LEimiter settings 2 220 0 ea rire le e apa anaua E aaa Eaa Aaa a aaia aia a aaa 4 18 Current monitor mode settings eese nennen nennen nnn nnn 4 18 Response Settings siii id lil lalalala gen Ede ees 4 19 Connection of external signal source SigNal oooonncconccnnncccnnnccnncnnnnennnnnnnnnnnnnnnnennnanennns 4 19 Connection of monitor unssensseeennnenennnnnnennn nn eee ee ee enne nennen nnn nn nnn nennen nnne nnns 4 20 Connection of output cable issis snoeihard adada taada arad daai adaa daa 4 20 d LIC 4 22 Internal high voltage DC power ON us4444444444nRnHnnnnnnn mann nn annnnnnnnmnnnn nennen nenn nnn 4 23 Using internal DC bias Signal ccccceeeece cece ee ee ee ee eee
4. 3 1 4 ON OFF switch for input signal to the amplifier O ON OFF CONTROL Switch to change SIGNAL ON OFF or ON OFF of each signal to LOCAL Panel operation exce uz 3 2 2 O DC CURRENT LIMITER Sets the maximum output current LIMIT Only limiting TRIP Stops operation when eding the set value O VOLTAGE LIMITER Sets the maximum output O RESPONSE Makes fine adjustment response waveform 3 5 Nomenclature of step O OVERLOAD Lights for overload status or when the limiter is activated HVA4321 O EXT DC BIAS INPUT BNC connector to give external DC bias input tz 3 1 2 O SIGNAL ON OFF STATUS OUTPUT Gives signal that indicates SIGNAL ON OFF status 3 3 2 3 3 1 O MONITOR VOLTAGE BNC connector for output voltage monitor 3 18 CV CV mode for DC CC CC mode for DC 3 2 1 current to load is controlled LOAD When this terminal is used the current to load is controlled ignoring
5. FUSE HOLDER Fuse holder This unit uses a AC250V 10A fuse 7 3 4 Sem i i eo S ossis ground terminal when TTL H OFF grounding is not available with a power cable T 104 250V 7 3 4 Or Q TTLa ON TT La ON ZN SIGNAL ON OFF STATUS d 5 4 3 2 R AC 250V 3A MAX Q3 DC 30V 3A MAX L OSC INPUT ON OFF SIGNAL ON OFF STATUS EXT DC BIAS ON OFF OLINE Gives ON OFF control signal input Gives contact signal output linked to SIGNAL Gives ON OFF control signal of Inlet to connect the power cable of the external oscillator for remote ON OFF status external DC bias signal for remote Be sure to connect the accompanying control operation 7 3 3 2 control operation 3 pin power cable to the outlet with 3 3 2 17 3 3 2 ground for safety tg 3 4 HVA4321 3 19 4 Operationmethod 4 1 Operation example in constant voltage mode 4 1 4 1 1 Panel setting aera Rag aw ya BAe an aaa 4 3 4 1 2 Connection of signal source and connection of load s ttt ttt ett eee 4 6 4 1 3 Power supply and internal high voltage DC power supply Sa a eR ep Rex mete ce Tenet GAR AE RUE 4 9 4 1 4 Signal output and adjustment ren 4 11 4 1 5 Signal OFF om o o3 3 3 3 9 9 3 3 3 3 3 3 3 3 NON 3 3 3 O3 3 3 9 3 3 9 4 13 4
6. F Figure4 31 Using internal DC bias signal b Using external oscillator Connect the external oscillator to OSC INPUT and make sure that the oscillator output level is OV Set the GAIN knob to TOP Turn ON the external oscillator ON OFF switch and press ON ofthe SIGNAL switch While reading the value on the voltmeter or oscilloscope connected to the voltage monitor increase the output level of the oscillator gradually If fine adjustment of the output level is required adjust it at the oscillator or adjust it with GAIN of the unit Turn GAIN to the left the gain is decreased Turn GAIN to the right the gain is increased The gain can be adjusted in the range of approximately 3 HVA4321 4 24 4 2 Operation example in constant current mode total Adjust it to the Set to 0 desired level Select polarity SET S RT GAN DY EP Q e BE Make fine Gatto TOP to TOP adjustment Oscillator Figure4 32 Using external oscillator c Using external DC bias signal source Connect the DC standard power supply to EXT DC BIAS INPUT and make sure that the output of the standard power supply is OV Turn ON the external DC bias ON OFF switch and press ON of the SIGNAL switch While reading the value on the voltmeter or oscilloscope connected to the voltage monitor increase the output level of the DC standard power supply gradually and set the desired voltage Adjust it to the Set to 0 des
7. High voltage cable A600B80 approx 2 m by ALDEN Ground cable 0 75 mm2 with M6 crimp terminal approx 4 m black Ground cable 0 75 mm2 with M6 crimp terminal approx 4 m white If appearance of the product shows unusual damage or if accessories are insufficient contact us or our agent A WARNING This product contains high voltage parts Absolutely never remove its cover Otherwise touching the internal circuit may result in death by electric shock HVA4321 2 1 2 2 Installation LA 2 2 Installation B Before installation This product has a positive air conditioning system with back intake and side exhaust fans to cool the inner parts To allow ventilation of air install this product with the side and the back by 30 cm or more apart from walls The range of ambient temperature and humidity for this product is as follows Performance assurance Temperature 5 Cto 35 C Humidity 45 to 85 no condensation Operation assurance Temperature 0 Cto 40 C Humidity 10 to 85 no condensation Storage condition Temperature 10 Cto 50 C Humidity 10 to 80 no condensation B Installation environment Do not install or use the product in the following environments Place where there is much corrosive gas moisture dirt dust or conductive particles Failure such corrosion or deteriorated insulation may occur Place where there is flammable gas Explosion may occur Place where an object m
8. unnssseennnsnnnennnnnnnennnnnnnnnnnnnnnnnnnnnnnnnnnnnnennnsnnnnnnn nennen 6 1 T Maintenance 7 1 7 2 7 3 7 4 Daily maintenanco iiri teuer PERI REDI ERR 7 1 Inspection MIC EE 7 2 When the unit is not used for a long time nssunssnnennnnnnnennnnnnnnnnnnnnnnnnnnnnennn nn 7 2 Performance test eor a i can 7 3 7 4 4 Test of constant voltage MOE cccceceee cece ee ee ee ee cece ee ee ee eee ee ee ee ennt hr nennen nennen 7 3 7 4 2 Test of constant current MOEC ccccceeeee cece eee e ce ee eee aani ee nennen nnnnnnannn nenn nenne 7 4 HVA4321 vi Contents 8 Specification 8 1 Signal ASA e ia ays 8 1 8 2 OA A eei sies 8 2 8 2 1 Characteristics of constant voltage mode nesnnsssennnnnnennnnnnnennnnnnnnnnnnnnnn nennen 8 2 8 2 2 Characteristics of constant current MOCE ccceeeeeeeeeeee ence ence anne ann nannn nenn nennen 8 4 8 3 O tpu ut area ineunte da 8 5 8 4 Monitor OUtPUE LEE 8 5 8 5 Other input output signal ccccecece cece cece cece dannes eee ee ee esee nnnm nennen nnne 8 6 8 6 Protecti n circuit croceo ias 8 7 8 7 Others RR 8 7 8 8 General ideas ad i 8 8 HVA4321 vii Figures Figure1 1 Figure2 1 Figure2 2 Figure2 3 Figure2 4 Figure2 5 Figure3 1 Figure3 2 Figure3 3 Figure3 4 Figure3 5 Figure3 6 Figure3 7 Figure3 8 Figure3 9 Figure3 10 Figure3 11 Figure3 12 Figure3 13 Figure3 14 Figu
9. LT Figure4 59 Connection of external signal source signal HVA4321 4 45 4 4 Operation example in constant current constant voltage mode TE een AN CAUTION The DC signal in the internal bias signal source or EXT DC BIAS INPUT can be used as the constant voltage signal source If a DC input is given into OSC INPUT the DC component is cancelled in this unit and the output is not given CAUTION The DC signal in the internal bias signal source or EXT DC BIAS INPUT can be used as the constant voltage signal source If a DC input is given into OSC INPUT the DC component is cancelled in this unit and the output is not given b Monitor signal output Connect a measuring instrument such as oscilloscope or voltmeter to VOLTAGE MONITOR or CURRENT MONITOR as required rm Oscilloscope Voltmeter 00 Ta 00 00 O 000 O k 000 gn 00 p Figure4 60 Connection of monitor HVA4321 4 46 4 4 Operation example in constant current constant voltage mode c Connection of load Be sure to use the accompanying cable for the cable connected to Hi To minimize effect from stray capacitance shorten the cable length as much as possible an
10. MAX Figure4 39 Limiter settings E Voltage limiter The voltage limiter function can limit the maximum value of the output voltage independently for positive and negative values in the range from 5 kV to 10 kV For example the output is sufficient up to 8 kV set the VOLTAGE LIMITER to 8 kV and 8 kV When voltage limitation is not required set it to MAX B Current limiter The current limiter function can limit the average value of the output current in the range from 0 mA to 10 mA For example to limit the output current up to 5 mA set it to 5 mA When current limitation is not required set it to 10 mA which is turned to the rightmost position B LIMIT TRIP Set the protection mode for activation of the current limiter When LIMIT is selected current is limited to the set current When TRIP is selected the input signal is immediately OFF for activation of the current limiter circuit and the output is OV Select either one as required f Current monitor mode settings In load mode of constant current mode set it to LOAD CURRENT Figure4 40 Current monitor mode settings HVA4321 4 3 4 3 Operation example in constant current mode load ERA LAR g RESPONSE knob settings Set the CC RESPONSE knob to the rightmost position RESPONSE Turn to the rightmost cv cc eff stl JA De Figure4 41 Response settings 4 3 2 Connection of signal source and
11. On the panel surface The OFF lamp of the signal switch blinks The OFF LED of the internal high voltage DC power supply lights TR Figure4 29 Power supply b Supply of high voltage DC power Turn the HIGH VOLTAGE POWER SUPPLY switch to the right and unlock it Turn ON the internal high voltage power supply The ON LED of the internal high voltage power supply lights In several seconds the SIGNAL switch OFF lamp changes from blinking to lighting When the power is supplied the internal high voltage DC power supply is always OFF regardless of ON OFF status of the HIGH VOLTAGE POWER SUPPLY switch If this switch is ON turn OFF once and turn it ON again HVA4321 4 22 4 2 Operation example in constant current mode total H GH VOLTAGE Turn to the right for unlocking POVER SURA NV ON LED lights Be sure to press the above switch to turn OFF the HV power for safety when the output wiring is changed Figure4 30 Internal high voltage DC power ON A WARNING After this operation the internal high voltage DC power supply is ON High voltage is generated inside the unit Be careful not to touch the area like an output terminal to which high voltage is applied OWhen the SIGNAL OFF switch remains blinking When the SIGNAL OFF switch remains blinking after unlocking the HIGH VOLTAGE POWER SUPPLY switch check the following 1 Is the shorting
12. O Current monitor Ide 3 lac O LOAD Voltage monitor Current detection resistance for load Output terminal jou gt 79 OUIPUT H toa Internal capacity Wire capacity RR Current detection resistance for total OUIPUT Io gt rra ES z Current monitor LOAD Q Y Current detection resistance Voltage monitor for load Figure4 51 Constant current constant voltage mode load mode In constant current constant voltage mode the current detection circuit detects AC components and the voltage detection circuit detects DC components for independent control Total mode and load mode can be used same as normal constant current mode HVA4321 4 4 4 4 Operation example in constant current constant voltage mode 4 4 1 Panel setting a Internal high voltage DC power supply OFF When HIGH VOLTAGE POWER SUPPLY switch is not OFF press the button until a click sound is heard When a click sound is heard the switch is locked in OFF status The internal high voltage DC power supply is always OFF Press the switch until a click From side sound is heard r H H GH VOLTAGE B POWER SUPP ON H OFF B Locked status Figure4 52 Internal high voltage DC power OFF b Signal system OFF Turn the internal DC bias knob to the leftmost position to minimize the v
13. 3 3 Monitor and control signal system LL M MM um 3 3 Monitor and control signal system 3 3 1 Monitor B MONITOR VOLTAGE It is the BNC connector for the monitor signal of output voltage Gain 1V 1kV Output impedance 50 Q 10 E MONITOR CURRENT It is the BNC connector for the monitor signal of output current In constant current mode current selected by TOTAL LOAD is monitored Gain 1V 10 mA Output impedance 50 Q 10 S8 GNAL ON OFF STATUS MON TOR OUTPUT CURRENT 1M 10mA Zou 50 Q Figure3 15 Monitor output B SIGNAL ON OFF STSTUS It is the total level signal output that indicates SIGNAL ON OFF status When the signal is ON the level is low approx 0 1V or less When the signal is OFF the level is high approx 4 5V or more 1 Signal switch SIGNAL SWITCH SIGNAL ON OFF STATUS Figure3 16 Status signal output HVA4321 3 11 3 3 Monitor and control signal system LA 3 3 2 Control signal system B ON OFF CONTROL Itis the remote local setting switch In LOCAL the unit can be turned ON OFF with the panel switch In REMOTE the unit can be turned ON OFF with an external signal In REMOTE the operation of HIGH VOLTAGE POWER SUPPLY ON OFF can be made with the panel HIGH VOLTAGE POWER SUPPLY ON OFF Internal DC high voltage ON OFF SIGNAL ON OFF High voltage amplifier input ON OFF OSC INPUT ON OFF External oscillator signal ON OFF INT DC BIAS ON
14. 5 ane E gt Accompanying return cable Figure4 12 Connection of output cable HVA4321 4 7 4 1 Operation example in constant voltage mode ILL MM AN CAUTION Match the setting of the return terminal with that of the CURRENT SELECT switch If it is different current cannot be monitored The TOTAL CURRENT terminal is connected to the casing A WARNING Tighten the binding post terminal of OUTPUT Lo securely If it is loose electric shock may occur when touching the load grounding or the return cable Check sometimes if it is not loose when the power is OFF and it is safe HVA4321 4 8 4 1 Operation example in constant voltage mode LS 4 1 3 Power supply and internal high voltage DC power supply a Power supply Before supply of power check again if the HIGH VOLTAGE POWER SUPPLY switch is OFF button is pressed After checking connection to load connection to the signal source and if the panel settings are correct turn ON the POWER switch of the unit When the power is ON the fan at the back starts operation On the panel surface The OFF lamp of the signal switch blinks The OFF LED of the internal high voltage DC power supply lights Figure4 13 Power supply b Supply of hig
15. Figure8 2 Voltage and current range allowed for output B Frequency characteristics Major amplitude characteristics DC Up to 7 kHz Frequency range allowed for 10 kVpk output Measured with a high voltage probe Model P6015A by Tektronix with connection to the rated resistance load load connection cable of 10 cm or less and with the RESPONSE dial turned rightmost Minor amplitude characteristics DC Up to 45 kHz 3 dB Measured with a high voltage probe Model P6015A by Tektronix without load with 1 kVpk output and with the RESPONSE dial turned rightmost B Slew rate 500 V Q or more Measured with a high voltage probe Model P6015A by Tektronix with 10kVpk output and with the RESPONSE dial turned rightmost E Output residual noise 500 mVrms or less At OV output the output terminal is measured with the RMS value AC voltmeter M 170 by NF Corporation bandwidth of 20 MHz or its equivalent E Output offset voltage 20 V When the ON OFF switch of each signal source is OFF and the signal ON OFF switch is ON HVA4321 8 3 8 2 Amplifier LIA 8 2 2 Characteristics of constant current mode B Amplifier gain 1 mA 1V E Gain accuracy when the external signal source for DC bias is used 0 5 of full scale E Gain temperature drift B Maximum output current 10 mApk for DC AC B Maximum output voltage 10 kVpk for DC AC E Rated load Resistance load 1000 k Q B Frequency characteristics Major amplitude c
16. The lamp lights Figure4 67 Input signal OFF A WARNING When this SIGNAL is OFF the internal high voltage DC power supply continuously gives high voltage output In this status never touch the output cable or the high voltage area for safety to change load b Internal high voltage DC power supply OFF Press the HIGH VOLTAGE POWER SUPPLY switch to turn it OFF When this switch is OFF the internal high voltage DC power supply is OFF Press H GH VOLTAGE POWER SUPP Om Q err 08 ZN EIERN EE EF SE SAWS EO A4 Y FEL FUCK ESL Figure4 68 Internal high voltage power supply OFF HVA4321 4 53 4 5 Change of load and power OFF c Power OFF Check the following points before the POWER is OFF The ON LED of HIGH VOLTAGE POWER SUPPLY is OFF and the OFF LED is ON ALL high voltage output display LEDs are OFF The voltage monitor output is almost OV H GH VOLTAGE Make sure that the Seas OFF LED is ON O ON Sa N PULL ON pes Be sure to press the above switch to turn OFF the power for safety when the output wiring is changed DANGER Make sure that all Never touch the output cable for OUTPUT H LEDs are OFF safety during output BS EDS AN 10kV MAX Make sure that there is no output to the monitor MON TOR VOLTAGE CURRENT AW1kV 1V1mA Zou 50 Q Zou 50 Q Figure4 69 Checking items before power OFF After checking i
17. 1 3 1 Signal system LIA 3 1 3 External signal input B OSC INPUT It is the BNC connector to give amplified input on this unit with an external oscillator Rated input voltage 10 Vpk Input impedance 10 kQ 10 B GAIN The signal gain given to OSC INPUT can be fine adjusted in the range of approx 13 It is turned with a flat tip screwdriver B NORMAL INVERT The signal polarity in OSC INPUT is set In NORMAL the input signal polarity is the same as the output signal polarity In INVERT the input signal polarity is reverse to the output signal polarity Figure3 3 External signal input B ON OFF Valid or invalid signal in OSC INPUT is set When it is ON the signal in OSC INPUT is valid CAUTION The input voltage range to OSC INPUT and EXT DC BIAS INPUT terminals is 10V 3 1 4 Input signal ON OFF B SIGNAL ON OFF Input to the amplifier area for INT DC BIAS EXT DC BIAS and OSC INPUT is switched ON OFF When it is ON each input signal is given to the high voltage amplifier Figure3 4 Signal ON OFF switch HVA4321 3 2 3 1 Signal system LIA A WARNING This signal ON OFF switch has the function to set whether or not the input signal is transmitted to the high voltage amplifier It does not switch ON OFF the connection between the high voltage amplifying output and the output terminal of this unit The output from the high voltage ampl
18. 20 MHz or its equivalent without load at OV output Output resistance 50 Ox10 96 Terminal BNC Front panel E Output current monitor Gain 1V 10 mA DC gain accuracy 0 5 of full scale Output offset voltage 3 mV When high voltage output is given Output residual noise 3 mVrms or less Measured with the RMS AC voltmeter M 170 by NF Corporation bandwidth of 20 MHz or its equivalent when high voltage output is given Output resistance 50 Q410 Terminal BNC Front panel HVA4321 8 5 8 5 Other input output signal LISSE 8 5 Other input output signal B Remote control signal input REMOTE CONTROL INPUT Function ON OFF of internal signal source for DC bias signal input for oscillator and external signal input for DC bias and Batch ON OFF SIGNAL ON OFF of the above signals Input Depends on TTL level signal or contact signal Lo or short circuit ON Hi or open OFF Input method BNC Back panel E internal high voltage DC power supply ON OFF signal input HIGH VOLTAGE POWER SUPPLY ON OFF Function ON OFF of internal high voltage DC power supply When it is OFF SIGNAL is also OFF Input Depends on TTL level signal or contact signal Lo or short circuit ON Hi or open OFF Input method BNC Back panel BNC for short circuit is accompanied E ON OFF status contact output SIGNAL ON OFF STATUS Function Contact output linked to the ON OFF status ofthe signal Contact rating Max AC 250 V 3A or DC 30V 3A Output met
19. 4 6 Remote control 4 6 1 Remote control When the unit is used on a rack or when it is difficult to perform operation on the panel for safety of an operator a part of the panel can be operated in remote control mode In remote control mode the following operations are available HIGH VOLTAGE POWER SUPPLY ON OFF ON OFF of internal DC high voltage power supply SIGNAL ON OFF Signal input ON OFF to amplifier OSC INPUT ON OFF Signal ON OFF to external oscillator INT DC BIAS ON OFF Internal DC bias signal ON OFF EXT DC BIAS ON OFF External DC bias signal ON OFF TTL level logic signal and contact signal can be used as control signal Digital IO interface REMOTE CONTROL INPUT D H GT VOLTAGE POWER SUUPPLY ON OFF TTL level logic signal 7 ON OFF control d S GNAL ON OFF INT DC BAS ON OFF Relay I O Contact signal TTULa ON OSCI NPUT ON OFF EXT DC BASON OFF 3 Switch Computer s E d rt Contact signal ar Figure4 72 Remote control HVA4321 4 57 4 6 Remote control LA 4 6 2 Panel setting for use of remote control Set the ON OFF CONTROL switch on the front panel to REMOTE When the switch 1s set to REMOTE LEDs of DC BIAS ON OFF OSC INPUT ON OFF and EXT DC BIAS INPUT ON OFF switches go off regardless of ON OFF status of these switches indicating that the switching function is invalid If this operation is perfor
20. 9 kV the color changes from orange to red B Gain adjustment with RESPONSE The gain of the 200 Hz band or more may vary depending on the RESPONSE knob position Refer to 5 3 Characteristics in constant voltage mode Chapter 5 When the frequency is used at 200 Hz or more measure the output voltage of the voltage monitor and adjust RESPONSE so that the desired amplitude may be obtained HVA4321 4 38 4 3 Operation example in constant current mode load 7 A WARNING It is very dangerous during output of high voltage Never touch the output cable or the high voltage area If you find a dangerous status due to a unit error or load error turn OFF the power switch immediately 4 3 5 Signal OFF a Input signal OFF To set the output signal to OV temporarily press OFF of the SIGNAL switch A WARNING When SIGNAL is OFF the output voltage is OV but the internal high voltage DC power supply is ON It continuously gives high voltage output In this status never touch the output cable or the high voltage area for safety b Internal high voltage DC power supply OFF When the HIGH VOLTAGE POWER SUPPLY switch is turned OFF the output of the internal high voltage DC power supply is OV and the amplifier cannot give high voltage output HVA4321 4 39 4 4 Operation example in constant current constant voltage mode EA gt AN 4 4 Operation example in constant current constant voltage mode This section describes operatio
21. BOB BOR B OS SON BOR OR 3 3 ar 3 3 3 3 NOB 3 3 3 3 3 18 3 5 2 Rear panel NE 3 19 3 1 Signal system 3 1 Signal system 3 1 1 Internal DC bias signal source B DC BIAS This sets the output level of the internal DC bias signal source With combination of the pin switch settings are available in the range of In constant voltage mode 0to 10kV In current mode 0 to 10 mA Figure3 1 In constant current and constant voltage mode Internal DC bias signal source 0to 10kV To prevent inadvertent rotation of the dial use the rotation lock function of the dial When the rotary lock knob is pressed clockwise the dial is locked B Polarity of the internal DC bias signal source is set With the output is positive and with the output is negative B ON OFF It is the ON OFF switch for the internal DC bias signal source When it is ON the internal DC bias signal is effective 3 1 2 External bias signal input B EXT DC BIAS INPUT It is the BNC connector to give external input of the DC bias signal Rated input voltage 10 Vpk Input impedance 10k Q 10 AC signal input can also be given But the input is only for DC Frequency characteristic and slew rate are inferior to the OSC input B ON OFF Valid or invalid external DC bias signal is set When it is ON the external DC bias signal input is valid Figure3 2 External DC bias input HVA4321 3
22. Connection of monitor urssenssneennnnnennnnnnennnnnnnennnnnnenn nnne nn nn nnn innen nnne nnn nnns 4 46 Connection of output cable uuuuununsnenennnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nun nun nnnnnnnnnn nun nn 4 47 Power di uec M 4 48 Internal high voltage DC power ON 2 ccceeeceeeee ee ee ee ann nn nnn nn eee ee enn nennen nnn nennen 4 49 Using internal DC bias Signal ccceceeeece cece eee ee ee eee ee ee ee ee ee ene en nennen nnn nennen 4 50 Using external oscillatori cece cece eee ee ee ee eee ee ee ee eee ence ne eee eee nese see eee nnne nn seen 4 51 Using external DC bias signal 0 cccceeeeeee cece cece ee eee ence ee eee eeae nese see eeeaeeseeeeeee eee 4 51 tnb uEIBolumme 4 53 Internal high voltage power supply OFF 2 cceeeeeeeeeeeeeeeeeeeeeeeeeeeseeeeeeeeeeeeeeeaeeeaes 4 53 Checking items before power OFF 2 c ccseceeeeeee cece eee eeeeeeeeeeeaeeseeesaaeeseeeseaeeeeaeeeeeee 4 54 POWER OFF pee TEM 4 54 Removing high voltage cable cccccceeeeeee cece ener ee ence ee eeee ee eeeeeeaeeesaeeseeeseeeeeseeesaeeeaee 4 55 STAR 4 57 Remote control SWItCH ccc cece eese cnn nr rro 4 58 Compensation of Probe ui kennen 5 1 Measuring method of output voltage c cece cece ee eee eee e ee ee ee ee ee nese eeee nese eee enter 5 1 Measu
23. Describes functions movements and basic operations for knobs on the panel Read this manual while operating the unit OPERATION Describes operation of this product REPRESENTATIVE CHARACTERISTICS Describes representative characteristic of this product TROUBLESHOOTING Describes corrective actions when problems occur MAINTENANCE Describes basic operation tests and daily maintenance procedures SPECIFICATIONS Lists the specifications functions and performance HVA4321 i Safety Precautions To ensure safe use be sure to observe the following warnings and cautions NF Corporation shall not be held liable for damages that arise from a failure to observe these warnings and cautions This product is a Class 1 product with protective conductor terminal that conforms to the JIS and IEC insulation standards Be sure to observe the contents of this instruction manual This instruction manual contains information for the safe operation and use of this product Be sure to read this information first before using this product All the warnings in the instruction manual must be heeded to prevent hazards that may cause major accidents O Be sure to ground the product This product uses a line filter and must be grounded to avoid the risk of electric shock To prevent electric shock be sure to safely implement grounding according to Japanese Standard for Electrical Equipment Technology D Type 3 or highe
24. Range of power supply voltage Single phase AC 100 V 10 Frequency of power supply 50 Hz 60 Hz 2 Hz Power supply fuse AC 250V 10 A Time lag 2 x 20 mm Power consumption 800 VA or less B Installation environment of unit Installation position of unit Horizontal 10 or less Cooling method of the unit Forced air cooling Intake from back exhaust from sides Sufficient space 1s provided at the back and sides of the unit not to disturb air cooling function E Environment condition Performance guarantee Temperature X5 0 35 0 Humidity 107 85 RH No condensation Operation guarantee Temperature 0C 40 C Humidity 10 85 RH No condensation Storage Temperature 10 C 50 C Humidity 10 80 RH No condensation B Insulation resistance Power supply input to casing 30 M Q or more with DC 500 V E Voltage resistance Power supply input to casing AC 1500 Vrms for 1 minute E External dimensions 440 mm width x 177 mm height x 450 mm depth excluding handle and protrusions B Weight Approx 18 kg HVA4321 8 8 WARRANTY This product is shipped after having undergone full testing and inspection of the NF Corporation Should this product fail due to a manufacturing flaw or due to a mishap during shipping contact NF Corporation or an NF Corporation sales representative NF Corporation products purchased either from NF Corporation or from an NF Corporation sales representative are guaranteed for one full year from the date o
25. current runs with stray capacitance to the TOTAL CURRENT terminal Accompanying high voltage cable capacitance Ground plans le Accompanying return cable Figure4 44 Connection of output cable HVA4321 4 33 4 3 Operation example in constant current mode load LA A CAUTION In load mode be sure to use the LOAD CURRENT terminal for the return terminal of load current Use the TOTAL CURRENT terminal for the return terminal of leak current A WARNING Tighten the binding post terminal of OUTPUT Lo securely If it is loose electric shock may occur when touching the load grounding or the return cable Check sometimes if it is not loose when it is safe with the power OFF HVA4321 4 34 4 3 Operation example in constant current mode load LI 4 3 3 Power supply and internal high voltage DC power supply a Power supply Before supply of power check again if the HIGH VOLTAGE POWER SUPPLY switch is OFF button is pressed After checking connection to load connection to the signal source and if the panel settings are correct turn ON the POWER switch of the unit When the power is ON the fan at the back starts operation On the panel surface The OFF lamp of the signal switch blinks The OFF LED of the internal high voltage DC power supply lights
26. dozens of minutes Then turn ON the HIGH VOLTAGE POWER SUPPLY switch again 4 Are all fans at the back operating Action Check if there is any object that blocks rotation of a fan If a fan does not rotate without any blocking the fan may be faulty It must be repaired HVA4321 4 49 4 4 Operation example in constant current constant voltage mode FF gt LL LAR When either of the above is not applicable the internal high voltage DC power supply may be faulty In this case 1t must be repaired 4 4 4 Signal output and adjustment a Using internal DC bias signal source Make sure that the internal DC signal source dial is 0 Set the polarity switch to the desired polarity Turn ON the internal DC bias signal source ON OFF switch and press ON of the SIGNAL switch While reading the value on the voltmeter or oscilloscope connected to the voltage monitor turn the dial gradually to the right Set it to the desired voltage Adjust it to the Set to 0 desired level DCHAS sia Select polarity S GNAL OFF Figure4 64 Using internal DC bias signal b Using external oscillator Connect the external oscillator to OSC INPUT and make sure that the oscillator output level is OV Set the GAIN knob to UP Turn ON the external oscillator ON OFF switch and press ON of the SIGNAL switch While reading the value on the voltmeter or oscilloscope connected to the voltage monitor increase the output l
27. eee ee ee an nn ann mann nenn nnnnn ann nnnnnn nenn 3 6 Operation of current limiter 1 a a aaao eaaa aaao 3 7 Response function in constant voltage mode 2 s cceeeeee ence ee ee ce ee eee eeeeeeeeeeeeeeeeeeee 3 8 Response function in constant current mode ccccccscceeceeeceeeeeeaeeeeesaeeaaesaeeeeeseneaees 3 8 Output rcr E PETS 3 9 Power supply and internal high voltage DC power unsuunsssnnannnnannnnnnnnnnnn anne nun 3 9 Return terminal m 3 10 Monitor output io eee LT ace eie E hich al te eee 3 11 cla CRI EIliDIL ect 3 11 Remote local settings 22 ccceeeeece eee cece cece e eee an ee ee ence nese ee ea nessa enhn nh nnn h nnn nr nnn n nnns eee 3 12 Remote control In put 1 oec ie e 3 12 Remote control input Circuit icv cecceecccciee naar nennen na ici sence 3 13 Remote control of HIGH VOLTAGE POWER SUPPLY ON OFF 3 14 Remote control of signal system ON OFF esee eene 3 14 Remote control of signal ON OFF eese nnne nnne nnn nnn nnn 3 15 Example of status contact output uunsensssennennnnnnnnnnnnnnnnnnnnnnnnunnnnnnnnnnnnnnn nnne nnn anne 3 16 Constant voltage mode total mode 4 444HH4nnn anne nn ee eee ee nnnnnn ann nnnnn ann nenn 4 1 Constant voltage mode load mode 44444uHn nnn nun nn nn anne nnnnnannn nun anne nenn 4 2 Internal high volt
28. ence ee eee eeee nese ee nn nh nn nnn nennen 4 24 Using external oscillator e roin en iaa 4 25 Using external DC bias signal ccccceeeeece eee ee cece ee eee seen ee ee ee ee ae nese ener enn nnn nennen 4 25 Eoad mode neget iia 4 28 Internal high voltage DC power OFF eusesesseeesseeesesnenn nennen nnne nenn nenn 4 29 Switch settings tai HEREDI ilii eere id 4 29 Output mode settings uii eli 4 30 L cal settingS 24 2 H 4 30 limiter settings ununi T da A A Ac 4 31 Current monitor mode settings 2 cceeeece cece eee ee ee cece ee ee nnnnnnnnnnnnn anne nnnnn ann nennen nenn 4 31 RESPONSE settings 2 eec iretur cen dened ke opaca Ds ahnen aaben Eaa anadas enced 4 32 Connection of external signal source Signal 2 cceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee 4 32 Connection of monitor usrensseeennnnneennnnnennnnnnnnnnnnnnenn nennen nnn nnn nn nnn nenne nn nnne nnn nnns 4 33 Connection of output cable 1 1 ecieieecccukese ee esva nn baa RR ann renee 4 33 Power supply as es eiecit a a A T cdas 4 35 Internal high voltage DC power ON sssssessesessieeereneennn nennen nnn nennen 4 36 Using internal DC bias Sigmal cccccescece cece ener ee ee eee anaa Ea ee ee eens aa apa nadaan 4 37 Using external oscillator 26
29. for input signal 5 9 5 6 2 Step response due to difference of amplitude 5 10 5 1 Measuring method LA 5 1 Measuring method B Measuring method of output voltage Measure the output voltage with the high voltage probe P6015A by Tektronix To measure frequency characteristics compensate the frequency characteristics of the high voltage probe using equalizing function of the frequency characteristic analyzer FRA5095 by NF Circuit Design Block Frequency characteristic analyzer 0 0 o O BODODO 000000 Signal output 10 Vms output Frequency range 1 Hz to 2 MHz High voltage probe After measurement store the measurement results in the EQL memory Figure5 1 Compensation of probe The measuring method of frequency characteristics for output voltage and voltage monitor is as shown in the figure below Connect load as required Take measurements with the load cable length of approx 15 cm for resistance load and with the load cable length of approx 5 cm for capacity load Frequency characteristic analyzer High voltage probe Voltage monitor Output voltage Figure5 2 Measuring method of output voltage HVA4321 5 1 5 1 Measuring method B Measuring method of output current The
30. heard the switch is locked in OFF status The internal high voltage DC power supply is always OFF Press the switch until a click From side sound is heard H GH VOLTAGE d POWER SUPP ON OFF B Locked status FEMALE IZ D Hi OA4 FEM Figure4 3 Internal high voltage DC power OFF b Signal system OFF Turn the internal DC bias knob to the leftmost position to minimize the value Turn OFF the switches of DC BIAS OSC INPUT and EXT DC BIAS INPUT Figure4 4 Switch settings HVA4321 4 3 4 1 Operation example in constant voltage mode c Output mode settings Set the output mode switch to CV In constant voltage mode the DC bias setting is invalid Figure4 5 Output mode settings d Remote local settings To operate this unit from the panel set the ON OFF CONTROL switch to LOCAL Refer to 4 6 Remote control operation for remote control operation OFF STATUS Figure4 6 Local settings HVA4321 4 4 4 1 Operation example in constant voltage mode LA e Output limiter settings To limit the output voltage and output current set the limiter level as required VOLTAGE kV DC CURRENT mA UMT I 10 II 10 5 MAX MAX Figure4 7 Limiter settings E Voltage limiter The voltage limiter function can limit the maximum value of the output voltage
31. internal high voltage power supply lights In several seconds the SIGNAL switch OFF lamp changes from blinking to lighting When the power is supplied the internal high voltage DC power supply is always OFF regardless of ON OFF status of the HIGH VOLTAGE POWER SUPPLY switch If this switch is ON turn OFF once and turn it ON again HVA4321 4 48 4 4 Operation example in constant current constant voltage mode H GH VOLTAGE Turn to the right for unlocking OVER SURAT ON LED lights Be sure to press the above switch to turn OFF the HV power for safety when the output wiring is changed Figure4 63 Internal high voltage DC power ON A WARNING After this operation the internal high voltage DC power supply is ON High voltage is generated inside the unit Be careful not to touch the area like an output terminal to which high voltage is applied OWhen the SIGNAL OFF switch remains blinking When the SIGNAL OFF switch remains blinking after unlocking the HIGH VOLTAGE POWER SUPPLY switch check the following 1 Is the shorting plug inserted into the HIGH VOLTAGE POWER SUPPLY ON OFF terminal at the back Action Insert the shorting plug for operation in LOCAL mode 2 Is the DC CURRENT value the minimum and is TRIP selected Action Increase the current limit or select LIMIT 3 Is temperature of exhaust air extremely high Action Temperature in the casing may be too high Leave the unit at a cool environment for
32. monitor 10 mApk output with short circuit GAIN dEl 0 0 i i E E 5 N Vr 0 6 il T 0 8 Zu RES E H i COC 100m 1 10 10k 100k Figure5 14 Frequency characteristics of current monitor HVA4321 5 8 5 6 Others OZ 5 6 Others 5 6 1 Delay of output signal for input signal B Delay of output signal for input signal 5 kVpk output with 16 pF capacity load Horizontal axis 2 Q div Vertical axis Input voltage 5 V div Output voltage 2 kV div Voltage monitor 2 V div Output current 500 75 div Current monitor 50 mV div Figure5 15 Delay of input output signal O Output signal rises later by approx 4 O than input signal HVA4321 5 9 5 6 Others CALLA 5 6 2 Step response due to difference of amplitude E Step response difference due to difference of amplitude Constant voltage mode without load Measure the voltage monitor TTTTTTTTTTTTTTTTTTTTTT ON ES T iau oa es Veo eile le aa ea a aa a al ra Horizontal axis 5 us div Vertical axis 2 V div Figure5 16 Step response in constant voltage mode Q The rising time up to 4 kVpk is constant regardless of the amplitude O The time over the value above is limited by slew rate HVA4321 5 10 6 Troubleshooting 6 1 When suspecting a fault LA 6 1 When suspecting a fault If you suspect a fault like operation against expectation or str
33. temperature of exhaust air extremely high Action Temperature in the casing may be too high Leave the unit at a cool environment for dozens of minutes Then turn ON the HIGH VOLTAGE POWER SUPPLY switch again 4 Are all fans at the back operating Action Check if there is any object that blocks rotation of a fan If a fan does not rotate without any blocking the fan may be faulty It must be repaired HVA4321 4 10 4 1 Operation example in constant voltage mode SSS aaa Sf When either of the above is not applicable the internal high voltage DC power supply may be faulty In this case it must be repaired 4 1 4 Signal output and adjustment a Using internal DC bias signal source Make sure that the internal DC signal source dial is 0 Set the polarity switch to the desired polarity Turn ON the internal DC bias signal source ON OFF switch and press ON of the SIGNAL switch While reading the value on the voltmeter or oscilloscope connected to the voltage monitor turn the dial gradually to the right Set it to the desired voltage Adjust it to the Set to 0 desired level Press ON ON Select polarity seca polarty C Tumon ON Ces ON GNAL rwr ae Figure4 15 Using internal DC bias signal b Using external oscillator Connect the external oscillator to OSC INPUT and make sure that the oscillator output level is OV Set the GAIN knob to TOP Turn ON the external oscillator ON OFF switch and press ON
34. the current protection circuit peak current may increase Increase the current limit setting When capacity load is connected in constant current mode ham occurs In the low frequency range the capacity load is a large impedance If it is a problem use the unit in load mode The ham may be decreased If any of the check items above is not applicable or corrective actions described do not improve status take measures to prevent supply of the power by attaching a paper to this unit indicating Not for use Then contact us or your sales agent you purchases HVA4321 T Maintenance 77 7 1 Daily maintenance a 7 1 7 2 Inspection CRA aa RR Rod GERA RA Ra Ru EROR OR 7 2 7 3 When the unit is not used for along time 7 2 7 4 Performance test n n II 7 3 7 4 1 Test of constant voltage mode re 7 3 7 4 2 Test of constant current mode ren 7 4 7 1 Daily maintenance LALLA 7 1 Daily maintenance A WARNING Be sure to perform maintenance while the power cable is removed from the outlet O If the panel or the case is dirty clean with a soft cloth If it is heavily dirty clean with a cloth soaked in neutral detergent and wring it tightly Cleaning with volatile solvent such as thinner and benzene or a chemical wipe may cause deterioration or peel of paint Never use it The intake cooling fan the fan in the left when viewed from the back at the back of the unit is provided
35. the leak current to stray capacitance tz 3 2 3 Sets the level of the internal REMOTE ugna signal operation voltage er Gee n E voltage mone tz 3 2 1 signal for the internal DC bias 3 3 2 3 2 2 tw 3 2 2 i ww 3 1 1 ut POWER 7 Power switch of this V f ON OFF unit gt 5 Indicates ON OFF status of tr 3 1 4 V unter RESPONSE _ the internal high voltage DC pte MEL rosea T bor GH VOLTAGE g iw 3 2 3 Wer 5 q POWER SUPPLY ES oOo OQ OQ PN I TRP o 10 s jj JA PUSH OFF NORMAL INVERT o A ON 3 GNAL Se acetal eee LJ on HIGH VOLTAGE OUTPUT ON OFF S hase for i t output SIE or ON OFF switch of the RVERT dS IO o PM m ON Oor Lae internal high voltage DC Inverted phase for input output power supply 3 2 3 3 1 3 ELOTE LAD EAE ZU SL a ap NORMAL EOA4 Y FEL THV BRE OF F LTI ESL ON OFF CURRENT MN O OUTPUT Hi CONTROL SELECT ALO b Output terminal for high ON OFF REMOTE LOAD SHAT 2 MIC OUTPUT H voltage ON when the signal from an 477 NS icu mm Free ESL g Connect the accompanying external oscillator is used LOCAL TOTAL ON special high voltage cable iw 3 1 3 f a O 3 2 3 GAIN S GNAL ON OFF STATUS MON TOR o Adjusts gain of the signal to OUTPUT VOLTAGE CURRENT As MN cas Output warning indicator SIGNAL INPUT a ER The indicator lights and rotates during iw 3 1 3 Qu 5 high voltage output m It lights in orange
36. voltage exceeds 4 9 kV the color changes from orange to red E Gain adjustment with RESPONSE The gain of 1 kHz band or more may vary depending on the RESPONSE knob position Refer to 5 2 Characteristics in constant voltage mode Chapter 5 When the frequency is used at 1 kHz or more measure the output voltage of the voltage monitor and adjust RESPONSE so that the desired amplitude may be obtained HVA4321 4 12 4 1 Operation example in constant voltage mode LILM z A WARNING It is very dangerous during output of high voltage Never touch the output cable or the high voltage area If you find a dangerous status due to a unit error or load error turn OFF the POWER switch immediately 4 1 5 Signal OFF a Input signal OFF To set the output signal to OV temporarily press OFF of the SIGNAL switch A WARNING When SIGNAL is OFF the output voltage is OV but the internal high voltage DC power supply is ON It continuously gives high voltage output In this status never touch the output cable or the high voltage area for safety b Internal high voltage DC power supply OFF When the HIGH VOLTAGE POWER SUPPLY switch is turned OFF the output of the internal high voltage DC power supply is 0V and the amplifier cannot give high voltage output HVA4321 4 13 4 2 Operation example in constant current mode total IL M
37. when the output TT La ON 1WAKV 1V10mA voltage is approx 4 9 kV or less and red be Zot 10k Q Zou 50 Q Zou 50 Q when the voltage is approx 4 9 kV or more SIGNAL INPUT The rotation speed changes depending BNC connector to give signal on the voltage level The higher the input from an external oscillator voltage is the faster the rotation is 7 3 1 3 E i tz 3 2 3 O Output Lo ON OFF CURRENT SELECT MONITOR CURRENT CV CC DC BIAS CV CC Return terminal for high voltage output of this unit ON when the external DC Selects current to the OUTPUT BNC connector for Sets the operation mode TOTAL bias is used Lo terminal connection output current monitor CV Constant voltage mode When this terminal is used total current of the amp 3 1 2 7 3 2 3 7 3 3 1 CC Constant current mode leak current to stray capacitance and the 3 5 Nomenclature 3 5 2 Rear panel O HIGH VOLTAGE POWER SUPPLY ON OFF Gives the ON OFF signal for control of the internal high i INT DC BIAS ON OFF O SIGNAL ON OFF ae DC power supply ON OFF with an external Gives ON OFF control signal of Gives ON OFF control signal input to the Use the accompanying shorting plug for short circuit the internal DC bias signal for amplifier for remote control operation when it is not controlled with an external signal remote control operation 3 3 2 G 3 3 2 7 3 3 2 En REMOTE CONTROL INPUT D VOLTAGE POWEI UPPLY ON OFF
38. with an air filter to remove dust in the intake air Clean the air filter regularly to prevent temperature rise in the unit due to clogging The air filter may be removed by unlocking the locks at the upper lower left and right sides of the fan cover at the back of the unit and by pulling out Figure7 1 How to remove fan cover HVA4321 7 1 7 2 Inspection LA For cleaning the air filter remove dirt completely with diluted neutral detergent After rinsing dry the filter completely and install it on the unit N CAUTION Clean the air filter regularly Clogging of the filter deteriorates cooling efficiency and may cause a failure 7 2 Inspection Power cable Check for broken shield or looseness or crack of the plug High voltage cable Check for broken shield or split or crack ofthe connector Be sure to use the accompanying high voltage cable for connection to the output terminal Front area Make sure that the HIGH VOLTAGE POWER SUPPLY switch can be locked A WARNING A cable with broken shield or disconnected wire may cause electric shock Do not use such cable 7 3 When the unit is not used for a long time Remove the power cable from the outlet and the unit Store the unit in a shelf or rack free from falling objects and dust If the unit may be covered with dust cover the unit with a cloth or a polyethylene cover Avoid storage at a place subject to extreme
39. 2 Operation example in constant current mode total 4 14 4 2 1 Panel setting o 3 3 3 3 N NON O 4 16 4 2 2 Connection of signal source and connection of load sccc o nn 4 19 4 2 3 Power supply and internal high voltage DC power supply uis as tole saya RR ARANA A RR RR SA N A 4 22 4 2 4 Signal output and adjustment re 4 24 4 2 5 Signal OFF nn 4 26 4 3 Operation example in constant current mode load gt 4 27 4 3 1 Panel setting Ao ap arn RI ea Pacey EA O ape NR RANA ap EU 4 29 4 3 2 Connection of signal source and connection of load rer s 4 32 4 3 3 Power supply and internal high voltage DC power supply E Re REN A 78 in atta 4 35 4 3 4 Signal output and adjustment rer 4 37 4 3 5 Signal OFF s a Bar 3 9 3 3 3 93 3 93 3 3 3 3 3 3 9 9 Ba 53 o3 o3 4 39 4 4 Operation example in constant current constant voltage modes m Mn 4 40 4 4 1 Panel setting AR AAA E a SE 4 42 4 4 2 Connection of signal source and connection Of loads ttt ee 4 45 4 4 3 Power supply and internal high voltage DC power supply seria are a arSualacm OR RR aca ce ears 4 48 4 44 Signal output and adjustment re 4 50 4 4 5 Signal OFF n 33 3 8 3 3 3 3 3 O3 o3 3 3 39 3 3 ON 3 o3 o3 o3 4 52 4 5 Change of load and power OFF nenn 4 53 4 5 1 Change of load n mmm nenn nn nun 4 53 4 5 2 Power supply OFF cect ttt ttre 4 56 4 6 Remote control i I III 4 57 4 6 1 Remote control Hr 4 57 4 6 2 Panel setting
40. Features CLL E Visual display of high voltage output During high voltage output the LED around the output connector lights and the revolution changes depending on the output voltage level B Remote control is capable Signals can be turned ON OFF with an external control signal HVA4321 1 2 1 2 Function description and block diagram LAE 1 2 Function description and block diagram 1 2 1 Function description Major functions of this unit are classified into the following Signal system Amplifier stage Detection system High voltage power supply External control system B Signal system The following three types of signals can be used as the signal sources Signal source built into the unit that gives the DC output DC BIAS Signal from external oscillator OSC INPUT Signal from external DC signal source EXT DC BIAS INPUT These signals can be used simultaneously Signal is internally added and the input is given to the amplifier stage B Amplifier stage Input signals are separated into positive and negative signals and each signal is transmitted to the high voltage amplifier stage through an optical fiber B Detection system Output voltage and output current are correctly detected by independently detecting and combining DC and AC components B High voltage power supply The unit is using 12 kV power supply to obtain the output of 10 kVpk This power supply can be individually turned ON OFF f
41. Ies Weatnecstdewtadahevins d eie T 4 26 HVA4321 v Contents 4 3 4 4 4 5 4 6 5 5 1 5 2 5 3 5 4 5 5 5 6 Operation example in constant current mode loadq 4 27 4 3 1 Panel setting eene nete ener tree peer uncle trea E eee eerte supr heran neueren 4 29 4 3 2 Connection of signal source and connection of load eueeseesess 4 32 4 3 3 Power supply and internal high voltage DC power supply 4 35 4 3 4 Signal output and adjustment esee nnne nennen 4 37 4 3 5 Signal OFE nuit lacio 4 39 Operation example in constant current constant voltage mode 4 40 4 4 1 Panel setting nin Ie IIS uique imul 4 42 4 4 2 Connection of signal source and connection of load usueeseuess 4 45 4 4 3 Power supply and internal high voltage DC power supply 4 48 4 4 4 Signal output and adjustMent oonconncconnnccnnconnnccnnnennncnnnnennncnnnnnnnnnrennernnnrrnnernnarennnrranees 4 50 4 4 5 SIGNAL OFF ee nieder ute e ec 4 52 Change of load and power OFF eese eene nnn nnn 4 53 4 5 1 Change of load a oia 4 53 4 5 2 Powersupply OFF 2 naea aaa apa ee aaa ada 4 56 Remote control ia Ile 4 57 4 6 1 Remote control cun id ia 4 57 4 6 2 Panel setting for use of remote CoONtrOl o
42. NG In constant current mode DC cannot be run for capacity load At this time the output for DC signal is the same as that in open status When SIGNAL is ON maximum 12 kV output is given to the OUTPUT Hi terminal Never apply DC to capacity load in constant current mode HVA4321 4 27 4 3 Operation example in constant current mode load Output terminal icd ess Internal capacity Wire capacity ee Current detection resistance for total Current monitor EE Current detection resistance Voltage monitor for load Figure4 34 Load mode lamp Output current of amplifier lint Leak current with internal capacity lout Output current Istr Leak current with wire capacity lload Load current lac Idc DC and AC of detected current Not all current lout from the output terminal is supplied to load There is leak of Istr with wire capacity Actual current to load is lload lout Istr In load mode lload and Istr are returned through different routes and only lload is detected to control output current Therefore Set current lload lout lload Istr CAUTION Current lout from the output terminal cannot exceed the maximum current of this unit In load mode load current is directly detected Only load current can be monitored with the current monitor HVA4321 4 28 4 3 Operation example in constant current mode l
43. OFF Internal DC bias signal ON OFF EXT DC BIAS ON OFF External DC bias signal ON OFF Figure3 17 Remote local settings Change REMOTE LOCAL when the signal is OFF If REMOTE LOCAL is changed with the signal ON the signal is forcibly turned OFF B REMOTE CONTROL INPUT It is the BNC connector to give ON OFF control signal input when ON OFF CONTROL is set to REMOTE REMOTE CONTROL I NPUT H GH VOLTAGE POWER SUPPLY ON OFF Figure3 18 Remote control input HVA4321 3 12 3 3 Monitor and control signal system The delay time from input of the SIGNAL ON OFF signal to actual ON OFF is approximately 5 us or less The delay time from input of other ON OFF signals to actual ON OFF is approximately 15 us or less The input circuit of the remote control terminal is as follows Figure3 19 Remote control input circuit B HIGH VOLTAGE POWER SUPPLY ON OFF HIGH VOLTAGE POWER SUPPLY ON OFF controls ON OFF of the internal DC high voltage power supply When the HIGH VOLTAGE POWER SUPPLY ON OFF switch on the front panel is ON and the HIGH VOLTAGE POWER SUPPLY ON OFF signal on the back panel is ON the internal high voltage DC power supply is ON Table3 1 Logic of HIGH VOLTAGE POWER SUPPLY ON OFF HIGH VOLTAGE POWER SUPPLY ON OFF signal in remote control operation Front panel switch OFF ON High Low High Low Back panel oe TE Approx 5 V Approx 0V Approx 5 V Approx 0 V signa Contact Status
44. S INPUT The input voltage of the OSC INPUT terminal and the EXT DC BIAS INPUT terminal is maximum 10V Signal generator O i DC standard power supply Figure4 10 Connection of external signal source signal HVA4321 4 6 4 1 Operation example in constant voltage mode LI b Monitor signal output Connect a measuring instrument such as oscilloscope or voltmeter to VOLTAGE MONITOR or CURRENT MONITOR as required S GNAL ON CFF STATUS OUTPUT MONTOR VOLTAGE CURRENT O Oscilloscope m Voltmeter oo Du 00 000 pn 00 Figure4 11 Connection of monitor c Connection of load Be sure to use the accompanying cable for the cable connected to Hi To minimize effect from stray capacitance shorten the cable length as much as possible and keep it away from the floor or other devices Connect the output return wire to TOTAL CURRENT terminal in total mode Connect it to LOAD CURRENT in load mode Tighten it securely Accompanying high 5 voltaqe cable gt 3 np
45. V and 6 kV Set the value with a flat tip screwdriver When MAX is set the limit is invalid The amplifier can give the maximum voltage output available In constant voltage mode In constant voltage mode the voltage of the internal high voltage DC power supply is limited and the amplitude of the input signal is limited to limit the output voltage Use the unit paying attention to the following The limit voltage for setting is only a guideline There is approx 0 to 100V error for the set value If the output voltage is not proportional to the input voltage due to load the value may be larger by about 1 kV than the set value Limited to 8 kV Limited to 6 kV Figure3 7 Operation of voltage limiter 1 Input voltage DM ia ay ee Limiter level Output voltage Exceeding limiter level Figure3 8 Operation of voltage limiter 2 HVA4321 3 6 3 2 Amplifier LIA In constant current mode In constant current mode the voltage of the internal high voltage DC power supply is limited to limit the output voltage Use the unit paying attention to the following Since the limit is made by current voltage there is approx 0 to 1 kV error for the set value B DC CURRENT mA The output current limit value is set The limit value is common for both positive and negative and the average current can be set in the rage from 0 mA to 10 mA For example the value is set to 3 mA the limit is 3 mA or 3
46. When the HIGH VOLTAGE POWER SUPPLY switch is turned OFF the output of the internal high voltage DC power supply is 0V and the amplifier cannot give high voltage output HVA4321 4 26 4 3 Operation example in constant current mode load Teer 4 3 Operation example in constant current mode load This section describes operation example of this unit in load mode of constant current mode In constant current mode the output current varies according to the input signal In load mode load current is correctly controlled ignoring effect due to leak current with cable capacity Effect of stray capacitance of the cable is found only for AC signal output Effect of stray signal is not found for DC signal Therefore use the unit in total mode for DC signal In load mode leak current with stray capacitance and load current are detected from different routes Therefore load mode cannot be used for load which is grounded A WARNING When the internal high voltage DC power supply is ON and SIGNAL is ON with the output open maximum 12 kV output is given to the OUTPUT Hi terminal It is very dangerous Do not turn ON SIGNAL when the output is open In constant current mode be sure to connect load or short circuit the output When the internal high voltage DC power supply is ON and SIGNAL is OFF with the output open 100V voltage output may be given to the OUTPUT Hi terminal depending on the voltage limiter settings A WARNI
47. a 2 aab Yos a NR r a aa Ya sa EUER a DRE ERR 3 6 3 273 JOUtDUL or E ERWIN a a EUER ARP ERE 3 9 3 3 Monitor and control signal system esee emen 3 11 KNEE Dll M 3 11 3 3 2 Control signal system arii id Anais cat aaa datetedeestaseccet 3 12 3 4 Power supply ems coccion nassen ne aaa ae ran 3 17 3 5 Panel drawing oncion en aa Ile bel 3 18 3 5 1 Front panel i d ce eco ed iade Cedo sve seca oA eade qud epa c cuve eA eee 3 18 3 5 2 CETERI 3 19 4 Operation method 4 1 Operation example in constant voltage mode eeeeseeeeeeeeess 4 1 AAA Panel setting aun edel eec oret e aaae alaaa 4 3 4 1 2 Connection of signal source and connection of load esee 4 6 4 1 3 Power supply and internal high voltage DC power supply 4 9 4 1 4 Signal output and adjustment eese ener nennen nennen nnn nnn 4 11 4 1 5 Signal OFF M iii 4 13 4 2 Operation example in constant current mode total e 4 14 4 2 1 Panel setting 22 ied 4 16 4 2 2 Connection of signal source and connection of load esuuseesess 4 19 4 2 3 Power supply and internal high voltage DC power supply 4 22 4 2 4 Signal output and adjustment eese enne ener nnne nnn 4 24 EA SA tu ei
48. age DC power OFF z24444444444Rn cece eee ee nese anne nnnnnannn anne nun nenn nenn 4 3 Switch settings iii ia 4 3 Output mode settings 1 urn ee ata cael eod epo aoa aoa sa ta ados a ma 4 4 Local sSettihgS isara 4 4 Limiter Settings 4d a da ata 4 5 Current monitor mode settings ooocooncconnccccncoonncnonnnennnnonnnennnnnnnnnnnnrrnnernnnnrnnnrrnnarennnrnnnes 4 5 hCLPPBELXIAuhabtemmece 4 6 Connection of external signal source Signal ceceeeeeeeeeeeeeeee eee eeeeeeeeeeeeeeeeneeees 4 6 viii Figure4 11 Figure4 12 Figure4 13 Figure4 14 Figure4 15 Figure4 16 Figure4 17 Figure4 18 Figure4 19 Figure4 20 Figure4 21 Figure4 22 Figure4 23 Figure4 24 Figure4 25 Figure4 26 Figure4 27 Figure4 28 Figure4 29 Figure4 30 Figure4 31 Figure4 32 Figure4 33 Figure4 34 Figure4 35 Figure4 36 Figure4 37 Figure4 38 Figure4 39 Figure4 40 Figure4 41 Figure4 42 Figure4 43 Figure4 44 Figure4 45 Figure4 46 Figure4 47 Figure4 48 Figure4 49 Figure4 50 Figure4 51 Figure4 52 Figure4 53 HVA4321 Figures Connection of MONitOF cece eee ee renee eee nese eee aA a aana nn nni nnn nnne nnne nennen 4 7 Connection of output cable ici diia dea icr ah eda cer dt 4 7 Power supply 21 3 uin ee teeta Sed ios 4 9 Internal high voltage DC power ON
49. age constant current amplifier The unit can be used as a constant voltage amplifier or a constant current amplifier The unit can also be set as a constant voltage amplifier for DC signal and a constant current amplifier for AC signal B Built in DC signal source The unit has a built in DC bias signal source B With external signal input terminals The unit can be connected to the external signal source for two systems B Excellent characteristics with large amplitude In constant voltage mode 10 kVpk output up to 7 kHz is available In constant current mode 10 kVpk output up to 4 kHz is available with resistance load for both modes B With output limiter function Output voltage limiter and output current limiter functions are available B High slew rate In the constant voltage amplifier the slew rate of 500 V Q is achieved B Two types of current mode In the constant current amplifier two types of modes are available the total mode that gives the set current output from the amplifier and the load mode that gives correct current set to the load by compensating the current leaking from stray capacitance of a wire along the path WB Step response waveform adjusting function For a step signal fine adjustment of the response waveform can be made B Correct monitor output Output voltage and output current can be correctly monitored Voltage monitor gain 1 1000 Current monitor gain 1 V 10 mA HVA4321 1 1 1 1
50. alue Turn OFF the switches of DC BIAS OSC INPUT and EXT DC BIAS INPUT Figure4 53 Switch settings HVA4321 4 42 4 4 Operation example in constant current constant voltage mode c Output mode settings Set the output mode switch to CC Set the DC BIAS to CV Figure4 54 Output mode settings d Remote local settings To operate this unit from the panel set the ON OFF CONTROL switch to LOCAL Refer to 4 6 Remote control operation for remote control operation EXT DC BAS 3 CFF STATUS OUTPUT 10V MAX An 10k Q Figure4 55 Local settings HVA4321 4 43 4 4 Operation example in constant current constant voltage mode ee e Output limiter settings To limit the output voltage and output current set the limiter level as required U MTER VOLTAGEKY DC CURRENT mA UMT 7 N 10 WW 10 5 e MAX 5 MAX Figure4 56 Limiter settings E Voltage limiter The voltage limiter function can limit the maximum value of the output voltage independently for positive and negative values in the range from 5 kV to 10 kV For example the output is sufficient up to 8 kV set the VOLTAGE LIMITER to 8 kV and 8 kV When voltage limitation is not required set it to MAX B Current limiter The current limiter function can limit the average value of the output current in the range from 0 mA to 10
51. ange operation refer to the check list below Check for handling operation method and connection Before check turn OFF the power switch B When the power is supplied Problem Cause Action Power is not ON Is the power supplied Make sure that the power is correctly supplied Is the fuse blown E When the internal high voltage DC power supply is ON Problem SIGNAL OFF remains blinking Is the shorting plug at the back inserted Replace the fuse Action Insert the shorting plug Is the current limiter set to the minimum or TRIP Increase the limiter set value or change TRIP to LIMIT When the installation space for this unit has high temperature or when the unit is used at a high output for a long time the temperature sensor in this unit may activate a protection mode Lower the temperature of the installation area or leave the unit at a cool place for cooling If the cooling fan stops for some reason the unit automatically goes to protection mode for safety If the cooling fan stops stop operation immediately and contact us When the HIGH VOLTAGE POWER SUPPLY switch is OFF the HVPS ON LED lights HVA4321 The internal high voltage DC power supply may be faulty 6 1 Stop operation immediately and contact us 6 1 When suspecting a fault LA B When SIGNAL is OFF Problem Cause Action The output warning lamp l
52. as detailed as possible about the nature of the problem conditions of use etc NF Corporation is committed to providing repair services as quickly as possible Note however that in the case of products that have been purchased 5 or more years before several days may be needed in order to procure the needed repair parts Also note that if repair parts are no longer manufactured or in the case of remarkable damage or modification of the product NF Corporation reserves the right to refuse repair IMPORTANT 1 Reproduction of this instruction manual either in part or in whole is strictly prohibited The contents of this instruction manual are subject to change without notice Although great care has been taken to ensure the accuracy and completeness of the information contained in this user s manual please notify NF Corporation or an NF Corporation sales representative in case any unclear points errors or omissions are found NF Corporation shall not be held responsible for consequential damages arising from the use of this product HVA4321 Instruction Manual NF Corporation 6 3 20 Tsunashima Higashi Kohoku ku Yokohama 223 8508 Japan TEL 81 45 545 8111 http www nfcorp co jp Copyright 2005 NF Corporation http www nfcorp co jp NF Corporation 6 3 20 Tsunashima higashi Kohoku ku Yokohama 223 8508 JAPAN
53. ase the current limit or select LIMIT 3 Is temperature of exhaust air extremely high Action Temperature in the casing may be too high Leave the unit at a cool environment for dozens of minutes Then turn ON the HIGH VOLTAGE POWER SUPPLY switch again 4 Are all fans at the back operating Action Check if there is any object that blocks rotation of a fan If a fan does not rotate without any blocking the fan may be faulty It must be repaired HVA4321 4 36 4 3 Operation example in constant current mode load LA When either of the above is not applicable the internal high voltage DC power supply may be faulty In this case it must be repaired 4 3 4 Signal output and adjustment a Using internal DC bias signal source Make sure that the internal DC signal source dial is 0 Set the polarity switch to the desired polarity Turn ON the internal DC bias signal source ON OFF switch and press ON of the SIGNAL switch While reading the value on the voltmeter or oscilloscope connected to the voltage monitor turn the dial gradually to the right Set it to the desired voltage Adjust it to the desired level Select polarity S GNAL ON Bats Figure4 47 Using internal DC bias signal b Using external oscillator Connect the external oscillator to OSC INPUT and make sure that the oscillator output level is OV Set the GAIN knob to UP Turn ON the external oscillator ON OFF switch and press ON
54. ay fall Failure may occur Outdoor or place where the product is exposed to direct sunlight or place near fire or heat Performance may not be satisfied or failure may occur Place near electromagnetic field source high voltage device power line radio transmitter cell phone etc Unintended high voltage output may be given or noise may enter Place where frequent vibration occurs Malfunction or failure may occur B installation Make sure that four legs at the bottom are on a flat place such as a desk Never place the unit vertically with the back facing down horizontally with the side facing down or up side down with the top facing down Do not put an object on the unit A WARNING Do not use a radio transmitter or a cell phone around this unit Unintended high voltage output may be given due to radio HVA4321 2 2 2 3 Grounding and power supply connection LIA 2 3 Grounding and power supply connection The power supply requirements for this product are as follows Power supply voltage range Single phase AC100V 10 Frequency range 50 60 Hz 2 Hz Power consumption 800VA or less a Check items before connection of the power cable Make sure that the power switch on the front panel is OFF Make sure that this is OFF Figure2 1 Check of power OFF Make sure that the HIGH VOLTAGE POWER SUPPLY switch on the front pane
55. cable connected to Hi To minimize effect from stray capacitance shorten the cable length as much as possible and keep it away from the floor or other devices Connect the return wire to the TOTAL CURRENT terminal Tighten it securely Accompanying high 5 C voltage cable NA cma a Accompanying return cable Figure4 28 Connection of output cable HVA4321 4 20 4 2 Operation example in constant current mode total ES A lt A lt A __ ZZ N CAUTION In total mode be sure to use the TOTAL CURRENT terminal If the LOAD CURRENT terminal is used the operation may be faulty The TOTAL CURRENT terminal is connected to the casing A WARNING Tighten the binding post terminal of OUTPUT Lo securely If it is loose electric shock may occur when touching the load grounding or the return cable Check sometimes if it is not loose when it is safe with the power OFF HVA4321 4 21 4 2 Operation example in constant current mode total LII 4 2 3 Power supply and internal high voltage DC power supply a Power supply Before supply of power check again if the HIGH VOLTAGE POWER SUPPLY switch is OFF button is pressed After checking connection to load connection to the signal source and if the panel settings are correct turn ON the POWER switch of the unit When the power is ON the fan at the back starts operation
56. connection of load a Connection of input signal source Give the signal generator e g oscillator output to OSC INPUT When applying the external DC bias give the DC signal source output to EXT DC BIAS INPUT The input voltage of the OSC INPUT terminal and the EXT DC BIAS INPUT terminal is maximum 10V Signal generator CI Figure4 42 Connection of external signal source signal HVA4321 4 32 4 3 Operation example in constant current mode load LAE b Monitor signal output Connect a measuring instrument such as oscilloscope or voltmeter to VOLTAGE MONITOR or CURRENT MONITOR as required Oscilloscope Voltmeter 00 T Uu 00 O 00 mn ng ooo I Figure4 43 Connection of monitor c Connection of load Be sure to use the accompanying cable for the cable connected to Hi To minimize effect from stray capacitance shorten the cable length as much as possible and keep it away from the floor or other devices Connect the return wire from load to the LOAD CURRENT terminal Connect the ground line where leak
57. contact output When SIGNAL is OFF it is connected to the COM terminal When SIGNAL is ON it is connected to the COM terminal Terminal for fixing Do not use it No 2 terminal can be used as a relay terminal S GNAL ON OFF STATS To AC100V Figure3 23 Example of status contact output HVA4321 3 16 3 4 Power supply items LAE 3 4 Power supply items B POWER It is the power switch of the unit B LINE It is connected to single phase AC100V Be sure to connect it to the outlet with ground with an accompanying 3 pin power cable m It is terminal for grounding of casing If grounding is not available with a power cable ground this 4 E 2 terminal with a wire of 2 mm or more A WARNING Be sure to ground this unit for safety Otherwise a serious accident such as electric shock may occur B FUSE Use a 10A 250V fuse with time lag N WARNING When a fuse is replaced be sure to disconnect the power cable from the outlet Replace it with the same standard one For this product the time lag type fuse with the rating of 10A 250V and 2 x 20 mm is used HVA4321 3 17 3 5 Nomenclature 3 5 1 Front panel Page number of detailed explanation is shown after Qe ON OFF uz 3 1 1 ON when the internal DC bias signal is used G SIGNAL ON OFF Sets polarity of the internal DC bias signal source 3 1 1 DC bias knob
58. cur N CAUTION The standard power cable accompanied has rated voltage of AC125V and rated current of 10A When a power cable not accompanied is used be careful for the rated voltage and current A WARNING When a fuse is replaced be sure to disconnect the power cable from the outlet Replace it with the same standard one For this product the time lag type fuse with the rating of 10A 250V and 2 x 20 mm is used HVA4321 2 5 3 Nomenclature and functions Lj 3 1 Signal system NAS ESSE AA ANA OR N 3 1 3 1 1 Internal DC bias signal sources nn nz 3 1 3 1 2 External bias signal input rer nn n n 6n 3 1 3 1 3 External signal input 3B 83 5 8 B 3 3 B 3 3 3 3 3 3 5 3 9 35 3 2 3 1 4 Input signal ON OFF m 3 NsON BON BOB BON NON XN 3B N 8ON 3 3 o 3 2 3 2 Amplifier m NOB BON BOR BON SON 3 3 SON BON MON 3 3 HON NON 3 3 3 NN NON 3 3 3 3 3 4 3 2 4 Amplifier operation mode ccccocc n n0 6 666m 3 4 3 2 2 Amplifier control mo 3 8 N BOR BOR 35 BON BOR 3 9 NB WS 3 3 NON N 3 353 3 6 3 2 3 Output ary RAS Shae IR a eee BE wa hem E OR UE CR 3 9 3 3 Monitor and control signal system ren 3 11 3 3 1 Monitor TETERA 3 11 3 3 2 Control signal system cccct tcc sss esters 3 12 3 4 Power supply items 28 B3 3 3 8 358383 9353535333335 3 17 3 5 Panel drawing mo 03 8 B o OR 3 3 ON OB BOR 3 3 s B BO R 3 s 3 NOB M3 3 3 3 3 18 3 5 1 Front panel m 3 8
59. d E Gain adjustment with RESPONSE The gain in the AC range may vary depending on the RESPONSE knob position Refer to 5 4 Characteristics of constant current constant voltage mode Chapter 5 When the frequency is used at specific frequency measure the output voltage of the voltage monitor and adjust RESPONSE so that the desired amplitude may be obtained HVA4321 4 51 4 4 Operation example in constant current constant voltage mode LT SSS A A WARNING It is very dangerous during output of high voltage Never touch the output cable or the high voltage area If you find a dangerous status due to a unit error or load error turn OFF the power switch immediately 4 4 5 Signal OFF a Input signal OFF To set the output signal to OV temporarily press OFF of the SIGNAL switch A WARNING When SIGNAL is OFF the output voltage is OV but the internal high voltage DC power supply is ON It continuously gives high voltage output In this status never touch the output cable or the high voltage area for safety b Internal high voltage DC power supply OFF When the HIGH VOLTAGE POWER SUPPLY switch is turned OFF the output of the internal high voltage DC power supply is 0V and the amplifier cannot give high voltage output HVA4321 4 52 4 5 Change of load and power OFF 4 5 Change of load and power OFF 4 5 1 Change of load a Input signal OFF To set the output signal to 0V temporarily press OFF of the SIGNAL switch
60. d keep it away from the floor or other devices Connect the return wire to TOTAL CURRENT terminal and LOAD CURRENT terminal according to the total load mode settings Tighten it securely Accompanying high voltage cable Accompanying return cable Figure4 61 Connection of output cable N WARNING Tighten the binding post terminal of OUTPUT Lo securely If it is loose electric shock may occur when touching the load grounding or the return cable Check sometimes if it is not loose when it is safe with the power OFF HVA4321 4 47 4 4 Operation example in constant current constant voltage mode LOCAL 4 4 3 Power supply and internal high voltage DC power supply a Power supply Before supply of power check again if the HIGH VOLTAGE POWER SUPPLY switch is OFF button is pressed After checking connection to load connection to the signal source and if the panel settings are correct turn ON the POWER switch of the unit When the power is ON the fan at the back starts operation On the panel surface The OFF lamp of the signal switch blinks The OFF LED of the internal high voltage DC power supply lights Figure4 62 Power supply b Supply of high voltage DC power Turn the HIGH VOLTAGE POWER SUPPLY switch to the right and unlock it Turn ON the internal high voltage power supply The ON LED of the
61. de For example if a capacity load is connected in constant current mode the capacity load has infinite impedance for DC DC cannot be applied in constant current To apply DC to a capacity load set this switch to CV so that DC output may be given in constant voltage mode Then constant DC bias can be applied to the capacity load In constant voltage mode this function is invalid for either setting Figure3 5 Operation mode switch HVA4321 3 4 3 2 Amplifier LIA The frequency at the boundary of constant voltage mode and constant current mode may vary depending on the load type and value For resistance load For 250kQ Approx 5 mHz or more ForIMQ Approx 0 2 Hz or more For capacity load For 16 pF Approx 100 Hz or more For 100 pF Approx 50 Hz or more For 1000 pF Approx 5 Hz or more B OVERLOAD It is the LED that lights if the unit amplifier has a fault It lights if the unit is overloaded or the limiter is activated HVA4321 3 5 3 2 Amplifier LIA 3 2 2 Amplifier control U MTER VOLTAGE KV DC CURRENT mA U MT e A ote 2 10 e e 10 s p 5 MAX g MAX TRP o io Figure3 6 Limiter and response B VOLTAGE kV The limit value of the output voltage can be set in the range from 5 kV to 10 kV at the resolution of 1 kV For example when the limit values of 8 kV for positive side and 6 kV for negative side are satisfactory make settings to 8 k
62. e m T 10kV AC DC AMPLIFIER HVA4321 INSTRUCTION MANUAL NF Corporation DA00012063 001 10kV AC DC AMPLIFIER HVA4321 Instruction Manual This unit generates high voltage Incorrect operation may result in death or injury To prevent death or injury please read this manual carefully Keep this manual near the unit so that operators may read at any time Preface Thank you for purchasing the 10 kV AC DC amplifier To ensure safe and proper use of this electric equipment please read first INSTRUCTIONS FOR SAFE USE on the following pages B Caution Symbols Used in This Manual The following caution symbols are used in this manual Be sure to observe these caution symbols and their contents to ensure the safety of the user and avoid damage to the equipment AN WARNING This mark indicates information for the avoidance of a hazard such as electric shock that may endanger human life or cause injury during handling of the equipment N CAUTION This mark indicates information for the avoidance of damage to the equipment during handling This manual has the following chapter organization If reading this manual for the first time start from Chapter 1 1 2 OVERVIEW Describes various items that must be checked prior to using this product PREPARATIONS BEFORE USE Describes various cautions regarding preparations to be made before installation or operation PART NAMES AND FUNCTIONS
63. e CC RESPONSE knob to the rightmost position RESPONSE amp Turn to the rightmost Figure4 25 Response settings 4 2 2 Connection of signal source and connection of load a Connection of input signal source Give the signal generator e g oscillator output to OSC INPUT When applying the external DC bias give the DC signal source output to EXT DC BIAS INPUT The input voltage of the OSC INPUT terminal and the EXT DC BIAS INPUT terminal is maximum 10V Signal generator amp 00 CI CJ DC standard power supply sl Figure4 26 Connection of external signal source signal HVA4321 4 19 4 2 Operation example in constant current mode total b Monitor signal output Connect a measuring instrument such as oscilloscope or voltmeter to VOLTAGE MONITOR or CURRENT MONITOR as required TOTAL S GNAL ON OFF STATUS MONTOR OUTPUT VOLTAGE CURRENT 7 A Oscilloscope m Voltmeter 00 00 00 Coe O e 00 pp nu O 000 Figure4 27 Connection of monitor c Connection of load Be sure to use the accompanying cable for the
64. eBe3joA uBiH MELE 9039 30 o 2 svia oa Snivis JJO NO TWNOIS JJO NO vu Nena Od 6 OCIAOT gt 9 UJEJDEID YOO G LCSVVAH Ya 1noJro Jojjuo2 i 6 o 330 NO f L L I4 JALNA m rer prom vue CEP sono wes Ol DIO LES 6 a i oh o Lu wes eip 19019 ZZL I 2 Preparations before use j 2 1 Before using the HVA4321 5sssssssssssssssssssssss 2 1 2 2 Installation RR On 33 OR ON 4 3 3 3 3 3 33 3 3 3 3 39 3 3 3 3 3 ON 5o O3 o3 c 2 2 2 3 Grounding and power supply connection 2 3 2 1 Before using the HVA4321 LA 2 1 Before using the HVA4321 B Safety check Before using the HVA4321 read the following items in the instruction manual INSTRUCTIONS FOR SAFE USE Described at the beginning of this instruction manual 2 3 Grounding and connection of power supply E Appearance and accessories check Removal of product Remove the product out of the box If unusual statues damage or dent are observed on the cardboard box make sure that the product is not adversely affected Check of appearance Make sure that there is no damage or dent on the panel surface knob or connector Check of accessories Accessories of this product are as shown below Make sure that the quantity is sufficient or that there is no faulty part Table2 1 Accessories Instruction manual HVA4321 instruction manual Power cable 10A 125V 2 m 3 poles Fuse time lag 10 A 250V 2 x 20 mm
65. er Irene cones aaa a aai aei aeaiiai 4 38 Using external DC bias signal ueeesseessesssessesseesles nese ee enhn nennen nnn 4 38 Constant current constant voltage mode total mode suus 4 41 Constant current constant voltage mode load mode 4 41 Internal high voltage DC power OFF sssessseesseesseseeeen eren nne nnn 4 42 iC A ERE DET IMECIEIIIIE m 4 42 ix Figures Figure4 54 Figure4 55 Figure4 56 Figure4 57 Figure4 58 Figure4 59 Figure4 60 Figure4 61 Figure4 62 Figure4 63 Figure4 64 Figure4 65 Figure4 66 Figure4 67 Figure4 68 Figure4 69 Figure4 70 Figure4 71 Figure4 72 Figure4 73 Figure5 1 Figure5 2 Figure5 3 Figure5 4 Figure5 5 Figure5 6 Figure5 7 Figure5 8 Figure5 9 Figure5 10 Figure5 11 Figure5 12 Figure5 13 Figure5 14 Figure5 15 Figure5 16 Figure7 1 Figure7 2 Figure7 3 Figure8 1 Figure8 2 HVA4321 Outputimode settings iii nn ie eee eden eed ee de dae rcd ende tee 4 43 Local settings cete ic 4 43 Limiter settings 1n dis 4 44 Current monitor mode settings ccceecece cece ee ee ee ann Hanne man nn ann nennen enn nnn ener 4 44 Response Settings imita late 4 45 Connection of external signal source Signal 2 ceeeeeeeeeeeeee eens eee eee eeeeeeeeeeeeeeeee 4 45
66. evel of the oscillator gradually If fine adjustment of the output level is required adjust it at the oscillator or adjust it with GAIN of the unit Turn GAIN to the left the gain is decreased Turn GAIN to the right the gain is increased The gain can be adjusted in the range of approximately 3 HVA4321 4 50 4 4 Operation example in constant current constant voltage mode Adjust it to the Set to 0 desired level S8 GNAL Select polarity NORMAL GAN ON eL A Set to TOP Oscillator Figure4 65 Using external oscillator c Using external DC bias signal source Connect the DC standard power supply to EXT DC BIAS INPUT and make sure that the output of the standard power supply is OV Turn ON the external DC bias ON OFF switch and press ON of the SIGNAL switch While reading the value on the voltmeter or oscilloscope connected to the voltage monitor increase the output level of the DC standard power supply gradually and set the desired voltage Adjust it to the desired level Scu ON D El DC standard power Figure4 66 Using external DC bias signal B High voltage display When the output voltage exceeds 130V to 150V the high voltage output LED lights and starts rotation slowly The higher the output voltage is the faster the rotation is When the voltage exceeds 4 9 kV the color changes from orange to re
67. f purchase against defects in material and workmanship This warranty entitles you to free repair of the product covered under it as long as you contact either NF Corporation or an NF Corporation sales representative about the problem while the warranty is still valid This warranty is valid only in Japan If planning to use it outside Japan consult NF Corporation or an NF Corporation sales representative In the following cases repair will be charged even if the warranty is still valid e Failure caused by handling or storage that goes against the usage methods and or cautions described in the instruction manual of the product e Failure or damage caused by dropping of the product or exposure to shocks by the customer during transportation e Modification of the product by the customer e Failure caused by abnormal voltage from external or failure caused by external equipment connected to the product e Failure or damage caused by natural disaster such as fire earthquake flood lightning explosion or war e Replacement of consumables such as magnetic and tape and battery ABOUT REPAIR If a problem occurs and it is judged to be a failure of the product or if you have questions contact NF Corporation or an NF Corporation sales representative When contacting NF Corporation or an NF Corporation sales representative provide the model name or product name the manufacturing number serial number shown on the name plate and information
68. for capacity load At this time the output for DC signal is the same as that in open status When SIGNAL is ON maximum 12 kV output is given to the OUTPUT Hi terminal Never apply DC to capacity load in constant current mode HVA4321 4 14 4 2 Operation example in constant current mode total Output terminal lou SZ OUIPUT H toa Internal capacity Wire capacity ms Current detection resistance for total OUIPUT Lo gt On Current monitor 7 Idc lac 9 LOAD Current detection resistance Voltage monitor for load Figure4 18 Total mode lamp Output current of amplifier lint Leak current with internal capacity lout Output current Istr Leak current with wire capacity lload Load current lac Idc DC and AC of detected current Not all current lout from the output terminal is supplied to load There is leak of Istr with wire capacity Actual current to load is lload lout Istr In total mode control is made to satisfy set current lout lload Istr In total mode from output current lout DC is detected with current detection resistance and AC is detected with current transformer CT Total output of leak current Istr with wire capacity and load current lload is given to the current monitor Leak current lint AC with stray capacity in the amplifier runs through the current detection resistance but on
69. for use of remote control 4 58 4 1 Operation example in constant voltage mode LAE 4 1 Operation example in constant voltage mode This section describes operation example for use of this unit in constant voltage mode In constant voltage mode the output voltage changes according to the input signal Output terminal lout Q VASA OUIPUT H ml Internal capacity Wire capacity Load resistance Current detection resistance OUIPUT Lo for total 29 TOTAL Current monitor sl Idc 5 lac O LOAD Voltage monitor Current detection resistance for load Figure4 1 Constant voltage mode total mode lamp Output current of high voltage amplifier lint Leak current with internal capacity lout Output current Istr Leak current with wire capacity lload Load current lac Idc DC and AC of detected current In total mode from output current lout DC is detected with current detection resistance and AC is detected with current transformer CT Total output of leak current Istr with wire capacity and load current lload is given to the current monitor Leak current lint AC with stray capacity in the amplifier runs through the current detection resistance but only DC is detected here The monitor is hardly affected A CAUTION Effect of stray capacitance of the cable is found only for AC signal output Effect of stray sig
70. ge parts Absolutely never remove its cover Even when the inside of this product needs to be inspected do not touch the inside All such inspections are to be performed by service technicians designated by NF Corporation Do not modify this product Absolutely never modify this product as this may cause new hazards and may disqualify this product from repair in case of failure O Safety related symbols The general definitions of the safety related symbols used on this product and in the instruction manual are provided below A Instruction manual reference symbol This symbol is displayed to alert the user to potential danger and refer him her to the instruction manual AN Electric shock danger symbol This symbol indicates locations that present a risk of electric shock under specific conditions D x Protective terminal grounding symbol This symbol indicates terminals that require grounding to prevent electric shock Before operation of the unit be sure to connect this terminal to the ground of type 3 or higher When the 3 pin power cable is connected to the 3 pin outlet it is not necessary to connect this ground terminal Warning Symbol A WARNING This symbol indicates information for avoiding danger to human life or bodily injury such as electric shock while handling this product N CAUTION Caution Symbol This symbol indicates information for preventing damage to the product when handling it O Other symbols This symbo
71. h Internal high voltage power supply Not ON Figure3 13 Power supply and internal high voltage DC power HVA4321 3 9 3 2 Amplifier LIA B ON OFF Indicates the output status of the internal high voltage DC power supply When the high voltage DC power supply gives high voltage output the ON LED lights B OUTPUTHI It is the high voltage output terminal of the unit Connect the accompanying special cable for use E Output display warning lamp When high voltage output is given the LED around OUTPUT HI rotates and lights The color is yellow up to about 4 9 kV and red over this value The rotation speed varies depending on the output voltage level The higher the voltage is the faster the rotation speed is B OUTPUT Lo TOTAL CURRENT It is the return terminal of the high voltage output used in constant voltage mode or constant current total mode E OUTPUT Lo LOAD CURRENT It is the return terminal of the high voltage output used in constant current load mode B CURRENT SELECT Total load mode is set When the unit is used in total mode set it to TOTAL When it is used in load mode set it to LOAD For details refer to 4 2 Operation example in constant current mode total and 4 3 Operation example in constant current mode load OUTPUT Lo MON TOR LOAD TOTAL VOLTAGE CURRENT CURRENT CURRENT O O AV AKV 1M 10mA Zou 50 Q Zou 50 Q Figure3 14 Return terminal HVA4321 3 10
72. h 1 M Q load HVA4321 5 6 5 4 Characteristics in constant current and constant voltage mode 5 4 Characteristics in constant current and constant voltage mode 5 4 1 Frequency characteristics B Frequency characteristics of output current for input voltage in constant current TOTAL constant voltage mode with capacity load KE GAIN dB pe las IE BS FPS NK 10 i 15 A 5 A pt 1 10 100 1k FREQUENCY Hz Figure5 11 Frequency characteristics in constant current TOTAL constant voltage mode B Frequency characteristics of output current for input voltage in constant current LOAD constant voltage mode with capacity load GAIN FB E HHH Figure5 12 Frequency characteristics in constant current LOAD constant voltage mode HVA4321 5 7 5 5 Characteristics of voltage monitor and current monitor 5 5 Characteristics of voltage monitor and current monitor 5 5 1 Frequency characteristics B Frequency characteristics of voltage monitor 10 kVpk output without load GAIN dB 3 6 T a 1 60 0 L 50 2 60 4 H Esto 4 60 6 4 E A dz 1 10 100 FFEBLENCY Hz Figure5 13 Frequency characteristics of voltage monitor B Frequency characteristics of current
73. h voltage DC power Turn the HIGH VOLTAGE POWER SUPPLY switch to the right and unlock it Turn ON the internal high voltage power supply The ON LED of the internal high voltage power supply lights In several seconds the SIGNAL switch OFF lamp changes from blinking to lighting When the power is supplied the internal high voltage DC power supply is always OFF regardless of ON OFF status of the HIGH VOLTAGE POWER SUPPLY switch If this switch is ON turn OFF once and turn it ON again HVA4321 4 9 4 1 Operation example in constant voltage mode Turn to the right for unlocking H GH VOLTAGE POWER SUPPLY ON LED lights Be sure to press the above switch to turn OFF the HV power for safety when the output wiring is changed Figure4 14 Internal high voltage DC power ON A WARNING After this operation the internal high voltage DC power supply is ON High voltage is generated inside the unit Be careful not to touch the area like an output terminal to which high voltage is applied OWhen the SIGNAL OFF switch remains blinking When the SIGNAL OFF switch remains blinking after unlocking the HIGH VOLTAGE POWER SUPPLY switch check the following 1 Is the shorting plug inserted into the HIGH VOLTAGE POWER SUPPLY ON OFF terminal at the back Action Insert the shorting plug for operation in LOCAL mode 2 Is the DC CURRENT value the minimum and is TRIP selected Action Increase the current limit or select LIMIT 3 Is
74. haracteristics DC Up to 4 kHz Frequency range allowed for 10 kmApk output Measured with a high voltage probe Model P6015A by Tektronix with rated resistance load with load connection cable of 10 cm or less and with the RESPONSE dial turned rightmost Minor amplitude characteristics DC Up to 10 kHz 3 dB short circuit for 10 mApk output B Slew rate 1 mA us or more E Output residual noise 500 uA rms or less Measured with the RMS value AC voltmeter M 170 by NF Corporation bandwidth of 20 MHz or its equivalent E Output offset current 50 uA B DC superimposing function By setting the DC BIAS the DC component may be operated in constant current mode or in constant voltage mode B Remote sensing function of return current With the remote sensing function leak current can be ignored and the load current is correctly ignored However the maximum average current is up to 10 mA HVA4321 8 4 8 3 Output area 8 3 Output area E High voltage output Hi terminal OUTPUT Hi Special high voltage jack Front panel A400B series by ALDEN E High voltage output Lo terminal OUTPUT Lo Binding post Front panel Both for total current terminal and load current terminal 8 4 Monitor output E Output voltage monitor Gain 1 1000 fold DC gain accuracy 0 2 of full scale Output offset voltage 20 mV Output residual noise 2 mVrms or less Measured with the RMS AC voltmeter M 170 by NF Corporation bandwidth of
75. hod Contact C M3 screw 4P terminal table back panel B ON OFF status signal output SIGNAL ON OFF STATUS OUTPUT Function Signal to indicate the ON OFF status of the signal Output TTL level Lo OFF Hi ON Output method BNC Front panel HVA4321 8 6 8 6 Protection circuit LAE 8 6 Protection circuit E Limit of output voltage VOLTAGE LIMITER With the digital switch the maximum output voltage may be independently set for positive and negative This is available in both constant voltage mode and constant current mode However the set values are approximate values Adjustment range Positive Set between 5 kV and 10 kV with increments of 1 kV or no limit Negative Set between 5 kV and 10 kV with increments of 1 kV or no limit E Limit of output current DC CURRENT LIMITER The maximum output current DC and AC average values may be set continuously with the regulator This is available in both constant voltage mode and constant current mode However the set values are approximate values If the current exceeds the set value to limit the output current at the set value or to turn OFF the output may be selected with the switch Adjustment range Continuous variation from 0 to 10 mA Same value setting for positive and negative 8 7 Others B Signal ON OFF SIGNAL ON OFF When the SIGNAL switch or with remote control input is OFF the command value for the high voltage amplifier is set to OV and OA The output circ
76. ifier is always connected tot the output terminal When the following operations are made in SIGNAL ON SIGNAL OFF occurs forcibly When operation mode CV CC of the amplifier is changed When remote local settings are changed In SIGNAL OFF the OFF LED lights For the following cases the OFF LED blinks The HIGH VOLTAGE POWER SUPPLY switch is OFF When the internal high voltage DC power supply is OFF When the following operations are made in SIGNAL ON SIGNAL OFF occurs forcibly and the LED changes from lighting to blinking An error during OFF turns the OFF LED from lighting to blinking The fan revolution stopped Temperature in the casing became high Voltage of the internal control power supply became low When the LIMIT TRIP is set to TRIP the current limiter circuit was activated In the cases above SIGNAL ON cannot be recovered unless the cause is removed HVA4321 3 3 3 2 Amplifier LIA 3 2 Amplifier 3 2 1 Amplifier operation mode B CV CC It is the switch to set the operation mode of the unit CV Constant voltage mode CC Constant current mode The gain of the high voltage amplifier is Constant voltage mode 1000V 1V Constant current mode 1 mA 1V B DC BIAS CV CC It is the switch to set the DC signal operation mode in constant current mode CV The DC signal is constant voltage mode The AC signal is constant current mode CC Both the DC signal and the AC signal are constant current mo
77. ights despite SIGNAL OFF E When SIGNAL is ON Problem The output warning lamp of this unit may light depending on the load conditions or response settings In constant current mode the output warning lamp may light when the voltage limit is set to a and negative values large difference between positive Change the response settings Check the output monitor with an oscilloscope and check if there is any oscillation Set the positive and negative voltage limit values to the same level as much as possible Is the output open in constant current mode Cause Be sure to connect the load Action Unexpected high voltage output is given in constant current mode Is the load correctly connected Make sure that the connection to the load is correct Unexpected high voltage output is given in constant current mode or LOAD mode Is the load connected to the TOTAL terminal Connect the load to the LOAD terminal correctly Is the load grounded Do not ground the load When the output is short circuited in constant current constant voltage mode over current occurs DC bias operates at constant voltage in constant current constant voltage mode Do not short circuit the output in constant current constant voltage mode When the current limiter is activated for capacity load peak current increases When voltage becomes non linear due to activation of
78. independently for positive and negative values in the range from 5 kV to 10 kV For example the output is sufficient up to 8 kV set the VOLTAGE LIMITER to 8 kV and 8 kV When voltage limitation is not required set it to MAX B Current limiter The current limiter function can limit the average value of the output current in the range from 0 mA to 10 mA For example to limit the output current up to 5 mA set it to 5 mA When current limitation is not required set it to 10 mA which is turned to the rightmost position B LIMIT TRIP Set the protection mode for activation of the current limiter When LIMIT is selected current is limited to the set current When TRIP is selected the input signal is immediately OFF for activation of the current limiter circuit and the output is OV Select either one as required f Current monitor mode settings In total mode set it to TOTAL CURRENT and in load mode set it to LOAD CURRENT Figure4 8 Current monitor mode settings HVA4321 4 5 4 1 Operation example in constant voltage mode LAE g RESPONSE knob settings Set the CV RESPONSE knob to TOP RESPONSE Set it to TOP Figure4 9 Response settings 4 1 2 Connection of signal source and connection of load a Connection of input signal source Give the signal generator e g oscillator output to OSC INPUT When applying the external DC bias give the DC signal source output to EXT DC BIA
79. ired level Saw ON OFF DC standard power supply Figure4 33 Using external DC bias signal B High voltage display When the output voltage exceeds 130V to 150V the high voltage output LED lights and starts rotation slowly The higher the output voltage is the faster the rotation is When the voltage exceeds 4 9 kV the color changes from orange to red B Gain adjustment with RESPONSE The gain of 200 kHz band or more may vary depending on the RESPONSE knob position Refer to 5 3 Characteristics in constant voltage mode Chapter 5 When the frequency is used at 200 Hz or more measure the output voltage of the voltage monitor and adjust RESPONSE so that the desired amplitude may be obtained HVA4321 4 25 4 2 Operation example in constant current mode total ILI AA A WARNING It is very dangerous during output of high voltage Never touch the output cable or the high voltage area If you find a dangerous status due to a unit error or load error turn OFF the POWER switch immediately 4 2 5 Signal OFF a Input signal OFF To set the output signal to OV temporarily press OFF of the SIGNAL switch A WARNING When SIGNAL is OFF the output voltage is OV but the internal high voltage DC power supply is ON It continuously gives high voltage output In this status never touch the output cable or the high voltage area for safety b Internal high voltage DC power supply OFF
80. istics in constant current mode 5 3 1 Frequency characteristics B Frequency characteristics of output current for input voltage in constant current TOTAL mode with short circuit and resistance load ail Mie GAIN KB Short circuit E ET pi gt ia Be 1M 1 MQresistance load resistance a 40 400 4k 10k 400K FREGLENCY Hz Figure5 8 Frequency characteristics in constant current TOTAL mode B Frequency characteristics of output current for input voltage in constant current LOAD mode with short circuit and resistance load GAIN dB A RESPONSE RESPONSE rightmost N San o M amni Tf N III Ii 1 Lj NI RESPONSE leftmost J i 20 AAA Ds 1M 1 MQresistance load Y resistance E Figure5 9 Frequency characteristics in constant current LOAD mode HVA4321 5 5 5 3 Characteristics in constant current mode 5 3 2 Step response W Step response in constant current TOTAL mode with 1 M resistance load Measure the current monitor TTT bed gle Ls az T pub Trpo E E TT MEE PITT T L RESPONSE rightmost MR e ie e iere GND i i i 1 134 7 Ret Ama mu u au mu m un u mu L RESPONSE leftmost Erw jos id MN BEN nun du L utis L uud ER J Horizontal axis 250 Q div Vertical axis 200 mV div Figure5 10 Step response in constant current mode wit
81. l indicates the ON position of the power switch This symbol indicates the OFF position of the power switch This symbol indicates that the external conductor of the connector is connected to the case 0 This symbol indicates that the external conductor of the connector is connected to the signal ground HVA4321 lil Contents Page 1 Overview 1 1 E A dne die 1 1 1 2 Function description and block diagram eee 1 3 1 2 1 Function descriptlon edendi Ec ee exe Er aane ene o Rec ree ove ik a EE catcceceueddaxtevesive 1 3 1 2 2 Block diagram eerie eie eere te hen decer eo gei nina 1 4 Preparations before use 2 1 Before using the HVA4321 1 ee nine nn nare 2 1 2 2 InstallatiON TEES 2 2 2 3 Grounding and power supply connection esee 2 3 3 Nomenclature and functions 3 1 Signal system eiue ini REMEDIA 3 1 3 1 4 Internal DC bias signal SOUMCE cccececeeece a eee ee ee ee eee ee ee nun nnnnnnnnnn nennen nennen 3 1 3 1 2 External bias signal input insenerina eee cece ee ee ee eee ee ee ee takani ndandani arae nennen nennen 3 1 3 1 3 Externalisignal inp t is paced a an A nahen aaa EA ia 3 2 3 14 Input signal ONJ OEF 222 ee a se caasa Dea EOD 3 2 3 2 P Xue ES 3 4 3 2 1 Amplifier operation mode cui ii ee VOR avara DE REO 3 4 3 2 2 Amplifier control u u ecce e creo eee acra sek uE Y
82. l is pressed H GH VOLTAGE POWER SUPPLY This must be pressed Figure2 2 Check of internal high voltage DC power OFF HVA4321 2 3 2 3 Grounding and power supply connection b Connection of power cable Insert the connector of the power cable accompanying the unit into the inlet of the back panel H NE 100V 50Hz 60Hz 800VA MAX Insert the connector Figure2 3 Inserting power cable connector c Inserting the power outlet This unit operates with the power of AC100V 10 Insert the power cable plug into the power outlet with the protective ground Use the accompanying power cable and insert it into the power outlet with the ground The casing of the unit is then grounded Using 3 pin 2 pin adapter When 3 pin 2 pin conversion adapter is sued be sure to connect the ground wire of the conversion adapter to the ground terminal near the outlet Ground Figure2 4 Using conversion connector HVA4321 2 4 2 3 Grounding and power supply connection O If the ground pole is not available in the adjacent area If the power cable cannot be grounded because the ground pole is not available at the power outlet be sure to ground the casing ground terminal at the back with a 2 wire of 2 mm or more Casing ground terminal Figure2 5 Casing ground terminal A WARNING Be sure to ground this unit for safety Otherwise a serious accident such as electric shock may oc
83. l of signal system in remote control operation Back panel control High Approx 5V Low Approx 0V signal Open Close Signal status OFF ON HVA4321 3 14 SIGNAL ON OFF controls a batch ON OFF operation for input signals with external signal 3 3 Monitor and control signal system LAE B SIGNAL ON OFF When SIGNAL is ON and ON becomes OFF for some reason turn the control signal OFF once and turn it ON again Otherwise SIGNAL is not ON Front panel REMOTE LOCAL switch Back panel SIGNAL ON OFF signal Output status REMOTE 2 It must be turned OFF once and ON again when the output ON command is given OFF ON OFF status Table3 3 Logic of SIGNAL ON OFF signal SIGNAL ON OFF signal in remote control operation Low Positive logic Back panel control signal ON status OFF status 1 When the output is OFF due to over current Figure3 22 Remote control of signal ON OFF High Positive logic Open Close HVA4321 Signal status OFF ON ON status 3 3 Monitor and control signal system B SIGNAL ON OFF STATUS It is the terminal to give contact signal output linked to SIGNAL ON OFF status Table3 4 Status contact output signal Terminal signal Signal name Explanation Terminal for fixing Do not use it Not connected Not connected to any line It can used as a relay terminal Common terminal for
84. ly DC is detected here The monitor is hardly affected HVA4321 4 15 4 2 Operation example in constant current mode total 4 2 1 Panel setting a Internal high voltage DC power supply OFF When HIGH VOLTAGE POWER SUPPLY is not OFF press the button until a click sound is heard When a click sound 1s heard the switch 1s locked in OFF status The internal high voltage DC power supply is always OFF Press the switch until a click From side sound is heard ON TEBEO T Hi LDAA Y FEM OFF B Locked status Figure4 19 Internal high voltage DC power OFF b Signal system OFF Turn the internal DC bias knob to the leftmost position to minimize the value Turn OFF the switches of DC BIAS OSC INPUT and EXT DC BIAS INPUT Figure4 20 Switch settings HVA4321 4 16 4 2 Operation example in constant current mode total c Output mode settings Set the output mode switch to CC Set the DC BIAS to CC Figure4 21 Output mode settings d Remote local settings To operate this unit from the panel set the ON OFF CONTROL switch to LOCAL Refer to 4 6 Remote control operation for remote control operation OFF STATUS Figure4 22 Local settings HVA4321 4 17 4 2 Operation example in constant current mode total LIBE e Output limiter settings To limit the output voltage and out
85. mA For example to limit the output current up to 5 mA set it to 5 mA When current limitation is not required set it to 10 mA which is turned to the rightmost position B LIMIT TRIP Set the protection mode for activation of the current limiter When LIMIT is selected current is limited to the set current When TRIP is selected the input signal is immediately OFF for activation of the current limiter circuit and the output is OV Select either one as required f Current monitor mode settings In total mode set it to TOTAL CURRENT In load mode set it to LOAD CURRENT Figure4 57 Current monitor mode settings HVA4321 4 44 4 4 Operation example in constant current constant voltage mode LIIL M g RESPONSE knob settings Set the CC RESPONSE knob to the rightmost position CV is invalid RESPONSE Turn to the rightmost Figure4 58 Response settings 4 4 2 Connection of signal source and connection of load a Connection of input signal source Give the signal generator e g oscillator output which is the signal source of constant current to OSC INPUT When applying the external constant voltage signal source give it to EXT DC BIAS INPUT Signal generator
86. mA for DC For AC the average current for positive side is 3 mA and the average current for negative side is 3 mA Original output current level For DC MAL Limited by average current of 3 mA Limited by average current of 3 mA Figure3 9 Operation of current limiter Use this current limiter paying attention to the following The limit current set here is only a guideline The setting accuracy is not high It is limited not by peak current but by average current The voltage waveform of a load capacity may be non linear due to limitation by average current resulting in increase of peak current B LIMIT TRIP In LIMIT the output current is limited with the setting value In TRIP if the output current exceeds the set value SIGNAL is switched OFF and the output is OV HVA4321 3 7 3 2 Amplifier B RESPONSE CV In constant voltage mode the step response waveform such as square wave is adjusted As the dial is turned toward the right the response approaches the peak Make adjustment for the desired response waveform Figure3 10 Response function in constant voltage mode B RESPONSE CC In constant current mode the step response waveform such as square wave is adjusted As the dial is turned toward the right the response approaches the peak Make adjustment for the desired response waveform Response rightmost Te Response leftmost Figure3 11 Response function in co
87. measuring method of frequency characteristics for output voltage and voltage monitor is as shown in the figure below For output current measure voltage at both ends of the current detection resistance Connect load as required Take measurements with the load cable length of approx 15 cm for resistance load and with the load cable length of approx 5 cm for capacity load Frequency characteristic analyzer ooo0000 o00000 Signal input Current detection analyzer Current monitor Output current Figure5 3 Measuring method of output current Representative characteristics are shown on the following pages However these do not assure the performance Use them as reference data Scale of frequency characteristics Output voltage Since the gain of the high voltage probe is 1 1000 60 dB 0 dB line on the diagram is actually 60 dB Output current The current detection resistance is 1 kQ HVA4321 5 2 5 2 Characteristics in constant voltage mode 5 2 Characteristics in constant voltage mode 5 2 1 Frequency characteristics B Frequency characteristics of output voltage in constant voltage mode without load GAIN KB RESPONSE ngrios T JE ERBEN x im SCHEN SEIN PR ai di CERT ERE LE Lu LH 3 Figure5 4 Frequency characteristics in constant ree mode without load B Frequency characteristics of output voltage in constan
88. med while SIGNAL is ON it is forcedly OFF Figure4 73 Remote control switch 4 6 3 Connection of control signal Connect the control signal to the BNC connector at the back TTL level logic signal and contact signal can be used as control signal OFF Hi TTL level Positive logic Open Contact signal ON Lo TTL level Positive logic Close Contact signal When only the HIGH VOLTAGE POWER SUPPLY ON OFF switch at the front panel is ON and when the HIGH VOLTAGE POWER SUPPLY ON OFF signal at the back panel is ON the internal high voltage DC power supply is ON HVA4321 4 58 9 Representative characteristics j 5 1 Measuring method Paar Bar a 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3o 3o 3 o 3 o 3 o 3 o 3 5 1 5 2 Characteristics in constant voltage mode 5 3 5 2 1 Frequency characteristics rennen 5 3 5 2 2 Step FESPONSE sehn noh nnn 5 4 5 3 Characteristics in constant current mode 5 5 5 3 1 Frequency characteristics ren 5 5 5 3 2 Step FESPONSE tt tet tess tenses eee es 5 6 5 4 Characteristics in constant current and constant voltage mode ttt 5 7 5 4 1 Frequency characteristics rennen 5 7 5 5 Characteristics of voltage monitor and current monitor 5 8 5 5 1 Frequency characteristics rennen 5 8 5 6 Others om o o8 9 3 5 3 3 3 OB O9 3 8OBO 3 3 BON 9 3 3 NOB 3 3 9 3 3 3 o 3 3 5 9 5 6 1 Delay of output signal
89. n example of this unit in constant current constant voltage mode In this mode AC signal is constant current and DC signal is constant voltage This mode is used to run AC by applying DC bias to capacity load In constant current mode total mode and load mode previously described can be selected The frequency at the boundary of the constant voltage operation and the constant current operation varies depending on the load capacity Refer to 3 2 1 Amplifier operation mode Chapter 3 and Figure5 4 and Figure5 12 5 4 Chapter 5 The TOTAL terminal of OUTPUT Lo is connected to the casing Therefore the total mode can be used for grounded load or load that can be grounded CAUTION In load mode leak current with stray capacitance and load current are detected from different routes Therefore load mode cannot be used for load which is grounded N CAUTION Constant current operation is available for AC signal and constant voltage operation is available for DC signal When the signal is ON unusual voltage output is not given with the output open When the output is short circuited be careful for DC short circuit current HVA4321 4 40 4 4 Operation example in constant current constant voltage mode Output terminal lou O e ourmur H toe Internal capacity Wire capacity EC resistance Current detection resistance OUIPUT Lo for total
90. nal 1s not found for DC signal Therefore use the DC signal in total mode HVA4321 4 4 1 Operation example in constant voltage mode Output terminal Q VC IPUDH Internal capacity Wire capacity e odis Current detection resistance for total e IdcH ac Current monitor Current detection resistance for load Voltage monitor Figure4 2 Constant voltage mode load mode lamp Output current of high voltage amplifier lint Leak current with internal capacity lout Output current Istr Leak current with wire capacity lload Load current lac Idc DC and AC of detected current In load mode only load current is directly detected The current monitor can monitor load current only In load mode of constant voltage mode OAdvantage Only load current can be monitored ODisadvantage One end of load cannot be directly grounded There is a current detection resistance 33 Q between load end and ground The voltage of output current x current detection resistance 33 Q for set output voltage is an error in load When the load current is 10 mA the error is 330 mV HVA4321 4 2 4 1 Operation example in constant voltage mode 4 1 1 Panel setting a Internal high voltage DC power OFF When the HIGH VOLTAGE POWER SUPPLY switch is not OFF press the button until a click sound is heard When a click sound is
91. nne nnn 7 1 Check method of constant voltage mode esee 7 3 Check method of constant current mode esee nnne 7 4 jerinIngdilie eL 8 2 Voltage and current range allowed for Output oooocconnconnccccnconnncnonnnennnnnnnnnnnnrnnnnrnnnrnnnannna 8 3 Tables Page Table2 1 ACCOSS OMICS me E M 2 3 Table3 1 Logic of HIGH VOLTAGE POWER SUPPLY ON OFF eeseseseseeeee nn 3 3 Table3 2 Logic of signal system ON OFF signal esee nnn 3 3 Table3 3 Logic of SIGNAL ON OFF signal eese nnne nennen nnne nnn nnne 3 3 Table3 4 Status contact output signal iain e ienaa iaaiaee a aaae aaa iaaa eee 3 3 HVA4321 xi 1 Ovevew 1 1 Features so rr nn 1 1 1 2 Function description and block diagram 1 3 1 2 1 Function description 3 B 3 3 3 B N B N 3 3 3 3 8 NR 3 3 3 3 9 1 3 1 2 2 Block diagram s 3 8 8 8 B S B 3 B8 3 3 3 9 3 3 3 9 3 5 3 9 3 3 3o 3 1 1 Features LA 1 1 Features The HVA4321 10 kV AC DC amplifier is a constant voltage constant current amplifier capable of 10 kVpk and 10 mApk Since the unit has a DC bias signal source it can be used as a DC power supply that is individually capable of high voltage output Since external AC signal and DC signal input are allowed it can also be used as an amplifier capable of high voltage output B Constant volt
92. nstant current mode CAUTION The step response using RESPONSE may not be sufficiently adjusted depending on setting conditions or load conditions In a case oscillation may occur HVA4321 3 8 3 2 Amplifier 3 2 3 Output E HIGH VOLTAGE POWER SUPPLY ON OFF Turn ON OFF the internal high voltage DC power supply H GH VOLTAGE POWER SUPPLY Press the switch until it clicks It is then locked and the PUSH OFF internal high voltage DC power supplies is OFF To turn it ON turn the knob to the right It is unlocked and the internal high voltage DC power supply is ON PULL ON Be sure to press the above switch to tum OFF the HV power for safety when the output wiring is changed N DANGER Never touch the output cable during output for OUTPUT H safety O O m O O O 10kV MAX O O O O O 10mA MAX O go Figure3 12 Output area A WARNING When wiring for load or output is changed be sure to turn OFF push this switch Make sure that the OFF lamp at the left of the switch lights before work Do not touch load or the output cable with the internal high voltage DC power supply ON Otherwise electric shock may occur When the power is supplied the internal high voltage DC power supply is always OFF regardless of ON OFF status of this switch If this switch is ON turn it OFF once and turn it ON again Power switch HIGH VOLTAGE POWER SUPPLY _OFE OFF ON Switc
93. oad 4 3 1 Panel setting a Internal high voltage DC power supply OFF When HIGH VOLTAGE POWER SUPPLY is not OFF press the button until a click sound is heard When a click sound 1s heard the switch 1s locked in OFF status The internal high voltage DC power supply is always OFF Press the switch until a click From side sound is heard r H GH VOLTAGE B POWER SUPP ON H OFF B Locked status Figure4 35 Internal high voltage DC power OFF b Signal system OFF Turn the internal DC bias knob to the leftmost position to minimize the value Turn OFF the switches of DC BIAS OSC INPUT and EXT DC BIAS INPUT Figure4 36 Switch settings HVA4321 4 29 4 3 Operation example in constant current mode load c Output mode settings Set the output mode switch to CC Set the DC BIAS to CC Figure4 37 Output mode settings d Remote local settings To operate this unit from the panel set the ON OFF CONTROL switch to LOCAL Refer to 4 6 Remote control operation for remote control operation OFF STATUS Figure4 38 Local settings HVA4321 4 30 4 3 Operation example in constant current mode load CALL e Output limiter settings To limit the output voltage and output current set the limiter level as required VOLTAGEKY DC CURRENT mA UMT DAC e 10 10 5 MAX
94. of internal high voltage DC power supply For HIGH VOLTAGE POWER SUPPLY ON OFF the control with external signal 1s always effective regardless of REMOTE or LOCAL settings on the front panel switch Therefore when external control is not used be sure to short circuit the control input terminal at the back with an accompanying shorting plug If shorting is not performed the internal high voltage DC power supply is not ON although HIGH VOLTAGE POWER SUPPLY ON OFF switch on the panel is ON HVA4321 3 13 3 3 Monitor and control signal system LA Front panel HIGH VOLTAGE CFF ON POWER SUPPLY Locked status Unlocked status ON OFF switch Back panel HIGH VOLTAGE POWER SUPPLY ON OFF signal Internal high voltage OFF status ON status OFF status DC power supply status Figure3 20 Remote control of HIGH VOLTAGE POWER SUPPLY ON OFF B ON OFF of signal system Each signal of INT DC BIAS ON OFF EXT DC BIAS ON OFF and OSC INPUT ON OFF can be individually controlled for ON OFF To give a signal output from the output terminal both the desired signal ON OFF and SIGNAL ON OFF must be ON Front panel REMOTE LOCAL switch ON OFF signal of each signal Back panel SIGNAL ON OFF signal No output Signal output Figure3 21 Remote control of signal system ON OFF Table3 2 Logic of signal system ON OFF signal ON OFF signa
95. of the SIGNAL switch While reading the value on the voltmeter or oscilloscope connected to the voltage monitor increase the output level of the oscillator gradually If fine adjustment of the output level is required adjust it at the oscillator or adjust it with GAIN of the unit Turn GAIN to the left the gain is decreased Turn GAIN to the right the gain is increased The gain can be adjusted in the range of approximately 3 HVA4321 4 11 4 1 Operation example in constant voltage mode Adjust it to the Set to 0 desired level DOY GAN O B 5 Oscillator Figure4 16 Using external oscillator Select polarity S GNAL i NORMAL ON P c Using external DC bias signal source Connect the DC standard power supply to EXT DC BIAS INPUT and make sure that the output of the standard power supply is OV Turn ON the external DC bias ON OFF switch and press ON of the SIGNAL switch While reading the value on the voltmeter or oscilloscope connected to the voltage monitor increase the output level of the DC standard power supply gradually and set the desired voltage Adjust it to the Set to 0 desired level ON IL F DC standard power supply Figure4 17 Using external DC bias signal B High voltage display When the output voltage exceeds 130V to 150V the high voltage output LED lights and starts rotation slowly The higher the output voltage is the faster the rotation is When the
96. of the SIGNAL switch While reading the value on the voltmeter or oscilloscope connected to the voltage monitor increase the output level of the oscillator gradually If fine adjustment of the output level is required adjust it at the oscillator or adjust it with GAIN of the unit Turn GAIN to the left the gain is decreased Turn GAIN to the right the gain is increased The gain can be adjusted in the range of approximately 3 HVA4321 4 37 4 3 Operation example in constant current mode load Adjust it to the Set to 0 desired level Select polarity S8 GNAL ON GAN Figure4 48 Using external oscillator c Using external DC bias signal source Connect the DC standard power supply to EXT DC BIAS INPUT and make sure that the output of the standard power supply is OV Turn ON the external DC bias ON OFF switch and press ON of the SIGNAL switch While reading the value on the voltmeter or oscilloscope connected to the voltage monitor increase the output level of the DC standard power supply gradually and set the desired voltage Adjust it to the Set to 0 desired level Er ON Figure4 49 Using external DC bias signal B High voltage display When the output voltage exceeds 130V to 150V the high voltage output LED lights and starts rotation slowly The higher the output voltage is the faster the rotation is When the voltage exceeds 4
97. oooonncconnconnncconncennconnncnnnnnennnnnnnrnnnrnnnnrennnrnnnens 4 58 Representative characteristics Measuring method u srns0rnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nennen nennen nnnnnennnnnenn nenn 5 1 Characteristics in constant voltage mode eee 5 3 5 2 1 Frequency characteristics 2 c cccceeceeeee cece eee ee ce ee eee ee eee eee ee ea nese ehh essen sea nnn nnne 5 3 5 2 2 Step response TO 5 4 Characteristics in constant current mode ooocconncconnnccnnccnonnninnnrcnnncnnnnnennnnenanenenns 5 5 5 3 1 Frequency characteristics unsnnnennnennennnnnnennnnnnnnnnnnnnnnnnnnnnnnnnnnennn nenne nnnnenen nennen sn 5 5 5 3 2 Op response iii ii eoe lita ee TEN sell 5 6 Characteristics in constant current and constant voltage mode 5 7 5 4 4 Frequency characteristics ieuane aasa ce ee eee ee ee ee eeae ee ea nessa nn nnn nennen nnne 5 7 Characteristics of voltage monitor and current monitor eesss 5 8 5 5 1 Frequency characteristics cccccceeceeeee cece eee ee ee ee eee nese nessa ee ea nnne nh nnn nnnm nennen anne 5 8 Lo 11 1 E PEE 5 9 5 6 1 Delay of output signal for input Signal 2 ccceceeeee cece ee ee ee ee ence ee ence ee eee sae eeeeeeeeeeees 5 9 5 6 2 Step response due to difference of amplitude cooonconncconncocnnonnnnccnnnnnnncnannrennnnnnnennns 5 10 6 Troubleshooting 6 1 When suspecting a fault
98. or safety B External control system The signal source can be turned ON OFF with an external contact signal or TTL level signal HVA4321 1 3 1 2 Function description and block diagram OOO o N9119 01 U09 JJO NO jn24i NV Add d A soveoipul q31 bk Ae ds Senon gbi MER Es dde za idsiq o eyon yBIH f 3OVL IOA HOIH El Kk HOMO ans Ajddns m YOLINOW SEX LIOA ANY AS 18MOd isna A ASL f amp iddns F iddns o Joy iren anuo G lt ar nog TA A ddns QNO AH Jamod 044U09 amod AEE QNO AH Aci o no aVO1 WLOL IS 101 u09 jeulejx3 CN OT n3119 ASNOdsaYy 101Ju09 BJOWSI uonoejep 104 euBis jou02 44O NO a T 1nidino eBeyoA 22 Adans vod yinoulo ote ION HOH uonoejep Od us PYN 2 nani svia OO NO o T e NATL 3 an Svid od Ll ONO jeAug 8 IH Indino 1eqy jeondo Ana T NANI OSO Josues uang UO1 99 01d WM 4D ved n i Jena JJO NO NIV Jeyijduie
99. output monitor is 0 5 or less DC standard power supply Current detection resistor e DI 00 00 IT Ol O OOO Voltmeter Voltmeter output monitor output Figure7 3 Check method of constant current mode HVA4321 7 4 8 Specification 777 8 1 Signal ACA nn nn 8 1 8 2 Amplifier n a ar Bar ar Bar 3 3 3 3 ar 3 3 3 3 3 3 O3 3 OU 3 ON Be ar Be o3 o3 n 8 2 8 2 1 Characteristics of constant voltage mode 8 2 8 2 2 Characteristics of constant current mode c 8 4 8 3 Output area coc n n n n n n nn 8 6 8 4 Monitor output TRE NOE a Gi GLO DE II E LUE II ROLE RI 8 6 8 5 Other input output signal ACRI RR AUR Gare BUR ae ROBUR ACE QURE RR RR 8 7 8 6 Protection circuit rennen nn nn 8 8 87 Others c nn m RR n 8 8 8 8 General items I 8 9 8 1 Signal area LA 8 1 Signal area Unless otherwise specified the listed values are at no load open circuit in constant voltage mode and short circuit in constant current mode E Internal signal source for DC bias Output adjustment range In constant voltage mode Equivalent to the output voltage range from 0 V to 10 kV In constant current mode Equivalent to the output current range from 0 mA
100. plug inserted into the HIGH VOLTAGE POWER SUPPLY ON OFF terminal at the back Action Insert the shorting plug for operation in LOCAL mode 2 Is the DC CURRENT value the minimum and is TRIP selected Action Increase the current limit or select LIMIT 3 Is temperature of exhaust air extremely high Action Temperature in the casing may be too high Leave the unit at a cool environment for dozens of minutes Then turn ON the HIGH VOLTAGE POWER SUPPLY switch again 4 Are all fans at the back operating Action Check if there is any object that blocks rotation of a fan If a fan does not rotate without any blocking the fan may be faulty It must be repaired HVA4321 4 23 4 2 Operation example in constant current mode total ILI Ehe ee ng When either ofthe above is not applicable the internal high voltage DC power supply may be faulty In this case it must be repaired 4 2 4 Signal output and adjustment a Using internal DC bias signal source Make sure that the internal DC signal source dial is 0 Set the polarity switch to the desired polarity Turn ON the internal DC bias signal source ON OFF switch and press ON of the SIGNAL switch While reading the value on the voltmeter or oscilloscope connected to the voltage monitor turn the dial gradually to the right Set it to the desired voltage Adjust it to the Set to 0 desired level DCHAS es RO Select polarity S GNAL Md ON Ic OFF
101. put current set the limiter level as required U MTER VOLTAGE kV DC CURRENT mA UMT N 10 S 10 25 e Mx 5 MAX Figure4 23 Limiter settings E Voltage limiter The voltage limiter function can limit the maximum value of the output voltage independently for positive and negative values in the range from 5 kV to 10 kV For example the output is sufficient up to 8 kV set the VOLTAGE LIMITER to 8 kV and 8 kV When voltage limitation is not required set it to MAX E Current limiter The current limiter function can limit the average value of the output current in the range from 0 mA to 10 mA For example to limit the output current up to 5 mA set it to 5 mA When current limitation is not required set it to 10 mA which is turned to the rightmost position B LIMIT TRIP Set the protection mode for activation of the current limiter When LIMIT is selected current is limited to the set current When TRIP is selected the input signal is immediately OFF for activation of the current limiter circuit and the output is OV Select either one as required f Current monitor mode settings In total mode of constant current mode set it to TOTAL CURRENT Figure4 24 Current monitor mode settings HVA4321 4 18 4 2 Operation example in constant current mode total AAA ___ gt gt gt gt gt 07 g RESPONSE knob settings Set th
102. r When the 3 pin power plug 1s connected to the 3 pin power outlet with protective ground contact this product is automatically grounded To use 3 pin 2 pin conversion adapter be sure to connect the ground line green of the conversion adapter to the ground terminal near the outlet If the ground terminal is available at the back panel the terminal may be grounded with a wire equivalent to or larger than the thickness of the power cable O Check the power supply voltage This product operates on the power supply voltage indicated in Grounding and Power Supply Connection in this instruction manual Prior to connecting the power supply check that the voltage of the power supply matches the rated power supply of the product O Observe the fuse rating Fire may occur Use the rated fuse specified in Grounding and Power Supply Connection in the instruction manual When the fuse is replaced be sure to disconnect the power cable from the outlet O In case of suspected anomaly If this product emits smoke an abnormal smell or abnormal noise immediately disconnect the power cable and stop operation If such an anomaly occurs do not use this product until it has been repaired and immediately report the problem to the location of purchase either NF Corporation or your distributor Do not use this product when gas is present Otherwise it may cause an explosion HVA4321 ii Do not remove the cover This product contains high volta
103. re3 15 Figure3 16 Figure3 17 Figure3 18 Figure3 19 Figure3 20 Figure3 21 Figure3 22 Figure3 23 Figure4 1 Figure4 2 Figure4 3 Figure4 4 Figure4 5 Figure4 6 Figure4 7 Figure4 8 Figure4 9 Figure4 10 HVA4321 Page HVA4321 Block diagram 2 a ee rea donus a os sp Quo e tienes ae an 1 4 Check of power OFF onini red break ne Cox Ed co ue nude A A e edv RE Arca 2 3 Check of internal high voltage DC power OFF 22 cccceceeeeeeeeeeeeeeeeeeeeee eee eeeeeeeneeees 2 3 Inserting power cable CONMNCCHOL 22 cccceeeeece cece eee ee ee eee ence nnnnnnnnnnnnnn nen nnnnnnnnnn nenn nun 2 4 Using conversion connector 2ecc cece cece cece e eee ee eee eee ee ee ee ee ee nnne nent nese ehh essen eee nnn nnne 2 4 Casing ground terminal a ei eet eere dial reeds 2 5 Internal DC bias signal source c cceeceeeeee teen eee ee ee cece ee ee ee eee ee aa nese nnn nn nnn rre 3 4 External DC bias input iiie iiec lcd Dh cusvbosdoaeugccateaveeeteouae 3 1 External signal input eed ee EDI took ee eco DAE iia 3 2 Signal ON OFF switch icon 3 2 Operation mode switch eiii a ce pecore quus eo aan de Fes do Feu Dd Ro TONER eR oa ee 3 4 Limiter and response sa urn dofus eux Deere EHI eee 3 6 Operation of voltage limiter 1 44 4444444HHHnnn mann Hnn nn ann nnnnn nun nn annnnnnnnnnen nn 3 6 Operation of voltage limiter 2 ccecc cece ee ee cece ence ee
104. ring method of output current 22 c cece cee ee ee ence ee ee ee ee ee ee eee ee eee eee enna nun anne eens 5 2 Frequency characteristics in constant voltage mode without load 5 3 Frequency characteristics in constant voltage mode with capacity load 5 3 Step response in constant voltage mode without load ssesuess 5 4 Step response in constant voltage mode with 35 pF load 5 4 Frequency characteristics in constant current TOTAL mode 5 5 Frequency characteristics in constant current LOAD mode 5 5 Step response in constant current mode with 1 MOload esses 5 6 Frequency characteristics in constant current TOTAL constant voltage mode 5 7 Frequency characteristics in constant current LOAD constant voltage mode 5 7 Frequency characteristics of voltage MOMItOM cceeeeeeee cece ee eeeeee eee eeeeeeeeeeeeeeeeeee 5 8 Frequency characteristics of current monitor eeeeeeeeeeeeeen nenne 5 8 Delay of input output signal oooncconncccnnnonnncnonnnennnnnnnnnnncnnnnnnnnnrr narran rre narra 5 9 Step response in constant voltage mode seus 5 10 How to remove fan Cover nuuesnnsnnnennnnneennnnnennnnnnnnnnnnnnenn n nin nnns n innen nnne n
105. t voltage mode with 35 pF capacity load GAIN dB tid jjj RESPONSE rightmost m Wee NI TIL SA Hi essa N Te pc RESPONSE leftmost III esr N ui iiid TI ii iw BERN LLL A UN A m ELE Y Figure5 5 Frequency characteristics in constant voltage mode with capacity load 7 15 100 ik HVA4321 5 3 5 2 Characteristics in constant voltage mode LII 5 2 2 Step response E Step response in constant voltage mode without load Measure the voltage monitor 1 a O O E E PATATA AA YAA AAA AAA ATT L T3 a eo TET ON A Hn T3 1 35 T3 a a UE LEE atra L i E re 500 Vpk output a IS meme 7757575 55 7 Ela Ter Erase Ee ran m EE e Horizontal axis 25 Q div Vertical axis 100 V div left 5 kV div right Figure5 6 Step response in constant voltage mode without load pititiiit E Step response in constant voltage mode with 35 pF capacity load Measure the voltage monitor Bee eee a pu ee ee eee ee eee L i 1 2 RESPONSE rightmost NUN Pe Ti 1 TIT sf PO YE VEC UY Eoi ra Lora ra ra ar Euri 500 Vpk output Horizontal axis 25 Q div Vertical axis 100 V div left 5 kV div right Figure5 7 Step response in constant voltage mode with 35 pF load HVA4321 5 4 5 3 Characteristics in constant current mode 5 3 Character
106. temperature change or direct sunlight Store the unit in the environment at normal temperature HVA4321 7 2 7 4 Performance test LA 7 4 Performance test This section describes a simple performance test of the unit 7 4 1 Test of constant voltage mode The gain accuracy and the monitor accuracy when the standard signal input is given in constant voltage mode are checked Give voltage input from the reference DC power supply to the external DC bias signal input Make sure that the output is 10 kV for 10V input Make sure that the error between the actual output and the value of the output monitor is 0 3 or less DC standard power supply oo Voltage divider O O O gado oo poo 9 00 IB A Imm Voltmeter Voltmeter output monitor output Figure7 2 Check method of constant voltage mode HVA4321 7 3 7 4 Performance test LA 7 4 2 Test of constant current mode The gain accuracy and the monitor accuracy when the standard signal input is given in constant current mode are checked Given voltage input from the standard DC power supply to the external DC bias signal input Make sure that the output is 10 mA for 10V input Make sure that the error between the actual output and the value of the
107. tems above turn OFF the POWER Turn OFF Figure4 70 POWER OFF HVA4321 4 54 4 5 Change of load and power OFF LA A WARNING Ifa DC signal is amplified the load or the high voltage cable is charged with high voltage It takes time to discharge electricity after POWER OFF There may be risk of electric shock for a while Never touch the high voltage areas such as output terminal area load high voltage cable etc d Change of load 30 seconds or more after turning OFF the POWER change the load During change of the load remove the high voltage cable connector from the OUTPUT Hi terminal for safety A s Accompanying high voltage uide O O e Figure4 71 Removing high voltage cable After change of the load be sure to insert the high voltage cable into the connector e Re supply Make sure again that connections are safe Turn ON the POWER HVA4321 4 55 4 5 Change of load and power OFF LALLA 4 5 2 Power supply OFF The procedure from end of work to turning the power OFF is the same as 4 5 1 Change of load A WARNING Do not turn OFF the POWER switch with HIGH VOLTAGE POWER SUPPLY ON Approximately 200V output may be generated Be sure to turn OFF HIGH VOLTAGE POWER SUPPLY first before POWER OFF However this does not apply to emergency Turn OFF the POWER immediately HVA4321 4 56 4 6 Remote control lle
108. to 10 mA With 10 rotation potentiometer Inversion function Available Signal ON OFF function Available ON OFF with external signal is also available B Signal input for oscillator Input voltage range 10 Vpk Input terminal BNC Input resistance 10kQ 10 Gain adjustment range 3 Continuously variable with semi fixed regulator Inversion function Available Signal ON OFF function Available ON OFF with external signal is also available E Signal input for DC bias Input voltage range 10 Vpk Input terminal BNC Input resistance 10kQ 10 Signal ON OFF function Available ON OFF with external signal is also available Polarity Same phase as the output HVA4321 8 1 8 2 Amplifier LIAE 8 2 Amplifier 8 2 1 Characteristics of constant voltage mode B Amplifier gain 1000 V 1 V 60 dB E Gain accuracy when external signal source for DC bias is used 0 3 of full scale E Gain temperature drift 100 ppm typ B Rated load Resistance load 1000 k Q Capacity load 35 pF including output cable capacity B Maximum output voltage 10 kVpk for DC AC B Maximum output current Average current 10 mA for DC AC Pulse peak current 60 mA or more DC 10mA Average current 10mA Pulse peak current 60 mA Average current Figure8 1 Output current HVA4321 8 2 8 2 Amplifier Output voltage Output current DC range AC range The AC range is 200 Hz or more
109. uit and the output terminal of the high voltage amplifier are not disconnected electrically Since the output circuit and the output terminal of the high voltage amplifier remain connected to change load or wiring turn OFF the internal high voltage DC power supply and the power of the unit before work E internal high voltage DC power supply ON OFF switch HIGH VOLTAGE POWER SUPPLY ON OFF This switch turns ON OFF the output of the internal high voltage DC power supply The output status of the internal high voltage DC power supply is indicated by LED E High voltage output lamp During high voltage output the LED around the output connector rotates and blinks The rotation speed varies according to the output voltage The LED color is orange for approx 4 9 kVpk or less and red for approx 4 9 kVpk or more B Adjustment of step response waveform RESPONSE CV RESPONSE CC The step response characteristics may be independently adjusted in constant voltage mode and constant current mode A semi fixed regulator is used for adjustment The adjustment range varies depending on the load condition In cases oscillation may occur HVA4321 8 7 8 8 General items LIAE 8 8 General items E input output ground All signal input output BNC connector excluding the terminal block for ON OFF status signal contact output and the total current terminal of the high voltage output terminal OUTPUT Lo are connected to the casing B Power supply

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