User Manual
Contents
1. HV QUAD Series Installation and User Manual Rev 1 0 4 3 Output Characteristics General properties The HV series devices feature stable bipolar low current DC voltage outputs The 16 outputs are grouped in 8 pairs of complementary channels Every output pair has two components A positive output and a negative output both are unipolar in case of the Quadrupole version bipolar in the Steerer version These pairs are labelled as 1 and 1 up to 8 and 8 All positive outputs range from OV to the maximum specified output voltage which is either 275V or 450V unipolar or bipolar 450V in case of the Steerer version An important feature is the glitch free continous zero transition of the outputs if the voltage is swept through zero The same applies for the corresponding negative outputs which differ from the positive ones only by their sign of voltage 220 240V AC The 8 pairs of output lines are available on 16 BNC output connectors at the rear side of the device Apart from opposite sign the two components of all output pairs are designed to match well to each other with respect to their absolute voltage The remaining mismatch is typically better 0 02 at voltages above 125V For further detailes please refer to the specifications in chapter 7 H V Amplifier External Circuitry e g electrodes x100 b 5 positive Internal Control Voltage gt negative H V Amplifier x2. v stahl electronics com HV Series Quadrupole and Steerer Supply QUAD Steerer Manual doc 26 July 2008 User Manual Rev 1 2 HV QUAD HV Steerer Option HV USB Option DVM 16 Electronics for Science and Research Kellerweg 23 D 67582 Mettenheim Germany www stahl electronics com HV QUAD Series Installation and User Manual Rev 1 0 TABLE OF CONTENTS Eee UY tal IIL E E EEE A Sienna et ha eee ne ea pane T 2 General Information and Overview ccc cece eee eee e cece cece cece eee eee ee enenes 2l Purpose and Description of the Device ccccee eee e ee eeee 22 Functional Principle and and Block Diagram 0008 De DOVE MATIC eree E AE JMA O eeen EEEN 3 1 Mechanical and Electrical Installation 0 0c eee ee eee 3 2 Software Installation 0c cece cee cece cee eceecenceneee es SOA ASB DAV eta cecsncndtcuneeeadsiencunyagesnaeiteessqatieneansvacosudad 3 2 2 LabVIEW control program c cecceceeeeseuseceeeuees 4 Operation and Control Elements 0 cece ccc eee eee e cece enn ee eee e eee nes 4 1 Elements on the front plate ccc cece eee e eee o i a 4 2 COROIN ON AUG aarti tee A 4 3 Output Charac tenses erenn cage leita ten ek sees AT NRE 4 4 Input and Transfer Characteristics ccc cece cece eee eee e cece 4 5 Error Detect OUMU sawed oxen EA E EA 4 6 Switching the device off is sicewaseesdecateword
3. gt 00000000000 P sei eT Input Protection 15 www stahl electronics com phone 49 6242 504882 fax 49 6242 504884 HV QUAD Series Installation and User Manual Rev 1 0 The analog input lines are overvoltage protected max 20Vpc permanentely or 1 5kV ESD human body model and refer to a common reference GND Pin 13 at the 25pole connector Even though this reference Pin has galvanical connection to the metal shield GND of the housing one should use this dedicated OV reference Pin Pin 13 as reference for input and output lines and rather use the case ground for shielding purposes only Response time of the output with respect to changes at the inputs are rather determined by the HV output stages see above settling time The HV Series devices are primarily not designed for amplification of AC signals their frequency response is therefore intentionally kept low with a cutoff frequency level dependend of a few Hz Output verification lines Pins 1 8 and 14 21 of the 25 pole connector provide verification lines for remote checking of correct output operation These analog outputs provide the down scaled output voltages 1 e a factor of 100 smaller than at the rear BNC outputs Pins 14 21 account for the positive outputs Pins 1 to 8 for the negative ones Their voltages are also displayed on the front side LCD display in case the option DVM 16 is installed 4 5 Error Detect Output
4. which is zero voltage All other voltages between 0 00000 and 1 00000 are scaled linearly e g 0 75000 represents 75 of full span above minimum voltage which is 250V for a HV500 device Coding of the 16 channels bits into the control 4 bytes B3B B Bo The following encoding is used for the Check Lock and Channel on Off command The first 4 bits upper nibble of every Byte is always 0001 16 e This is in order to avoid certain bit combinations which could cause trouble to USB RS232 based communication like enter escape Next 4 bits lower nibble in B3 chl6 chl5 chl4 chl3 mB chl2 chli chl0O ch09 in By ch08 ch0O7 ch06 ch05 in Bo ch04 ch03 ch02 chOl For instance B 0001 0011 means channels 3 and 4 are off 1 and 2 are on in case of the switching command and with respect to the lock status it would mean that 3 and 4 are ok and 2 not locked Correction Command advanced users only The correction command is only used within the manufacturing process and adjusts some correction routines inside the HV series devices The format of the correction command looks like HV004 CORRO2 0 12345 0 54321 which means that the HV series device with serial number 004 is changed specially channel number 2 in this case The span correction comes first 0 12345 then the offset correction 0 54321 These both numbers represent the correction parameters The span correction r
5. 100 Output channel scheme showing one of eight output channel pairs which deliver DC output voltages at opposite sign complementary positive negative outputs but with same absolute value The output channels can deliver currents up to the internally limited values The purpose of the limitation 1s mainly to restrict currents to an amount which is minor harmful to external devices or human beings By factory a minimum guaranteed supplied current of 50uA is set the maximum value is limited by the safety circuitry to less than 80uA at full output voltage Quadrupole version or less than 200uA Steerer version respectively Before using an output channel the user should ensure the completion of external cabling as long as the channel is put to zero volts or the device is completely switched off It is not recommended to plug a high voltage cable if the high voltage is already present In case larger capacitive loads exists or an unintentional short cut to ground or to any other voltage occurs high transient electrical currents or gas discharges in air may damage the HV device severely or eventually other externally connected devices or experimental setups Always finish cabling before turning the respective output channel on 13 www stahl electronics com phone 49 6242 504882 fax 49 6242 504884 HV QUAD Series Installation and User Manual Rev 1 0 The admissible cable length standard BNC cables RG58 is 200m Longer cable
6. 4 channels available Output voltage 1kV O or 0 1kV HV 1000 8 8 channels available HV QUAD 275 16 8 pairs of unipolar complementary outputs with opposite polarity HV QUAD 0 275V or 0 450V designed for electostatic quadrupole lenses HV QUAD 450 16 HV Steerer 250 16 8 pairs of bipolar complementary outputs with opposite polarity HV Steerer HV Steerer 450 16 designed for electostatic quadrupole lenses and steerer plates AMP HV 500 similar to HV 500 16 but with analog inputs 5 www stahl electronics com phone 49 6242 504882 fax 49 6242 504884 HV QUAD Series Installation and User Manual Rev 1 0 3 Installation 3 1 Mechanical and Electrical Installation Positioning Provide sufficient air cooling of the device and loacte in normal horizontal position to allow for defined air convection Rack mounting into a standard 19 rack is as well possible as resting the device on a table If mounted in a rack please allow 2cm clearance at the top cover with respect to the next device above All 4 case vents must permanently be cleared fan inlet at rear side air outlet at rear and top side in order to prevent overheating If in doubt about the sufficiency of air ventilation provide a software readout of the internal temperature sensor for regular inspection e g every 2 minutes A temperature over 55 C indicates inadequate air ventilation Alternatively the temperature of a second sensor can be read by switching the
7. 49 6242 504884 HV QUAD Series Installation and User Manual Rev 1 0 Definition of device identifiers sent back from a device upon request by the IDN command The identifier string consists of several parts returning informations about the device Every part is separated from the next by a normal space character Example HV023 500 16 b HV 003 500 16 b That means a HV series device answers serial number is 023 voltage range 500V 16 channels and having bipolar outputs This identifier string is programmed into the FlashRom of every HV series device by factory The different string options are first string part always HV 2 part serial number between 001 and 999 3 part voltage in volts can be any integer number between and 100000 4 part number of channels presently either 4 or 8 or 16 5 part b like bipolar or u like unipolar q like quadrupole lens supply s like steerer supply Command Example for setting a voltage The command HV014 CH02 0 00000 puts channel number 2 on minimum voltage Le 500V for a HV500 device assuming the the devices serial number is 014 The command HV014 CH02 1 00000 puts channel number 2 on maximum voltage 1 e 500V for a HV500 device The command HV014 CH02 0 50000 puts channel number 2 on half span between minimum and maximum
8. There is one more BNC output at the rear side besides the HV outputs The Error Detect output provides a TTL CMOS compatible line showing a low level in case ANY output channel has a overload error condition Otherwise the output shows a high level of ca 5V 4 6 Switching the device off After switching the device off from mains supply the output voltages will assume ground potential Let at least 2 minutes pass in order to allow all voltages to fade before changing the cabling or touching any bare output line by hand It is recommended to use the rear side mains switch in order to completely separate the device from external mains supply 5 Floating Ground Option currently under development for HV Quad HV Steerer 16 www stahl electronics com phone 49 6242 504882 fax 49 6242 504884 HV QUAD Series Installation and User Manual Rev 1 0 6 Maintenance The HV Series Voltage Source is designed for years of reliable operation Under normal operating conditions it should not require electrical maintenance but routinely cleaning of dust and in longer time intervals replacement of rear fan see below If any further question should arise please contact the manufacturer Routine cleaning All ventilation openings top bottom sides and rear panel should be checked periodically and kept free of dust and other obstructions A vacuum cleaner may be used to clean these vents when the unit
9. display to the protocol mode see section 4 1 below air outlets air outlet air intake s str JAA T aR a aa i ee Keep air vents always cleared to ensure sufficient ventilation Connecting to mains power Connect the device to the mains power supply by using an appropriate power cord being properly wired and providing a grounded outlet The power cord must be suited with respect to possible load currents and should be rated to 5A current Cabling of voltage outputs Always provide appropriate and safe cabling when connecting the device to other devices or vacuum experimental setups Cabling is prefered using high voltage cable with proper shielding SHV connector cables are a suitable choice in order to ensure proper shielding against exernal noise pickup and in order to provide protective ground for safety reasons Always be aware about the potential hazard of high electrical voltages to human beings and sensitive objects of all kind see also safety hints in section 1 Please note that wiring only can be done when the device is turned off put to zero or the respective channel is brought to a high impedance state Connecting a powered up output to external circuitry can easily cause sparks and electrical discharges The resulting overvoltages can severely and permanentely damage the device itself and also external circuitry USB connection in case of option HV USB Use a standard type A B connnecti
10. driving current loads Short cuts or other heavy loads at the outputs Generally all outputs are short cut proof with respect to GND short cuts or short cuts to any voltage between the specified min max voltage Nevertheless suddenly occuring short cuts or overvoltages for instance caused by sparks or other discharges represent a considerable hazard Even though the outputs feature an internal protection circuitry based on the output resistor melting fuse inductive blocking and overvoltage drain care should be taken to avoid any possibility to create overvoltages or heavy output current loads in order to ensure a long life time Also intentional short cuts at the 14 www stahl electronics com phone 49 6242 504882 fax 49 6242 504884 HV QUAD Series Installation and User Manual Rev 1 0 outputs e g caused by high voltage semiconductor switches are not admissible In case a fast switch is placed at the output for switching purposes a series resistance in the order of 2 5kOhm at the respective output 1s recommended Recovery from Overload If a overload conditions occurs indicated by red LED light on the front plate the outputs show a hysteresis behaviour which means that the load has to be diminished to a certain amount below the overload threshold or completely removed This hysteresis is typically 10 of threshold current or a few volts with respect to voltage Allow the output overload detection circuitry severa
11. inch rack mount case User control of the device can be accomplished by PC control programs utilizing a standard USB connection USB 2 0 compatible in case of the device Option HV USB or via analog voltage inputs at the rear side 2 2 Functional Principle and Block Diagram The following picture displays the internal structure illustrates the functional principle and the typical application The output voltages are either controlled by analog input voltages or digital by personal computer PC based control In both cases analog or digital control the set values define the absolute value of a corresponding output amplifier pair The output DC voltages are calibrated within each pair in order to match to a high degree and the voltage sign of the pair components shows opposite polarity In total 16 outputs are available arranged in independend 8 pairs Regulation circuitry on all 16 output channels establishes individually the desired output DC values In case a shortcut or overcurrent conditions occurs the regulation circuitry will fall out of the lock state and the corresponding indicator LED on the right hand side of the front plate will become red Without malfunction or overload the corrsponding indicator will lighten up green again In case analog control is used an Error Detect output at the devices rear side indicates 1f any channel is not locked low voltage OV or if all channels are correctely locked h
12. program Assuming that the LabVIEW development environment in Version 8 0 or higher is available on the target PC copy the path containing the LabVIEW source code VI s from the installation CD to a proper place of your choice on a local drive By double clicking on the file Che Q Ben Doat Ghote ode Wirekw tide gt te inc tockormnron i SoBe fae Od om 7 wT HV High Voltage Series ean m swikchOFF ctl ia stop ctl a refresh ctl an id options ctl Banm ia checkLock ctl Leone CRY HV ControlPanel vi in the path ui User Interface the control panel for HV Series devices will open which can immediately be started by clicking on the ile Ed 8 www stahl electronics com phone 49 6242 504882 fax 49 6242 504884 HV QUAD Series Installation and User Manual Rev 1 0 See section 4 2 for more detailes about operating the control program In case that the LabVIEW development software in version 8 0 or higher is not available on the PC controlling the device there is a second option The so called LabVIEW run time engine can be installed from the installation CD and the application program containing the control software for the HV Series can be run subsequently In this case modifications of the control software or implementation in own programs are not possible but the completed software can be run unchanged in the version as it is Please contact manufac
13. servicing Do not block chassis ventilation Slots and openings in the chassis are provided for ventilation openings purposes to prevent overheating of the equipment and must not be restricted All 4 case vents should continously be cleared fan inlet at rear side air oulet at rear and two at top side in order to prevent overheating If mounted in a rack please allow 2cm clearance at the top cover with respect to the next device above If in doubt about the sufficiency of air ventilation provide a software readout of the internal temperature sensor for regular inspection e g every 2 minutes A temperature over 55 C indicates inadequate air ventilation Additionally a second sensor can be read out manually in the displays protocol mode see section 4 1 Beware of external magnetic fields External magnetic fields can impair damage or even destroy this device A maximum external field strength of 10mT is admissible and must never be exceeded This statement applies for static as well as alternating fields If in doubt check possible external field e g with a hall probe before switching the device on In case an external field strength of 10mT is exceeded once or permanentely the device may overheat or cause excessive power consumption Operate caryfully with respect to risk This device can produce a voltage up to 500Vpc at its of electrical shock output lines which is harmful in case of direct touch with the human body This vo
14. to the device maybe a short cut to ground or short cut to another channel or other voltage supply by external cabling 2 Too much current is drawn from the output e g because of heavy eletrical leakage currents or discharges in vacuum 3 At heavy capacitive loads several micro Farad the output takes several seconds to built up the desired voltage The LED therefore might turn red shortly before becoming green again after some seconds as soon as the desired voltage is settled 4 An internal error appeared The latter can be excluded if the LED becomes green again after removing all external cabling Please note that in case large voltage steps are programmed e g from minimal voltage to maximum value the indicator might become red for a short moment since the output value will not instantaneously coincide with the programmed value 4 2 Control Software option HV USB After starting the LabVIEW main VI oder application program the following user surface will appear which can be operated in a mostly intuitive style v HV High Voltage Series Connected Devices remesses rmes emes meen eses reas emee SS EL ESES nees mmne nnmn ena R DAAL LAA DRL A A L An High Impedance Overload Status C ho 3 500 00 y B C chore 0y CD ches 9 200 00 y CD hos 5i 200 00 y gt 2 Update List CB chosg 100 00 v C o6 t 123 56 V C B choyi 333 33 Cp o8 g O12 step size 5i 10 00 11 www stahl electron
15. 884 HV QUAD Series Installation and User Manual Rev 1 0 Found New Hardware Wizard Please choose your search and installation options ay Search for the best driver in these locations Use the check boxes below to limit or expand the default search which includes local paths and removable media The best diver found will be installed Search removable media floppy CD ROM Include this location in the search EACDM 2 00 00 v i Browse Don t search will choose the driver to install Choose this option to select the device driver from a list Windows does not guarantee that the diver you choose will be the best match for your hardware Click OK and Finish to complete the first driver installation After a few seconds the first window will show up again Found New Hardware Wizard This is because the drivers come in two separate parts which both have to be installed Go through the installation steps in the same way as before After completion the USB drivers are ready for use and Windows indicates this by showing HV Series Device Ready or similar in the lower right screen corner for a couple of seconds Windows usually recommends to restart Windows now but for immediate use of the HV Series devices one can skip this point Nevertheless the PC should be restarted at a later point and latest before installing any other piece of hardware or software 3 2 2 LabVIEW 8 0 control
16. anges from 0 00000 to 1 99999 always 5 digits after the decimal point and the offset correction ranges from 0 49999 up to 0 49999 For the offset the sign or always has to be sent es well The decimal point always must be a point and not a comma and not 20 www stahl electronics com phone 49 6242 504882 fax 49 6242 504884 HV QUAD Series Installation and User Manual Rev 1 0 DECLARATION OF CONFORMITY Manufacturer s Name Dr Stefan Stahl Electronics for Science and Research Manufacturer s Address Kellerweg 23 67582 Mettenheim Germany Declares that the product Product Name HV series voltage supply Model Number HV Quad 275 16 HV Quad 400 16 HV Steerer 500 16 HV Steerer 450 16 HV Steerer 250 16 Product Options This declaration covers all options of the above product s Conforms with the following European Directives The product herewith complies with the requirements of the 1 Low Voltage Directive 73 73 EEC 2 EMC Directive 89 336 EEC including 93 68 EEC and carries the CE Marking accordingly Date Of Issue 21 June 2008 General Director 21 www stahl electronics com phone 49 6242 504882 fax 49 6242 504884
17. ems Linux Mac OS Windows CE can be downloaded from http www ftdichip com FTDrivers htm Execute the following steps under Windows XP after automatic start of the Found New Hardware Wizard The following screen opens up Found New Hardware Wizard Welcome to the Found New Hardware Wizard Windows will search for current and updated software by looking on your computer on the hardware installation CD of on the Windows Update eb site with pour permission Read our privacy policy Can Windows connect to Windows Update to search for software Yes this tine only O Yes now and every time connect a device Click Next to continue in which you activate the last button No not this time and continue with Next In the following window choose Install from a list or specific location gt Next Found New Hardware Wizard This wizard helps you install software for EVAL232 Board USB lt gt Serial If your hardware came with an installation CD lt or Hoppy disk insert it now What do you want the wizard to do Install the software automatically Recommended Click Next to continue And afterwards you choose Search for the best driver in these locations and Include this location in the search Browse now to the Installation CD and select the appropriate path with the USB drivers 7 www stahl electronics com phone 49 6242 504882 fax 49 6242 504
18. eobesaeewaraes dedaeawaeden ae gt PO atin eS Ground OPON eeano n A EN R 6 Maintenance soc osc hinwn dais Shida wen wd bene anwen baled GOED he bak Oa be holed He Rosie RAR OR RR 2 www stahl electronics com phone 49 6242 504882 fax 49 6242 504884 ON aA BR BR AB CONN DN OO HV QUAD Series Installation and User Manual Rev 1 0 1 Safety Hints Observe all installation operation Prior to operation thoroughly review all safety installation and safety instructions and operating instructions accompanying this equipment Rear side switch turnes device If the device is not in use for a longer time it is completely off recommended to turn the mains switch at the rear side off otherwise the device will not be completely separated from the mains supply This equipment must be connected to This product is grounded through the grounding conductor of an earth safety ground the power cord To avoid electrical hazard the grounding conductor must be connected to protective earth ground Do not make electrical or mechanical modifications to this unit which are not authorized by the manufacturer Do not operate in wet damp To avoid electric shock hazard do not operate this product in conditions wet or damp conditions Protect the device from humidity or direct water contact Disconnect power before servicing To avoid electric shock hazard disconnect the main power by means of the power switch and power cord prior to any
19. he voltage controls The button On High Impedance selects if a channel is used and activated or de activated and set to zero volts Note that this option is on purpose excluded in devices with serial numbers 014001 015008 015009 015010 On High Impedance Overload Status On DD chad su y 0 Ch os 9 50 00 y O Choz 200 00 y Ch o4 i 200 00 y Chos 7 100 00 V OOE 1 PL At right hand side besides the numerical control field for the voltages the Overload Status Indicators appear They are similar to the LEDs on the front plate and indicate the status of the regulation circuitry for every channel As long as the set voltage can be held the indicator is green otherwise red Routinely once per second the control program reads the actual status over the USB bus and updates the indicator colour Nevertheless the standard preselected update rate of onc request per second could be slowed down by considerable CPU load or competing LabVIEW processes working in parallel A forced and immedeate status check is therefore provided if the user clicks on the button A Options After presseing the Options Button the user can manually read the device internal temperature in the subsequent window or enter manually commands to the HV Series device for advanced users see also the list of commands in the appendix 12 www stahl electronics com phone 49 6242 504882 fax 49 6242 504884
20. ics com phone 49 6242 504882 fax 49 6242 504884 HV QUAD Series Installation and User Manual Rev 1 0 While starting up the list of connected device upper left corner will appear and the program will list all recognized HV Series devices inside the window please note that before taking any action the user should click once to select a device for further operation LILY L Connected Devices Hvo04 8500 COM 16 Hoos te soo comia picture shows a list with two recognized devices inside the displayed list The informations about the listed devices show device serial number e g HV016 for a HV Series device with serial number 016 the number of available channels on that specific device the voltage rating e g 500V the COM port number under which the device will be accessible in Microsoft Windows from the PC Note that the USB driver on the PC will enumerate detected USB devices automatically This COM port number may vary from PC to PC and does not depend on the connected HV Series device itself If a new device is connected while the program is already running the list can be forced to be updated ey Update List by pressing the button Next right to the list of connected devices the user can set the voltages of each channel in the numerical control field either manually by entering numbers or by clicking on the up down arrows A step size can be defined in the control field underneath t
21. igh voltage 5V Fig 2 1 Analog or PC control is selectable by the user dashed line For clarity only one of 8 independend output channel pairs is shown The typical application is the supply of electrostatic quadrupole lenses with bipolar voltages 4 www stahl electronics com phone 49 6242 504882 fax 49 6242 504884 HV QUAD Series Installation and User Manual Rev 1 0 The main difference between the Quadrupole and Steerer variant lies in the fact that the output range of the Quadrupole outputs are unipolar e g 0 450V and 0 450V for one output pair but truly bipolar e g 450V 450V 450V 450V for the Steerer variant outputs The latter feature a completely continous and glitch free zero transitions no switching around 0 V which eases its application compared to other devices From serial number 015008 and higher it is possible to exchange at any later time from Quadrupole to Steerer variant by exchanging the corresponding output slots contact manufacturer in that case 2 3 Device Variety The following devices are currently members of the HV series device family HV 200 8 Output voltage 200V 200V 8 channels available Output voltage 200V 200V HV 200 16 16 channels available Output voltage 500V 500V HV 500 8 8 channels available Output voltage 500V 500V HV 500 16 16 channels available HV 1000 4 Output voltage 1kV 0 or 0 1kV HV 1000
22. ional Analog Control 25pole connector Input voltage range Nominal 0 2 5V 0 4 25V 275V Version 450V Version Overrange 0 2 75V 0 4 5V 275V Version 450V Version typical typical drift E DC Amplification factor 100 100 a Accuracy a 0 02 0 004 perda 25mV 12mV_per day Mismatch between positive and negative output voltage 0 019 125V 0 05 125V for one output pair 0 010 250V 0 03 250V 5 mVrmms S 2 2 mVrms Output verification lines e 0 02 0 05 Front Plate LCD Screen Digital Voltmeters typical 0 04 0 1V Accuracy Scale error Offset error Accuracy Scale error Offset error Storage Temperature 55C to 105C Magnetic Field max 10 mT admissible Operating Humidity amp noncondensing humidity temperatures between 10 C and 40 C Temperature AC input power 230VAC at 50Hz The power entry module is EMI RF I filtered AC Power Supply Fuse medium fast blow 2 5A Typical Power Consumption 60W 19 00 wide x 10 deep Front panel mounting holes are configured for M6 rack configurations approximately 4 9kg configuration dependent 18 www stahl electronics com phone 49 6242 504882 fax 49 6242 504884 Case dimensions HV QUAD Series Installation and User Manual Rev 1 0 Appendix Personal Computer VA gt List and Description of communication commands The following commands are sent received in order
23. is powered off Do not use compressed air to clear the vents The front panel may be cleaned periodically with a clean cloth and alcohol solution when the unit is powered off It is recommended to send the device to the manufacturer routinely in 2 year intervals for internal cleaning from dust Visual inspection of the degree of internal pollution and accumulated dirt is possible but should be carried out by qulified personnel only In this case wait at least Smin after switching power off and disconnecting all external high voltage lines and the mains cable After removing the 6 screws of the upper lid the latter is removable and allows a look on the internal electronics boards Very careful cleaning by qualified personnel and using a small miniature vacuum cleaner is admissible Before continuing operation ensure that the lid is placed correctely orientation with respect to rearside frontside and that all 6 lid screws are placed and tighened again In any doubt of possible internal damage contact manufacturer before continuing any further operation Calibration Under normal operating conditions the HV Series Voltage Source will not require regular calibration However it can be returned to factory for complete electrical and mechanical inspection and calibration purposes Also if required an certificate can be issued for traceability Contact manufacturer for additional information Fan life time and temperature monitoring The venti
24. l seconds to pass before indicating green light after the overload condition was removed 4 4 Input and Transfer Characteristics analog inputs In case electrical analog control input lines are used they will control the output voltages in the sense of linear DC amplification For this purpose a male 25pole Sub D connector is provided at the rear side of the device with eight DC voltage input lines with a nominal range of OV 2 75V or OV 4 50V respectively which are buffered by high impedance input amplifiers t eseeeeeeed 220 240 AC Position of 25pole analog I O connector at rear side Output Verification Lines Input Control Lines ch8 ch7 du ch4 ch3 ch2 chi ch8 ch6 on fon Ref GND POOOOODOOODOO e GoD RE pn Shield GND ch4 ch2 ch3 ch4 ch5 ch6 ch7 ch8 ch7 ch5 ch3 cht Pinout of 25pole Sub D connector The metal collar should be used for shielding purposes whereas the Ref GND Pin represents the reference mass for the analog input and outputs These input voltages are subsequently amplified by precision high voltage amplifiers by a factor of 100 or 100 for the positive or negative outputs respectively The two components of all output voltage pairs match well to each other with respect to their absolute voltage The remaining mismatch is typically better 0 02 at voltages above 125V typically 0 01 at a voltage of 250V x100 G r h ch ch4 ch Ref GND O000000000000 Nay ee input
25. lation fan at the rear side of the housing is a part which shows deterioration in time Exchange of this part is recommended after latest 50 000 hours of operation Please contact manufacturer for replacement after long term operation Complete failure might lead to overheating of the device Several temperature fuses and other protection measures ensure safety against fire hazard in this case Nevertheless it is strongly recommended to read out regulary the devices temperature by software means in order to monitor the devices internal temperature and therefore to ensure avoidance of damage to the device In the protocol mode of the front display the user can also visually check the internal temperature Values above 65 degrees Celsius are not admissible values above 55 degree Celsius indicate a possible problem A warning sounder beeper will activate in case of low fan rotational speed applies for versions from manufacturing date 12 2010 and later Fire hazard Please note that excessive accumulation of dust inside the case of the device can lead to overheating This together with possible discharges increases the risk of fire caused by electrical sparks Routinely cleaning the device from dust minimizes this risk It is therefore recommended to send the device to the manufacturer routinely in 2 year intervals for internal cleaning from dust or to have it cleaned by an accordingly qualified electronical workshop Ambient air con
26. lements 4 1 Elements on the front plate Voltage Supply HV QUAD 275 16 o ss t a sss x HG 2 mains supply switch LCD display LED indicators Power On LED The front plate contains several control elements for the device The device is powered up after turning on the rear side mains supply switch and also the power button on the front plate A warning beeper will temporarily sound which is used for ventilation fan monitoring The Power on LED green indicates proper operation of the internal 24V circuitry If the device is not in use it is recommended to use the rear side mains switch to cut it completely off from mains supply This is recommended in oder to minimize small supply currents which flow when the the rear side switch is kept on and also for safety reasons e g overvoltages occasionally occuring on the mains supply line The LCD display on the front side has several functions In PC controlled mode option HV USB it shows informations about received commands and the latest voltage settings for the output channels It can be run in two modes In the Protocol Mode all commands which are received via the USB connection are listed subsequently one after another Also the devices internal temperature is shown regardless if the option remote control option HV USB is used In the Voltage Mode all programmed voltages are listed sorted by channels The display modes are toggled by pressing
27. ltage may be even exceeded in case an internal failure occurs Care must be taken to avoid unintentional touching of any output line by the human body or any devices which might be endangered by high voltages Routinely cleaning from dust After long operation or operation in a dusty environment it is strongly recommended to have the internal parts of the device cleaned by the manufacturer or an appropriately qualified workshop in order to ensure proper operation and reduce the hazard of overheating No outdoor operation Outdoor operation of the device is not admissible 3 www stahl electronics com phone 49 6242 504882 fax 49 6242 504884 HV QUAD Series Installation and User Manual Rev 1 0 2 General Information and Overview 2 1 Purpose and Description of the Device Purpose of the HV QUAD Steerer series devices is the supply of stable DC voltage from OV to 275V optionally up to 450V for electrostatic lenses especially Quadrupole Lenses Steerer Deflector Plates and Ion Traps Unlike DC power supplies the outputs currents are limited to small values and the outputs are optimized for short and long term stability low ripple low noise and low temperature drift Eight input channel are provided each controls internally two output channels which are complementary Every pair of output channels has the same absolute value of voltage but opposite output polarity The device is housed in a standard 19
28. om Observations to device device Identify HVOO1 The device replies with its name and serial number Set voltage DDDDD CHXX CHXX Y YYYYY XX is the channel number 01 up to 16 Y YYYYY Y YYYYY is a decimal number between 0 and 1 which represents the scaled voltage 0 represents the minimum voltage e g SOOV 1 the maximum value e g 500V 5 digits after the comma have to be provided Read DDDD TEMP XX X C XX X 1s the temperature in C temperature Check lock DDDDD LOCK Probes all channels to see if any is unlocked The status of all response is coded into 4 bytes B to Bo see also channels appendix 3 If a Bit is zero then locking is ok if 1 then a problem occurred in the respective channel Turn On Off DDDDD Turns certain channels on or to zero Coding see individual SWITCH below 1 means on 0 means off outputs Note that this command is NOT used in the Steerer Quadrupole Versions of HV Series devices Send string DDDDD DIS Sends a string arbitrary chain of characters max to LCD string 16 characters long to be displayed on the front LCD display display The string will be visibe in the protocol mode For format see appendix 2 Set DDDDD CORR correction parameters Change of correction parameter in a dedicated LabVIEW control or coded as shown below For adjustment during manufacturing process only 19 www stahl electronics com phone 49 6242 504882 fax
29. on cable USB 2 0 standard to connect the device to the control computer After connecting to a PC under Windows XP the Found New Hardware Wizard should open see next section for detailed description regardless if the HV Series device is already switched on or not since the corresponding receiver inside the HV Series device is powered by the USB bus itself and therefore autonomous Cable length can be prolongated using an appropriate USB hub or repeater 3 2 Software installation Option HV USB 3 2 1 USB Driver The HV Series devices use the USB bus for connecting to a control PC After proper cabling of the USB connection see section before the Found New Hardware Wizard under Windows XP should open up Depending on the Windows XP version allow a few seconds to automatically identify the connected device and install drivers or follow the described steps below The automatic or manual 6 www stahl electronics com phone 49 6242 504882 fax 49 6242 504884 HV QUAD Series Installation and User Manual Rev 1 0 installation will install the USB CDM drivers from FTDI Ltd which is the manufacturer of the USB bus interface circuitry The supplied installation CD provides suitable drivers for operation under Windows XP In case FTDI drivers are already installed a de installation is recommended before a new re installation with the latest diver version Latest drivers also for different other operating syst
30. s are possible but their capacitive load on the outputs has to be considered see remark below under settling time Using very long cables of 1 km or more is not recommended because of possible excessive noise pickup and sensitivity to capture 50 or 60 Hz hum either capacitively or inductively Resolution If controlled by the USB bus the outputs feature a stable setting of voltages with typically 15 milliVolts resolution corresponding to an internal resolution of 16 Bits or few milliVolts offset and less than 0 1 scaling error in case the analog input is used see specifications in chapter 7 for more detailes Every output is equipped with a correction loop which ensures low voltage fluctuations and very good short term stability in order of a few ppm only with respect to output span Settling time The outputs voltage settling time depends on the external load and is generally limited by the maximum internal voltage slope of roughly 2500V sec In high accuracy applications allow up to 5s to settle the outmost 100ppm accuracy For small voltage step sizes lt 10V the settling time to reach 0 1 accuracy is less than Is typically Nevertheless factory settings can be adapted to achieve faster response time or in contrast longer response time and greater stability on heavy capacitive loads like very long output cables The figure of settling time of any high voltage amplifier always represents a trade off between current dri
31. taining oil mists e g proximity to a vacuum forepump or mechanical machines places a severe danger since enflammable substances could enter the device through the ventilation holes and cause fire If in doubt regular cleaning by a qualified electronical workshop or the manufacturer is strongly recommended 17 www stahl electronics com phone 49 6242 504882 fax 49 6242 504884 HV QUAD Series Installation and User Manual Rev 1 0 Ti Specifications Parameter Output unipolar 0 275 V and 0 275 V up to 250 V nominal range above overrange unipolar 0 450 V and 0 450 V up to 425 V nominal range above overrange BNC 50 pA guaranteed max 400 pA All outputs share a common GND which is identical to the shield of the BNC connectors HV Quad 275 Voltage Range HV Quad 450 Output Connectors Per output Per device Current Output Reference Ground Remote Control USB 2 0 compatible connection to PCs via USB Galvanic isolation is provided option HV USB Free LabVIEW 8 0 based user surface and driver routines 25pole Sub D connector provides analog input lines which are scaled up bya factor of 100 or 100 Reference ground is not galvanically isolated from case ground Remote Control via analog voltages USB control typical drift of Setting Related to full 0 015 0 05 0 002 per day span 100mV 10mV per da Ripple p 5myms S Noise 0 10kHz o o 15Vms Opt
32. the LCD display key on the front plate In case the option DVM 16 is used all 16 output voltages on the rear side output lines are internally measured and displayed at the right hand side of the display at an update rate of roughly 1 sec Please note that the indicated voltages are displayed with a much coarser precision than the corresponding output voltages are defined see also specifications in section 7 The LCD display goes into into power save mode after roughly 60 min Any press on the LCD display key reactivates the backlight again By toggling to the Protocol Mode the serial number and the number of the virtual COM port under which the device is accessible from the PC user surface can be seen as Soon as communication with the controlling PC is established Picture of LCD display in Voltage Mode 10 www stahl electronics com phone 49 6242 504882 fax 49 6242 504884 HV QUAD Series Installation and User Manual Rev 1 0 The LED indicators on the right hand side of the device show the overload status of the individual output channels No light internal malfunction channel not operational Green Light status ok no overload Red Light overload or error condition A LED will become red when the programmed voltage setting cannot be held correctely at the respective output at the rear side This can have several reasons The most common are l There is a problem with the external circuitry which is attached
33. to communicate between the HV Series voltage source and a control device like a standard PC The commands are sent in clear ASCII text strings over a standard USB connection 1 0 protocol but also 2 0 compatible In case LabVIEW Version 8 0 or higher is used a complete driver program with open source SubVI s is provided by the manufacturer Self written programs or other commercial software can use the command structure described in the following section as well Establishing connection and sending commands Before sending any command the USB connection to the device has to be established This is done by installing an appropriate USB driver Drivers for Windows 2000 ME XP Vista Mac OS and Linux are provided Please contact manufacturer or see the USB manufacturers homepage www ftdichip com for latest updates The following table lists the available commands The abbreviation DDDDD stands for the name of the device including its serial number e g HV009 means HV device with serial number 009 All commands must be terminated with an ENTER 13 in ASCII code After establishing the USB link to the HV device and turning it on the IDN identifier should be sent in order to retrieve the serial number since it will be used to adress the device Subsequently the devices voltages can be set according to the table below Please see also examples and more detailes after the table Command String to be sent Received fr
34. turer for more detailes and possibilities in case changes of the program are desired To install run the LabVIEW Runtime Installer Wizard and follow the instructions J NI LabVIEW 8 2 Runtime Engine NI LabVIEW 8 2 Runtime Engine Exit all programs before running this Setup Lab IEW SAR ontimeen crt Disabling virus scanning utilities may improve installation speed This program is subject to the accompanying License Agreement s RuntimeEngine File Icon You will be requested to choose ta LabVIEW 8 20 an installation directory and 20th Anniversary Edition location for unzipping the required files Furthermore in case not installed before the National Instruments VISA drivers need to be sE NI VISA 4 3 Runtime NI VISA 4 3 Runtime Exit all applications before running this installer Disabling virus scanning applications may improve installation speed This program is subject to the accompanying License Agreement s NI VISA installed which enable the National Instruments VISA Software LabVIEW software access to the PCs hardware resources After completion of these two installations the HV Series aicom vies control program can be run as fF 5 e executable file Wisats0runtime exe RuntimeEngine File Icon 9 www stahl electronics com phone 49 6242 504882 fax 49 6242 504884 HV QUAD Series Installation and User Manual Rev 1 0 4 Operation and Control E
35. ving load capability precision and maximum capacitve or resitive load Eventually contact manufacturer for optimization of the settling time characteristics of an individual device in order to suit it to a certain external setup Output accuracy fluctuations and loads Precision components ensure a very good basic accuracy and very low long term drift both on a 107 level A PID regulation loop on every individual output ensures remarkable stability and compensates for short term temperature depending or semiconductor inherent fluctuations Intrinsic short term stability is therefore on the level of Millivolts corresponding to only a few ppm s part per million with respect to the full voltage span For detailes about 24h fluctuations see technical data in section 7 All outputs feature protection resistors of 2 7 kOhms serially to the internal output amplifiers which will cause a voltage drop as soon as current is drawn from any output Please take into account that voltage drop according to Ohms law for operation with considerable load currents or for high precision measurements Note that also Digital Multimeters draw a considerable current E g 250V 10MOhms 25uA is drawn from a multimeter with 10 MOhm input resistance Loading the outputs with considerable currents should be avoided if best possible precision and stability is required since the device is rather optimized for low current applications like electrostatical lenses than
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