Technical Information Manual
Contents
1. POLARITY NEGATIVE POLARITY TRANSFORMER Fig 2 5 Mod N472 polarity selection one channel Filename N472_REV2 DOC Number of pages 13 Page 11 Document type Title Revision date Revision User s Manual MUT N472 4 Ch 6kV 1 mA 3kV 3mA Power Supply 16 10 2005 2 3 OPERATING MODES 3 1 GENERAL INFORMATION Each module consists of four High Voltage channels each channel is able to supply an output Voltage from 0 up to 6 kV 1 mA The User can change the polarity of the desired channels by following the simple instructions in the following Section The selected channel polarity is shown by the relevant LEDs on the front panel 3 2 POLARITY SELECTION The Model N472 allows the User to select the High Voltage polarity with simple operations that are detailed in this Section Note that the polarity is indicated by two LEDs for each channel on the front panel 1 In order to change polarity switch off the unit remove the Mains plug and all the High Voltage cables and wait for the complete discharge of the capacitors then remove the side covers thereby making access to the Printed Circuit Boards WARNING Any attempt to operate inside the Module without turning OFF unplugging all plugs and cables and waiting for 5 minutes can be lethal 2 Lay down the unit NIM crate connector on the right and the front panel on the left and refer to Fig 2 3 The High Voltage block houses two of the four multiplier2. is ON Filename Number of pages Page N472 REV2 DOC 13 12 Document type Title Revision date Revision User s Manual MUT N472 4 Ch 6kV 1 mA 3kV 3mA Power Supply 16 10 2005 2 B If 110 V or 220 V power is selected the module needs appropriate cooling To set manually a certain output Voltage on a channel the User should turn the VSET trimmer for that channel a clockwise turn increases the Voltage an anti clockwise turn decreases the Voltage setting The relevant test point provides a Voltage proportional to the output Voltage at the rate of 1 V kV i e if the test point shows a 2 9 V level the output Voltage will be 2 9 kV The output Voltage can also be set remotely via a front panel connector RVSET an input Voltage on this connector will result in an output Voltage at the rate of 1 kV V with the chosen polarity In this case the trimmer VSET should be turned completely anti clockwise for a completely remote setting In fact the output High Voltage setting depends on the algebraic sum of the VSET setting from 0 to 6 V and the RVSET input Voltage from 6 to 6 V at the rate of 1 kV V This sum MUST in any case be positive N B the RVSET connector has a 100 kOhm impedance so for correct H V setting the input Voltage must be provided to this connector with a low impedance generator To set manually a certain maximum output Voltage on a channel the User should turn the MXVSET trimmer for that chan
3. via analog signals into a front panel connector The setting of the output maximum Voltages and Currents can be done only locally via front panel trimmers Each channel can be switched ON or OFF via front panel switches and can be switched ON remotely via a TTL low level or a short circuit connection to Ground in the relevant connectors RON The H V output enable is in common for all channels and can be done via a front panel switch or via a TTL low level in the relevant connector DISABLE This feature allows to disable the High Voltage output also if the cable providing the TTL level is removed A STATUS connector for each channel provides a short circuit type flag in case of Voltages or Currents that reach the maximum set The module can be powered on either by the NIM crate or with 110 or 220 V AC via a back panel Standard European connector N B If 110 V or 220 V power is selected the module needs appropriate cooling Its wide range of Current and Voltage along with a simple operation and monitoring make it very useful for powering the full spectrum of detectors used in the modern Physical research such as photomultipliers PMs wire chambers streamer tubes and so on The module is flexible enough to be adequate both for the lab tests where simple manual operation of a limited number of channels is often required and for a small experimental setup The following are the standard Factory settings for the present module
4. Channel Polarity Negative MXVSET Trimmer 6 kV 6 V test point readout ISET Trimmer 1 mA 1 V test point readout VSET Trimmer 0 kV 0 V test point readout Filename Number of pages Page N472 REV2 DOC 13 4 Document type Title Revision date Revision User s Manual MUT N472 4 Ch 6kV 1 mA 3kV 3mA Power Supply 16 10 2005 2 2 SPECIFICATIONS 2 1 EXTERNAL COMPONENTS CONNECTORS No 1 DISABLE LEMO 00 type Connector for the High Voltage outputs ENABLE signal No 4 RON LEMO 00 type one per channel Connectors for the REMOTE ON of each channel No 4 RVSET LEMO 00 type one per channel Connectors for the remote Voltage setting for each channel No 4 IMON VMON LEMO self locking round multipin ERA 0S 302 CNL type one per channel Connectors for the Voltage and Current monitoring for each channel No 4 STATUS LEMO self locking round multipin ERA 0S 302 CNL type one per channel Connectors for the status monitoring for each channel No 4 1 to 4 High Voltage SHV R317 580 type Back panel connectors for the High Voltage output channels No 1 Standard European Socket with RF Filter and Fuse for the Mains power supply DISPLAYS No 1 POWER ON red LED It lights up when the Main Power is ON No 1 DISABLE red LED It lights up when the H V output is disabled No 4 ON red LEDs one per channel Light up when a H V channel is ON No 4 POLARI
5. E VOLTAGE SETTING POWER ON Number of pages Page 13 8 Document type User s Manual MUT Title CHANNEL OUTPUTS NIM CONNECTOR Filename N472_REV2 DOC N472 4 Ch 6kV 1 mA 3kV 3mA Power Supply Revision 2 Revision date 16 10 2005 MAINS SOCKET AND FUSE 5 INPUT POWER 220AC 4 POWER SUPPLY 220 24 0 440 SELECTOR Fig 2 2 Mod N472 Back Panel Number of pages 13 Page Document type Title Revision date Revision User s Manual MUT N472 4 Ch 6kV 1 mA 3kV 3mA Power Supply 16 10 2005 2 ies ur CHANNEL 3 CHANNEL 1 Fig 2 3 Mod N472 components locations left side CHANNEL 2 CHANNEL 4 Fig 2 4 Mod N472 components locations right side Filename Number of pages Page N472_REV2 DOC 13 10 Document type User s Manual MUT Title Revision date Revision N472 4 Ch 6kV 1 mA 3kV 3mA Power Supply 16 10 2005 2 fo _ POSITIVE
6. LARITY SELECTION geen rtt e astris 12 33 FRONT PANEL SETTINGS co ttt eb a etie e e eret Le de TRIER ERREUR 12 LIST OF FIGURES FIG 2 1 72 FRONT PANEL detener rior ere er caeatieecescnveedesticdess 8 FIG 2 2 MODzIN472 BACK PANEL e net enu E ep EB 9 FIG 2 3 MOD N472 COMPONENTS LOCATIONS LEFT SIDE 10 FIG 2 4 MOD N472 COMPONENTS LOCATIONS RIGHT SIDE 10 FIG 2 5 MOD N472 POLARITY SELECTION ONE enne enne tenete niente nennen nnne nnns 11 Document type Title Revision date Revision User s Manual MUT N472 4 Ch 6kV 1 mA 3kV 3mA Power Supply 16 10 2005 2 1 DESCRIPTION 1 1 FUNCTIONAL DESCRIPTION The CAEN Model N472 is a 4 CHANNEL HIGH VOLTAGE POWER SUPPLY housed in a 2 unit wide NIM module Each module consists of four High Voltage channels each channel is able to supply an output Voltage from 0 up to 3 kV 3 mA or up to 6 kV 1 mA The User can change the polarity of the desired channels by following the simple instructions in paragraph 3 2 The selected channel polarity is shown by the relevant LEDs on the front panel All channels have individual settings and feature test points and a connector for the individual monitoring of Voltages and Currents The setting of the output Voltages can be done locally via front panel trimmers or remotely
7. TY green LEDs one per channel Light up when a H V channel is in Positive polarity No 4 POLARITY yellow LEDs one per channel Light up when a H V channel is in Negative polarity No 4 MXVSET red LEDs one per channel Light up when a H V channel output reaches the maximum Voltage setting No 4 ISET red LEDs one per channel Light up when a H V channel output reaches the maximum Current setting No 4 STATUS red LEDs one per channel Light up when a H V channel output reaches the maximum Current or Voltage setting Filename Number of pages Page N472 REV2 DOC 13 Document type Title Revision date Revision User s Manual MUT N472 4 Ch 6kV 1 mA 3kV 3mA Power Supply 16 10 2005 2 SWITCHES TRIMMERS TEST POINTS No 1 POWER ON Lever switch to power ON the module No 1 DISABLE Lever switch to enable the H V output on all channels No 4 ON OFF Lever switches one per channel to switch ON each H V channel No 4 MXVSET Trimmers per channel for the Maximum Voltage setting No 4 ISET Trimmers one per channel for the Maximum Current setting No 4 VSET Trimmers one per channel for the Local Operating Voltage setting No 4 MXVSET Test points one per channel for the Maximum Voltage monitoring No 4 ISET Test points one per channel for the Maximum Current monitoring No 4 VSET Test points one per channe
8. Technical Information Manual Revision n 2 17 October 2005 MOD N472 4 CH HIGH VOLTAGE POWER SUPPLY MANUAL REV 2 CAEN will repair or replace any product within the guarantee period if the Guarantor declares that the product is defective due to workmanship or materials and has not been caused by mishandling negligence on behalf of the User accident or any abnormal conditions or operations CAEN declines all responsibility for damages or injuries caused by an improper use of the Modules due to negligence on behalf of the User It is strongly recommended to read thoroughly the CAEN User s Manual before any kind of operation CAEN reserves the right to change partially or entirely the contents of this Manual at any time and without giving any notice CAEN TABLE OF CONTENTS 1 DESCRIPTION 4 1 1 FUNCTIONAL DESCRIPTION eee ete ee nee eee cedes 4 PMUUO 5 2 1 EXTERNAL COMPONENTS er cR EU RIETI e DERE CE E COR d 5 2 2 INTERNAL COMPONENTS ertet ttr tritt eri prp rd He ree eire eas 6 2 3 POWER REQUIREMENTS ir Eee det t dees b ri Ie E EU A LG tees 6 24 CHARACTERISTICS OF THE SIGNALS nee rennen tenente nennen nne 6 2 5 GENERAL ettet rite p de a pe I pt eE usE 7 MOMrn 12 3 1 GENERAL INFORMATION e eet o nie ree oae o bebes 12 3 27 PO
9. able the High Voltage output also if the cable providing the TTL level is removed A front panel connector IMON VMON provides for each channel two monitoring Voltages positive or negative according to the polarity of the channel proportional respectively to the output Voltage 1 V kV and to the output Current 1 V mA A front panel connector and relevant LED STATUS provides for each channel a short circuit between the two contacts of the connector in case of proper functioning of the channel LED is NOT lit The short circuit is opened to flag the occurrence of an overvoltage or an overcurrent LED is lit Filename Number of pages Page N472 REV2 DOC 13 13
10. at full load 3 kV 3mA Ripple NIM supply lt 80 mV pp at full load 6 kV 1mA Ripple Mains supply 3150 mV pp at full load 3 kV 3mA MONITOR OUTPUTS VMON accuracy 1 from 10 to 90 of Full Scale Range IMON accuracy 2 from 10 to 90 of Full Scale Range MXVSET accuracy 1 from 10 to 90 of Full Scale Range 2 5 GENERAL Max Delivered Power 9 Watt per channel Humidity range 0 80 Operating temperature 0 45 Weight 2 1 Kg Filename Number of pages Page N472_REV2 DOC 13 7 Document type User s Manual MUT Title MAXIMUM VOLTAGE N472 4 Ch 6kV 1 mA 3kV 3mA Power Supply m TME 4 HV POWER SUPPLY Mod N472 SETTING POLARITY ON e e MAXIMUM CURRENT meee SETTING 4 oe VMON 1 ISET MANUAL VOLTAGE o o S ETTI N G STATUS RVSET RON POLARITY ON STATUS Ovens i o m on 2 ISET 2 oo MAXIMUM VOLTAGE nde STATUS RVSET RON TEST POINT ro E 2 MXVSET T E MAXIMUM CURRENT TEST POINT den Am 3 OFF A o o OPERATING VOLTAGE oc STATUS RVSET RON TEST POINT UE 9 wxvset T z ge 4 ISET see TOME OUTPUTS ENABLE NOES STATUS RVSET RON 0 09 GROUND GND DISABLE POWER ON TEST POINT Fig 2 1 Mod N472 Front Panel Filename N472_REV2 DOC Revision date Revision 16 10 2005 2 REMOTE VOLTAGE AND CURRENT MONITOR CHANNEL ON REMOTE CHANNEL ON REMOT
11. l for the Local Operating Voltage monitoring No 1 GND Test point for the Ground reference 2 2 INTERNAL COMPONENTS JUMPERS No 1 220 110 NIM 4 pin jumper selector for the module s Main Power selection 2 3 POWER REQUIREMENTS 220V 0 6A 110 V 1 2A 24 V 1 6 24 1 6 2 4 CHARACTERISTICS OF THE SIGNALS INPUTS DISABLE TTL level active low Works only when the DISABLE switch is in its leftmost position Filename Number of pages Page N472_REV2 DOC 13 Document type Title Revision date Revision User s Manual MUT N472 4 Ch 6kV 1 mA 3kV 3mA Power Supply 16 10 2005 2 RON TTL level active low RVSET Voltage level 6 to 6 V 1 kV V setting 100 kOhm impedance OUTPUTS VMON Voltage level 0 to 6 V 1 V kV readout same polarity as channel IMON Voltage level 0 to 3 V 1 V mA readout same polarity as channel VSET Test Point Voltage level 0 to 6 V 1 V kV readout positive polarity ISET Test Point Voltage level 0 to 3 V 1 V mA readout positive polarity MXVSET Test Point Voltage level 0 to 6 V 1 V kV readout positive polarity STATUS Short Circuit when not active HIGH VOLTAGE OUTPUTS High Voltage range 0 6 kV 1 mA 0 3 kV 3 mA maximum output Current Polarity positive or negative User selectable as described in section 3 2 HV accuracy 1 from 10 to 90 of Full Scale Range Ripple NIM supply x30 mV pp
12. nel a clockwise turn increases the maximum Voltage an anti clockwise turn decreases the maximum Voltage setting The relevant test point provides a Voltage proportional to the output maximum Voltage at the rate of 1 V kV To set manually a certain maximum output Current on a channel the User should turn the ISET trimmer for that channel a clockwise turn increases the maximum Current an anti clockwise turn decreases the maximum Current setting The relevant test point provides a Voltage proportional to the output maximum Current at the rate of 1 V mA After the User has set the chosen operating parameters He She can switch ON the desired channel with the front panel ON OFF switch Each channel can also be switched ON remotely by means of a TTL low level or a short circuit to Ground into the RON connector for that channel This feature allows to disable the High Voltage output also if the cable providing the TTL level is removed N B In order to obtain a High Voltage output the RON connector MUST be shorted to GROUND e g with a 50 Ohm termination otherwise no output will be obtained The High Voltage output enable is in common for all channels and can be done either locally via a front panel DISABLE lever switch in the rightmost position or remotely by means of a TTL low level or a short circuit to ground into the contacts of the DISABLE connector lever Switch in the leftmost position Also this feature allows to dis
13. s of the channels CH3 and CH1 and bears a High Voltage Danger label The cover of each multiplier is fixed to the base through two screws remove the screws and the cover The multiplier will appear as shown in Fig 2 3 for the polarity selection of channels CH2 and CH4 lay down the unit NIM crate connector on the left and the front panel on the right as in Fig 2 4 and follow the instructions hereafter The multiplier base is accessible to the User The front panel POLARITY LEDs indicate the correct polarity for each channel Remove the multiplier base rotate it by 180 and insert it back in its position 3 Configure the unit to satisfy your requirements if desired it is possible to mix positive and negative channels in the same unit If the polarity of one or more channels must be changed extract the base from its contacts and insert it in the opposite position 4 Reassemble the unit 3 3 FRONT PANEL SETTINGS The module can be powered on either by the NIM crate or with 110 or 220 V AC via a back panel Standard European connector The Mains supply selection can be done by means of a 10 pin jumper located on the internal side of the back panel this jumper can be accessed by removing the side cover A window in the back panel shows the selected power supply Once the User has selected the desired polarity of the channels and the Mains supply the module can be powered ON via the POWER ON switch A red LED will be lit when the Power
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