CAEN N472
Contents
1. MONITOR OUTPUTS VMON accuracy t 196 from 10 to 90 of Full Scale Range IMON accuracy 2 from 10 to 90 of Full Scale Range MXVSET accuracy 1 from 1096 to 90 of Full Scale Range 2 5 GENERAL Max Delivered Power 9 Watt per channel Humidity range 0 80 Operating temperature 0 45 C Weight 2 1 Kg CAEN MAXIMUM VOLTAGE SETTING MAXIMUM CURRENT SETTING MANUAL VOLTAGE 07 02 00 4 HV POWER SUPPLY Mod N472 o N we SETTING STATUS MAXIMUM VOLTAGE TEST POINT MAXIMUM CURRENT TEST POINT OPERATING VOLTAGE TEST POINT OUTPUTS ENABLE 29 90 GROUND TEST POINT 2 C C STATUS RVSET POLARITY a IMON VMON ISET 2 VSET 29 P w STATUS RVSET RON POLARITY ON STATUS RVSET RON POLARITY ON MXVSET H 4 OFF RON DISABLE POWER ON 0 Fig 2 1 Mod N472 Front Panel 72 User s Manual REMOTE VOLTAGE AND CURRENT MONITOR CHANNEL ON REMOTE CHANNEL ON REMOTE VOLTAGE SETTING POWER CAEN 07 02 00 N472 User s Manual lt MAINS SOCKET AND FUSE CHANNEL OUTPUTS INPUT POWER 220 4 POWER SUPPLY 220 TA SELECTOR CONNECTOR gt2. 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 multipliers 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
3. 4 VSET Test points one per channel for the Local Operating Voltage monitoring No 1 GND Test point for the Ground reference 2 2 INTERNAL COMPONENTS JUMPERS 1 220 110 NIM 4 pin jumper selector for the module s Main Power selection 2 3 POWER REQUIREMENTS 220 V 0 6 110 V 1 2 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 RON TTL level active low RVSET Voltage level 6 to 6 V 1 kV V setting 100 impedance CAEN 07 02 00 N472 User s Manual 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 mA maximum output Current Polarity positive or negative User selectable as described in section 3 2 HV accuracy t 196 from 1096 to 9096 of Full Scale Range Ripple supply lt 30 mV pp at full load 3 kV Ripple Mains supply lt 150 mV pp at full load 3 kV 3mA
4. Fig 2 2 Mod 472 Back Panel CAEN 07 02 00 N472 User s Manual A 7 i y Q O Qe f e d EN A 7 Noy CHANNEL 3 1 Fig 2 3 Mod 472 components locations left side 5 gt gt 2 4 Fig 2 4 Mod 472 components locations right side CAEN 07 02 00 N472 User s Manual 54 N 3 POSITIVE POLARITY NEGATIVE POLARITY 4 TRANSFORMER Fig 2 5 Mod 472 polarity selection one channel CAEN 07 02 00 N472 User s Manual 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
5. CAEN 7 2 2000 TABLE OF CONTENTS TABLE OF CONTENTS LIST OF FIGURES 1 DESCRIPTION e rarasane des 1 1 FUNCTIONAL DESCRIPTION 2 SPECIFIGATIONS rne tein 2 1 EXTERNAL COMPONENTS 2 2 INTERNAL COMPONENTS 2 8 POWER REQUIREMENTS 2 4 CHARACTERISTICS OF THE SIGNALS 2 5 GENERAL ec eee ess 3 OPERATING 3 1 GENERAL INFORMATION 3 2 POLARITY SELECTION 3 3 FRONT PANEL SETTINGS LIST OF FIGURES Fig 2 1 Mod 472 Front Fig 2 2 Mod N472 Back Fig 2 3 Mod 472 components locations left side Fig 2 4 Mod 472 components locations right side Fig 2 5 Mod 472 polarity selection one channel 72 User s Manual CAEN 7 2 2000 N472 User s Manual The following are the standard Factory settings for the present module Channel Polarity MXVSET Trimmer ISET Trimmer VSET Trimmer Negative 6 kV 6 V test point readout 1 mA 1 V test point readout kV 0 V test point readout CAEN 07 02 00 N472 User s Manual 1 DESCRIPTION 1 1 FUNCTIONAL DESCRIPTION The CAEN Model N472 is 4 CHANNEL HIGH VOLTAGE POWER SUPPLY housed in a 2 unit wide NIM module Each
6. 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 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 disable 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 10 CAEN 07 02 00 N472 User s Manual
7. ected 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 CAEN 07 02 00 N472 User s Manual 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 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 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 red LED It lights up when the Main Power
8. 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 is ON CAEN 07 02 00 N472 User s Manual N 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
9. is 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 POLARITY 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 CAEN 07 02 00 N472 User s Manual SWITCHES TRIMMERS TEST POINTS No 1 POWER 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 one 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
10. 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 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 sel
11. 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 the RVSET connector has 100 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 channel 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
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