Model 556H High Voltage Power Supply Operating and
Contents
1. on the package to ensure prompt attention when it reaches the factory2. the front panel The indicator lamp next to the switch will light to show that input power is being applied The indicating meter at the top of the front panel will also indicate the polarity and amplitude of either the 556H output voltage or lad current depending on the setting of the meter switch 3 3 CONNECTING AN EXTERNAL REFERENCE INPUT The 556H output voltage level can be controlled by an external reference level that is furnished through the rear panel BNC connector when the Control locking toggle switch is set at Ext The range of input voltage is O to 6 9 V to provide an output from 0 to 3000 V The front panel voltage level controls are ineffective for external reference operation For positive output the polarity selector switch on the rear panel is set at Pos And the external reference should be positive For negative output the polarity switch is set at Neg and the external reference should be negative The external reference voltage should be stable and filtered since the output is linearly proportional to the reference The external reference should be capable of driving the 45 kQ input impedance 4 CORRECTIVE MAINTENANCE 4 1 GENERAL The 556H should not require maintenance other than cleaning to prevent leakage paths from being created by dust collection If an apparent malfunction is noted It is important to determine if it is within the 556H power supply by disconnecting it from its load and performing routi
3. ATION iri aeee ea ot eent n n ouo E e 3 3 1 CONNEGTION TO POWER noo ssarete tat anete O e ea ee ee 3 3 2 CONNECTING INTO A SYSTEM occccccccc eee 3 3 3 CONNECTING AN EXTERNAL REFERENCE INPUT 0 000 e eee eee 3 4 CORRECTIVE MAINTENANCE ooo 4 4 1 GENERAL cocaprtois deine ng atrae ela ae e pp glee led 4 4 2 TROUBLESHOOTING SUGGESTIONS 0 0 0 eee 4 4 3 FACTORY REPAIR SAFETY INSTRUCTIONS AND SYMBOLS This manual contains up to three levels of safety instructions that must be observed in order to avoid personal injury and or damage to equipment or other property These are DANGER Indicates a hazard that could result in death or serious bodily harm if the safety instruction is not observed WARNING Indicates a hazard that could result in bodily harm if the safety instruction is not observed CAUTION Indicates a hazard that could result in property damage if the safety instruction is not observed Please read all safety instructions carefully and make sure you understand them fully before attempting to use this product In addition the following symbol may appear on the product ATTENTION Refer to Manual DANGER High Voltage Please read all safety instructions carefully and make sure you understand them fully before attempting to use this product II III IV VI VII Section 1 Add symbol DANGER High Voltage next to the WARNING Section 2 Remove word toggle In
4. ECT THE HIGH VOLTAGE OUTPUT CONNECTOR WITH THE POWER SWITCH ON NEVER CHANGE THE OUTPUT POLARITY SWITCH WITH THE POWER SWITCH ON AL WAYS SWITCH POWER OFF AND WAIT AT LEAST 30 SECONDS BEFORE CONNECTING OR DIS CONNECTING CABLES AND BEFORE CHANG ING THE OUTPUT POLARITY 2 SPECIFICATIONS 2 1 PERFORMANCE OUTPUT POLARITY Positive or negative selected by switch on rear panel OUTPUT RANGE 50 to 3000 V minimum usable voltage 10 V OUTPUT LOAD CAPACITY 0 to 10 mA REGULATION lt 0 0025 variation in output voltage for combined line and load variations within operating range at constant ambient temperature TEMPERATURE INSTABILITY lt 50 ppm C after 30 minute warmup operating range 0 to 50 C LONG TERM DRIFT lt 0 01 hour and lt 0 03 24 hour variation in output voltage at constant input line voltage load and ambient temperature after 30 minute warmup OUTPUT RIPPLE lt 10 mV peak to peak 20 Hz to 20 MHZ OVERLOAD PROTECTION Internal circuitry protects against overloads including short circuits RESETTABILITY Output voltage can be reset to within 0 1 2 2 CONTROLS POWER Front panel toggle switch energizes unit when power cord is connected to appropriate source and an adjacent red LED lamp indicates when power is applied OUTPUT LEVEL One 6 position switch one 5 position switch and one 10 turn precision potentiometer output level is the sum of the 3 settings METER Front panel toggle sw
5. Printed in U S A Model 556H High Voltage Power Supply Operating and Service Manual ORTEC Part No 628440 Manual Revision F 1202 Advanced Measurement Technology Inc a k a ORTEC a subsidiary of AMETEK Inc WARRANTY ORTEC warrants that the items will be delivered free from defects in material or workmanship ORTEC makes no other warranties express or implied and specifically NO WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ORTEC s exclusive liability is limited to repairing or replacing at ORTEC s option items found by ORTEC to be defective in workmanship or materials within one year from the date of delivery ORTEC s liability on any claim of any kind including negligence loss or damages arising out of connected with or from the performance or breach thereof or from the manufacture sale delivery resale repair or use of any item or services covered by this agreement or purchase order shall in no case exceed the price allocable to the item or service furnished or any part thereof that gives rise to the claim In the event ORTEC fails to manufacture or deliver items called for in this agreement or purchase order ORTEC s exclusive liability and buyer s exclusive remedy shall be release of the buyer from the obligation to pay the purchase price In no event shall ORTEC be liable for special or consequential damages Quality Control Before being approved for shipment each ORTEC instrument
6. Section 2 3 change the last sentence to Fuse rating 1 5A FAST 250V size 3AG for 115V or 0 75A F 250V size 5X20 mm for 230V ac operation Section 3 2 change last sentence of the first paragraph to On 115 V ac operation a 1 5A FAST 250V size 3AG fuse should be used on 230 V ac operation a 0 75A F 250V size 5X20 mm fuse should be used Section 3 3 Change as follows 3 Install 1 5 A FAST 250V size 3AG for 115V in gray topped fuse knob or a 0 75A F 250V size 5X20 mm for 230V in black topped fuse knob 7 Remove word toggle Make Section 5 3 5 4 and add Section 5 3 as follows 5 1 Cleaning Instructions To clean the instrument exterior do the following 1 Remove loose dust on the outside of the instrument with a lint free cloth 2 Remove remaining dirt with a lint free cloth dampened in a general purpose detergent and water solution Do not use abrasive cleaners CAUTION To prevent getting moisture inside of the instrument during external cleaning use only enough liquid to dampen the cloth or applicator SAFETY WARNINGS AND CLEANING INSTRUCTIONS DANGER Opening the cover of this instrument is likely to expose dangerous voltages Disconnect the instrument from all voltage sources while it is being opened WARNING Using this instrument in a manner not specified by the manufacturer may impair the protection provided by the instrument Cleaning Instructions To clean the instrument exterior Unplug the i
7. arranty should follow the same procedure and ORTEC will provide a quotation Damage in Transit Shipments should be examined immediately upon receipt for evidence of external or concealed damage The carrier making delivery should be notified immediately of any such damage since the carrier is normally liable for damage in shipment Packing materials waybills and other such documentation should be preserved in order to establish claims After such notification to the carrier please notify ORTEC of the circumstances so that assistance can be provided in making damage claims and in providing replacement equipment if necessary Copyright O 2002 Advanced Measurement Technology Inc All rights reserved ORTEC is a registered trademark of Advanced Measurement Technology Inc All other trademarks used herein are the property of their respective owners CONTENTS WARRANTY sg aha aha aka ata d ii SAFETY INSTRUCTIONS AND SYMBOLS 0 iv SAFETY WARNINGS AND CLEANING INSTRUCTIONS 00 00 aaae v T DESCRIPTION r Tarsia n uaa E A 1 2 SPEGIFIGATIONS uti A AA EA del E O ER R R E OEO 1 2 1 PERFORMANCE ua 1 2 2 CONTROLS vierta e e eee eG ee ee eee Aa 1 2S INPUTS ta tata tata datada atte id 2 7g O A A A O 2 20 INDICATORS dde dd de hush dis 2 2 6 ELECTRICAL AND MECHANICAL 0 0 00 0 cette 2 2 7 ACCESSORIES AVAILABLE stini sisaan s aN AA A EAA E EE E EANA 2 2 8 RELATED EQUIPMENT aoea a E EE ET RRE RER RERNE 2 3 INSTALL
8. itch selects display of output voltage in kV or load current in mA POLARITY Rear panel switch selects either positive or negative output polarity CONTROL Rear panel locking toggle switch selects the reference source for the output voltage Int Selects the internal reference source the front panel controls select the output amplitude Ext Selects the external reference source output voltage is proportional to magnitude of reference input AC VOLTAGE Rear panel slide switch selects either 115 V or 230 V ac input voltage 2 3 INPUTS AC POWER 103 129 V or 206 258 V 47 63 Hz 70 W nominal at full output power supplied through international standard IEC power connector on rear panel Fuse rating 1 5 A 250 V fuse for 115 V ac operation or 0 75 250 V fuse for 230 V ac operation EXTERNAL CONTROL Full range of output voltage can be based on an external dc reference level furnished through a rear panel BNC connector control voltage range is O through 6 9 V dc control voltage polarity must be the same polarity as that selected by the rear panel Polarity switch this input protected against over voltages gt 7 V Input impedance gt 45 kQ 2 4 OUTPUTS REGULATED DC OUTPUT The adjusted and regulated voltage with selected polarity is furnished simultaneously to the two SHV connectors on the rear panel 2 5 INDICATOR METER Front panel LCD display indicates output voltage in kV 10 v or load current in mA HA Load cu
9. must pass a stringent set of quality control tests designed to expose any flaws in materials or workmanship Permanent records of these tests are maintained for use in warranty repair and as a source of statistical information for design improvements Repair Service If it becomes necessary to return this instrument for repair it is essential that Customer Services be contacted in advance of its return so that a Return Authorization Number can be assigned to the unit Also ORTEC must be informed either in writing by telephone 865 482 4411 or by facsimile transmission 865 483 2133 of the nature of the fault of the instrument being returned and of the model serial and revision Rev on rear panel numbers Failure to do so may cause unnecessary delays in getting the unit repaired The ORTEC standard procedure requires that instruments returned for repair pass the same quality control tests that are used for new production instruments Instruments that are returned should be packed so that they will withstand normal transit handling and must be shipped PREPAID via Air Parcel Post or United Parcel Service to the designated ORTEC repair center The address label and the package should include the Return Authorization Number assigned Instruments being returned that are damaged in transit due to inadequate packing will be repaired at the sender s expense and it will be the sender s responsibility to make claim with the shipper Instruments not in w
10. ne diagnostic tests The unit is short circuit protected and with a short circuit load the output voltage will drop to zero If an external short circuit must be removed before the 556H will again produce its adjusted voltage 4 2 TROUBLESHOOTING SUGGESTIONS Only service technicians trained and experienced in the service of high voltage circuitry should attempt trouble shooting this unit EXTREMELY DANGEROUS VOLTAGE LEVELS ARE PRESENT INSIDE THE 556H CHASSIS OBSERVE GREAT CAUTION WHEN ANY PROTECTIVE COVERS ARE REMOVED WITH POWER APPLIED To troubleshoot the 556H check the internal 12V supplies first then check for symmetrical conduction times for oscillator output MOSFETs Q10 and Q11 With the 556 set for positive polarity the voltages at U1 2 and 3 should be nearly identical and equal to the reference voltage setting this is not the case check components through the two regulating feedback loops described in Section 4 2 4 3 FACTORY REPAIR The 556H or any other standard ORTEC product may be returned to the factory for repair service at a nominal cost Our standard procedure for repair ensures the same quality control and checkout that are used for a new instrument Always contact Customer Services at ORTEC 865 482 4411 before sending in an instrument for repair to obtain shipping instructions and so that the required Return Authorization Number can be assigned to the unit Write this number on the address label and
11. nstrument from the ac power supply Remove loose dust on the outside of the instrument with a lint free cloth e Remove remaining dirt with a lint free cloth dampened in a general purpose detergent and water solution Do not use abrasive cleaners CAUTION To prevent moisture inside of the instrument during external cleaning use only enough liquid to dampen the cloth or applicator e Allow the instrument to dry completely before reconnecting it to the power source vi ORTEC 556H HIGH VOLTAGE POWER SUPPLY 1 DESCRIPTION The ORTEC 556H High Voltage Power Supply provides either polarity of output voltage from 50 to 3000 V 0 to 10 mA The adjusted output voltage of the selected polarity is available simultaneously through two SHV rear panel connectors A rear panel slide switch permits operation on either 115 or 230 V ac input power furnished through a removable power line cord and connector The 556H features a front panel LCD meter which can be programmed vi a front panel toggle switch to display either output voltage or load current The output voltage can be programmed by an external control via a rear panel BNC connector The 556H provides the extremely stable low noise high voltage that is required for proper bias of photmultiplier tubes ionization chambers and semiconductor detectors WARNING THIS INSTRUMENT PRODUCES EXTREMELY HAZARDOUS VOLTAGES AT A POTENTIALLY LETHAL CURRENT LEVEL NEVER CONNECT OR DISCONN
12. r source of nominal 115 V or 230 V ac A rear panel international standard IEC connector allows the connection of many different types of line cords between the ac outlet and the 556H A rear panel slide switch allows the choice of 115 V or 230 V ac input voltages The unit is shipped with a choice of two fuse holder caps to accommodate either 3AG or 5 x 20 mm size fuses On 115 V ac operation a 1 5 A 250 V rated fuse should be used on 230 V ac operation a 0 75 A 250 V rated fuse should be used 3 2 CONNECTING INTO A SYSTEM 4 Check to see that the power switch is in the Off position 2 Check rear panel 115 230 V ac switch and set to appropriate position 3 Install a 1 5 A 250 V fuse for 115 V ac setting or a 0 75 A 250 V fuse for 230 V ac setting in the rear panel mounted fuse holder 4 Check the polarity switch on the rear panel and set it for either positive or negative output polarity as required for the application 5 Connect a high voltage cable from either output connector on the 556H to instrument to be powered Use the other output connector if a second instrument is to be operated at the same output voltage 6 Set the front panel selector switches and potentiometer for the desired voltage level This is normally specified for the instruments to which the voltage is to be applied The adjusted output voltage will be the sum of the setting of all three controls 7 Turn on the power with the toggle switch on
13. rrent is sum of external load current and internal load current Internal load resistance is 5 MQ 2 6 ELECTRICAL AND MECHANICAL POWER REQUIREMENTS 115 or 230 V ac 47 63 Hz 70 W nominally WEIGHT Net 5 7 kg 12 6 Ib Shipping 6 6 kg 14 6 Ib DIMENSIONS 11 43 x 22 35 x 29 21 cm 4 5 x 8 8 x 11 5 in 2 7 ACCESSORIES AVAILABLE Two 3 66 cm 12 ft long adapter cables are available from ORTEC for connecting to the Model 556H SHV output connectors 1 ORTEC C 34 12 cable assembly RG 59 A U 75 Q cable with one C 37 SHV female plug and one C 26 MHV male plug 2 ORTEC C 36 12 cable assembly RG 59 A U 75 Q cable with two C 37 SHV female plugs 2 8 RELATED EQUIPMENT Each of the two outputs of the 556H can be used as a power source for any application that is within the operating limits of the power supply Both output levels are identical and of the same polarity The load on the 556H output circuit is the sum of the individual loads connected to the output connectors and the load current can be monitored by the front panel LDC meter This power supply is ideal for use with either one detector or a pair of detectors where the voltage level requirements are the same for both detectors The appropriate types of detectors for which the 556H is designed include photomultiplier tubes ionization chambers and semiconductor detectors 3 INSTALLATION 3 1 CONNECTION TO POWER The 556H requires a grounded ac powe
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