PS355 - Stanford Research Systems
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1. 1 Example Standard Event Enable The ESE common command sets queries the standard event status enable register to i The parameter is the decimal value for the enable register and can range from 0 to 255 ESE 16 ESR i SRS stanford Research Systems Example Standard Event The ESR common command query reads the value of the standard event status register If the optional parameter is present then only the value of bit is returned Reading this register will clear it Reading bit 7 will clear bit only ESR 5 1 PS300 Series High Voltage Power Supplies Commands PSC i Example Power On Status Clear The PSC common command sets queries the value of the power on status clear bit to i If i 1 the power on status clear bit is set and all status registers and enable registers are cleared on power up If i 0 the bit is cleared and the status enable registers maintain the values at power down This allows the generation of a service request at power up for example PSC 1 SRE 7 Example Service Request Enable The SRE common command sets queries the value of the service request enable register to i SRE 6 STB 7 Example Standard Byte The STB common command query reads the value of the serial poll status byte If the optional parameter i is present the value of bit i is returned Reading this register will clear bits 1 2 and 32. are optional in both set and query commands Parameters listed without surrounding characters are always re quired Do not send or or as part of the command Multiple parameters are separated by commas Multiple commands may be sent on one command line by separating them with semi colons so long as the input buffer does not overflow Commands are terminated by either CR or LF characters Null commands and whitespaces are ignored Execution of the command does not begin until the command terminator is received 3 4 2 Notation The following table summarizes the notation used in the command descriptions Symbol Definition i Unsigned integer x Assigned value Required for queries illegal for set commands var Parameter always required var Parameter required for set commands illegal for queries var Optional for both set and query commands 3 4 3 Examples Each command is provided with a simple example illustrating its usage In these examples all data sent by the host computer to the PS300 are set as straight teletype font while responses received by the host computer from the PS300 are set as slanted teletype font The usage examples vary with respect to set query and optional parameters These examples are not exhaustive and are intended to provide a convenient starting point for user programming PS300 Series High Voltage Power Supplies Phone 408 744 9040 www thinkSRS com Remote
3. 2 1 Setting Parameters 45 44 bee a ee S 2 2 22 Reget e a ase amp ps Re e ee Se 2 3 2 3 Store and Recall 2 3 2 4 Error Messages ia AAA 2 4 2 5 Analog Monitor and Control 2 4 2 6 Default State 2 5 Remote Operation he A 3 1 3 1 Index of Common Commands 3 2 3 2 Alphabetic List of Commands 3 3 3 3 Introduction 3 4 3 4 Comas 3 4 3 5 Status Model 3 12 3 6 Status Reporting eran a 3 13 Troubleshooting e a Be eo 4 1 4 1 Troubleshooting the PS300 2 4 4 2 ii SRS Stanford Research Systems Contents PS300 Series High Voltage Power Supplies General Information Warning Line Voltage Service The PS300 Series High Voltage Power Supplies are general purpose instruments designed for laboratory environments This unit contains hazardous high voltages Make certain the high voltage is completely discharged before removing the cable The charge on the cable can cause injury or damage The PS300 series supplies operate from a 90 VAC to 264 VAC power source having a line frequency between 47 Hz and 63 Hz Power consumption is less than 80 VA total A power entry module labeled AC POWER on the back panel of the PS300 provides connection to the power source and to a protective ground The PS300 uses a detachable three wire power cord for connection to the power source The exposed metal parts of the box are c
4. the remaining bits are either real time monitors of underlying conditions such as bit 7 HVON or summary bits such as bit 5 ESB STB 129 PS300 Series High Voltage Power Supplies Phone 408 744 9040 www thinkSRS com 3 5 Status Model SRS stanford Research Systems Remote Operation The PS300 series instruments follow the hierarchical IEEE 488 2 format A block diagram of the status register array is given in Fig ure 3 1 Standard Event Status Status Byte Figure 3 1 Status register model for the PS300 series High Voltage Power Supplies The two categories of registers in the PS300 series status model are as follows Event Registers These read only registers record the occurrence of defined events If the event occurs the corresponding bit is set to 1 Upon querying an event register all set bits within it are cleared These are some times known as sticky bits since once set a bit can only be cleared by reading its value Event register names end with SR Enable Registers These read write registers define a bitwise mask for their corre sponding event register If a bit position is set in an event register while the same bit position is also set in the enable register then the corresponding summary bit message is set Enable register names end with SE At power on all status registers are cleared PS300 Series High Voltage Power Supplies Status 3 13 3 6 Status Reporting The PS300 s
5. Voltage Set Memory error Power on memory error of the unit s last setup Default setup is recalled Illegal parameter entered Recall Error the stored setup was lost Illegal storage address Address 0 is reserved for default settings Device dependent Syntax error over GPIB Illegal parameter entered over GPIB Parameter entered is out of range Remote communication error Hardware watchdog When configured for rear control see 1 2 3 the rear panel SET voltage will set the output voltage When enabled the REAR rear panel status LED is lit and the output voltage being set by the rear panel is displayed in the middle display when it is showing voltage SET The voltage limit is still active and does not allow the rear panel voltage to set the output above the voltage limit If the rear panel voltage is too high the output voltage will stop at the limit voltage An input from 0 to 10 V will program the high voltage from 0 to full scale regardless of polarity 2 5 2 Voltage Monitor The voltage monitor BNC is a monitor output providing 0 to 10 volts for a 0 to full scale output regardless of polarity PS300 Series High Voltage Power Supplies SRS stanford Research Systems Analog Monitor and Control 2 5 3 Current Monitor 2 6 Default State The current monitor output BNC provides a 0 to 10 volt output for 0 to full scale output regardless of the output polarity The factory default setup can be
6. data sent by the host computer is set as straight teletype font while responses received by the host computer are setas slanted teletype font PS300 Series High Voltage Power Supplies Phone 408 744 9040 www thinkSRS com vi Voltage set accuracy Voltage display accuracy Voltage resolution Voltage resettability Voltage limit range Voltage regulation Output ripple rms Current limit range Current trip range Trip response time Current set accuracy Current resolution Current display accuracy Stability Temperature drift Protection HV output slew rate Recovery time Discharge time Monitor Output Output scale Current rating Output impedance SRS Stanford Research Systems General Information Specifications Model Output Voltage Maximum Current PS355 100V to 10kV 1mA PS365 100 V to 10kV 1mA PS370 100V to 20kV 500 pA P5375 100 V to 20kV 500 pA Voltage Output 0 01 0 05 of full scale Veet accuracy 1 V typ 2 V max 1V set and display 1V 0 to 100 of full scale 0 001 for 10 line change 0 04 for 100 load change Specifications apply for gt 0 5 full load to gt 1 no load of full scale voltage lt 0 01 of full scale max 0 to 105 of full scale 0 to 105 of full scale lt 10 ms 1A 1A 1 uA typ 2 uA max 0 01 per hr lt 0 03 per 8 hrs 50 ppm C 0 to 50 C typ Arc and short circuit protected programmable voltage limit cur
7. recalled by pressing the CLR key while turning the unit on or recalling setup 0 Note that pressing the CLR key while turning the unit on will also clear all buffers and erase any saved presets The default setup is also recalled after a power on memory error ERR 1 The default parameters are shown below P5355 PS365 PS370 P5375 P5300 Series High Voltage Power Supplies Voltage Set Voltage Limit Current Limit Current Trip Reset Mode High Voltage GPIB Addr Voltage Set Voltage Limit Current Limit Current Trip Reset Mode High Voltage GPIB Addr Voltage Set Voltage Limit Current Limit Current Trip Reset Mode High Voltage GPIB Addr Voltage Set Voltage Limit Current Limit Current Trip Reset Mode High Voltage GPIB Addr OV 10 000 V 1 050 pA 1 050 pA MAN OFF 14 OV 10 000 V 1 050 pA 1 050 pA MAN OFF 14 OV 20 000 V 525 uA 525 uA MAN OFF 14 OV 20 000 V 525 HA 525 HA MAN OFF 14 Phone 408 744 9040 www thinkSRS com SRS stanford Research Systems Guide to Operation PS300 Series High Voltage Power Supplies 3 Remote Operation In This Chapter This chapter describes operating the PS300 series over the RS 232 and GPIB computer interfaces 3 1 3 2 3 3 3 4 3 5 3 6 Index of Common Commands 3 2 Alphabetic List of Commands 3 3 Introduction 3 4 3 3 1 Power On Configuration 4s 3 4 3 3 2 Buffe
8. will be returned VLIM 2 0000E4 VSET x Example Voltage Set The VSET command sets queries the value of the voltage setting to x in volts If SMOD 1 rear panel control is enabled then setting the VSET command returns an error The value x must match the polarity of the power supply When SMOD 0 front panel control the VSET query returns the set parameter not the measured output voltage see VOUT 3 4 4 When SMOD 1 rear panel control the VSET query returns the high voltage setting programmed by the rear panel HVSET input As with front panel control the VSET value must be less than or equal to the VLIM value or an execution error will be returned VSET 19555 3 4 6 Interface Control Commands RST SRS stanford Research Systems Example Reset The RST common command resets the power supply to its default configuration It is the same as holding the CLR button depressed at power on RST PS300 Series High Voltage Power Supplies Commands IDN Identify The IDN common query returns the PS300 s device identification This string is formatted as follows StanfordResearchSystems PS3XX lt serial gt lt version gt where XX is the model number lt serial gt is the 6 digit serial number of the unit and lt version gt is the 3 digit firmware revision number Example IDN StanfordResearchSystems PS370 100003 0 29 OPC Operation Complete The OPC commo
9. ESR 1 3 10 PSC i 3 11 SRE 3 11 STB i 3 11 SRS Stanford Research Systems Clear Status Standard Event Status Enable Standard Event Status Power On Status Clear Service Request Enable Status Byte PS300 Series High Voltage Power Supplies Remote Operation 3 2 Alphabetic List of Commands CLS ESE i ESR 1 IDN OPC PSC 1 RCL i RST SAV i SRE 1 STB 1 H HVOF HVON I ILIM x IOUT ITRP x L LERR S SMOD i T TCLR TMOD 7 V VLIM x VOUT VSET x PS300 Series High Voltage Power Supplies 3 7 Clear Status Standard Event Status Enable Standard Event Status Identify Operation Complete Power On Status Clear Recall Reset Save Service Request Enable Status Byte High Voltage Off High Voltage On Current Limit Output Current Current Trip Last Error V Set Mode Trip Clear Trip Mode Voltage Limit Output Voltage Voltage Set Phone 408 744 9040 www thinkSRS com 3 3 Introduction Remote Operation Remote operation of the PS300 series is through a simple command language documented in this chapter Both set and query forms of most commands are supported allowing the user complete control of the instrument from a remote computer Both RS 232 and GPIB IEEE488 2 interfaces are supported 3 3 1 Power On Configuration 3 3 2 Buffers 3 4 Commands The settings for the RS 232 interface
10. Operation 3 4 4 Output Control Commands HVOF High Voltage Off The HVOF command turns the high voltage output OFF Example HVOF HVON High Voltage On The HVON command turns the high voltage ON provided the front panel high voltage switch is not in the OFF position If the switch is in the OFF position the high voltage is left off and an execution error is reported This command also automatically clears any voltage or current trips Example HVON IOUT Output Current The IOUT query returns the actual output current in amperes This is the same value shown on the front panel meter The value is always returned as an unsigned number regardless of the polarity of the power supply Example IOUT 4 78E 4 VOUT Output Voltage Example The VOUT query returns the actual output voltage in volts This is the same value shown on the front panel meter The value returned is a floating point value and includes the sign of the output voltage VOUT 1 8998E4 3 4 5 Setting Control Commands RCL I SRS stanford Research Systems Example Recall Configuration The RCL command recalls stored settings i RCL 0 restores the default settings If the stored setting is corrupted an error is returned RCL 3 PS300 Series High Voltage Power Supplies Commands 3 7 SAV i Save Configuration The SAV command stores the present setup as setting i may range from 1 to 9 Example SAV 3 ILIM x Limit Curre
11. Operation and Service Manual High Voltage Power Supplies PS355 PS365 PS370 PS375 4s RS stanford Research Systems Revision 1 0 December 2008 Certification Stanford Research Systems certifies that this product met its published specifications at the time of shipment Warranty This Stanford Research Systems productis warranted against defects in materials and workmanship for a period of one 1 year from the date of shipment Service For warranty service or repair this product must be returned to a Stanford Research Systems authorized service facility Contact Stanford Research Systems or an authorized representative before returning this product for repair Contact Information Stanford Research Systems Inc 1290 D Reamwood Avenue Sunnyvale CA 94089 USA Phone 408 744 9040 Fax 408 744 9049 www thinkSRS com info thinkSRS com Information in this document is subject to change without notice Copyright Stanford Research Systems Inc 2008 All rights reserved Printed in U S A SRS stanford Research Systems Document number 9 01637 903 PS300 Series High Voltage Power Supplies Contents General Information iii A e a aie a N D a e iv Notation 3 2 3 e a Be o SS v Specifications isd baw a vi Instrument Overview 1 1 1 1 FrontPamel 1 2 1 22 RearPanel 1 3 Guide to Operation e 54544434429 amp SE ow 2 1
12. are 9600 baud and no parity The default GPIB address is 14 The complete instrument configu ration is retained in non volatile memory When appropriate the default value for parameters is listed in boldface in the command descriptions The PS300 series stores incoming bytes in a 128 character input buffer Characters accumulate in the input buffer until a command terminator either CR or LF is received at which point the mes sage is parsed and executed Query responses are buffered in a 128 character output queue If the input buffer overflows then all data in both the input buffer and output queue are discarded and an error is reported in the Standard Event Status Byte This section provides syntax and operational descriptions for re mote commands 3 4 1 Command Syntax SRS stanford Research Systems The four letter mnemonic shown in CAPS in each command se quence specifies the command The rest of the sequence consists of parameters Commands may take either set or query form depending on wheth er the character follows the mnemonic Set only commands are listed without the query only commands show the after the mnemonic and optionally query commands are marked with a Parameters shown in and are not always required Parameters in are required to set a value and should be omitted for queries P5300 Series High Voltage Power Supplies Commands 3 5 Parameters in
13. d hold down the CLR key while turning the power back on This causes the unit to initialize the memory and load the default setup If the center display is filled with a particular number like 4444 or one particular message like Err2 and the keyboard is unresponsive check to see if a key is stuck down If so gently flick the stuck key back to the center of its hole 4 1 3 No High Voltage Check to make sure that the AIGH VOLTAGE LED is ON If the HIGH VOLTAGE LED is OFF check the following 1 Check the voltage limit and current trip levels to see that they are not too low for your load If the HIGH VOLTAGE LED is ON but the output voltage is zero or lower than expected check the following 1 Check if the LIMITLED is ON If so the current limit value could be too low or the load could be drawing excessive current 2 Make sure the voltage limit is as large or larger than the desired output voltage 3 Check the REAR status LED If it is ON then the high voltage is being programmed by the analog set voltage input on the rear panel and not by the front panel If so make sure the rear panel programming voltage is correct 4 1 4 Repeated Trips SRS stanford Research Systems Repeated trips can be caused by a change in load or a load that is P5300 Series High Voltage Power Supplies Troubleshooting 4 3 drawing too much current This may effect the voltage trip or the current trip Voltage Trips A voltage t
14. ed and then use the A and W keys to choose between Front and Rear Press ENTER to confirm the selection 1 2 4 IEEE 488 Port The 24 pin IEEE 488 GPIB connector allows computer control of PS300 series supplies The address is set from the front panel using the GPIB key 1 2 5 RS 232 Port The 9 pin female D sub connector allows computer control of power supply via RS 232 The interface settings are fixed as DCE 9600 baud no parity 8 bits 1 stop bit P5300 Series High Voltage Power Supplies SRS stanford Research Systems aa id MEERES SRS stanford Research Systems Instrument Overview PS300 Series High Voltage Power Supplies 2 Guide To Operation In This Chapter This chapter explains how to operate the PS300 Series High Voltage Power Supplies 2 1 2 2 2 3 2 4 2 5 2 6 Setting Parameters Bae E Ye ar 2 1 1 Setting the Output Voltage 12 2 4 2 1 2 Setting the Voltage Limit ys 2 0 6 2 1 3 Setting the Current Limit soc 2 1 4 Setting the Current Trip Reset ad Store and Recall vo iio REE OSS SSK Error Messer Gost ae carare nemamo Analog Monitor amp Control 25 1 Voltage Set oa ed A eS 2 5 2 Voltage Monitor aa AR 2 5 3 Current Monitor 23 ore Default State 2 2 Guide to Operation 2 1 Setting Parameters This section describes how to set the front panel parameters 2 1 1 Setting the Output Voltage The voltage set ca
15. eries reports on its status by means of two status bytes The serial poll byte and the standard status byte Upon power on the instrument may either clear all of its status enable registers or maintain them in the state they were in during power down The action taken is set by the PSC command and al lows things such as SRQ on power on to be produced if desired 3 6 1 Serial Poll Status Byte Bit Name Usage 0 stable Indicates VSET or ILIM value is stable The value depends on whether the PS300 is in contant current or constant voltage mode 1 vtrip Indicates a voltage trip has occurred 2 itrip Indicates a current trip has occurred 3 ilim Indicates a current limit condition has occurred 4 MAV Indicates GPIB output queue is non empty 5 ESB Indicates an unmasked bit in the standard status byte has been set 6 RQS MSS SRQ bit 7 hvon Indicates high voltage is on The PS300 will make a service request SRQ whenever one of these bits is set and the corresponding bit in the serial poll enable register is set Note that any status condition will produce only one SRQ even if it is never cleared The vtrip itrip and ilim bits are latched bits They are set on the occurrence of the appropriate event and stay set until either the status byte is read or the CLS command is sent This allows one to detect if a trip condition has ever occurred All the other bits indicate the current states of their respective func tions PS300 Series Hi
16. ge trip message appears in the middle display After a trip it is not necessary to clear the trip before turning the high voltage back on If it is necessary to change a parameter before turning the high voltage back on pressing CLR or putting the high voltage switch in the OFF position will clear the trip To set the voltage limit press SELECT until the voltage LIMIT LED is lit The present value of the voltage limit is displayed in the center window Change it with either the numeric keys or the PS300 Series High Voltage Power Supplies SRS stanford Research Systems he id ETERS Setting Parameters 2 3 cursor and press ENTER to update the actual limit value If an Err2 message appears illegal parameter entered check to see that the output voltage is less than or equal to the voltage limit 2 1 3 Setting the Current Limit Current limiting varies the output voltage to limit the output current to less than or equal to the programmed current limit value When the unit is current limited the LIMIT LED is lit The current limit is set in the same fashion as the voltage limit selecting the present value on the center window changing it and then entering the new value 2 1 4 Setting the Current Trip The current trip shuts off the high voltage when the output current exceeds the trip value The current trip value is set in the same fashion as the voltage and current limits After a current trip occurs the ITRP current t
17. gh Voltage Power Supplies Phone 408 744 9040 www thinkSRS com SRS stanford Research Systems Remote Operation 3 6 2 Standard Event Status Byte Bit Name Usage 0 OPC Set by OPC 1 unused 2 Query Error Set by an output queue overflow 3 Recall Err Set if a stored setting is corrupt 4 Execution Err Set by an out of range parameter or incomplete command 5 Command Err Set by a command syntax error or an unrecognizable command 6 URQ Set by any key press 7 PON Set by a power on condition This status byte is defined by IEEE488 2 1987 and is used primar ily to report errors in commands received over the communication interface Once set the bits in this register stay set and are cleared when read or when a CLS command is received If a bit in the standard status register is set and the corresponding bit in the standard status enable register is set then the ESB bit in the serial poll register is set 3 6 3 GPIB Error Messages If an error occurs due to an incomplete command the following er ror messages will appear on the middle display Err6 Syntax Error Over GPIB The command has an error in syntax or was unrecognizable This is the same error as seen in the Command Error bit 5 of the Standard Event Status Byte Err7 Illegal Parameter Entered Over GPIB A parameter was set out of range or a command could not be completed because of an overload condition This is the same error seen in the Execution Err bit 4
18. h Voltage Enable Switch Numeric Displays scsi Select Enter Clear Numeric and Cursor KeyS Instrument Status io we Sok wos 1 1 1 1 1 2 1 1 3 1 1 4 1 1 5 1 1 6 1 1 7 1 1 8 1 2 1 1 2 2 1 2 3 1 2 4 1 2 5 Other Keys Store and Recall Rear Panel Power Entry Module a4 4 4 oa one 5 High Voltage Connector Analog I O IEEE 488 Port o RS 232 Port do de de dy NIN A bh O A ee gI O1 O1 HR O 1 1 Front Panel Instrument Overview REAR SET UMT UMT TRIP VOLTAGE 2 Epa The front panel features of the PS300 Series High Voltage Power Supplies are examined in this section 1 1 1 Power Button The PS300 is turned on by depressing the POWER button The unit always powers up with the high voltage OFF The current instrument configuration and any saved instrument presets are stored in non volatile memory The model number 355 365 370 or 375 firmware version and serial number are displayed when power is turned on If an error appears on power up the current instrument configuration and any saved presets are lost and the default settings are used If the default settings are desired hold down the clear key CLR while turning on the power Note that this will clear out all buffers and erase any saved presets 1 1 2 High Voltage Enable Switch SRS stanford Research Systems The High Voltage enable sw
19. hange If an incorrect value is entered press CLR to start over When the desired value is displayed ENTER updates the unit s actual setting and stops the LED from flashing 1 1 5 Numeric and Cursor Keys All parameters may be adjusted using the cursor or numeric keys When using the cursor the digit being adjusted in the center display will flash The A and V keys increment and decrement the digit The 4 and gt keys select the flashing digit When using direct numerical entry simply press the number and decimal point keys until the desired value appears on the center display Note that the current is specified in microamps 1 1 6 Instrument Status 1 1 7 Other Keys Three LEDs indicate the instrument s status The LIMIT LED is on when the unit is in a current limit state REM is on when the front panel is locked out REAR is on when the high voltage setting is programmed by the rear panel analog input RESET toggles the reset mode between AUTO and MAN manual GPIB displays the GPIB address in the center display so it can be adjusted It also functions as the LOCAL key when the unit is in the remote mode PS300 Series High Voltage Power Supplies Phone 408 744 9040 www thinkSRS com Instrument Overview 1 1 8 Store and Recall 1 2 Rear Panel Store STO and Recall RCL allow up to nine complete instrument configurations to be saved in nonvolatile memory RCL 0 recalls the default settings T
20. he rear panel of the PS300 Series High Voltage Power Supplies is discussed next POWER lt 80 WATTS MONITOR CURRENT VOLTAGE gt MADE IN U S A 1 2 1 Power Entry Module The AC line cord plugs into the power entry module Refer to the General Information section of this manual for instructions on line voltage 1 2 2 High Voltage Connector SRS stanford Research Systems WARNING This unit contains hazardous voltages Please make certain that the high voltage is completely discharged before removing or connecting the high voltage cable High voltage cables can store charge If they are disconnected from the supply while high voltage is present electric shock can occur which may cause injury or damage the unit The high voltage output connector is a Kings type 1064 1 PS355 and PS365 or a Kings type 1764 1 PS370 and PS375 Please make certain that the high voltage is completely discharged before changing the cable Cables are available from SRS PS300 Series High Voltage Power Supplies 1 5 Instrument Overview 1 2 3 Analog I O The two MONITOR output BNCs are used to monitor the voltage and current signals Both are 0 to 10 V outputs corresponding to 0 to full scale The SET input BNC receives an analog programming voltage 0 to 10 VDC corresponding to 0 to full scale independent of high voltage polarity To select the rear SET analog high voltage control press SELECT on the front panel until REAR is select
21. itch has three positions that perform several functions In the down position the high voltage is OFF and all trips are cleared In this position the high voltage is locked OFF and cannot be turned on over the computer interface The UP position is momentary and it turns on the high voltage for manual or rear panel analog control In the middle position the high voltage is enabled but not necessarily ON and can be turned on over the computer interface The large red ON LED above the switch indicates that the high voltage is on the yellow TRIP LED indicates a trip has occurred P5300 Series High Voltage Power Supplies Front Panel 1 1 3 Numeric Displays The two large displays show output voltage to five significant digits and output current to four significant digits The polarity is indicated below the voltage display as either POSITIVE or NEGATIVE The smaller center display shows the value of the parameter that is being entered or adjusted That parameter is indicated by the row of LEDs directly below the center display 1 1 4 Select Enter Clear SELECT is used to choose which parameter is being displayed in the center display ENTER confirms the entry in the center display CLR erases the value in the middle display and recalls the last value that was entered To adjust a value SELECT is pressed until the appropriate LED is lit When the value is being changed the LED will flash to indicate the value is in a state of c
22. n be changed with the high voltage in either the ON or OFF mode To set the high voltage output press the SELECT key until the voltage SET LED is lit The present value of the set voltage will be displayed in the center window To change the value enter the desired voltage by using either the numeric keys or cursor After the new value has been entered into the center display press ENTER to update the output voltage The voltage SET LED will flash until ENTER or CLR is pressed to remind you that the displayed value is not the actual programmed value If an Err2 message appears illegal parameter entered check the voltage limit to see that it is greater than or equal to the desired set voltage Use the CLR key to clear any error message If the REAR status LED is lit the high voltage is programmed from the analog set input on the rear panel In this mode if the center display is showing voltage SET the displayed value is the present value of the high voltage programmed by the 0 to 10 V input and cannot be adjusted from the front panel 2 1 2 Setting the Voltage Limit The voltage limitis a protection feature to preventthe output voltage from being set too high or overshooting because of dramatic load changes The output voltage cannot be set higher than the voltage limit In addition if the output ever exceeds the limit by more than 2 of full scale the unit trips and the high voltage is disabled If this occurs a VTRP volta
23. n command causes remote command execution to pause until all pending operations are complete The OPC query will return the value 1 when operations are complete while the OPC set command will set the OPC bit bit 0 in the ESR register Example OPC 1 LERR Last Error The LERR query returns the error code of the last remote interface error A list of the possible error codes are as follows Code Meaning 10 Illegal value execution 100 Lost data query 101 No data query 102 No listener query 103 Overflow query 110 Illegal command parser 111 Undefined command parser 112 Illegal query parser 113 Illegal set parser 114 Null parameter parser 115 Extra parameter parser 116 Missing parameter parser 117 Overflow parser 118 Bad float parser 119 Float overflow parser PS300 Series High Voltage Power Supplies Phone 408 744 9040 www thinkSRS com Example Remote Operation 120 Bad integer parser 121 Integer overflow parser 122 Bad hex value parser 123 Hex overflow parser 124 Bad token integer parser 125 Unknown token parser 126 Syntax error parser 151 CMF reset device dependent 152 COP reset device dependent 153 Illegal reset device dependent 154 Recall error device dependent 155 Watchdog device dependent IDN LERR 113 3 4 7 Status Reporting Commands CLS Example Clear Status The CLS common command clears all status registers CLS ESE
24. nt The ILIM command sets queries the value of the current limit to x in amperes ILIM may be set from 0 to 105 of full scale Example ILIM 120E 6 ILIM 1 20E 4 ITRP x Trip Current The ITRP command sets queries the value of the current trip to x in amperes ITRP may be set from 0 to 105 of full scale Example ITRP 5 25E 4 SMOD 7 Rear Programming Mode The SMOD command sets queries the VSet setting mode SMOD 0 means that the voltage value is controlled by the front panel setting while SMOD 1 indicates that the output is controlled by the rear panel VSET voltage control input Note that changing the SMOD value while the high voltage is ON causes the high voltage to be switched OFF Example SMOD 1 TCLR Clear Trips The TCLR command clears any voltage or current trips Example TCLR PS300 Series High Voltage Power Supplies Phone 408 744 9040 www thinkSRS com TMOD 3 Example Remote Operation Trip Mode The TMOD command sets queries the trip reset mode to i The value i 1 sets manual trip reset while the value i 1 sets the trip reset mode to automatic TMOD 1 VLIM x Example Voltage Limit The VLIM command sets queries the value of the voltage limit to x in volts The sign of value x must match the polarity of the power supply As with front panel control the VLIM value must be greater than or equal to the VSET value or an execution error
25. of the Standard Event Status Byte Err8 GPIB Output Queue Full The output queue overflowed and was cleared This could be due to querying the instrument repeatedly and not PS300 Series High Voltage Power Supplies Status 3 15 reading back all the bytes This is the same error seen in the Query Error bit 2 of the Standard Event Status Byte PS300 Series High Voltage Power Supplies Phone 408 744 9040 www thinkSRS com SRS stanford Research Systems Remote Operation PS300 Series High Voltage Power Supplies 4 Troubleshooting In This Chapter This chapter is written to guide a qualified electronics technician through troubleshooting the PS300 Series Power Supplies 4 1 Troubleshooting the P5300 23 4556 04504 e Power On Resto osea oad 4 1 1 4 1 2 4 1 3 4 14 4 1 5 4 1 6 4 1 7 Stuck Keys No High Voltage s os Bees oe eS Repeated Trips 2046 620 22 see toa Rear Panel Voltage Set a 6 2 ew ess Front Panel Jest rocio Calibration Poo oe HO ee WWWNNNN KN Troubleshooting 4 1 Troubleshooting the PS300 Verify that the line cord is plugged all the way into the power entry module and the power button on the front panel is pressed in 4 1 1 Power On Reset 4 1 2 Stuck Keys If the instrument turns on with odd combinations of illuminated LEDs garbled displays or is unresponsive to the keyboard the memory contents may have been corrupted To remedy the situation turn the unit off an
26. onnected to the power ground to protect against electrical shock Always use an outlet which has a properly connected protective ground The rear panel high voltage connector and the BNC shields are also connected to chassis ground The PS300 series supplies CANNOT be floated The line fuse is internal to the instrument and may not be serviced by the user Operate only with covers in place to avoid personal injury Do not remove the product covers or panels Do not operate the product without all covers and panels in place The PS300 does not include any user serviceable parts inside Refer service to a qualified technician iii iv Contents Symbols you may find on SRS products Alternating current Caution risk of electric shock Frame or chassis terminal Caution refer to accompanying documents Earth ground terminal PS300 Series High Voltage Power Supplies SRS stanford Research Systems Contents v Notation Typesetting conventions used in this manual are as follows e Front panel buttons are represented as Button e The A and W keys increment and decrement a digit e The 4 and gt keys select a digit Front panel indicators are represented as Overload e The state of a switch is represented in italics as ON Remote command names are represented as IDN e Literal text other than command names is represented as OFF Remote command examples will all be set in monospaced font In these examples
27. rent limit and current trip 7 000 V s typ PS355 and PS365 14 000 V s typ PS370 and PS375 12 ms for 40 step change in load current typ lt 6 s to lt 1 of full scale voltage with no load typ 0 to 10 V 0 to full scale output regardless of polarity 10 mA max lt 10 PS300 Series High Voltage Power Supplies General Information Accuracy Update rate External Voltage Set Input scale Input impedance Accuracy Update rate Mechanical HV connector Mating connector Dimensions Weight Power Warranty vil 0 2 of full scale 87 5 Hz 0 to 10 V 0 to full scale output regardless of polarity 1MQ 0 2 of full scale 87 5 Hz Kings type 1064 1 PS355 and PS365 Kings type 1764 1 PS370 and PS375 Kings type 1065 1 PS355 and PS365 Kings type 1765 1 PS370 and PS375 8 1 x 3 5 x 16 WHD 8 lbs 50 W 90 to 264 VAC 47 to 63 Hz One year parts and labor on defects in materials or workmanship All performance specifications apply after a one hour warm up period P5300 Series High Voltage Power Supplies Phone 408 744 9040 www thinkSRS com General Information Vill PS300 Series HighVoltage Power Supplies Phone 408 744 9040 www thinkSRS com 1 Instrument Overview In This Chapter This chapter gives the user the necessary information to get started with the PS300 Series High Voltage Power Supplies 1 1 1 2 Front Panel Power Button gt esca soaa cresa Hig
28. rip message will appear in the middle display Current trips are cleared just like voltage trips 2 2 Reset The reset mode determines how the unit responds after a voltage or current trip In MAN manual mode the high voltage remains OFF after a trip and requires that the operator turn it back ON In AUTO automatic mode the unit waits until the later of the time for the output voltage to fall to 0 5 of full scale or two seconds and then turns the high voltage back ON This is useful when dealing with loads that occasionally short circuit but recover after removing the high voltage 2 3 Store and Recall The store and recall functions allow up to nine complete instrument setups to be saved To store a setup press the STO key followed by a number 1 to 9 and then the ENTER key To recall a setup press the RCL key followed by a number 0 to 9 and then the ENTER key RCL 0 returns the setup to the factory default Whenever a setup is recalled the high voltage is turned off for safety If an Err3 recall error occurs then that stored setup was lost due to a memory error and must be re entered PS300 Series High Voltage Power Supplies Phone 408 744 9040 www thinkSRS com Guide to Operation 2 4 Error Messages The following error messages may appear in the center display The CLR key clears the errors Err1 Err2 Err3 Err4 Err5 Err6 Err7 Err 8 Err9 2 5 Analog Monitor amp Control 2 5 1
29. rip may occur if the load changes too rapidly causing the voltage to overshoot Raising the voltage limit may eliminate the problem Current Trips Disconnect the load and see if the unit still trips If it works with no load there may be a problem with the load If it still trips the unit may be damaged Please contact the factory for further information 4 1 5 Rear Panel Voltage Set If the output voltage output is inaccurate check the REAR status LED and rear panel connection to see that it is in the SET BNC Make certain the voltage limit is set higher than the desired voltage 4 1 6 Front Panel Test To test the front panel hold down the ENTER key while turning on the unit After power is turned on you should see all indicators and numeric segments except for HV ON lit By pressing the A arrow key individual annunciator lamps will light one by one across the front panel except again for the HV ON indicator which is controlled directly by hardware wired to the high voltage enable circuitry Continue pressing the A key to then test the individual segments of the numeric displays After the final segment the decimal point press A again and all digits will be lit as 8 At this point press the AUTO MANUAL button upper left most button and the display should read 0 Continue across the front panel testing each button which should display a unique key code per button The codes increase from top to bo
30. rs 3 4 Commadds 3 4 3 4 1 Command Syntax 6 64 ee oo Yak ws 3 4 342 Notation 3 5 3 4 3 Examples ba 6 dee re 3 5 3 44 Output Control Commands 3 6 3 45 Setting Control Commands 3 6 3 4 6 Interface Control Commands 3 8 3 4 7 Status Reporting Commands 3 10 Status Model 3 12 Status Reporting er RR 3 13 3 6 1 Serial Poll Status Byte 4 saa es 3 13 3 6 2 Standard Event Status Byte 3 14 3 6 3 GPIB Error Messages oe a oe 3 14 3 1 Index of Common Commands Remote Operation Symbol Definition 1 Unsigned integer x Assigned value Required for queries illegal for set commands var Parameter always required var Parameter required for set commands illegal for queries var Optional for both set and query commands Output Commands HVOF 3 6 High Voltage Off HVON 3 6 High Voltage On IOUT 3 6 Output Current VOUT 3 6 Output Voltage Setting Control Commands RCL i 3 6 Recall SAV i 3 7 Save ILIM x 3 7 Current Limit ITRP x 3 7 Current Trip SMOD i 3 7 V Set Mode TCLR 3 7 Trip Clear TMOD i 3 8 Trip Mode VLIM x 3 8 Voltage Limit VSET x 3 8 Voltage Set Interface Control Commands RST 3 8 Reset IDN 3 9 Identify OPC 3 9 Operation Complete LERR 3 9 Last Error Status Reporting Commands CLS 3 10 ESE i 3 10
31. ttom and left to right After this test turn the power off and restart the instrument 4 1 7 Calibration The calibration parameters are determined by a computer aided calibration procedure at the factory These values are stored in the permanent memory of each unit Because of this there are no user adjustable components to calibrate PS300 Series High Voltage Power Supplies Phone 408 744 9040 www thinkSRS com SRS stanford Research Systems Troubleshooting PS300 Series High Voltage Power Supplies
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