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Keysight E3633A and E3634A User’s Guide

System-Related Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Calibration Commands

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

RS-232 Interface Commands

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

The SCPI Status Registers

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

What is an event register?

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

What is an enable register?

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

SCPI Status System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

The questionable status register . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

The standard event register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

The status byte register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Using Service Request (SRQ) and serial POLL . . . . . . . . . . . . . . . . 137

Using *STB? to read the status byte . . . . . . . . . . . . . . . . . . . . . . . . 138

Using the Message Available bit (MAV) . . . . . . . . . . . . . . . . . . . . . 138

To interrupt your bus controller using SRQ . . . . . . . . . . . . . . . . . . 138

To determine when a command sequence is completed . . . . . . . . 139

Using *OPC to signal when data is in the output buffer . . . . . . . . . 139

Status Reporting Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
An Introduction to the SCPI Language . . . . . . . . . . . . . . . . . . . . . . . . 143

Command format used in this manual

. . . . . . . . . . . . . . . . . . . . . . 144

Command separators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Using the MIN and MAX parameters . . . . . . . . . . . . . . . . . . . . . . . 145

Querying parameter settings

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

SCPI command terminators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

IEEE-488.2 common commands

. . . . . . . . . . . . . . . . . . . . . . . . . . 147

SCPI parameter types

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

Halting an Output in Progress

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

SCPI Conformance Information

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

SCPI confirmed commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Non-SCPI commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

IEEE-488 Conformance Information . . . . . . . . . . . . . . . . . . . . . . . . . . 154

Summary of Contents for E3633A

Page 1: ...Keysight E3633A and E3634A DC Power Supplies User s Guide ...

Page 2: ...ights customarily provided to the public to use modify reproduce release per form display or disclose commercial computer software or commercial com puter software documentation No additional government requirements beyond those set forth in the EULA shall apply except to the extent that those terms rights or licenses are explicitly required from all providers of commercial computer software pursu...

Page 3: ...the warranty period either Keysight or Keysight Technologies will at its option either repair or replace products which prove to be defective Keysight does not warrant that operation the software firmware or hardware shall be uninterrupted or error free For warranty service with the exception of warranty options this product must be returned to the nearest service center designated by Keysight Cus...

Page 4: ...ty terms contained in this statement except to the extent lawfully permitted do not exclude restrict or modify and are in addition to the mandatory rights applicable to the sale of this product to you Exclusive Remedies THE REMEDIES PROVIDED HEREIN ARE BUYER S SOLE AND EXCLUSIVE REMEDIES KEYSIGHT TECHNOLOGIES SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES W...

Page 5: ...ntain safe operation of the instrument Caution risk of danger refer to this manual for specific Warning or Caution information Direct current DC Protective conductor terminal Alternating current AC Earth ground terminal Out position of a bi stable push control Frame or chassis terminal In position of a bi stable push control Positive binding post Negative binding post ...

Page 6: ... product is a Safety Class I instrument provided with a protective earth terminal To minimize shock hazard the instrument chassis and cabinet must be connected to an electrical ground The instrument must be connected to the AC power supply mains through a three conductor power cable with the third wire firmly connected to an electrical ground safety ground at the power outlet Any interruption of t...

Page 7: ...ts CAUTION DO NOT SERVICE OR ADJUST ALONE Do not attempt internal service or adjustment unless another person capable of rendering first aid and resuscitation is present CAUTION DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT Because of the danger of introducing additional hazards do not install substitute parts or perform any unauthorized modification to the instrument Return the instrument to a Key...

Page 8: ...rdous or toxic substance elements are expected to leak or deteriorate during normal use Forty years is the expected useful life of the product ICES NMB 001 indicates that this ISM device complies with the Canadian ICES 001 Cet appareil ISM est conforme a la norme NMB 001 du Canada This symbol is a South Korean Class A EMC Declaration This is a Class A instrument suitable for professional use and i...

Page 9: ... and Control Instrument product The affixed product label is as shown below Do not dispose in domestic household waste To return this unwanted instrument contact your nearest Keysight Service Center or visit http about keysight com en companyinfo environment takeback shtml for more information Sales and Technical Support To contact Keysight for sales and technical support refer to the support link...

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Page 11: ...EEE Directive 9 Product category 9 Sales and Technical Support 9 List of Figures 17 List of Tables 19 1 General Information Safety Considerations 22 Safety and EMC requirements 22 Options and Accessories 23 Options 23 Accessories 24 Description 25 Installation 28 Initial inspection 28 Cooling and location 28 Product at a Glance 31 The front panel at a glance 31 Front panel voltage and current limi...

Page 12: ...0 Constant Current Operation 53 Storing and Recalling Operating States 56 Programming Overvoltage Protection 58 Programming Overcurrent Protection 63 Remote Voltage Sensing at the Front and Rear Terminals 67 CV regulation 67 Output rating 67 Output noise 68 Stability 68 Remote voltage sensing connections 68 Remote voltage sensing at the rear panel 70 Disabling the Output 71 Disabling the Output Us...

Page 13: ...e Format 85 Connection to a computer or terminal 86 DTR DSR Handshake Protocol 88 RS 232 troubleshooting 89 Calibration Overview 90 Calibration security 90 Calibration count 97 Calibration Message 98 4 Remote Interface Reference SCPI Command Summary 100 Simplified Programming Overview 107 Using the APPLy command 107 Using the low level commands 107 Reading a query response 108 Selecting a trigger ...

Page 14: ...e Message Available bit MAV 138 To interrupt your bus controller using SRQ 138 To determine when a command sequence is completed 139 Using OPC to signal when data is in the output buffer 139 Status Reporting Commands 140 An Introduction to the SCPI Language 143 Command format used in this manual 144 Command separators 145 Using the MIN and MAX parameters 145 Querying parameter settings 146 SCPI co...

Page 15: ...8 Declaration for Windows 3 1 180 Declaration for Windows 9 5 NT 4 0 180 7 Tutorial Overview of Keysight E3633A and Keysight E3634A Operation 182 Output Characteristics 184 Unregulated state 186 Unwanted signals 186 Connecting the Load 188 Output isolation 188 Multiple loads 188 Remote voltage sensing 190 Load consideration 191 Extending the Voltage and Current Range 193 Series connections 193 Par...

Page 16: ...00 Temperature coefficient of output offset 200 Stability of output offset 201 Output voltage overshoot 201 Programming language 201 State Storage Memory 201 Recommended calibration interval 201 Output Terminal Isolation maximum from chassis ground 201 AC input ratings selectable via rear panel selector 202 Maximum input power 202 Cooling 202 Operating temperature 202 Storage temperature 202 Envir...

Page 17: ...the power supply showing the isolation 183 Figure 7 3 Ideal Constant Voltage Power Supply 184 Figure 7 4 Ideal Constant Current Power Supply 184 Figure 7 5 Output Characteristics 185 Figure 7 6 Simplified diagram of common mode and normal mode sources of noise 187 Figure 7 7 Regulated power supply with remote sensing 190 Figure 7 8 Speed of response programming up full load 194 Figure 7 9 Speed of...

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Page 19: ...4A Programming Ranges 110 Table 4 3 Bit Definitions Questionable Status Register 134 Table 4 4 Bit Definitions Standard Event Register 135 Table 4 5 Bit Definitions Status Byte Summary Register 136 Table 7 1 Wire rating 188 Table 7 2 Slew rate 191 Table 8 1 Performance specifications 198 Table 8 2 Supplemental Characteristics 200 ...

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Page 21: ...ser s guide for your Keysight E3633A and E3634A DC power supplies Unless otherwise stated the information in this manual applies to both two models This chapter provides a general description of your power supply This chapter also contains instructions for initial inspection location and cooling for bench and rack operation selecting the power line voltage and connecting your power supply to ac po...

Page 22: ...ning of this manual for general safety information Safety and EMC requirements This power supply is designed to comply with the following safety and EMC Electromagnetic Compatibility requirements Low Voltage Directive 2006 95 EC EMC Directive 2004 108 EC Safety IEC 61010 1 2001 EN 61010 1 2001 CAN CSA C22 2 No 61010 1 04 ANSI UL61010 1 2004 EMC IEC61326 1 2005 EN61326 1 2006 Canada ICES NMB 001 Is...

Page 23: ...0 47 63 Hz input voltage For more information about changing the power line voltage setting see Power line voltage selection on page 36 in this chapter Option no Description 0EM 115 VAC 10 47 63 Hz Input 0E3 230 VAC 10 47 63 Hz Input 0E9 100 VAC 10 47 63 Hz Input 1CM Rack mount kit Keysight part number 5063 9243 0L2 Extra English Manual set local language manual files are included in the CD ROM Ke...

Page 24: ...arately Keysight part no Description 10833A GPIB cable 1 meter 3 3 feet 10833B GPIB cable 2 meter 6 6 feet 34398A RS 232 9 pin f to 9 pin f 2 5 m 8 2 ft cable plus 9 pin m to 25 pin f adapter 34399A RS 232 adapter kit contains 4 adapters 9 pin m to 25 pin m for use with PC or printer 9 pin m to 25 pin f for use with PC or printer 9 pin m to 25 pin m for use with modem 9 pin m to 9 pin m for use wi...

Page 25: ... 20V 10A Keysight E3633A 25V 7A and 50V 4A Keysight E3634A Constant voltage CV or constant current CC operation Overvoltage protection OVP and overcurrent protection OCP Three storage locations 1 to 3 for user defined operating states Automatic turn on self test Remote sensing for load voltage at the front or rear panel terminals User calibration from the front panel or over the remote interfaces ...

Page 26: ...PIB or RS 232 Capabilities include the following features Voltage and current programming Voltage and current readback Present and stored status readback Programming syntax error detection Complete self test The front panel VFD Vacuum Fluorescent Display includes Displaying actual values of output voltage and current meter mode Or displaying the limit values of voltage and current limit mode Check...

Page 27: ...ting bars without insulation are used to connect the output to the sense and the output to the sense terminals WARNING Outputs can be floated to maximum of 240 Vdc provided that the metal shorting bars without insulation are either replaced with insulated conductors or they are removed from the terminals so there is no operator access to the output conductors without insulation All field wiring in...

Page 28: ...t panel directly or with a controller over the GPIB or RS 232 interface using calibration commands Correction factors are stored in nonvolatile memory and are used during output programming Calibration from the front panel or a controller eliminate the need to remove the top cover or even the need to remove the power supply from your system cabinet You can guard against unauthorized calibration by...

Page 29: ...are free of dents and scratches and that the display is not scratched or cracked Electrical check Chapter 2 describes an initial operation procedure which when successfully completed verifies to a high level of confidence that the power supply is operating in accordance with its specifications Detailed electrical verification procedures are included in the Service Guide Cooling and location Coolin...

Page 30: ...63 9243 Installation instructions and hardware are included with each rack mounting kit Any Keysight System II instrument of the same size can be rack mounted beside the Keysight E3633A or E3634A DC power supply Remove the front and rear bumpers before rack mounting the power supply To remove the rubber bumper pull the bumper off from the top as there are protrusions on the sides and bottom of the...

Page 31: ...3634A User s Guide 31 To rack mount two instruments of the same depth side by side order lock link kit 5061 9694 and flange kit 5063 9214 To install two instruments in a sliding support shelf order support shelf 5063 9256 and slide kit 1494 0015 ...

Page 32: ...key E3634A 7 Store operating state Local key 8 Error Calibrate key 2 20V 10A range selection key E3633A 50V 4A range selection key E3634A 9 I O Configuration key 10 Output On Off key 3 Overvoltage protection key 11 Control knob 4 Overcurrent protection key 12 Resolution selection keys 5 Display key limit 13 Voltage current adjust selection key 6 Recall operating state key ...

Page 33: ...m remote interface mode 8 Error Calibrate key 2 Displays error codes generated during operation self test and calibration or enables calibration mode the power supply must be unsecured before performing calibration See Service Guide for more details on calibration 9 I O Configuration Secure key 3 Configures the power supply for remote interfaces or secure or unsecure the power supply for calibrati...

Page 34: ...ent control mode by pressing the key 5 Move the blinking digit to the appropriate position using the resolution selection keys and change the blinking digit value to the desired current limit by turning the control knob 6 Press the key to enable the output After about 5 seconds the display will go to output monitoring mode automatically to display the voltage and current at the output or the displ...

Page 35: ...ower supply to shutdown when the annunciator blinks OCP The overcurrent protection function is enabled when the annunciator turns on or the overcurrent protection circuit has caused the power supply to shutdown when the annunciator blinks CAL The power supply is in calibration mode Limit The display shows the limit values of voltage and current ERROR Hardware or remote interface command errors are...

Page 36: ...elect the GPIB or RS 232 interface see chapter 3 Set the GPIB bus address see chapter 3 Set the RS 232 baud rate and parity see chapter 3 1 Power line voltage setting 5 GPIB IEEE 488 interface connection 2 Power line fuse holder assembly 6 RS 232 interface connector 3 AC inlet 7 Rear output terminals 4 Power line module ...

Page 37: ...ord that has a plug appropriate for your location Contact the nearest Keysight Sales and Service Office if the wrong power line cord is included with your power supply Your power supply is equipped with a 3 wire grounding type power cord the third conductor being the ground The power supply is grounded only when the power line cord is plugged into an appropriate receptacle Do not operate your powe...

Page 38: ...embly with a flat blade screwdriver from the rear panel 2 Install the correct line fuse Remove the power line voltage selector from the power line module 3 Rotate the power line voltage selector until the correct voltage appears 4 Replace the power line voltage selector and the fuse holder assembly in the rear panel ...

Page 39: ...ws the user visually to check the display The output check ensures that the power supply develops its rated outputs and properly responds to operation from the front panel For complete performance and or verification tests refer to the Service Guide This chapter is intended for both the experienced and the inexperienced user because it calls attention to certain checks that should be made prior to...

Page 40: ... is shipped from the factory Change the voltage setting if it is not correct The settings are 100 115 or 230 Vac 3 Verify that the correct power line fuse is installed The correct fuse is installed for your country when the power supply is shipped from the factory For 100 or 115 Vac operation you must use a 6 3 AT fuse For 230 Vac operation you must use a 3 15 AT fuse 4 Connect the power line cord...

Page 41: ...out one second The GPIB address is set to 5 when the power supply is shipped from the factory for remote interface configuration If this is not the first time the power supply is turned on a different interface RS 232 or a different GPIB address may appear See Remote Interface Configuration on page 79 if you need to change the remote interface configuration 3 The 8V 1 or 25V 2 OVP OCP and OFF annu...

Page 42: ...it The blinking digit can be adjusted by turning the knob Notice that the display is in the meter mode Meter mode means that the display shows the actual output voltage and current 1 For Keysight E3633A Model 2 For Keysight E3634A Model NOTE If the power supply detects an error during power on self test the ERROR annunciator will turn on See Error Messages on page 156 ...

Page 43: ...rns on and the knob is selected for voltage control 2 Enable the outputs The OFF annunciator turns off and the 8V 1 or 25V 2 OVP OCP and CV annunciators are lit The blinking digit can be adjusted by turning the knob Notice that the display is in the meter mode Meter mode means that the display shows the actual output voltage and current 3 Check that the front panel voltmeter properly responds to k...

Page 44: ...2 Initial Operation 44 Keysight E3633A and E3634A User s Guide NOTE You can use the resolution selection keys to move the blinking digit to the right or left when setting the voltage ...

Page 45: ...dle the maximum current See Table 7 1 3 Enable the output The OFF annunciator turns off and the 8V 1 or 25V 2 OVP and OCP annunciators are lit The CV or CC annunciator turns on depending on the resistance of the test lead The blinking digit can be adjusted by turning the knob Notice that the display is in the meter mode Meter mode means that the display shows the actual output voltage and current ...

Page 46: ...ltage drop caused by the test lead 6 Ensure that the current can be adjusted from zero to the full rated value Adjust the knob until the ammeter indicates 0 amps and then until the ammeter indicates 20 0 amps 1 or 7 0 amps 2 7 Turn off the power supply and remove the short from the output 1 For Keysight E3633A Model 2 For Keysight E3634A Model NOTE You can use the resolution selection keys to move...

Page 47: ...74 Remote Interface Configuration 79 HPIB Interface Configuration 84 RS 232 Interface Configuration 85 Calibration Overview 90 So far you have learned how to install your power supply and perform initial operation During the initial operation you were briefly introduced to operating from the front panel as you learned how to check basic voltage and current functions This chapter will describe in d...

Page 48: ...y has two output ranges This feature allows more voltage at a lower current or more current at a lower voltage The desired output range is selected from the front panel or over the remote interfaces The 8V or 20V for the E3633A and 25V or 50V for the E3634A annunciator indicates the presently selected range When you press key the Limit annunciator blinks the display of the power supply goes to the...

Page 49: ... in CV mode in the 8V 20A 1 or 25V 7A 2 range and controlled from the front panel then the CV and 8V 1 or 25V 2 annunciators will turn on If however the power supply is remotely controlled the Rmt annunciator will also turn on and when the power supply is being addressed over HPIB interface the Adrs annunciator will turn on See Display annunciators on page 35 for more information 1 For Keysight E3...

Page 50: ...pply in the 20V 10A or 50V 4A range before proceeding to the next step The 20V 1 or 50V 2 annunciator turns on 3 Set the display to the limit mode Notice that the Limit annunciator blinks indicating that the display is in the limit mode When the display is in the limit mode you can see the voltage and current limit values of the power supply 1 For Keysight E3633A Model 2 For Keysight E3634A Model ...

Page 51: ...ion selection keys and adjust the knob to the desired output voltage 6 Return to the meter mode Press key or let the display time out after several seconds to return to the meter mode Notice that the Limit annunciator turns off and the displays shows OUTPUT OFF message 7 Enable the output The OFF annunciator turns off and the 8V 1 or 25V 2 or 20V 1 or 50V 2 OVP OCP and CV annunciators are lit Noti...

Page 52: ... Remote interface operation NOTE During actual CV operation if a load change causes the current limit to be exceeded the power supply will automatically crossover to the constant current mode at the preset current limit and the output voltage will drop proportionately CURRent current MIN MAX Set the current VOLTage voltage MIN MAX Set the voltage OUTput ON Enable the output NOTE You can use the re...

Page 53: ... 50V 4A 2 range press 1 or 2 key before proceeding to the next step The 20V 1 or 50V 2 annunciator turns on 3 Set the display to the limit mode Notice that the Limit annunciator blinks indicating that the display is in the limit mode When the display is in the limit mode you can see the voltage and current limit values of the selected supply 1 For Keysight E3633A Model 2 For Keysight E3634A Model ...

Page 54: ...on selection keys and adjust the knob to the desired output current 6 Return to the meter mode Press key or let the display time out after several seconds to return to the meter mode Notice that the Limit annunciator turns off and the display shows OUTPUT OFF message 7 Enable the output The OFF annunciator turns off and the 8V 1 or 25V 2 or 20V 1 or 50V 2 OVP OCP and CC annunciators are lit Notice...

Page 55: ...it Remote interface operation NOTE During actual CC operation if a load change causes the voltage limit to be exceeded the power supply will automatically crossover to constant voltage mode at the preset voltage limit and the output current will drop proportionately CURRent current MIN MAX Set the current VOLTage voltage MIN MAX Set the voltage OUTput ON Enable the output NOTE You can use the reso...

Page 56: ...he storage feature remembers output range selection the limit value settings of voltage and current output on off state OVP and OCT on off state and OVP and OCP trip levels 2 Turn on the storage mode Three memory locations numbered 1 2 and 3 are available to store the operating states The operating states are stored in non volatile memory and are remembered when being recalled This message appears...

Page 57: ...nge the displayed storage location to 3 If this setting is not followed within 3 seconds with key stroke the power supply returns to normal operating mode and will not recall the instrument state 3 from memory 7 Restore the operating state The power supply should now be configured in the same state as when you stored the state on the previous steps This message appears on the display for approxima...

Page 58: ...ndition Front panel operation Setting the OVP level and enable the OVP circuit 1 Turn on the power supply The power supply will go into the power on reset state the output is disabled the OFF annunciator turns on the 8V 20A 1 or 25V 7A 2 range is selected the 8V 1 or 25V 2 annunciator turns on and the knob is selected for voltage control 2 Enable the output The OFF annunciator turns off and the di...

Page 59: ... by turning the knob until the OVP circuit trips This will cause the power supply output to drop to near zero the OVP annunciator to blink and the CC annunciator to turn on The OVP TRIPPED message also appears on the display Clearing the overvoltage condition When the OVP condition occurs the OVP TRIPPED message is shown on the display the OVP annunciator blinks When it was caused by an external v...

Page 60: ...unciators are blinking 2 Move to the clear mode Press key twice to move to the OVP CLEAR mode The OVP ON message appears on the display Turn the knob to the right until the above message appears on the display 3 Clear the overvoltage condition and exit this menu Now when you press key again the DONE message is displayed for a second and the OVP annunciator will not blink any more The output will r...

Page 61: ...nk any more The output will return to the meter mode Remote interface operation OVP CLEAR VOLT PROT voltage MIN MAX Set the OVP level VOLT PROT STAT OFF ON Disable or enable the OVP circuit VOLT PROT CLE Clear the tripper OVP circuit NOTE The power supply s OVP circuit contains a crowbar SCR which effectively shorts the output of the power supply whenever the overvoltage condition occurs If extern...

Page 62: ...3 Front Panel Operation 62 Keysight E3633A and E3634A User s Guide Figure 3 1 Recommended protection circuit for battery charging ...

Page 63: ... Setting the OCP level and enable the OCP circuit 1 Turn on the power supply The power supply will go into the power on reset state the output is disabled the OFF annunciator turns on the 8V 20A 1 or 25V 7A 2 range is selected the 8V 1 or 25V 2 annunciator turns on and the knob is selected for voltage control 2 Enable the output The OFF annunciator turns off and the display will go to the meter mo...

Page 64: ...ase the output by turning the knob until the OCP circuit trips This will cause the power supply s output current to drop to zero and the OCP annunciator to blink The OCP TRIPPED message also appears on the display Clearing the overcurrent condition When the OCP condition occurs the OCP TRIPPED message is shown on the display the OCP annunciator blinks When it was caused by external voltage sources...

Page 65: ...y twice to move to the OCP CLEAR mode The OCP ON message appears on the display Turn the knob to the right until the above message appears on the display 3 Clear the overcurrent condition and exit this menu Now when you press key again the DONE message is displayed for a second and the OCP annunciator will not blink any more The output will return to meter mode The knob is selected for current con...

Page 66: ...n the display Turn the knob to the right until the above message appears on the display 3 Clear the overcurrent condition and exit this menu Now when you press again the DONE message is displayed for a second and the OCP annunciator will not blink any more The output will return the meter mode Remote interface operation OCP CLEAR CURR PROT current MIN MAX Set the OCP level CURR PROT STAT OFF ON Di...

Page 67: ...put terminals CV regulation The voltage load regulation specification in chapter 8 applies at the output terminals of the power supply When remote sensing add 5 mV to this specification for each 1V drop between the positive sensing point and output terminal due to the change in load current Because the sense leads are part of the power supply s feedback path keep the resistance of the sense leads ...

Page 68: ... cases it may cause oscillations To minimize this possibility keep the load leads as short as possible and twist them together As the sense leads are part of the power supply s programming feedback loop accidental open connections of sense or load leads during remote sensing operation have various unwanted effects Provide secure and permanent connections Remote voltage sensing connections Connecti...

Page 69: ... sure to disconnect all the connections to the load and sense leads at the other end terminals Do not make the sensing connections at both front and rear terminals at the same time It will cause to damage the power supply seriously NOTE During remote sensing setup it is strongly recommended to power off by pressing power ON OFF button the power supply to avoid undesirable damage to the load or the...

Page 70: ...iring The front panel binding posts are paralleled with the rear output terminals The rear output terminals accept wires sizes from AWG 22 to AWG 10 To minimize the possibility of instability on the output keep load leads as short as possible and bundle or twist the leads tightly together to minimize inductance Figure 3 3 Rear local sensing connections NOTE For rear local voltage sensing connectio...

Page 71: ...ile memory the output is always disabled when power has been off or after a remote interface reset Front panel operation You can disable the output by pressing key This key toggles between output Off and On states Remote interface operation NOTE While the output is disabled the range of selection keys the control knob the resolution selection keys and adjust selection key are still working If the ...

Page 72: ...trol an external relay This signal can only be controlled with the remote command OUTPut RELay OFF ON The TTL output is available on the RS 232 connection pin 1 and pin 9 When the OUTPut RELay state is ON the TTL output of pin 1 is high 4 5 V and pin 9 is low 0 5 V The levels are reversed when the OUTPut RELay state is OFF NOTE TTL output of pin 1 or pin 9 of the RS 232 connector is available only...

Page 73: ...om any unwanted changes occurring during an experiment or when you leave the power supply unattended To lock the knob move the blinking digit to the right or left using the resolution selection key or until the blinking digit disappears Notice that the knob and front panel keys are disabled when in the remote interface mode ...

Page 74: ... self test fails the ERROR annunciator turns on A complete self test performs a series of tests and takes approximately 2 seconds to execute If all tests pass you can have a high confidence that the power supply is operational If the complete self test is successful PASS is displayed on the front panel If the self test fails FAIL is displayed and the ERROR annunciator turns on See the Service Guid...

Page 75: ...e When you have read all errors from the queue the ERROR annunciator turns off The power supply beeps once each time an error is generated If more than 20 errors have occurred when you operate the power supply over the remote interface the last error stored in the queue the most recent error is replaced with 350 Queue overflow No additional errors are stored until you remove errors from the queue ...

Page 76: ...e knob to scroll through the error numbers Press to view the text of the error message Press or key to increase or decrease the scrolling speed of the text on the display All errors are cleared when you exit the menu or let the display time out for about 30 seconds Remote interface operation Errors have the following format the error string may contain up to 80 characters 3 ERR 102 SYSTem ERRor Re...

Page 77: ... remote interface The power supply can display up to 12 characters of the message on the front panel any additional characters are truncated Commas periods and semicolons share a display space with the preceding character and are not considered individual characters When a message is displayed outputs are not sent to the display Sending a message to the display from the remote interface overrides ...

Page 78: ...the third is for the front panel processor Remote interface operation Be sure to dimension a strong variable with at least 40 characters SCPI language version The power supply complies with the rules and regulations of the present version of SCPI Standard Commands for Programmable Instruments You can determine the SCPI version with which the power supply is in compliance by sending a command from ...

Page 79: ...d in non volatile memory and does not change when power has been off or after a remote interface reset If you select the HPIB interface you must select a unique address for the power supply The current address is displayed momentarily on the front panel when you turn on the power supply 1 Your HPIB bus controller has its own address Be sure to avoid using the bus controller s address for any instr...

Page 80: ...aud rate selection RS 232 You can select one of six baud rates for RS 232 operation The rate is set to 9600 baud when the power supply is shipped from the factory The baud rate can be set from the front panel only Select one of the following 300 600 1200 2400 4800 9600 baud The factory setting is 9600 baud The baud rate selection is stored in non volatile memory and does not change when power has ...

Page 81: ...at a different HPIB address may appear if the power supply has been changed from the factory setting 3 Turn the knob to change the HPIB address The displayed address is changed when turning the knob to the right or left 4 Save the change and turn off the I O configuration mode The address is stored in non volatile memory and does not change when power has been off or after a remote interface reset...

Page 82: ...an choose the RS 232 interface by turning the knob to the left 3 Move to the RS 232 interface setting mode and select the baud rate The rate is set to 9600 baud when the power supply is shipped from the factory Choose from one of the following by turning the knob to the right or left 300 600 1200 2400 4800 or 9600 baud 4 Save the change and choose the parity The power supply is configured for 8 da...

Page 83: ...emory and does not change when power has been off or after a remote interface reset The power supply displays a message to show that the change is now in effect If the baud rate and the parity are not changed NO CHANGE will be displayed for one second CHANGE SAVED NOTE To exit the I O configuration mode without any further changes press the I O Config key until the NO CHANGE message is displayed ...

Page 84: ...or both as long as the following rules are observed The total number of devices including the computer is no more than 15 The total length of all the cables used is no more than 2 meter times the number of devices connected together up to a maximum of 20 meters Do not stack more than three connector blocks together on any HPIB connector Make sure that all connectors are fully seated and that the l...

Page 85: ...iguration overview Configure the RS 232 interface using the parameters shown below Use the front panel key to select the baud rate parity and number of data bits see page 80 for more information to configure from the front panel RS 232 Data Frame Format A character frame consists of all the transmitted bits that make up a single character The frame is defined as the characters from the start bit t...

Page 86: ...5 pins DB 25 connector with a male or female pin configuration A male connector has pins inside the connector shell and a female connector has holes inside the connector shell If you cannot find the correct cable for your configuration you may have to use a wiring adapter If you are using a DTE to DTE cable make sure the adapter is a straight through type Typical adapters include gender changers n...

Page 87: ...null modem cable included with the HP 34398A Cable Kit This cable has a 9 pin female connector on each end The cable pin diagram is shown below NOTE DB 25 Serial Connection If your computer or terminal has a 25 pin serial port with a male connector use the null modem cable and 25 pin adapter included with the HP 34398A Cable Kit The cable and adapter pin diagram are shown below ...

Page 88: ...lk over the interface which means that it has processed a query and has received a new line message terminator it will set the DTR line FALSE This implies that once a query has been sent to the power supply the bus controller should read the response before attempting to send more data It also means that a new line must terminate the command string After the response has been output the power supp...

Page 89: ... bits Make sure that your computer is set up for 1 start bit and 2 stop bits these values are fixed on the power supply Make sure to execute the SYSTem REMote command to place the power supply in the remote mode Verify that you have connected the correct interface cable and adapters Even if the cable has the proper connectors for your system the internal wiring may be incorrect The HP 34398A Cable...

Page 90: ... been off or after a remote interface reset To secure the power supply from the remote interface the security code may contain up to 12 alphanumeric characters as shown below The first character must be a letter but the remaining characters can be letters or numbers You do not have to use all 12 characters but the first character must always be a letter To secure the power supply from the remote i...

Page 91: ...sight E3633A and E3634A User s Guide 91 NOTE If you forget your security code you can disable the security feature by adding a jumper inside the power supply and then entering a new code See the Service Guide for more information ...

Page 92: ...ey after the CAL MODE message is displayed in the calibration mode enter the security code using the knob and resolution selection keys and then press the Secure key When you press Secure key to save the change you will see the message below for one second if the security code is correct The unsecured setting is stored in non volatile memory and does not change when power has been off or after a r...

Page 93: ...Guide 93 Remote interface operation To unsecure the power supply send the above command with the same code used to secure For example CAL SEC STAT OFF ON code Secure or unsecure the power supply CAL SEC STAT OFF HP003633 E3633A CAL SEC STAT OFF HP003634 E3634A ...

Page 94: ...nd by holding Calibrate key for 5 seconds when you turn on the power supply To secure the power supply press Secure key after the CAL MODE message is displayed in the calibration mode enter the security code using the control knob and resolution selection keys and then press Secure key Notice that you should omit the HP and enter the remaining numbers as shown below When you press Secure key to sa...

Page 95: ...uide 95 Remote interface operation To secure the power supply send the above command with the same code as used to unsecure For example CAL SEC STAT OFF ON code Secure or unsecure the power supply CAL SEC STAT ON HP003633 E3633A CAL SEC STAT ON HP003634 E3634A ...

Page 96: ...is displayed in the calibration mode enter the new security code using control knob and resolution selection keys then press Secure key Changing the code from the front panel also changes the code required from the remote interface Remote interface operation To change the security code first unsecure the power supply using the old security code Then enter the new code For example CAL SEC CODE new ...

Page 97: ...alue The calibration count feature can be performed from the remote interface only The calibration count is stored in non volatile memory and does not change when power has been off or after a remote interface reset The calibration count increments up to a maximum of 32 767 after which it wraps around to 0 Since the value increments by one for each calibration point a complete calibration will inc...

Page 98: ...he person to contact for a new calibration You can record and read information in the calibration message from the remote interface only The power supply should be unsecured before sending a calibration message The calibration message may contain up to 40 characters The calibration message is stored in non volatile memory and does not change when power has been off or after a remote interface rese...

Page 99: ...Related Commands 123 Calibration Commands 128 RS 232 Interface Commands 131 The SCPI Status Registers 132 Status Reporting Commands 140 An Introduction to the SCPI Language 143 Halting an Output in Progress 149 SCPI Conformance Information 150 IEEE 488 Conformance Information 154 If you are a first time user of the SCPI language you may want to refer to these sections to become familiar with the l...

Page 100: ... later sections in this chapter for more complete details on each command Throughout this manual the following conventions are used for SCPI command syntax Square brackets indicate optional keywords or parameters Braces enclose parameters within a command string Triangle brackets indicate that you must substitute a value or a code for the enclosed parameter A vertical bar separates one of two or m...

Page 101: ... CURRent PROTection LEVel MIN MAX CURRent PROTection STATe 0 1 OFF ON CURRent PROTection STATe CURRent PROTection TRIPped CURRent PROTection CLEar VOLTage LEVel IMMediate AMPLitude voltage MIN MAX UP DOWN VOLTage LEVel IMMediate AMPLitude MIN MAX VOLTage LEVel IMMediate STEP INCRement numeric value DEFault VOLTage LEVel IMMediate STEP INCRement DEFault VOLTage LEVel TRIGgered AMPLitude voltage MIN...

Page 102: ...s Guide VOLTage RANGe P8V 1 P20V 1 P25V 2 P50V 2 LOW HIGH VOLTage RANGe MEASure CURRent DC VOLTage DC INITiate IMMediate TRIGger SEQuence DELay seconds MIN MAX DELay SOURce BUS IMM SOURce TRG 1 For Keysight E3633A Model 2 For Keysight E3634A Model Triggering Commands ...

Page 103: ...3634A User s Guide 103 DISPlay WINDow STATe OFF ON STATe TEXT DATA quoted string TEXT DATA TEXT CLEar SYSTem BEEPer IMMediate ERRor VERSion OUTPut RELay STATe OFF ON RELay STATe STATe OFF ON STATe IDN RST TST SAV 1 2 3 RCL 1 2 3 System Related Commands ...

Page 104: ...Libration COUNt CURRent DATA numeric value CURRent LEVel MIN MID MAX CURRent PROTection DAC ERRor SECure CODE new code SECure STATe OFF ON code SECure STATe STRing quoted string STRing VOLTage DATA numeric value VOLTage LEVel MIN MID MAX VOLTage PROTection Calibration Commands ...

Page 105: ...34A User s Guide 105 STATus QUEStionable CONDition EVENt ENABle enable value ENABle SYSTem ERRor CLS ESE enable value ESE ESR OPC OPC PSC 0 1 PSC SRE enable value SRE STB WAI SYSTem LOCal REMote RWLock Status Reporting Commands RS 232 Interface Commands ...

Page 106: ...te Interface Reference 106 Keysight E3633A and E3634A User s Guide CLS ESR ESE enable value ESE IDN OPC OPC PSC 0 1 PSC RST SAV 1 2 3 RCL 1 2 3 STB SRE enable value SRE TRG TST WAI IEEE 488 2 Common Commands ...

Page 107: ...details on outputting command strings and entering data Using the APPLy command The APPLy command provides the most straightforward method to program the power supply over the remote interface For example the following statement executed from your computer will set the power supply to an output of 3 V rated at 1 A Using the low level commands Although the APPLy command provides the most straightfo...

Page 108: ...rigger or an immediate internal trigger as a trigger source By default the BUS trigger source is selected If you want the power supply to use an immediate internal trigger you must select IMMediate For example the following statements executed from your computer will set to an output of 3 V 1 A immediately dimension statement Dimension string array 80 elements SYST ERR Read error queue bus enter s...

Page 109: ...ilable and MINimum MAXimum DEFault and reset values of the Keysight E3633A and E3634A power supplies Refer to this table to identify programming values when programming the power supply Table 4 1 Keysight E3633A programming ranges 0 8V 20A Range 0 20V 10A Range Voltage Programming Range 0 V to 8 24V 0 V to 20 60 V MAX Value 8 24 V 20 60 V MIN Value 0 V 0 V DEFault Value 0 V 0 V RST Value 0 V Curre...

Page 110: ...g Ranges 0 25V 7A Range 0 50V 4A Range Voltage Programming Range 0 V to 25 75V 0 V to 51 5 V MAX Value 25 75 V 51 5 V MIN Value 0 V 0 V DEFault Value 0 V 0 V RST Value 0 V Current Programming Range 0 A to 7 21 A 0 A to 4 12 A MAX Value 7 21 A 4 12 A MIN Value 0 A 0 A DEFault Value 7 0 A 4 0 A RST Value 7 00 A ...

Page 111: ...ed values only if the programmed values are valid within the presently selected range An execution error will occur if the programmed values are not valid within the selected range You can substitute MINimum MAXimum or DEFault in place of a specific value for the voltage and current parameters MIN selects the lowest values of 0 volts and 0 amps MAX selects the highest values allowed for the select...

Page 112: ... quoted string The voltage and current are returned in sequence as shown in the sample string below the quotation marks are returned as part of the string In the above string the first number 8 00000 is the voltage setting value and the second number 20 00000 is the current setting value 8 00000 20 00000 a or 25 00000 7 00000 b a Keysight E3633A Model b Keysight E3634A Model ...

Page 113: ...ly selected You can substitute MINimum or MAXimum in place of a specific value for the current parameter MIN selects the lowest current values of 0 amps MAX selects the highest current values allowed for the selected range This command also increases or decreases the immediate current level using the UP or DOWN parameter by a predetermined amount The command CURRent STEP sets the amount of increas...

Page 114: ...ple the output current will increase or decrease 10 mA if the step size is 0 01 This command is useful when you program the power supply to the allowed minimum resolution At RST the step size is the value of the minimum resolution CURRent STEP DEFault This query returns the value of the step size currently specified The returned parameter is a numeric value DEFault gives the minimum resolution of ...

Page 115: ...otection function of the power supply An overcurrent condition can be cleared with the CURR PROT CLE command after the condition that caused the OCP trip is removed At RST this value Is set to ON CURRent PROTection STATe This query returns the state of the overcurrent protection function The returned parameter is 0 OFF or 1 ON CURRent PROTection TRIPped This query returns a 1 if the overcurrent pr...

Page 116: ...creases the immediate voltage level using the UP or DOWN parameter by a predetermined amount The command VOLTage STEP sets the amount of increase or decrease Notice that a new increment setting will cause an execution error 222 Data out of range when the maximum or the minimum rated voltage is exceeded VOLTage example The following program segments show how to use the VOLT UP or VOLT DOWN command ...

Page 117: ...ied The returned parameter is a numeric value DEFault gives the minimum resolution step size in unit of volts VOLTage TRIGgered voltage MINimum MAXimum This command programs the pending triggered voltage level The pending triggered voltage level is a stored value that is transferred to the output terminals when a trigger occurs A pending triggered level is not affected by subsequent VOLTage comman...

Page 118: ... This query returns the state of the overvoltage protection function The returned parameter is 0 OFF or 1 ON VOLTage PROTection TRIPped This query returns a 1 if the overvoltage protection circuit is tripped and not cleared or a 0 if not tripped VOLTage PROTection CLEar This command causes the overvoltage protection circuit to be cleared After this command the output voltage is restored to the sta...

Page 119: ...ils of the programming ranges of the Keysight E3634A model P20V 1 or HIGH is the identifier for the 20V 10A 1 range and P8V 1 or LOW is for the 8V 20A 1 range At RST the 8V 20A 1 or 25V 7A 2 range is selected VOLTage RANGe This query returns the currently selected range The returned parameter for the Keysight E3633A is P20V HIGH or P8V LOW and the parameter for the Keysight E3634A is P50V HIGH or ...

Page 120: ...output is set to the triggered level immediately But if the trigger source is the bus the power supply is set to the triggered level after receiving the Group Execute Trigger GET or TRG command Trigger source choices You must specify the source from which the power supply will accept a trigger The trigger is stored in volatile memory the source is set to bus when the power supply has been off or a...

Page 121: ...is recognized You can use the OPC operation complete query command or the OPC operation complete command to signal when the operation is complete The OPC command returns 1 to the output buffer when the operation is complete The OPC command sets the OPC bit bit 0 in the Standard Event register when the operation is complete Immediate triggering To select the immediate trigger source send the follow...

Page 122: ...seconds MAX 3600 seconds At RST this value is set to 0 seconds TRIGger DELay This command queries the trigger delay TRIGger SOURce BUS IMMediate This command selects the source from which the power supply will accept a trigger The power supply will accept a bus software trigger or an internal immediate trigger At RST the bus trigger source is selected TRIGger SOURce This command queries the presen...

Page 123: ...g This command displays a message on the front panel The power supply will display up to 12 characters in a message any additional characters are truncated Commas periods and semicolons share a display space with the preceding character and are not considered individual characters DISPlay TEXT This command queries the message sent to the front panel and returns a quoted string DISPlay TEXT CLEar T...

Page 124: ...5 V The levels are reversed when the OUTPut RELay state is OFF At RST the OUTPut RELay state is OFF OUTPut RELay This command returns the state of the TTL relay logic signals See also OUTP REL command SYSTem BEEPer This command issues a single beep immediately NOTE TTL output of pin 1 or pin 9 of the RS 232 connector is available only after installing two jumpers inside the power supply See the Se...

Page 125: ...onds with 0 No error The error queue is cleared when power has been off or after a CLS clear status command has been executed The RST reset command does not clear the error queue SYSTem VERSion This command queries the power supply to determine the present SCPI version The returned value is of a string in the form YYYY V where the Y s represent the year of the version and the V represents a versio...

Page 126: ...3634A State CURR 20 A 7 A CURR STEP 0 32 mA typical value 0 13 mA typical value CURR TRIG 20 A 7 A CURR PROT 22 0 A 7 5 A CURR PROT STAT ON ON DISP ON ON OUTP OFF OFF OUTP REL OFF OFF TRIG DEL 0 0 TRIG SOUR BUS BUS VOLT 0 V 0 V VOLT STEP 0 36 mV typical value 0 95 mV typical value VOLT TRIG 0 V 0V VOLT PROT 22 0 V 55 0 V VOLT PROT STAT ON ON VOLT RANG P8V Low P25V Low ...

Page 127: ...e available to store operating states of the power supply The state storage feature remembers the states or values of the following commands CURR CURR STEP CURR TRIG CURR PROT CURR PROT STAT DISP OUTP OUTP REL TRIG DEL TRIG SOUR VOLT VOLT STEP VOLT TRIG VOLT PROT VOLT PROT STAT and VOLT RANG To recall a stored state you must use the same memory location used previously to store the state RCL 1 2 3...

Page 128: ... the output state is ON It enters a current value that you obtained by reading an external meter You must first select the minimum calibration level CAL CURR LEV MIN for the value being entered You must then select the middle and maximum calibration levels CAL CURR LEV MID and CAL CURR LEV MAX for the value being entered Three successive values must be selected and entered The power supply then co...

Page 129: ...de To change the security code first unsecure the power supply using the old security code Then enter the new code The calibration code may contain up to 12 characters over the remote interface but the first character must always be a letter CALibration SECure STATe OFF ON code This command unsecures or secures the power supply for calibration The calibration code may contain up to 12 characters o...

Page 130: ...ts are then stored in non volatile memory CALibration VOLTage LEVel MINimum MIDdle MAXimum This command can only be used after calibration is unsecured and the output state is ON It sets the power supply to a calibration point that is entered with CAL VOLT command During calibration three points must be entered and the low end point MIN must be selected and entered first CALibration VOLTage PROTec...

Page 131: ...front panel except the Local key are disabled SYSTem RWLock This command places the power supply in the remote mode for RS 232 operation This command is the same as the SYST REM command except that all keys on the front panel are disabled including the Local key Ctrl C This command clears the operation in progress over the RS 232 interface and discards any pending output data This is equivalent to...

Page 132: ...it is set subsequent state changes are ignored Bits in an event register are automatically cleared by a query of that register such as ESR or STAT QUES EVEN or by sending the CLS clear status command A reset RST or device clear will not clear bits in event registers Querying an event register returns a decimal value which corresponds to the binary weighted sum of all bits set in the register What ...

Page 133: ...Remote Interface Reference 4 Keysight E3633A and E3634A User s Guide 133 SCPI Status System ...

Page 134: ... and bit 10 reports that the overcurrent protection circuit has tripped To read the register send STATus QUEStionable Table 4 3 Bit Definitions Questionable Status Register The questionable status event register is cleared when You execute the CLS clear status command You query the event register using STAT QUES Status Questionable Event register command For example 16 is returned when you have qu...

Page 135: ...rd one or more errors in the power supply s error queue Read the error queue using the SYST ERR command Bit Decimal Value Definition 0 OPC 1 Operation Complete All commands prior to and including an OPC command have been executed 1 Not Used 0 Always set to 0 2 QYE 4 Query Error The power supply tried to read the output buffer but it was empty Or new command line was received before a previous quer...

Page 136: ...rts conditions from the other status registers Query data that is waiting in the power supply s output buffer is immediately reported through the Message Available bit bit 4 of Status Byte register Bits in the summary register are not latched Clearing an event register will clear the corresponding bits in the Status Byte summary register Reading all messages in the output buffer including any pend...

Page 137: ...nterrupt to use this capability Use the Status Byte enable register SRE command to select which summary bits will set the low level IEEE 488 service request signal When bit 6 request service is set in the Status Byte an IEEE 488 service request interrupt message is automatically sent to the bus controller The bus controller may then poll the instruments on the bus to identify which one requested s...

Page 138: ...nto your bus controller The power supply subsequently clears bit 4 only after all messages have been read from the output buffer To interrupt your bus controller using SRQ 1 Send a device clear message to clear the power supply s output buffer e g CLEAR 705 2 Clear the event registers with the CLS clear status command 3 Set up the enable register masks Execute the ESE command to set up the Standar...

Page 139: ...bit 0 is set in the Standard Event register 6 Use a serial poll to check to see when bit 5 standard event is set in the Status Byte summary register You could also configure the power supply for an SRQ interrupt by sending SRE 32 Status Byte enable register bit 5 Using OPC to signal when data is in the output buffer Generally it is best to use the operation complete bit bit 0 in the Standard Event...

Page 140: ... in the queue the most recent error is replaced with 350 Queue overflow No additional errors are stored until you remove errors from the queue If no errors have occurred when you read the error queue the power supply responds with 0 No error The error queue is cleared when power has been off or after a CLS clear status command has been executed The RST reset command does not clear the error queue ...

Page 141: ... register The power supply returns a binary weighted decimal representing the bits set in the enable register CLS This command clears all event registers and Status Byte register ESE enable value This command enables bits in the Standard Event enable register The selected bits are then reported to the Status Byte ESE This command queries the Standard Event enable register The power supply returns ...

Page 142: ...le value This command enables bits in the Status Byte enable register SRE This command queries the Status Byte Enable register The power supply returns a decimal value which corresponds to the binary weighted sum of all bits set in the enable register STB This command queries the Status Byte summary register The STB command is similar to a serial poll but it is processed like any other instrument ...

Page 143: ...n a hierarchical structure also known as a tree system In this system associated commands are grouped together under a common node or root thus forming subsystems A portion of the SOURce subsystem is shown below to illustrate the tree system SOURce CURRent current MIN MAX UP DOWN CURRent MIN MAX CURRent TRIGgered current MIN MAX TRIGgered MIN MAX VOLTage voltage MIN MAX UP DOWN VOLTage MIN MAX VOL...

Page 144: ...a value for the enclosed parameter For example the above syntax statement shows the current parameter enclosed in triangle brackets The brackets are not sent with the command string You must specify a value for the parameter such as CURR 0 1 Some parameters are enclosed in square brackets The brackets indicate that the parameter is optional and can be omitted The brackets are not sent with the com...

Page 145: ...micolon to link commands from different subsystems For example in the following command string an error is generated if you do not use the colon and semicolon Using the MIN and MAX parameters You can substitute MINimum or MAXimum in place of a parameter for many commands For example consider the following command Instead of selecting a specific current you can substitute MINimum to set the current...

Page 146: ...interpreted as a new line character and can be used to terminate a command string in place of a new line character A carriage return followed by a new line is also accepted Command string termination will always reset the current SCPI command path to the root level The new line character has the ASCII decimal code of 10 CURR 5 CURR CURR MAX CURR MIN CAUTION If you send two query commands without r...

Page 147: ...c parameters Commands that require numeric parameters will accept all commonly used decimal representations of numbers including optional signs decimal points and scientific notation Special values for numeric parameters like MINimum MAXimum and DEFault are also accepted You can also send engineering unit suffixes V A or SEC with numeric parameters If only specific numeric values are accepted the ...

Page 148: ...n you query a boolean setting the power supply will always return 0 or 1 The following command uses a boolean parameter Strings parameters String parameters can contain virtually any set of ASCII characters A string must begin and end with matching quotes either with a single quote or with a double quote You can include the quote delimiter as part of the string by typing it twice without any chara...

Page 149: ...e clear over the GPIB interface using Keysight BASIC The following statement shows how to send a device clear over the GPIB interface using the GPIB Command Library for C or QuickBASIC CLEAR 705 IEEE 488 Device Clear IOCLEAR 705 NOTE For RS 232 operation sending the Ctrl C character will perform the same operation as the IEEE 488 device clear message The power supply s DTR data terminal ready hand...

Page 150: ...non documented commands duplicate the functionality of a command already described in this manual SCPI confirmed commands The following table lists the SCPI confirmed commands that are used by the power supply DISPlay WINDow STATe OFF ON WINDow STATe WINDow TEXT DATA quoted string WINDow TEXT DATA WINDow TEXT CLEar INITiate IMMediate MEASure CURRent DC VOLTage DC OUTPut STATe OFF ON STATE SOURce C...

Page 151: ...ed CURRent PROTection CLEar SOURce VOLTage LEVel IMMediate AMPLitude voltage MIN MAX UP DOWN VOLTage LEVel IMMediate AMPLitude MIN MAX VOLTage LEVel IMMediate STEP INCRement numeric value DEFault VOLTage LEVel IMMediate STEP INCRement DEFault VOLTage LEVel TRIGgered AMPLitude voltage MIN MAX VOLTage LEVel TRIGgered AMPLitude MIN MAX VOLTage PROTection LEVel voltage MIN MAX VOLTage PROTection LEVel...

Page 152: ... E3634A User s Guide STATus QUEStionable CONDition QUEStionable EVENt QUEStionable ENABle enable value QUEStionable ENABle SYSTem BEEPer IMMediate ERRor VERSion TRIGger SEQuence DELay seconds MIN MAX SEQuence DELay SEQuence SOURce BUS IMM SEQuence SOURce ...

Page 153: ...ed with the SCPI standard in mind and they follow all of the command syntax rules defined by the standard Non SCPI commands APPLy voltage DEF MIN MAX current DEF MIN MAX APPLy CALibration COUNt CURRent DATA numeric value CURRent LEVel MIN MID MAX CURRent PROTection DAC ERRor SECure CODE new code SECure STATe OFF ON code SECure STATe STRing quoted string STRing VOLTage DATA numeric value VOLTage LE...

Page 154: ...n CLS IFC Interface Clear ESE enable value REN Remote Enable ESE SRQ Service Request Enable ESR IDN Addressed Commands OPC OPC DCL Device Clear PSC 0 1 EOI End or Identify PSC GET Group Execute Trigger RST GTL Go To Local SAV 1 2 3 LLO Local Lockout RCL 1 2 3 SDC Selected Device Clear SRE enable value SPD Serial Poll Disable SRE SPE Serial Poll Enable STB TRG TST WAI ...

Page 155: ...Keysight E3633A and E3634A DC Power Supplies User s Guide 155 5 Error Messages Error Messages 156 Execution Errors 157 Self Test Errors 165 Calibration Errors 167 ...

Page 156: ... remote interface or NO ERRORS from the front panel The error queue is cleared by the CLS clear status command or when power is cycled The errors are also cleared when you read the queue The RST reset command command does not clear the error queue Front panel operation Press Local key to return to front panel operation mode if the power supply is in remote operation mode If the ERROR annunciator i...

Page 157: ...or An invalid separator was found in the command string You may have used a comma instead of a colon semicolon or blank space or you may have used a blank space instead of a comma Example TRIG SOUR BUS or APPL 1 0 1 0 104 Data type error The wrong parameter type was found in the command string You may have specified a number where a string was expected or vice versa 105 GET not allowed A Group Exe...

Page 158: ...r supply You may have misspelled the command or it may not be a valid command If you are using the short form of the command remember that it may contain up to four letters Example TRIGG DEL 3 114 a Header suffix out of range The numeric suffix attached to a command header is not one of the allowable values Example OUTP2 ON 120 a Numeric data error An invalid number was specified for a numeric par...

Page 159: ...suffix was incorrectly specified for a numeric parameter You may have misspelled the suffix or the numeric parameter does not accept a suffix Example TRIG DEL 0 5 SECS 131 Invalid suffix A suffix was incorrectly specified for a numeric parameter You may have misspelled the suffix Example TRIG DEL 0 5 SECS 134 Suffix too long A suffix for a numeric parameter contained too many characters 138 Suffix...

Page 160: ...uffix 141 Invalid character data Either the character data element contained an invalid character or the particular element received was not valid for the header 144 Character data too long The character data element contained too many characters 148 Character data not allowed A discrete parameter was received but a character string or a numeric parameter was expected Check the list of parameters ...

Page 161: ... Trigger GET or TRG was received but the trigger was ignored Make sure that the trigger source should be selected to the bus and the trigger subsystem should be initiated by INIT IMM command 213 Init ignored An INITiate command was received but could not be executed because a measurement was already in progress Send a device clear to halt a measurement in progress and place the power supply in the...

Page 162: ... 350 Queue overflow The error queue is full because more than 20 errors have occurred No additional errors are stored until you remove errors from the queue The error queue is cleared when power has been off or after a CLS clear status command has been executed 410 Query INTERRUPTED A command was received which sends data to the output buffer but the output buffer contained data from a previous co...

Page 163: ...ng Example IDN SYST VERS 501 Isolator UART framing error 502 Isolator UART overrun error 503 a SPI data error Data error was detected during the communication between the main controller U101 and the I O controller U802 511 RS 232 framing error 512 RS 232 overrun error 513 RS 232 parity error 514 Command allowed only with RS 232 There are three commands which are only allowed with the RS 232 inter...

Page 164: ...5 Error Messages 164 Keysight E3633A and E3634A User s Guide 550 Command not allowed in local You should always execute the SYSTem REMote command before sending other commands over the RS 232 interface ...

Page 165: ...espond 602 RAM read write failed 603 A D sync stuck 604 A D slope convergence failed 605 Cannot calibrate rundown gain 606 Rundown gain out of range 607 Rundown too noisy 608 Serial configuration readback failed 609 a System ADC test failed 624 Unable to sense line frequency 625 I O processor does not respond 626 I O processor failed self test 630 Fan test failed a This error message is only appli...

Page 166: ...5 Error Messages 166 Keysight E3633A and E3634A User s Guide 631 System DAC test failed 632 Hardware test failed ...

Page 167: ... 703 Invalid secure code An invalid calibration security code was received when attempting to unsecure or secure the power supply You must use the same security code to unsecure the power supply as was used to secure it and vice versa The security code may contain up to12 alphanumeric characters The first character must be a letter 704 Secure code too long A security code was received which contai...

Page 168: ...e new calibration constants are not stored in the non volatile memory 715 Bad OCP cal data The overcurrent protection calibration constant is out of range Note that the new calibration constants are not stored in the non volatile memory 716 Bad DAC DNL error correction data Invalid data measured during the calibration for DAC differential nonlinearity error correction 717 Cal OVP or OCP status ena...

Page 169: ...m failed store recall data in location 1 744 Cal checksum failed store recall data in location 2 745 Cal checksum failed store recall data in location 3 746 Cal checksum failed DAC cal constants 747 Cal checksum failed readback cal constants 748 Cal checksum failed GPIB address 749 Cal checksum failed internal data 750 Cal checksum failed DAC DNL error correction data ...

Page 170: ...5 Error Messages 170 Keysight E3633A and E3634A User s Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...

Page 171: ...he examples in this chapter have been tested on a PC running Windows 3 1 Windows 95 or Windows NT 4 0 The examples are written for use over GPIB IEEE 488 or RS 232 But the examples for use over the RS 232 interface do not work with Windows 3 1 These examples require a VISA Virtual Instrument Software Architecture driver for use with your GPIB interface card in your PC You should have the visa dll ...

Page 172: ... lib Windows 95 NT and visa h file to the lib and include development directory These are usually found in the c vxipnp win win95 or winnt lib msc or c vxipnp win win95 or winnt include directory Diode c Diode C This example program steps the power supply through 11 voltages and measures the current response It prints the voltage step and the current response as a table Note that the GPIB address ...

Page 173: ... 0 6 voltage 0 8001 voltage 0 02 printf 3f voltage Display diode voltage Set output voltage ErrorStatus viPrintf power_supply Volt f n voltage if bGPIB delay 500 500 msec wating for RS 232 port CheckError Unable to set voltage Measure output current ErrorStatus viPrintf power_supply Measure Current n CheckError Unable to write device delay 500 Allow output to wait for 500 msec Retrieve reading Err...

Page 174: ...r use with GPIB 7 address use GPIB 7 INSTR address format strcpy VISA_address GPIB strcat VISA_address GPIB_Address strcat VISA_address INSTR else For use with COM2 port use ASRL2 INSTR address format strcpy VISA_address ASRL strcat VISA_address COM_Address strcat VISA_address INSTR Open communication session with the power supply ErrorStatus viOpenDefaultRM defaultRM ErrorStatus viOpen defaultRM ...

Page 175: ...000 Unit is milliseconds pdest strchr commandString Search for query command if pdest NULL ErrorStatus viScanf power_supply s ReadBuffer CheckError Can t Read From Driver strcpy pString ReadBuffer void ClosePort Close the communication port viClose power_supply viClose defaultRM void CheckError char pMessage if ErrorStatus VI_SUCCESS printf n s pMessage ClosePort exit 0 void delay clock_t wait clo...

Page 176: ... then record the response on the worksheet The example on the following pages characterizes a component across the terminals of the power supply This example reads 11 voltages from a worksheet programs the power supply to that voltage and then reads the current The value of current is recorded next to the voltage on the spread sheet Example program result The following table shows the result of th...

Page 177: ...ndows 95 NT go to the Insert menu choose Module The Module window appears Then type the text as shown starting on page 141 This module will configure all of the overhead required to communicate with the power supply over the interface Choose the preferred interface by setting bGPIB to True or False and change the GPIB address or RS 232 port in the routine OpenPort contained in the module To run th...

Page 178: ...arContents Dim I As Integer bGPIB True To use RS 232 set the bGPIB to False OpenPort SendSCPI RST Set power on condition SendSCPI Output on Turn on the output For I 5 To 15 SendSCPI Volt Str Cells I 1 Cells I 2 Val SendSCPI Meas Current Next I SendSCPI Output off Turn off the output ClosePort End Sub Private Function OpenPort Dim GPIB_Address As String Dim COM_Address As String If bGPIB Then GPIB_...

Page 179: ...orStatus viWrite power_supply ByVal commandString Len commandString _actual CheckError Can t Write to Device If bGPIB False Then delay 0 5 End If If InStr commandString Then ErrorStatus viRead power_supply ByVal ReadBuffer 512 actual CheckError Can t Read From Device ReturnString ReadBuffer crlfpos InStr ReturnString Chr 0 If crlfpos Then ReturnString Left ReturnString crlfpos 1 End If SendSCPI Re...

Page 180: ...ad Lib VISA DLL Alias 256 ByVal vi As Long ByVal Buffer As String ByVal count As Long retCount As Long As Long Declare Function viWrite Lib VISA DLL Alias 257 ByVal vi As Long ByVal Buffer As String ByVal count As Long retCount As Long As Long Declare Function viClear Lib VISA DLL Alias 260 ByVal vi As Long As Long Declaration for Windows 9 5 NT 4 0 Additional declations for VISA32 DLL are usally ...

Page 181: ...3633A and Keysight E3634A are high performance instruments capable of delivering clean DC power But to take full advantage of the performance characteristics designed into the power supply certain basic precautions must be observed when connecting it for use on the lab bench or as a controlled power supply This chapter describes basic operation of linear power supplies and gives specific details o...

Page 182: ... a constant output voltage Because the variable resistance of Figure 7 1 is actually one or more power transistor operating in the linear class A mode supplies with this type of regulator are often called linear power supplies Linear power supplies have many advantages and usually provide the simplest most effective means of satisfying high performance and low power requirements Figure 7 1 Diagram...

Page 183: ...h reliability The Keysight E3633A and Keysight E3634A contain a linear regulated power supply It is controlled by a control circuit that provides voltages to program the outputs The power supply sends back to the control circuits a voltage representing the output at the terminals The control circuits receive information from the front panel and send information to the display Similarly the control...

Page 184: ...edance at all frequencies Thus as Figure 7 4 indicates the ideal constant current power supply would accommodate a load resistance change by altering its output voltage by just the amount necessary to maintain its output current at a constant value The output of the E3633A and E3634A power supplies can operate in either constant voltage CV mode or constant current CC mode Under certain fault condi...

Page 185: ...age mode The load at point 1 has a relatively high resistance value compared to RC the output voltage is at the voltage setting and the output current is less than the current setting In this case the power supply is in the constant voltage mode and the current setting acts as a current limit Figure 7 5 Output Characteristics When the load RL is less than RC the output current will dominate since ...

Page 186: ...nce connected from either terminal to earth ground The first is called normal mode voltage noise and the second common mode current noise Figure 7 6 shows the simplified diagram of common mode and normal mode sources of noise Normal mode voltage noise is in the form of ripple related to the line frequency plus some random noise Both of these are of very low value in the Keysight E3633A and Keysigh...

Page 187: ...drop Using the remote sense leads at the load will compensate for lead resistance in the load leads Figure 7 6 Simplified diagram of common mode and normal mode sources of noise When the load changes very rapidly as when a relay contact is closed the inductance in the hook up wire and in the power supply output will cause a spike to appear at the load The spike is a function of the rate of change ...

Page 188: ... power supply each load should be connected to the output terminals using separate connecting wires This minimizes mutual coupling effects between loads and takes full advantage of the low output impedance of the power supply Each pair of wires should be as short as possible and twisted or shielded to reduce lead inductance and noise pick up If a shield is used connect one end to the power supply ...

Page 189: ...rial 7 Keysight E3633A and E3634A User s Guide 189 WARNING To satisfy safety requirements load wires must be heavy enough not to overheat while carrying the short circuit output current of the power supply ...

Page 190: ...roportional to the impedance of the load leads compared with the output impedance of the power supply With remote voltage sensing a feature included in the Keysight E3633A and E3634A power supplies it is possible to connect the input of the voltage feedback amplifier directly to the load terminals so that the regulator performs its function with respect to the load terminals rather than with respe...

Page 191: ...ad capacitance internal and external Inductive loading Inductive loads present no loop stability problems in constant voltage mode In constant current mode inductive loads form a parallel resonance with the power supply s output capacitor Generally this will not affect the stability of the power supply but it may cause ringing of the current in the load Pulse loading In some applications the load ...

Page 192: ...o pump current into the supply without risking loss of regulation and possible damage These effects can be avoided by preloading the output with a dummy load resistor The dummy load resistor should draw at least the same amount of current from the supply as the active load may deliver to the supply The value of the current for the dummy load plus the value of the current the load draws from the su...

Page 193: ...nals so that if operated in series with other power supplies damage will not occur if the load is short circuited or if one power supply is turned on separately from its series partners When series connection is used the output voltage is the sum of the voltages of the individual power supplies The current is the current of any one power supply Each of the individual power supplies must be adjuste...

Page 194: ... new output is programmed the power supply regulator circuit senses that the output is less than desired and turns on the series regulator to its maximum value IL the current limit or constant current setting This constant current IL charges the output capacitor CO and load resistor RL parallel The output therefore rises exponentially with a time constant RLCL towards voltage level ILRL a value hi...

Page 195: ...Since the control circuit can in no way cause the series regulator transistors to conduct backwards the output capacitor can only be discharged through the load resistor and internal current source IS The output voltage decays linearly with slope of IS CO with no load and stops falling when it reaches the new output voltage which has been demanded If full load is connected the output voltage will ...

Page 196: ...A power supplies incorporate circuitry to reduce the internal power dissipation of the power supply and therefore reduce the internal heat of the power supply Maximum internal power dissipation occurs at maximum current The internal power dissipation further increases as the output voltage is lowered A fan internal to the power supply is essential to keep internal temperatures low To assist in coo...

Page 197: ...mance specifications are listed in the following pages Specifications are warranted in the temperature range of 0 to 40 C with a resistive load Supplemental characteristics which are not warranted but are descriptions of performance determined either by design or testing The Service Guide contains procedures for verifying the performance specifications ...

Page 198: ...nt panel with respect to actual output 25 C 5 C of output offset b This specification may degrade when the unit is subjected to an RF field 3V meter Voltage 0 05 5 mV Current 0 15 5 mA Ripple and Noise with outputs ungrounded or with either output terminal grounded 20 Hz to 20 MHz Normal mode voltage 0 35 mV rms and 3 mV p p 0 5 mV rms and 3 mV p p Normal mode current 2 mA rms Common mode current ...

Page 199: ...erage time for output voltage to begin to change after receipt of digital data when the power supply is connected directly to the GPIB or RS 232 is less than 100 msec OVP and OCP accuracy of output offset Activation time Average time for output to start to drop after OVP and OCP condition occurs OVP 0 5 0 5 V OCP 0 5 0 5 A OVP 1 5 msec when the trip voltage is equal or greater than 3 V 10 msec whe...

Page 200: ...20 6 V 0 to 10 3 A 0 to 51 5V 0 to 4 12 A OVP 1 V to 22 V 1 V to 55 V Voltage Programming Speed Maximum time required for output voltage to settle within 1 of its total excursion for resistive load Excludes command processing time OCP 0 A to 22 A 0 A to 7 5 A Full Load No Load Full Load No Load Up 95 msec 45 msec 80 msec 100 msec Down 30 msec 450 msec 30 msec 450 msec Voltage drop Up to 0 7 V per ...

Page 201: ...put control is set to less than 1 V If the output control is set to 1 V or higher there is no overshoot Programming language SCPI Standard Commands for Programmable Instruments State Storage Memory Three 3 user configurable stored states Recommended calibration interval 1 year Output Terminal Isolation maximum from chassis ground 60 Vdc when connecting shorting conductors without insulation to the...

Page 202: ...arly to 50 at 55 C maximum temperature Storage temperature 20 to 70 C for storage environment Environmental Conditions Designed for indoor use in an installation category II pollution degree 2 environment Designed to operate at a maximum relative humidity of 95 and at altitudes of up to 2000 meters Dimensions 1 213 mmW x 133 mmH x 348 mmD 8 4 x 5 2 x 13 7 in std 115 Vac 10 47 to 63 Hz opt 0E3 230 ...

Page 203: ...A and E3634A User s Guide 203 Weight Weight MY53xx6xxx Figure 8 1 Dimensions of Keysight E3633A and E3634A power supplies Net 9 5 kg 21 lb Shipping 12 kg 26 lb Net 11 4 kg E3633A 10 9 kg E3634A Shipping 13 9 kg E3633A 13 4 kg E3634A ...

Page 204: ...8 Specifications 204 Keysight E3633A and E3634A User s Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...

Page 205: ...on is subject to change without notice Always refer to the Keysight website for the latest revision Keysight Technologies 1998 2019 Edition 9 March 26 2019 Printed in Malaysia E3634 90001 E3634 90001 www keysight com ...

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