Agilent Technologies System DC Power Supply Series N5700 User’s Guide A
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Safety Notices The following general safety precautions must be observed during all phases of operation of this instrument. Failure to comply with these precautions or with specific warnings or instructions elsewhere in this manual violates safety standards of design, manufacture, and intended use of the instrument. Agilent Technologies assumes no liability for the customer's failure to comply with these requirements. General Do not use this product in any manner not specified by the manufacturer.
In This Book This User’s Manual contains the operating instructions, installation instructions, and specifications of the Agilent Technologies Series N5700 750W and 1500W System DC Power Supplies. Specific chapters in this manual contain the following information: Quick Reference – Chapter 1 is a quick reference section that helps you quickly become familiar with your Agilent N5700 power supply. Installation – Chapter 2 describes how to install your power supply.
Contents 1 Quick Reference 7 The Agilent N5700 DC Power Supplies – At a Glance 8 The Front Panel - At a Glance 10 The Rear Panel – At a Glance 12 SCPI Programming Commands – At a Glance.
Programming Examples 81 Output Programming Example 82 Trigger Programming Example 83 A Specifications 85 Performance Specifications 86 Supplemental Characteristics 87 Outline Diagram 89 B Verification and Calibration 91 Verification 92 Calibration 111 C Service 113 Types of Service Available 114 Repackaging for Shipment 114 Operating Checklist 114 Error Messages 116 D Compatibility 121 Differences – In General 122 Compatibility Command Summary 123 Index 125 6 Series N5700 User’s Guide
1 Quick Reference The Agilent N5700 DC Power Supplies – At a Glance 8 The Front Panel - At a Glance 10 The Rear Panel – At a Glance 12 SCPI Programming Commands – At a Glance. 15 This chapter concisely describes the Agilent Technologies Series N5700 Power Supplies. This chapter is not meant to describe every operating feature in detail. It is simply a quick reference guide to quickly become familiar with the essential components of the power supply.
The Agilent N5700 DC Power Supplies – At a Glance The Agilent N5700 DC Power Supplies – At a Glance The Agilent Technologies Series N5700 System DC Power Supplies are general-purpose switching power supplies with a wide variety of output voltage and current ratings. These power supplies are power-factor corrected and operate from a worldwide AC voltage range. Output voltage and current are continuously displayed and LED indicators show the complete operating status of the power supply.
The Agilent N5700 DC Power Supplies – At a Glance Programmable Functions • Output voltage and current setting. • Output voltage and current measurement. • Output voltage and current trigger setting. • Output On/Off control. • Over-current protection setting. • Over-voltage protection setting and readback. • Under-voltage limit setting and readback. • Start-up mode (either last setting or reset mode) • Status register setting and readback.
The Front Panel - At a Glance The Front Panel - At a Glance 3 2 1 VOLTAGE 4 DC VOLTS 5 6 CURRENT DC AMPS CV CC PROT FINE LIMIT/ 16 14 OVP UVL OCP REM 13 11 9 OUT ON POWER 19 18 1 – VOLTAGE knob 17 15 12 7 10 8 Voltage function: Adjusts the output voltage, the over-voltage protection level, and the under-voltage limit. If over-voltage protection or under-voltage limits have been set, you cannot program the output voltage outside those limits.
The Front Panel - At a Glance 9 – REM button Mode function: Press REM to put the unit into local mode. (This button can be disabled with a Local Lockout command). Address function: Selects the GPIB address. Press and hold the REM button for three seconds to set the address with the Voltage knob. 10 – REM indicator When lit, indicates that the unit is in Remote mode. 11 – OCP button Enable function: Press OCP to turn over-current protection on. Press OCP again to turn over-current protection off.
The Rear Panel – At a Glance The Rear Panel – At a Glance 8 9 10/100 Ethernet LINK TX GPIB J2 SW1 +S+LS NC -LC-S ! ! +V -V J1 ON 1 2 3 4 5 6 7 8 9 OFF ANALOG PROGRAMMING AC INPUT NOT ACTIVE 80V - 600V 750W 2 7 6 5 4 6V - 60V 1500W 1 – AC input connector Wire clamp connector for 1500W output models. IEC connector for 750W output models. 2 – DC output connector Wire clamp connector for 80V to 600V models. Bus bars for 6V to 60V models.
The Rear Panel – At a Glance J2 Sense Connector 1 – Remote sense (+) 2 – Local sense (+) 3 – Not used 4 – Local sense (–) 5 – Remote sense (–) The factory-shipped configuration is shown in the figure. SW1 Setup Switch 1 2 3 4 5 6 7 8 9 The factory-shipped setting is Down for all switches. 1 – Output voltage, voltage programming Down: The output voltage is programmed by the front panel. The output voltage is programmed by the external voltage signal.
The Rear Panel – At a Glance J1 Analog Programming Connector Current Program Voltage Program Local / Analog Voltage Monitor Common (-S) CV / CC 13 25 12 24 11 10 23 22 9 21 8 7 20 19 6 18 5 17 Chassis Common Chassis Common Enable + 4 3 16 15 2 1 14 Parallel Current Monitor Current Prog. Return Voltage Prog. Return Local / Analog State Enable -Shut Off Power Supply OK The factory-shipped default configuration is Local operation, which does not require connection to J1.
SCPI Programming Commands – At a Glance. SCPI Programming Commands – At a Glance. NOTE Some [optional] commands have been included for clarity. Chapter 6 contains a complete description of all programming commands. Subsystem Commands.
SCPI Programming Commands – At a Glance.
2 Installation General Information 18 Inspecting the Unit 19 Installing the Unit 19 Connecting the Line Cord 21 Connecting the Load 23 Output Voltage Sensing 26 Load Considerations 28 Parallel Connections 30 Series Connections 32 J1 Connector Connections 34 This chapter describes how to install your power supply. It discusses installation, rack mounting, and line cord connections. This chapter also discusses how to connect your load to the output terminals.
General Information General Information Models 750 W Models 1500 W Models N5741A – N5749A N5761A – N5769A N5750A – N5752A N5770A – N5772A Options Option Description Item Description N5740A Rack-mount Slide Kit for installing in system II style cabinets Accessories Items Supplied 18 Item Description Power Cord A power cord appropriate for your location.
Inspecting the Unit Inspecting the Unit When you receive your power supply, inspect it for any obvious damage that may have occurred during shipment. If there is damage, notify the shipping carrier and nearest Agilent Sales and Service Office immediately. Refer to Appendix C for more information. Until you have checked out the power supply, save the shipping carton and packing materials in case the unit has to be returned.
Installing the Unit Rack Installation CAUTION Ensure that the screws used to attach the rack slide kit do not penetrate more than 6 mm into the sides of the unit. Do not block the air intake at the front of the unit or the exhaust at the rear of the unit. The Agilent N5700 power supplies can be mounted in a standard 19inch rack panel or cabinet. To install the power supply in a rack: 1. Use the front panel rack-mount brackets to install the power supply in the rack. 2.
Connecting the Line Cord Connecting the Line Cord WARNING SHOCK HAZARD The power cord provides a chassis ground through a third conductor. Be certain that your power outlet is of the three-conductor type with the correct pin connected to earth ground. FIRE HAZARD Use only the power cord that was supplied with your instrument. Using other types of power cords may cause overheating of the power cord, resulting in fire. NOTE The detachable power cord may be used as an emergency disconnecting device.
Connecting the Line Cord • Unscrew the base of the strain relief from the helix-shaped body. Insert the base through the outside opening in the AC input cover and screw the locknut securely (11-14 in-lb) into the base, from the inside. • Slide the helix-shaped body onto the AC cable. Insert the stripped wires through the strain relief base until the outer cable jacket is flush with the edge of the base. Tighten the body (16-18 in-lb) to the base while holding the cable in place.
Connecting the Load Connecting the Load WARNING SHOCK HAZARD Turn off AC power before making rear panel connections. All wires and straps must be properly connected with screws securely tightened.
Connecting the Load Cross section (mm2) Resistance Ω/kilometer Maximum length in meters to limit voltage to 1 V for 5 A for 10 A for 20A for 50A for 150A 2.5 4 6 10 16 25 35 8.21 5.09 3.39 1.95 1.24 0.795 0.565 24.0 39.2 59.0 102 160 250 354 12.0 18.6 29.4 51.2 80.0 125 177 6.0 9.8 14.8 25.6 40.0 62.0 88.0 2.4 4.0 5.8 10.2 16.0 25.2 35.4 0.8 1.4 2.0 3.4 5.4 8.4 11.
Connecting the Load Install the shield after you have finished connecting the load wires. Shield Load Connections for 80V to 600V Models WARNING SHOCK HAZARD Hazardous voltages may exist at the outputs and the load connections when using a power supply with a rated output greater than 40V. To protect personnel against accidental contact with hazardous voltages, ensure that the load and its connections have no accessible live parts.
Output Voltage Sensing • Loosen the two chassis screws marked A halfway. • Assemble the protective shield to the chassis and tighten the two screws to fix the shield to the chassis. Screws tightening torque: 4.8-5.3 in-lb A A • Tighten the wires to one of the shield sides using tie-wrap or equivalent. Refer to the following figure. Load wires • Ensure that the wire length inside the shield is long enough to provide proper strain relief.
Output Voltage Sensing The J2 connector plug specifications are as follows: NOTE Plug Type: MC 1.5/5-ST-3.81, Phoenix Wire Size: AWG 28 to AWG 16 Stripping Length: 7 mm (0.28 in.) Torque: 0.22 – 0.25 Nm (1.95 – 2.21 in-lb.) If the power supply is operated without the remote sense lines or local sense jumpers, it will continue to work, but the output voltage regulation will be degraded. Also, the OVP circuit may activate and shut down the power supply.
Load Considerations • Turn off the power supply. • Remove the local sense jumpers from the J2 connector. • Connect the negative sense lead to terminal 5 (-S) and the positive sense lead to terminal 1 (+S). Make sure that the connector plug is securely inserted into the connector body. • Turn on the power supply. Load lines. Twisted pair shortest length possible. +V Power Supply + Load -V - Rem.sense -Local sense +Local sense +Rem.sense NOTE Sense lines. Twisted pair or shielded wires.
Load Considerations If remotely located distribution terminals are used, as shown in the following figure, the power supply output terminals should be connected to the remote distribution terminals by a pair of twisted and/or shielded wires. Connect each load to the distribution terminals separately. Remote voltage sensing is recommended under these circumstances. Sense either at the remote distribution terminals or, if one load is more sensitive than the others, directly at the critical load.
Parallel Connections Grounding the Output The output of the power supply is isolated from earth ground. Either positive or negative voltages can be obtained from the output by grounding (or "commoning") one of the output terminals. Always use two wires to connect the load to the output regardless of where or how the system is grounded.
Parallel Connections +S -S -S Twisted pair +S MASTER POWER SUPPLY +V As short as possible -V Twisted pair +S J1-25 Parallel Current Program J1-8 J1-12 J1-10 SLAVE POWER SUPPLY -S +S LOAD +V -V -S Twisted pair -S +S Remote Sensing One of the units operates as a master and the remaining units are slaves. The slave units operate as controlled current sources following the master output current.
Series Connections Setting the Over-Voltage Protection The master unit OVP should be programmed to the desired OVP level. The OVP of the slave units should be programmed to a higher value than the master. When the master unit shuts down, it programs the slave unit to zero output voltage. If a slave unit shuts down when its OVP is set lower than the master output voltage, only that unit shuts down and the remaining slave units will supply all the load current.
Series Connections +LS +S +LS +S POWER SUPPLY -LS + - POWER SUPPLY (*) -S -LS + + - (*) -S + LOAD LOAD - +LS +S POWER SUPPLY -LS + - POWER SUPPLY (*) Diodes are user supplied. (*) - +LS +S -LS -S + - (*) -S Remote Sensing Local Sensing Refer to the following figure for typical connections of series power supplies configured as a positive and a negative output. +LS +S POWER SUPPLY + -LS -S - (*) + - +LS +S POWER SUPPLY + - (*) (*) Diodes are user supplied.
J1 Connector Connections J1 Connector Connections WARNING SHOCK HAZARD There is a potential shock hazard at the J1 connector when using a power supply with a rated output greater than 40V. Ensure that the load wiring insulation rating is greater than or equal to the maximum output voltage of the power supply. External programming and monitoring signal are located on the J1 connector. The power supply is shipped with a mating plug that makes it easy for you to make your wire connections.
3 Operating the Power Supply Locally Turn-On Check-Out 36 Normal Operation 38 Protection Functions 39 Output On/Off Control 42 Analog Programming of Output Voltage and Current 44 This chapter contains examples on how to operate your power supply from the front panel. A check-out procedure is included to let you verify that the power supply is operating properly. Additionally, information about programming the power supply using the J1 analog programming connector is also provided.
Turn-On Check-Out Turn-On Check-Out Before Check-Out Ensure that the power supply is configured as follows: WARNING • The unit is connected to an appropriate AC source as described in chapter 2. • The POWER switch is in the off position. • Sense connector pins 1 and 2 are jumpered; sense connector pins 4 and 5 are jumpered. • All switches on Connector J2 are in the down position. SHOCK HAZARD Be aware that hazardous voltages can be present on the output terminals.
Turn-On Check-Out UVL Check • Press the OVP/UVL button twice so that the DC AMPS display indicates UUL. The DC VOLTS display shows the UVL level. • Use the voltage knob and set the UVL level of the unit to 50% of its full-scale voltage rating or 30 volts, whichever is lower. • Wait a few seconds until the DC VOLTS display returns to show the output voltage. • Use the voltage knob and lower the output voltage of the unit until it approaches the UVL setting.
Normal Operation Normal Operation The power supply has two basic operating modes: constant voltage and constant current mode. In constant voltage mode, the power supply regulates the output voltage at the selected value, while the load current varies as required by the load. In constant current mode, the power supply regulates the output current at the selected value, while the voltage varies as required by the load.
Protection Functions CV/CC Mode Crossover If the power supply is in constant voltage mode and the load current increases above the current limit setting, the power supply switches to constant current mode. If the load decreases below the current limit setting, the power supply switches to constant voltage mode. CV/CC Signal CAUTION Do not connect the CV/CC signal to a voltage source higher than 30VDC.
Protection Functions • Press the OUT ON button to turn the output on. • Turn the AC power off, wait a few seconds, and turn it on. • Turn the output off, then on again using the Shut Off pin on the J1 connector. This only applies in Auto-Restart mode. • If the OVP continues to trip, try lowering the output voltage below the OVP setting, or raising the OVP setting. Under-Voltage Limit The under-voltage limit prevents adjustment of the output voltage below a certain limit.
Protection Functions Over-Temperature Protection The over-temperature protection circuit shuts down the power supply before the internal components can exceed their safe internal operating temperature. When an OTP condition occurs, the output is disabled, the display shows O7P, the PROT indicator blinks, and the OT status bit is set in the Questionable Condition status register. Resetting the OTP circuit can be automatic (non-latched) or manual (latched) depending on the Safe-Start or Auto-Restart mode.
Output On/Off Control Output On/Off Control The Output On/Off control turns the power supply output on or off. This can be done with the front panel OUT ON button or from the rear panel J1 connector. With the output off, adjustments can be made to the power supply or the load without shutting off AC power. OUT ON button The OUT ON button can be pressed at any time to enable or disable the power supply output. When the output is disabled, the output voltage and current go to zero and the display shows OFF.
Output On/Off Control Enable/Disable Terminals CAUTION To prevent possible damage to the unit, do not connect the Enable + or Enable – terminals to the positive or negative output terminals. Enable/Disable terminals are available on the J1 connector to enable or disable the power supply output. This function is level-triggered. Simply connect a switch or relay between J1 pins 1 and 14. This function is activated by SW1 setup switch 9. These pins disable the output when they are opened.
Analog Programming of Output Voltage and Current In Auto-Restart mode, the power supply restores the operating settings that were saved when it was last turned off (see below). The output is either enabled or disabled according to its last setting.
Analog Programming of Output Voltage and Current NOTE With analog programming enabled, you cannot program the output voltage or current using the front panel knobs or the remote interface. However, you can read back output voltage or current from the front panel or the remote interface. Analog Programming Control Terminals J1 connector pin 8 accepts a TTL signal or an open/short contact switch (referenced to pin 12) to select between Local or Analog programming of the output voltage and current.
Analog Programming of Output Voltage and Current The analog control circuits let you set the output voltage and current limit up to 5% over the model-rated maximum value. The power supply will operate within the extended range, however it is not recommended to operate the power supply over its voltage and current rating, and performance in this region is not guaranteed.
Analog Programming of Output Voltage and Current The analog control circuits let you set the output voltage and current limit up to 5% over the model-rated maximum value. The power supply will operate within the extended range, however it is not recommended to operate the power supply over its voltage and current rating, and performance in this region is not guaranteed.
4 Operating the Power supply Remotely Configuring the Interface 50 SCPI Commands – an Introduction 59 This chapter contains information on how to configure the three remote interfaces that are provided on the back of the instrument. In most cases you can connect your power supply to any one of these interfaces and be up and running with a minimum amount of configuration.
Configuring the Interface Configuring the Interface The Agilent N5700 power supplies support remote interface communication using a choice of three interfaces: GPIB, USB, and LAN. All three interfaces are live at power-on. NOTE Detailed information on configuring the remote interfaces is included in the USB/LAN/GPIB Interfaces Connectivity Guide document located on the CDROM included with this manual.
Configuring the Interface USB Interface The following steps will help you quickly get started connecting your instrument to the Universal Serial Bus (USB): NOTE Series N5700 User’s Guide 1 If you do not have the Agilent I/O Library software installed on your computer, install the I/O library software from the CD-ROM included with this manual. 2 Connect your instrument to the USB port on your computer. It may take several seconds for the computer to recognize the instrument.
Configuring the Interface LAN Interface The following steps will help you quickly get started connecting and configuring your instrument on a Local Area Network (LAN). The built-in Web server: Your Agilent N5700 power supply has a built-in Web server that lets you control it directly from an internet browser on your computer.
Configuring the Interface 4 NOTE If you need to reconfigure the LAN parameters, click on the View & Modify Configuration tab. All LAN parameters can be reconfigured using this page. If this does not work, perform a low-level verification of the LAN connection using ping. To do this, open a MS-DOS Command Prompt box and type: ping . Ping should indicate that it was able to connect with the N5700 unit. It will also indicate the IP address assigned.
Configuring the Interface NOTE If this does not work, perform a low-level verification of the LAN connection using ping. To do this, open a MS-DOS Command Prompt box and type: ping . Ping should indicate that it was able to connect with the N5700 unit. It will also indicate the IP address assigned. Note that certain firewall software can interfere with ping. If ping does not work, try temporarily disabling the firewall.
Configuring the Interface AutoIP This parameter allows automatic IP addressing to be enabled or disabled. AutoIP automatically assigns addresses on networks that do not have a DHCP server. If AutoIP is enabled (On), an IP address, Subnet Mask and Default Gateway will automatically be assigned to the instrument. If AutoIP is disabled (Off), the instrument will use the manual IP Address, Subnet Mask and Default Gateway specified in the following fields during power-on.
Configuring the Interface Hostname Domain Description LAN Keepalive Timeout 56 This field registers the supplied name with the selected naming service. If the field is left blank, then no name is registered. A Hostname may contain upper and lower case letters, numbers and dashes(-). The maximum length is 15 characters. The factory default is A-modelnumberserialnumber.
Configuring the Interface Using the Setup Utility A Setup Utility that lets you configure the LAN settings of your instrument is provided on the CD-ROM that is included with this manual. Install and run this Setup Utility if you cannot configure the LAN interface as previously described in this section. Series N5700 User’s Guide 1 Connect your power supply to your PC using either a USB a GPIB interface as previously described. 2 Install the Setup utility from the CD-ROM onto our PC.
Configuring the Interface 6 Click the Set button to save all the settings information. 7 Connect the LAN cable to your instrument and PC. Reboot the instrument and then wait about 2.5 minutes before using the new LAN settings. 8 View the LAN status settings located under the LAN Status tab. The assigned IP addres and Hostname will appear on this screen. You can also use the Setup utility to view model-specific information about your power supply.
SCPI Commands – an Introduction SCPI Commands – an Introduction SCPI (Standard Commands for Programmable Instruments) is an ASCII-based instrument command language designed for test and measurement instruments. SCPI commands are based on 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. Subsystem commands perform specific power supply functions.
SCPI Commands – an Introduction path is defined as the characters that make up the keywords of the previous command in the message up to and including the last colon separator. An example of a message with two commands is: OUTPut:STATe ON;PROTection:CLEar which shows the use of the semicolon separating the two commands, and also illustrates the command path concept.
SCPI Commands – an Introduction In the previous examples, the upper-case letters indicate the abbreviated spelling for the keyword. For shorter program lines, you can send the abbreviated form. For better program readability, you can send the long form. For example, VOLT and VOLTage are both acceptable forms. You can use upper- or lower-case letters. Therefore, VOLTAGE, Volt, and volt are all acceptable. Other forms, such as VOL and VOLTAG, generate an error.
SCPI Commands – an Introduction Parameter Types Data programmed or queried from the power supply is ASCII. The data may be numerical or character string. Numeric Parameters Symbol Response Formats Digits with an implied decimal point assumed at the right of the least-significant digit. Examples: 273 Digits with an explicit decimal point. Example: .0273 Digits with an explicit decimal point and an exponent. Example: 2.
SCPI Commands – an Introduction Response Data Types Symbol Response Formats Character Response Data. Permits the return of character strings. Arbitrary ASCII Response Data. Permits the return of undelimited 7-bit ASCII. This data type has an implied message terminator. String Response Data. Returns string parameters enclosed in double quotes. Device Clear You can send a Device Clear at any time to abort a SCPI command that may be hanging up the GPIB interface.
5 Language Reference Calibration Commands 66 Measure Commands 67 Output Commands 68 Source Commands69 Status Commands 71 System Commands 77 Trigger Commands 79 This section gives the syntax and parameters for all the IEEE 488.2 SCPI Subsystem commands and Common commands used by the power supply. It is assumed that you are familiar with the material in chapter 4, which explains the terms, symbols, and syntactical structures used here and gives an introduction to programming.
Calibration Commands Calibration Commands Calibration commands let you enable and disable the calibration mode, change the calibration password, calibrate current and voltage programming, and store new calibration constants in nonvolatile memory. NOTE If calibration mode has not been enabled with CALibrate:STATe, the calibration commands will generate an error. CALibrate:CURRent[:LEVel] This command initiates the calibration of the output current.
Measure Commands CALibrate:STATe [,] CALibrate:STATe? This command enables/disables calibration mode. Calibration mode must be enabled for the power supply to accept any other calibration commands. The first parameter specifies the enabled or disabled state On (1) or Off (0). The second parameter is the password. A password is required if calibration mode is being enabled and the existing password is not 0.
Output Commands Output Commands Output commands enable the output, power-on, and protection functions. OUTPut[:STATe] OUTPut[:STATe]? This command enables or disables the specified output(s). The enabled state is On (1); the disabled state is Off (0). The state of a disabled output is a condition of zero output voltage and a zero source current (see *RST). The query returns 0 if the output is off, and 1 if the output is on. The *RST value = Off.
Source Commands Source Commands Source commands program the voltage, current, triggered, and protection functions. [SOURce:]CURRent[:LEVel][:IMMediate][:AMPLitude] [SOURce:]CURRent[:LEVel][:IMMediate][:AMPLitude]? [SOURce:]CURRent[:LEVel]:TRIGgered[:AMPLitude] [SOURce:]CURRent[:LEVel]:TRIGgered[:AMPLitude]? These commands set the immediate and the triggered output current level. The values are programmed in amperes. The immediate level is the output current setting.
Source Commands [SOURce:]VOLTage:LIMit:LOW [SOURce:]VOLTage:LIMit:LOW? This command sets the low voltage limit of the output. When a low voltage limit has been set, the instrument will ignore any programming commands that attempt to set the output voltage below the low voltage limit. The*RST value = Max. The range of values that can be programmed for this command is coupled with the immediate voltage level setting.
Status Commands Status Commands Status commands program the power supply’s status registers. As shown in the following figure, the power supply has three groups of status registers; Operation, Questionable, and Standard Event. The Operation and Questionable status groups each consist of the Condition, Enable, and Event registers and NTR and PTR filters.
Status Commands The Standard Event group is programmed with Common commands as described later in this section. Common commands also control additional status functions such as the Service Request Enable and the Status Byte registers. STATus:PRESet This command sets all defined bits in the Operation and Questionable PTR registers. The command clears all defined bits in the Operation and Questionable NTR and Enable registers.
Status Commands STATus:OPERation:NTR STATus:OPERation:PTR STATus:OPERation:NTR? STATus:OPERation:PTR? These commands set or read the value of the Operation NTR (Negative-Transition) and PTR (Positive-Transition) registers.
Status Commands STATus:QUEStionable:ENABle STATus:QUEStionable:ENABle? This command and its query set and read the value of the Questionable Enable register. This register is a mask for enabling specific bits from the Questionable Event register to set the questionable summary bit (QUES) of the Status Byte register. This bit (bit 3) is the logical OR of all the Questionable Event register bits that are enabled by the Questionable Status Enable register. The Preset value = 0.
Status Commands *ESE *ESE? This command programs the Standard Event Status Enable register bits. The programming determines which events of the Standard Event Status Event register (see *ESR?) are allowed to set the ESB (Event Summary Bit) of the Status Byte register. A "1" in the bit position enables the corresponding event. All of the enabled events of the Standard Event Status Event Register are logically OR-ed to cause the Event Summary Bit (ESB) of the Status Byte Register to be set.
Status Commands *SRE *SRE? This command sets the condition of the Service Request Enable Register. This register determines which bits from the Status Byte Register are allowed to set the Master Status Summary (MSS) bit and the Request for Service (RQS) summary bit. A 1 in any Service Request Enable Register bit position enables the corresponding Status Byte Register bit and all such enabled bits then are logically OR-ed to cause Bit 6 of the Status Byte Register to be set.
System Commands System Commands System commands control system functions that are not directly related to output control, measurement, or status functions. Common commands are also used to control system functions. SYSTem:COMMunicate:RLSTate LOCal|REMote|RWLock SYSTem:COMMunicate:RLSTate? This command configures the remote/local state of the instrument according to the following settings. LOCal The instrument is set to front panel control (front panel keys are active).
System Commands *OPT? This query requests the unit to identify any installed options. A 0 indicates no options are installed. *RCL This command restores the power supply to a state that was previously stored in memory locations 0 through 15 with the *SAV command. Note that you can only recall a state from a location that contains a previously-stored state. NOTE All saved instrument states are lost when the unit is turned off. *RST This command resets the power supply to a factory-defined state.
Trigger Commands Trigger Commands Trigger commands consist of the Abort, Trigger, and Initiate commands. Initiate commands initialize the trigger system. Trigger commands control the triggering of the power supply. ABORt This command cancels any trigger actions in progress and returns the trigger system to the IDLE state, unless INIT:CONT is enabled. It also resets the WTG bit in the Status Operation Condition register. ABORt is executed at power-on and upon execution of *RST.
6 Programming Examples Output Programming Example 82 Trigger Programming Example 83 This chapter contains several remote interface example programs to help you develop programs for your own application. Chapter 5, “Language Reference” lists the syntax for the SCPI (Standard Commands for Programmable Instruments).
Output Programming Example Output Programming Example This program sets the voltage, current, over-voltage, and the overcurrent protection. When done, the program checks for instrument errors and gives a message if there is an error.
Trigger Programming Example ' Set the over voltage level .WriteString "VOLT:PROT:LEV " & Str$(overVoltSetting) ' Set the current level .WriteString "CURR " & Str$(CurrSetting) ' Turn on over current protection .WriteString "CURR:PROT:STAT " & Str$(overCurrentOn) ' Turn the output on .WriteString "OUTP ON" ' Measure the voltage .WriteString "MEAS:VOLT?" MeasureVoltString = .ReadString MsgBox "Measured Voltage is " & MeasureVoltString ' Check instrument for any errors .WriteString "Syst:err?" ErrString = .
Trigger Programming Example ' Use the following line instead for USB communication ' IOaddress = "USB0::2391::1799::US00000002" ' Initialize the VISA COM communication Set ioMgr = New AgilentRMLib.SRMCls Set Instrument = New VisaComLib.FormattedIO488 Set Instrument.IO = ioMgr.Open(GPIBaddress) VoltSetting = 3 CurrSetting = 1.5 trigVoltSetting = 5 ' volts ' amps ' volts With Instrument ' Send a power reset to the instrument .WriteString "*RST" ' Query the instrument for the IDN string .
A Specifications Performance Specifications 86 Supplemental Characteristics 87 Outline Diagram 89 This chapter lists the specifications and supplemental characteristics of the Agilent N5700 power supplies. A dimensional line drawing of the unit is included at the end of the chapter. Unless otherwise noted, specifications are warranted over the ambient temperature range of 0 to 40°C. Sensing is at the rear terminals of the power supply after a 30-minute warm-up period.
Performance Specifications Performance Specifications Agilent Models N5741A – N5752A and N5761A – N5772A Model (V rating) 6V 8V 12.5V 20V 30V 40V 60V 80V 100V 150V 300V 600V 6V 8V 12.5V 20V 30V 40V 60V 80V 100V 150V 300V 600V DC Output Ratings: Voltage Current 750W 100A 90A 60A 38A 25A 19A 12.5A 9.5A 7.5A 5A 2.5A 1.3A Current 1500W 180A 165A 120A 76A 50A 38A 25A 19A 15A 10A 5A 2.
Supplemental Characteristics Supplemental Characteristics Agilent Models N5741A – N5752A and N5761A – N5772A Model (V rating) 6V 8V 12.5V 20V 30V 40V 60V 80V 100V 150V 300V 600V Output Response Time: (to settle to within 0.5% of the rated output, with a resistive load) Up, full load 0.08s 0.08s 0.08s 0.08s 0.08s 0.08s 0.08s 0.15s 0.15s 0.15s 0.15s 0.25s Down, full load 0.01s 0.05s 0.05s 0.05s 0.08s 0.08s 0.08s 0.15s 0.15s 0.15s 0.15s 0.30s Down, no load 0.5s 0.
Supplemental Characteristics Agilent Models N5741A – N5752A and N5761A – N5772A Model (V rating) 6V 8V 12.
Outline Diagram Outline Diagram VOLTAGE I 43.6mm A OVP PROT FINE LIMIT UVL N5749A 100V/7.5A 750W O DC VOLTS System DC Power Supply DC AMPS CURRENT OCP REM OUT ON POWER 482.8+/-1.0mm 422.8+/-1.0mm 10/100 Ethernet TX LINK GPIB J2 SW1 +S+LSNC-LC-S ON 1 2 3 4 5 6 7 8 9 OFF +V -V J1 ANALOG PROGRAMMING NOT ACTIVE AC INPUT 507.0+/-1.0mm A 92.0+/-0.5 57.8+/-0.5 A 92.0+/-0.5 21.0 A 433+/-1.0mm Strain-Relief Detail 1500W Models 4+ 10 /- mm 2.0 Bus-Bar Detail 6V to 60V Models 3.
B Verification and Calibration Verification 92 Calibration 111 The verification procedures described in this appendix verify that the power supply is operating normally and is within published specifications. This appendix also includes calibration procedures for the Agilent N5700 power supplies. Instructions are given for performing the procedures from a controller over the GPIB. NOTE Perform the verification tests before calibrating your power supply.
Verification Verification Verification procedures verify that the power supply is operating normally and is within published specifications. There are two types of verification tests: Performance These tests verify that the power supply meets all of the specifications listed in Appendix A. They can also be used to verify that the power supply is properly calibrated. Calibration These procedures calibrate the power supply.
Verification Measurement Techniques Electronic Load Many of the test procedures require the use of a variable load capable of dissipating the required power. If a variable resistor is used, switches should be used to either; connect, disconnect, or short the load resistor. For most tests, an electronic load can be used. The electronic load is considerably easier to use than load resistors, but it may not be fast enough to test transient recovery time and may be too noisy for the noise (PARD) tests.
Verification Constant Voltage Tests NOTE Refer to the appropriate test record form for the instrument settings of the model you are checking. Voltage Programming and Readback Accuracy Test category = performance, calibration This test verifies that the voltage programming and measurement functions are within specifications. 1 Turn off the power supply and connect a DVM directly across the +S and -S terminals as shown in figure A. Do not connect a load.
Verification CV Source Effect Test category = performance This test measures the change in output voltage that results from a change in AC line voltage from the minimum to maximum value within the line voltage specifications. 1 Turn off the power supply and connect the ac power line through a variable voltage transformer. 2 Connect a DVM and an electronic load as shown in figure A. Set the variable voltage transformer to nominal line voltage.
Verification 4 Program the power supply to program the output current to its maximum programmable value (Imax) and the output voltage to its full-scale value and enable the output. Let the oscilloscope run for a few seconds to generate enough measurement points. On the Agilent Infiniium scope, the maximum peak-to-peak voltage measurement is indicated at the bottom of the screen on the right side. Divide this value by 10 to get the CV peak-to-peak noise measurement.
Verification Constant Current Tests NOTE Refer to the appropriate test record form for the instrument settings of the model you are checking. Current Programming and Readback Accuracy Test category = performance, calibration This test verifies that the current programming and measurement functions are within specifications. 1 Turn off the power supply and connect the current shunt directly across the output. Connect the DVM across the current shunt.
Verification 4 With the electronic load in CV mode, set it for the output’s fullscale voltage. The CC annunciator on the front panel must be on. If it is not, adjust the load so that the voltage drops slightly. 5 Divide the voltage drop (DVM reading) across the current monitoring resistor by its resistance to convert to amps and record this value (Iout). 6 Short the electronic load.
Verification Test Record Form – Agilent N5741A and N5761A Agilent N5741A and N5761A Report No _______________ Date __________________ Model Minimum Specs. Results Maximum Specs. Minimum Voltage Vout Front Panel Display Readback Both Both − 3 mV Vout − 6 mV __________ __________ + 3 mV Vout + 6 mV High Voltage Vout Front Panel Display Readback Both Both 5.994 V Vout − 12 mV __________ __________ 6.006 V Vout + 12 mV CV Load Effect Both − 2.6 mV __________ + 2.
Verification Test Record Form – Agilent N5742A and N5762A Agilent N5742A and N5762A Description Report No _______________ Date __________________ Model Minimum Specs. Results Maximum Specs. Minimum Voltage Vout Front Panel Display Readback Both Both − 4 mV Vout − 8 mV __________ __________ + 4 mV Vout + 8 mV High Voltage Vout Front Panel Display Readback Both Both 7.992 V Vout − 16 mV __________ __________ 8.008 V Vout + 16 mV CV Load Effect Both − 2.8 mV __________ + 2.
Verification Test Record Form – Agilent N5743A and N5763A Agilent N5743A and N5763A Description Report No _______________ Date __________________ Model Minimum Specs. Results Maximum Specs. Minimum Voltage Vout Front Panel Display Readback Both Both − 6.25 mV Vout − 12.5 mV __________ __________ + 6.25 mV Vout + 12.5 mV High Voltage Vout Front Panel Display Readback Both Both 12.4875 V Vout − 25 mV __________ __________ 12.5125 V Vout + 25 mV CV Load Effect Both − 3.
Verification Test Record Form – Agilent N5744A and N5764A Agilent N5744A and N5764A Description Report No _______________ Date __________________ Model Minimum Specs. Results Maximum Specs. Minimum Voltage Vout Front Panel Display Readback Both Both − 10 mV Vout − 20 mV __________ __________ + 10 mV Vout + 20 mV High Voltage Vout Front Panel Display Readback Both Both 19.98 V Vout − 40 mV __________ __________ 20.
Verification Test Record Form – Agilent N5745A and N5765A Agilent N5745A and N5765A Description Report No _______________ Date __________________ Model Minimum Specs. Results Maximum Specs. Minimum Voltage Vout Front Panel Display Readback Both Both − 15 mV Vout − 30 mV __________ __________ + 15 mV Vout + 30 mV High Voltage Vout Front Panel Display Readback Both Both 29.97 V Vout − 60 mV __________ __________ 30.
Verification Test Record Form – Agilent N5746A and N5766A Agilent N5746A and N5766A Description Report No _______________ Date __________________ Model Minimum Specs. Results Maximum Specs. Minimum Voltage Vout Front Panel Display Readback Both Both − 20 mV Vout − 40 mV __________ __________ + 20 mV Vout + 40 mV High Voltage Vout Front Panel Display Readback Both Both 39.96 V Vout − 80 mV __________ __________ 40.
Verification Test Record Form – Agilent N5747A and N5767A Agilent N5747A and N5767A Description Report No _______________ Date __________________ Model Minimum Specs. Results Maximum Specs. Minimum Voltage Vout Front Panel Display Readback Both Both − 30 mV Vout − 60 mV __________ __________ + 30 mV Vout + 60 mV High Voltage Vout Front Panel Display Readback Both Both 59.94 V Vout − 120 mV __________ __________ 60.
Verification Test Record Form – Agilent N5748A and N5768A Agilent N5748A and N5768A Description Report No _______________ Date __________________ Model Minimum Specs. Results Maximum Specs. Minimum Voltage Vout Front Panel Display Readback Both Both − 40 mV Vout − 80 mV __________ __________ + 40 mV Vout + 80 mV High Voltage Vout Front Panel Display Readback Both Both 79.92 V Vout − 160 mV __________ __________ 80.
Verification Test Record Form – Agilent N5749A and N5769A Agilent N5749A and N5769A Description Report No _______________ Date __________________ Model Minimum Specs. Results Maximum Specs. Minimum Voltage Vout Front Panel Display Readback Both Both − 50 mV Vout − 100 mV __________ __________ + 50 mV Vout + 100 mV High Voltage Vout Front Panel Display Readback Both Both 99.9 V Vout − 200 mV __________ __________ 100.
Verification Test Record Form – Agilent N5750A and N5770A Agilent N5750A and N5770A Description Report No _______________ Date __________________ Model Minimum Specs. Results Maximum Specs. Minimum Voltage Vout Front Panel Display Readback Both Both − 75 mV Vout − 150 mV __________ __________ + 75 mV Vout + 150 mV High Voltage Vout Front Panel Display Readback Both Both 149.85 V Vout − 300 mV __________ __________ 150.
Verification Test Record Form – Agilent N5751A and N5771A Agilent N5751A and N5771A Report No _______________ Description Date __________________ Model Minimum Specs. Results Maximum Specs. Minimum Voltage Vout Front Panel Display Readback Both Both − 150 mV Vout − 300 mV __________ __________ + 150 mV Vout + 300 mV High Voltage Vout Front Panel Display Readback Both Both 299.7 V Vout − 600 mV __________ __________ 300.
Verification Test Record Form – Agilent N5752A and N5772A Agilent N5752A and N5772A Report No _______________ Description Date __________________ Model Minimum Specs. Results Maximum Specs. Minimum Voltage Vout Front Panel Display Readback Both Both − 300 mV Vout − 600 mV __________ __________ + 300 mV Vout + 600 mV High Voltage Vout Front Panel Display Readback Both Both 599.4 V Vout − 1.2 V __________ __________ 600.6 V Vout + 1.
Calibration Calibration Refer to the “Equipment Required” section in this appendix for a list of the equipment required for calibration. A general outline of the procedure is as follows: Enter the calibration mode by providing the correct password. The password is set at the factory to the model number. Once calibration has been entered, the password can be changed by the user. lf the password is incorrect, an error occurs. You do not have to do a complete calibration.
Calibration *OPC? Step 4. Measure the output voltage with the Agilent 3458A and enter the data. CAL:DATA Step 5. Select the second voltage calibration point. CAL:LEV P2 *OPC? Step 6. Measure the output voltage with the Agilent 3458A and enter the data. CAL:DATA Current Programming and Measurement Calibration Step 1. Connect a precision shunt resistor to an output. Connect the Agilent 3458A to measure the voltage across the shunt.
C Service Types of Service Available 114 Repackaging for Shipment 114 Operating Checklist 114 Error Messages 116 This chapter discusses the procedures involved for returning a failed instrument to Agilent Technologies for service or repair. A procedure is included for diagnosing specific symptoms. Actual repair is done through unit exchange.
Types of Service Available Types of Service Available If your instrument fails during the warranty period, Agilent Technologies will replace or repair it free of charge. After your warranty expires, Agilent Technologies will replace or repair it at a competitive price. The standard repair process is “whole unit exchange”. The replacement units are fully refurbished and are shipped with new calibration certificates. Contact your nearest Agilent Technologies Service Center.
Operating Checklist Symptom Check Action No output. All displays and indicators are blank. Is the AC power cord defective? Check continuity. Replace if necessary. Is the AC input voltage within range? Check AC input voltage. Connect to appropriate voltage source. Output is present momentarily, but shuts off quickly. Display indicates AC. Does the AC source voltage sag when a load is applied? Check AC input voltage. Connect to appropriate voltage source.
Error Messages Error Messages Displaying the SCPI error queue The entire error queue is read, then emptied, using the following command: SYST:ERR? Error List The following table documents the various error messages that the power supply supports: 116 Error Device-dependent Errors (these errors set Standard Event Status register bit #3) 0 No error This is the response to the ERR? query when there are no errors.
Error Messages Command Errors (these errors set Standard Event Status register bit #5) −100 Command error Generic syntax error. −101 Invalid character An invalid character was found in the command string. −102 Syntax error Invalid syntax was found in the command string. Check for blank spaces. −103 Invalid separator An invalid separator was found in the command string. Check for proper use of , ; : −104 Data type error A different data type than the one allowed was found in the command string.
Error Messages Command Errors (continued) −141 Invalid character data Either the character data element contains an invalid character, or the element is not valid. −144 Character data too long The character data element contains more than 12 characters. −148 Character data not allowed A discrete parameter was received, but a string or numeric parameter was expected. −150 String data error Generic string data error −151 Invalid string data An invalid character string was received.
Error Messages Execution Errors (continued) −231 Data questionable The measurement accuracy is suspect. −232 Invalid format The data format or structure is inappropriate. −233 Invalid version The version of the data format is incorrect to the instrument. −240 Hardware error The command could not be executed because of a hardware problem with the instrument. −241 Hardware missing The command could not be executed because of missing hardware, such as an option.
D Compatibility Differences – In General 122 Compatibility Command Summary 123 The Agilent N5700 power supplies are programmatically compatible with the Agilent 603xA power supplies. This means that you can remotely program the Agilent N5700 power supplies using the same commands that are used to program the 603xA power supplies. CAUTION Series N5700 User’s Guide Do not mix Compatibility with SCPI commands in the same program. This will result in unpredictable instrument behavior.
Differences – In General Differences – In General The following table documents the general differences between the way Compatibility commands work on the Agilent N5700 power supplies and the way they worked on the Agilent 603xA power supplies. Item Differences Queries The Agilent N5700 will respond to multiple queries. It will not allow a space separator between numbers.
Compatibility Command Summary Compatibility Command Summary The following table documents the compatibility commands that the Agilent N5700 power supplies support. All compatibility commands are accepted; however, some commands do nothing. Compatibility Command Description Similar SCPI Command ASTS? Queries the accumulated status (ASTS). The response represents the sum of the binary weights of the ASTS register bits. The ASTS register is set to the present status after being queried.
Compatibility Command Summary Compatibility Command Description Similar SCPI Command OVP Sets the over-voltage trip point. VOLT:PROT:LEV OVP? Queries the present over-voltage setting. The response is a real number. VOLT:PROT:LEV? RCL Recalls the saved settings. There are up to 16 store/recall states. Saved settings must have been previously stored using the STO command. *RCL ROM? Queries the revision date of the power supply's firmware. *IDN? RST Resets any tripped protection.
Index A ABOR, 79 AC INPUT, 12, 88 1500 W units, 21 750 W units, 21 accessories, 18 analog programming external resistance, 46 external voltage, 45 terminals, 45 AUT, 10 AUTO IP, 55 auto-restart, 43 C calibration, 111 current programming and measurement, 112 equipment, 92 procedure, 111 voltage programming and measurement, 111 calibration commands, 66 CAL CURR, 66 CAL DATA, 66 CAL DATE, 66 CAL LEV, 66 CAL PASS, 66 CAL STAT, 67 CAL VOLT, 67 caution, 3 cleaning, 20 combining commands common commands, 61 from d
Index device clear, 63 DHCP, 54 DNS, 55 Domain, 56 L E electronic load, 93 enable/disable terminals, 43 environmental conditions, 19, 88 ERR, 76 error messages, 116 ESB, 76 F features, 8 FINE, 11 front panel locking, 41 functions, 9 M G GPIB address, 50 GPIB interface, 50 grounding, 19, 30 H history, 2 Hostname, 52, 56 I impedance effects, 29 inductive loads, 29 initiate commands INIT, 79 INIT CONT, 79 inspection, 19 IP Address, 55 items supplied, 18 numerical data formats, 62 O J1 connector, 12 J2 c
Index output grounding, 30 output noise, 29 output on/off control, 42 output programming example, 82 over-current check, 37 over-current protection, 32, 40 over-temperature protection, 41 over-voltage check, 36 over-voltage protection, 32, 39 OVP, 11 P POWER, 11 power cord, connecting, 21 power receptacle, 19 power supply OK signal, 43 power-fail protection, 41 print date, 2 PROT, 11 protection functions, 39 Q queries, 61 QUES, 76 R rack mounting, 20 REM, 11 remote voltage sensing, 27 repackaging, 114 repac
Index UVL, 11 V verification, 92 verification equipment, 92 VOLTAGE, 10 voltage monitoring, external, 47 voltage programming accuracy, 94 128 voltage readback accuracy, 94 voltage sensing, 26 W warning, 3 web URL’s, 4 wire sizes, 23 Series N5700 User’s Guide
