Page 2 - Copyright 2000 Agilent Technologies
2 CERTIFICATION Agilent Technologies certifies that this product met its published specifications at time of shipment from the factory. AgilentTechnologies further certifies that its calibration measurements are traceable to the United States National Bureau ofStandards, to the extent allowed by the...
Page 3 - SAFETY SUMMARY
3 SAFETY SUMMARY The following general safety precautions must be observed during all phases of operation, service, and repair of thisinstrument. Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safetystandards of design, manufacture, and intended ...
Page 4 - GENERAL; ENVIRONMENTAL CONDITIONS; SAFETY SYMBOL DEFINITIONS; Herstellerbescheinigung
4 SAFETY SUMMARY (continued) GENERAL Any LEDs used in this product are Class 1 LEDs as per IEC 825-1. ENVIRONMENTAL CONDITIONS This instrument is intended for indoor use in an installation category II, pollution degree 2 environment. It is designed tooperate at a maximum relative humidity of 95% and...
Page 5 - DECLARATION OF CONFORMITY; Agilent Technologies
5 DECLARATION OF CONFORMITY according to ISO/IEC Guide 22 and EN 45014 Manufacturer’s Name: Agilent Technologies Manufacturer’s Address: 150 Green Pond RoadRockaway, New Jersey 07866U.S.A. declares that the Product Product Name: a) Multiple-Output System Power Supplyb) Precision Multiple-Output Syst...
Page 6 - WHAT THIS MANUAL CONTAINS
6 WHAT THIS MANUAL CONTAINS This is the Operating manual for the Agilent 6621A through 6624A and 6627A Series of Multiple Output Linear SystemPower Supplies. It contains information relating to the installation, operation, and programming of these supplies asoutlined below. Maintenance and troublesh...
Page 7 - Table Of Contents; General Information
7 Table Of Contents 1 General Information Introduction............................ ....................................................................................................................... 11Safety Considerations................... .........................................................
Page 10 - General Information 11; Introduction; Options
General Information 11 1 General Information Introduction This chapter contains a general description of your power supply, as well as its performance specifications. Informationabout options, accessories, and GP-IB cables is also provided. This manual describes all five models in the Agilent 6621A-...
Page 11 - Model
General Information 12 Accessories 10833A GP-IB cable, 1 m (3.3 ft)10833B GP-IB cable, 2 m (6.6 ft)10833C GP-IB cable, 4 m (13.2 ft)10833D GP-IB cable, 0.5 m (1.6 ft)10834A GP-IB connector extenderSlide mount kit (1494-0059) Description The Agilent 6621A-6624A, and 6627A Multiple Output Linear Power...
Page 12 - General Information 13; Basic Operation; Output; 0 W High Voltage
General Information 13 Programmable delay time for service request and OCP mask.Voltage, current, and overvoltage calibration.GP-IB interface selftest.Message display capability on the front panel. Output connections are made to rear panel screw terminals. Either the positive or negative output term...
Page 13 - Output Boards
General Information 14 The power supply has no potentiometers. Each output is individually calibrated over the GP-IB using calibration commands(see Appendix A). Correction factors are calculated by the power supply during calibration and are stored in a non-volatilememory which is located on the sup...
Page 14 - General Information 15; Specifications; Qualifying Conditions; constant plus a percentage of the reading).
General Information 15 Specifications Table 1-2 lists the performance specifications for the Agilent 662xA power supplies. Performance specifications describethe instrument’s warranted performance. The service manual, Option 9l0, contains procedures for verifying the performancespecifications. Table...
Page 15 - Programming resolution: Average programming step size.
General Information 16 Programming resolution: Average programming step size. Current Sinking ( - Current): Each output can sink as well as source current. The sinking capability is not programmableand depends upon the output voltage. The current sinking capability is described in greater detail in ...
Page 16 - General Information 17
General Information 17 Table 1-2. Specifications PERFORMANCE SPECIFICATIONS (0 to 55°C unless otherwise specified) Outputs: 40 W Low 40 W High 80 W Low 80 W High Voltage Voltage Voltage Voltage DC Output Ranges: All outputs will accept voltage programming commands 1% higher than those listed and cur...
Page 19 - 0 W Low Voltage
General Information 20 Table 1-3. Supplemental Characteristics (continued) Output Impedance: Approximated by a resistance in parallel with an inductance (see graphs in Figure 1-7). The values for each output are: 40 W Low Voltage 40 W High Voltage 80 W Low Voltage 80 W High Voltage 0.15 Ω , 2.0 µ H ...
Page 20 - General Information 21
General Information 21 Figure 1-4. CV Operation with Capacitive Load, Stability Graph for all Outputs
Page 22 - General Information 23
General Information 23 Figure 1-6. CC Operation with Inductive Load, Small Signal Stability Graph for LV (0 to 20 V) Outputs
Page 24 - Installation
Installation 25 2 Installation Introduction This chapter contains instructions for checking and mounting your power supply, connecting your supply to ac power,converting it from one line voltage to another, and connecting the GP-IB cable. The power supply generates operating magnetic fields which ma...
Page 25 - Input Power Requirements; Nominal; Line Fuse
Installation 26 Figure 2-1. Outline Diagram Input Power Requirements You can operate this power supply from a nominal 100 V, 120 V, 220 V or 240 V single phase power source at 47 to 66Hz. The input voltage range, maximum input current, high line inrush current (PK), and the fuse required for each of...
Page 26 - Line Voltage; Note All fuses are rated for 250 V.
Installation 27 Figure 2-2. Rear Panel Detail (6624A Shown) Table 2-2 Line Fuses Line Voltage Fuse Needed Agilent Part Number (for 1/4 X 1-1/4 in. fuses only) 100/120 V 8AM 2110-0342 220/240 V 4AM 2110-0055 Note All fuses are rated for 250 V. Figure 2-3. Line Module Detail GP-IB
Page 27 - Power Cord; Figure 2-4. Power Cord Plug Configurations; Line Voltage Conversion; rating of the fuse, rotate FUSE PULL to the left and remove the fuse.
Installation 28 Power Cord The power supply is shipped from the factory with a power cord that has a plug appropriate for your location. Figure 2-4shows the standard configuration of plugs used by Agilent Technologies. Below each drawing is the Agilent part numberfor the replacement power cord equip...
Page 28 - GP-IB Interface Connector; maximum of 20 meters.; NOTE
Installation 29 FIRE HAZARD Make sure the replacement fuse is one of the same type (size) and rating (amps) thatis consistent with the voltage level you are operating at. Do not use a substitute fuse; use a fusewith the same Agilent Part number listed in Table 2-2. 6. Close the door of the line modu...
Page 29 - Getting Started
Getting Started 31 3 Getting Started Introduction This chapter is intended for the first time user of the supply. It provides four main discussions: • Front Panel Controls and Indicators • Turning on Your Supply • Checking Out Your Supply Using Local Control • Introduction to Remote Operation First,...
Page 30 - Number
Getting Started 32 If you have any questions concerning installation or power requirements, review Chapter 2. To turn on your supply, press the front panel LINE switch. When the power is initially applied, the supply performs a seriesof self tests which last about 3 seconds. Included in these tests ...
Page 33 - and; LINE Switch; Turns ac power on and off.; Figure 3-2. Test Pattern of all Display Segments at Power-on
Getting Started 35 Table 3-1. Controls and Indicators (continued) Number Controls/lndicators Description Page 8 Numeric Entry Keys (These keys are used inconjunction with many of theSystem Control and OutputControl keys to enter thedesired values into the powersupply. 0 to 9 - Set the value of the s...
Page 36 - Introduction To Remote Operation
Getting Started 38 7. Set the current to 0.5 A by pressing: ISET . 5 ENTER 8. Check that the display reads approximately 0 V and 0.5 A. 9. Enable the overcurrent protection circuit by pressing: OCP 10. Check that the OCP ENBLD annunciator is on indicating that overcurrent protection is enabled and t...
Page 38 - DISP A
Getting Started 40 Getting Data From The Supply The supply is capable of measuring the values of its output parameters in response to queries. In this example, the queryasks the supply to measure the output voltage at output 1. When you send a query from remote, the supply does not display the respo...
Page 40 - Overcurrent Protection; To disable the overcurrent protection mode for output 2, send:
Getting Started 42 Overcurrent Protection . The output will go to the off state (0 volts and min. current) when the overcurrent protection (OCP) feature is enabled and the output is in the + CC mode. To enable the overcurrent protection mode for output 2, send: OUTPUT 705; "OCP 2,1" To disab...
Page 41 - Output Connections and Operating Information
Output Connections and Operating Information 43 4 Output Connections and Operating Information Introduction This chapter explains how to make connections to the output terminals located on-the rear of your power supply. Somegeneral operating information is included in this chapter to help you unders...
Page 42 - Protection Features
Output Connections and Operating Information 44 Operating Quadrants Figure 4-2 shows the operating locus of your power supply in three quadrants. The area in quadrant 1 shows the operatinglocus defined by the voltage and current settings of each output. The characteristics shown for quadrant 1 incor...
Page 43 - Figure 4-2. Typical Output Range Characteristics
Output Connections and Operating Information 45 Figure 4-2. Typical Output Range Characteristics
Page 44 - CONNECTING THE LOAD
Output Connections and Operating Information 46 A fixed overvoltage threshold of approximately 120% of the maximum rated output voltage is built into each output.Because the fixed overvoltage circuit is biased from the output terminals, it can be activated and provide protection evenwhen the supply ...
Page 45 - Figure 4-3 Typical Downprogramming Characteristic Below 2.0 V
Output Connections and Operating Information 47 Figure 4-3 Typical Downprogramming Characteristic Below 2.0 V Wire Size Selection FIRE HAZARD Select a wire size large enough to carry short-circuit current without overheating.Two factors must be considered when selecting wire size for load connection...
Page 46 - Resistivity
Output Connections and Operating Information 48 available in the load leads for prolonged operation into a 5 A load during ac low line at high ambient temperatureconditions. There is a similar stipulation for 80 W low voltage outputs at l0 A under the same conditions as above. See Figure 4-2A forwor...
Page 47 - Figure 4-4. Optimum Hookup for Multiple Loads, Local Sensing; This supply can be operated with any output terminal; Remote Voltage Sensing
Output Connections and Operating Information 49 Multiple Loads If you are using the as-shipped terminal block strapping pattern (local sensing) and are connecting multiple loads to oneoutput, connect each load to the output terminals using separate connecting wires (see Figure 4-4). This minimizes m...
Page 48 - Figure 4-6. Allowable Load Lead Voltage Drop with Remote Sensing
Output Connections and Operating Information 50 regardless of how the power supply is programmed. Note that with remote sensing, voltage readback monitors the loadvoltage at the sense points. Figure 4-5. Remote Voltage Sensing Figure 4-6. Allowable Load Lead Voltage Drop with Remote Sensing The maxi...
Page 50 - Overvoltage Trigger Connections; S to any pair of OV
Output Connections and Operating Information 52 Overvoltage Trigger Connections Each output of your power supply has two OV terminals on its rear panel terminal block. These terminals are labeled +OVand -OV. By connecting the OV terminals all in parallel as shown in Figure 4-7, an overvoltage shutdo...
Page 51 - Figure 4-9. Equivalent Internal OV Trigger Circuit
Output Connections and Operating Information 53 Figure 4-8. External Trigger Circuit The internal equivalent OV circuit is shown in Figure 4-9. Note the internal DC blocking capacitor, bleed resistor and noisebypass capacitors. Do not exceed 50 volts maximum between the + OV and the - OV terminals. ...
Page 52 - Power Supply Protection Considerations; Figure 4-10. Recommended Protection Circuit for Battery Charging; F on high voltage units and 20,000; Parallel Operation
Output Connections and Operating Information 54 Power Supply Protection Considerations Battery Charging If you are using your supply in a battery charging application, it is recommended that a series protection diode be added toprevent damage to the supply during an overvoltage shutdown. Remember th...
Page 53 - Figure 4-11. Parallel Connections with Local Sensing; Low Voltage Output
Output Connections and Operating Information 55 CV Operation For CV operation, one output must operate in CC mode and the other output must operate in CV mode. Although eachoutput operates independently of the other, the output that is operating in CV mode will be ’’controlling" the voltageregul...
Page 54 - Figure 4-12. Parallel Connections with Remote Sensing; Current
Output Connections and Operating Information 56 CC Operation For CC operation, set the output voltages as outlined in CV operation (page 55), or alternatively, program the voltagesettings of both outputs to the same voltage limit point. Then program the current of each output so that the sum of both...
Page 55 - Series Operation; diode will conduct; Figure 4-13. Series Connections with Local Sensing
Output Connections and Operating Information 57 Series Operation SHOCK HAZARD Floating voltages must not exceed 240 Vdc. No output terminal may be morethan 240 Vdc from chassis ground. Connect in series only outputs that have equivalent current ratings. Each output has a reverse voltageprotection di...
Page 56 - Figure 4-14. Series Connections with Remote Sensing
Output Connections and Operating Information 58 CC Operation For CC operation, the current setting of each output must be programmed to the desired operating current. The sum of thevoltage settings determines the voltage limit point. As an example, one way to program the voltage of the output is to ...
Page 58 - Remote Operation
Remote Operation 61 5 Remote Operation Introduction Chapter 3 introduced you to the basics of remote operation and provided a few simple examples using a Series 200computer as the GP-IB controller. This chapter contains all the information required to control your power supply remotelyand discusses ...
Page 59 - Care should be taken to not select the controller address.
Remote Operation 62 The SRQ annunciator on the front panel display is turned on when the power supply is requesting service from thecomputer and remains on until the controller conducts a serial poll. A serial poll removes the service request and turns offthe SRQ annunciator regardless of whether th...
Page 60 - Figure 5-1. Typical Program Statement for Series 200 Computers
Remote Operation 63 Power-On Service Request (PON) The power supply can request service from the controller when the power is turned on. This request can be enabled ordisabled by sending a PON command (see page 77). When the request is enabled, the supply can generate an SRQ atpower-on or when there...
Page 64 - Initial Conditions; Parameter; Power Supply Commands
Remote Operation 67 NOTES: 1. Output channels 3 and 4 are not used in all models. (See Table 5-4). 2. Applies to 80 W Low V output. 3. Applies to 40 W High V and 80 W High V outputs. 4. ’’X’’ depends upon model. 5. A space is returned for a + sign. 6. All responses are followed by a < CR > and...
Page 70 - Figure 5-3. Functional Relationship of Status Registers
Remote Operation 73 Figure 5-3. Functional Relationship of Status Registers The supply has one serial poll register which services all outputs and provides the user with other power supply status-related information as discussed on page 75. Status Register . Each output channel of the power supply m...
Page 72 - Table 5-6. Bit Assignment of the Serial Poll Register
Remote Operation 75 As shown in Figure 5-3, if one or more bits in the fault register of a given output channel are set, then the FAU bit for thatoutput in the serial poll register will also be set and a service request may be generated (see page 76). To read the faultregister of output 2 and find o...
Page 73 - --indicates that it is enabled for both fault and error conditions
Remote Operation 76 To find out the nature of the service request, you must do a serial poll. This will isolate the output that generated the requestby checking which of the FAU bits are set in the case of a fault, or checking to see if the error bit is set in the case of anerror. If the SRQ on faul...
Page 74 - Any; Reprogramming Delay
Remote Operation 77 If you want to disable this facility, send the command. PON 0 If you want to find out if the power-on SRQ is enabled or disabled, send the following query: PON ? and address the supply to talk. The supply will respond with a 1 or 0 as discussed above. NOTE The power-on (PON) SRQ ...
Page 75 - Message Display Capability; Other Queries; The supply will respond with its model number.; Test Query
Remote Operation 78 and address the supply to talk. The response will be a numeric value between 0 and 32. Display On/Off When the display is on, the commands sent across the GP-IB may experience a slower processing time because theprocessor must also spend time to monitor the outputs and update the...
Page 76 - Calibration Mode Query
Remote Operation 79 the test query are described in Table 5-9. This test cannot be done from the front panel. To instruct the power supply tocarry out a self-test, send the following query and address the supply to talk: TEST? Calibration Mode Query . To be able to calibrate your power supply, the c...
Page 79 - Local Operation; General; key to erase previous
Local Operation 83 6 Local Operation Introduction Chapter 3 introduced you to the supply’s front panel controls and indicators to help you turn on the supply and perform thecheckout procedures that were given in that chapter. The following paragraphs describe how to use all of the front panelcontrol...
Page 80 - Setting Voltage; Setting Current; VSET; NUMERIC ENTRY KEYS
Local Operation 84 Figure 6-1. Front Panel (Model 6624A shown) Pressing the ENTER key will enter the values displayed for the function indicated, initiate that function, and return thedisplay to the metering mode in which the measured output voltage and current for the selected output are displayed....
Page 82 - Local Control Of System Functions; Setting the Supply’s GP-IB Address
Local Operation 86 Table 6-1. Bit Arrangement of the Status, Mask, and Fault Registers Bit Position 7 6 5 4 3 2 1 0 Bit Weight 128 64 32 16 8 4 2 1 Condition CP OC UNR OT OV -CC +CC CV Note that bits can be set in an output’s fault register only when there is a change in either the status register o...
Page 83 - Displaying Error Messages
Local Operation 87 The supply’s present address will appear in the display. Address 5 is the factory set address. If you want to leave the address set at 5, you can return to the metering mode by pressing the METER key or you can pressanother function key. If you want to change the address, you can ...
Page 84 - Calibration Procedures 89; Calibration Procedures; The following test equipment is required for calibration:
Calibration Procedures 89 A Calibration Procedures Introduction This appendix discusses the software calibration procedures for the power supply. These supplies should be calibratedannually or whenever certain repairs are made (see Service Manual). Because there are no internal or external hardware ...
Page 86 - General Calibration Procedure
Calibration Procedures 91 Table A-1. Calibration Commands Command Header Channel* Range Data Syntax (see Figure 5-2) Calibration Mode CMODE 0,1 (off,on) C2 Set High Voltage VHI 1,2,3,4 - C3 Set Low Voltage VLO 1,2,3,4 - C3 Set High Current IHI 1,2,3,4 - C3 Set Low Current ILO 1,2,3,4 - C3 Calibrate ...
Page 87 - Continue calibrating output 1 with the following commands:
Calibration Procedures 92 Start with output channel 1 and use the following commands to calibrate your power supply: NOTE Do not turn the power supply off during the calibration procedures. Otherwise, the correction constantsare not stored. Exercise care when moving the leads. 1. CMODE < param &g...
Page 88 - Calibration Procedures 93; Calibration Program
Calibration Procedures 93 Repeat commands two through eight for any other outputs that must be calibrated on your power supply. After you havecompleted calibration of all outputs, turn the calibration mode off by sending the CMODE0 command (see step 1) to thepower supply. The correction constants ar...
Page 91 - Programming with a Series 200/300 Computer; Programming With a Series 200/300 Computer; If a 4
Programming with a Series 200/300 Computer 97 B Programming With a Series 200/300 Computer Introduction The purpose of this appendix is to serve as an introduction to programming your power supply with an HP Series 200/300computer using the BASIC language. Examples are included that employ some of t...
Page 92 - Voltage and Current Programming With Variables
Programming with a Series 200/300 Computer 98 Voltage and Current Programming With Variables You can use variables in a program to represent data values in the device commands. This is useful in applications thatrequire changing the voltage and current values to different predetermined settings. The...
Page 93 - Programming Power Supply Registers; Present Status; preserve its value in the function subprogram.; Service Request and Serial Poll
Programming with a Series 200/300 Computer 99 10 ASSIGN @Ps TO 70520 OUTPUT @Ps;"VSET?1’’30 ENTER @Ps;Vsl40 OUTPUT @Ps;’’ISET?1"50 ENTER @Ps;Isl60 PRINT ’’VOLTAGE SETTING OF OUTPUT #1 = ’’;Vsl70 PRINT ’’CURRENT LIMIT SETTING OF OUTPUT #1 = ";Is180 END Line 10: Assigns the I/O pathname to...
Page 95 - Error Detection
Programming with a Series 200/300 Computer 101 Error Detection The power supply can recognize programming errors and can inform you when a programming error occurs. When an erroris detected, no attempt is made to execute the command. Instead, a bit in the serial poll register is set. If SRQ2 or SRQ3...
Page 96 - Stored Operating States; Programming Outputs Connected In Parallel
Programming with a Series 200/300 Computer 102 LINE 10: Assigns the I/O path name to the power supply.LINE 20: Declare a common block for the I/O path name.LINE 30: Define interrupt on softkey depression and branch to error routine.LINE 40: Idle on softkey definition.LINE 80: Define subprogram Err_t...
Page 97 - CC Operation; desired voltage limit.; CV Operation
Programming with a Series 200/300 Computer 103 CC Operation Programming for CC operation is straightforward. Program each output to the desired voltage limit point. Then programeach output to supply half of the total desired operating current. Both outputs will operate in CC mode. Note that the tota...
Page 98 - Programming Outputs Connected In Series
Programming with a Series 200/300 Computer 104 LINE 10: Assigns the I/O pathname to the power supply.LINE 20,30: Enter the operating voltage and current limit point.LINE 40: Sets C equal to one half of the current limit point.LINE 50-70: Determines the voltage setting for output 2. It is 20.2 V when...
Page 99 - Command Summary; Command; CLR
Command Summary 105 C Command Summary Introduction Table C-1 provides an alphabetical listing and a brief description of each command that can be sent to the Agilent 6621A-24A, and 6627A power supplies. All of the commands can be executed remotely over the GP-IB. Many of the commandscan also be exec...
Page 100 - Sets the current of the specified output channel (see page 69).
Command Summary 106 Table C-l. Command Summary (continued) Command Description DSP? Queries the present status of the display (see page 78). Response is either a 1 (on)or a 0 (off). DSP " xxxxxxxxxxxx” Puts the quoted string on the power supply's front panel display (see page 79).Only numerals, ...
Page 101 - * Indicates that the command can be executed from the front panel.
Command Summary 107 Table C-l. Command Summary (continued) Command Description OCP? < ch > Queries the overcurrent protection circuit on/off status for the specified outputchannel (see page 72). Response is either a 1 (on) or a 0 (off). The OCP ENBLDannunciator on the front panel displays the ...
Page 102 - Sets the voltage of the specified output channel (see page 69).
Command Summary 108 Table C-l. Command Summary (continued) Command Description SRQ? Queries the present setting of the reasons for issuing an SRQ (see page 76). Response is 0, 1, 2, or 3 that corresponds with the SRQ <setting> describedpreviously. *STO < reg > Stores the present voltage ...
Page 103 - Error Codes and Messages; Message
Error Codes and Messages 109 D Error Codes and Messages Introduction This appendix describes the GP-IB error codes that can be readback to the controller and the error messages that can bedisplayed on the power supply’s front panel. A brief explanation of each code and message is also given. The err...
Page 105 - Error Code; UNCALIBRATED; Response Code; No errors were detected.
Error Codes and Messages 111 Table D-2. ERROR Responses (continued) Error Code (ERR? query) Message (ERR key) Explanation 17 UNCALIBRATED Unexplained EEPROM error; possibly as the result of incorrect calibrationprocedure. Recalibrate as described in Appendix A. If the problem persists, ahardware fai...
Page 106 - Manual Backdating; window next to the voltage level you require.
Manual Backdating 113 E Manual Backdating Introduction The backdating information in this section applies to units that have the following serial numbers: Agilent Model 6621A serials 2611A-00101 to 01680Agilent Model 6622A serials 2611A-00101 to 02090Agilent Model 6623A serials 2611A-00101 to 02230A...
Page 107 - Addendum; ADDENDUM; I. Generally Applicable Annotations
Addendum 114 ADDENDUM I. Generally Applicable Annotations Consistent with good engineering practice, leads attached to customer accessible signal/monitoring ports (such asthe l0-pin Control Connector, the 7-pin Analog Connector, the 7-pin Digital Port/Trigger Connector, screwterminal Barrier Blocks,...
Page 108 - Agilent Sales and Support Office; Technical data is subject to change.
Agilent Sales and Support Office 115 Agilent Sales and Support Office For more information about Agilent Technologies test and measurement products, applications, services, and fora current sales office listing, visit our web site: http://www.agilent.com/find/tmdir You can also contact one of the fo...
Page 109 - Manual Updates
116 Manual Updates The following updates have been made to this manual since the print revision indicated on the title page. 2/01/00 All references to HP have been changed to Agilent.All references to HP-IB have been changed to GPIB.
