HP 6622A - Manuals

6 WHAT THIS MANUAL CONTAINS This is the Operating manual for the HP 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 troubleshootin...

7 Table Of Contents 1 General Information Introduction............................ ................................................................................................................ 11Safety Considerations................... ................................................................

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 HP-IB cables is also provided. This manual describes all five models in the HP 6621A-6624A...

General Information 12 Accessories 10833A HP-IB cable, 1 m (3.3 ft)10833B HP-IB cable, 2 m (6.6 ft)10833C HP-IB cable, 4 m (13.2 ft)10833D HP-IB cable, 0.5 m (1.6 ft)10834A HP-IB connector extenderSlide mount kit (1494-0059) Description The HP 6621A-6624A, and 6627A Multiple Output Linear Power Supp...

General Information 13 Storage and recall of programmed voltage and current values for all outputs.Queries of programmed functions or settings.Output enable or disable.Programming syntax error detection.Programmable delay time for service request and OCP mask.Voltage, current, and overvoltage calibr...

General Information 14 The HP-IB board also processes measurement and status data received from the output boards. This data may be read backover the HP-IB and/or displayed on the supply's front panel. The power supply has no potentiometers. Each output is individually calibrated over the HP-IB usin...

General Information 15 Specifications Table 1-2 lists the performance specifications for the HP 662xA power supplies. Performance specifications describe theinstrument's warranted performance. The service manual, Option 9l0, contains procedures for verifying the performancespecifications. Table 1-3 ...

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 programmable and depends upon the output voltage. The current sinking capability is described in greater detail in...

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...

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 ...

General Information 21 Figure 1-4. CV Operation with Capacitive Load, Stability Graph for all Outputs

General Information 23 Figure 1-6. CC Operation with Inductive Load, Small Signal Stability Graph for LV (0 to 20 V) Outputs

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 HP-IB cable. The power supply generates operating magnetic fields which ma...

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...

Installation 27 Figure 2-2. Rear Panel Detail (6624A Shown) Table 2-2 Line Fuses Line Voltage Fuse Needed HP Part Number(for 1/4 X 1-1/4 in. fuses only 100/120 V 8A 2110-0342 220/240 V 4A 2110-0055 Note All fuses are rated for 250 V. Figure 2-3. Line Module Detail

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 Hewlett-Packard. Below each drawing is the HP part number for thereplacement power cord equipped with a...

Installation 29 FIRE HAZARD Make sure the replacement fuse is one of the same type (size) and rating (amps) that is consistent with the voltage level you are operating at. Do not use a substitute fuse; use a fusewith the same HP Part number listed in Table 2-2. 6. Close the door of the line module a...

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,...

Getting Started 32 • The proper fuse is installed and the line cord is plugged in. 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 aseries of...

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...

Getting Started 36 Figure 3-4. Typical Display at Power-On Self-Test Errors If the supply fails the power-on self-test, all power supply outputs will remain disabled (off) and the display will indicatethe type of failure and the output channel on which it occurred. Figure 3-5 shows that self-test de...

Getting Started 38 6. Check that the display reads approximately 0 volts and the minimum current limit value (0.05 to 0.13A depending upon the model and output, see Table 5-4). Also, check that the front panel CC annunciator is on indicating that theoutput is in the constant current mode of operatio...

Getting Started 39 OUTPUT The HP BASIC language statement that addresses the power supply to talk and reads back data from the power supply is: ENTER The supply's front panel ADDR annunciator is on when the supply is addressed to talk or to listen. Reading the HP-IB Address Before you can operate yo...

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 query asks the supply to measure the output voltage at output 1. When you send a query from remote, the supply does not display the resp...

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 disabl...

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...

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...

Output Connections and Operating Information 45 Figure 4-2. Typical Output Range Characteristics

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 ...

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 connectio...

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 4-2Afor wor...

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...

Output Connections and Operating Information 50 sensing is especially useful for CV operation with load impedances that vary or have significant lead resistance. It has noeffect during CC operation. Because sensing is independent of other power supply functions, remote sensing can be usedregardless ...

Output Connections and Operating Information 51 OUTPUT TYPE FORMULA (40 W & 80 W) LV Output CV Reg Error(mV) = Rs ( Vset 45 Vdrop 1.1 - ) HV Output CV Reg Error(mV) = Rs ( Vset 105 Vdrop 3.3 - ) CV Regulation Error = Remotely sensed voltage will change by this number of millivolts. Rs = Resistan...

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+OV and -OV. By connecting the OV terminals all in parallel as shown in Figure 4-7, an overvoltage shutdo...

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 andnoise bypass capacitors. Do not exceed 50 volts maximum between the + OV and the - OV terminals. ...

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...

Output Connections and Operating Information 55 - V terminals of output 1 keeps the total length of the load leads to a minimum and reduces the number of wireconnections that must be made at the load itself. Connecting the + S and - S terminals of output 2 directly to the senseterminals of output 1 ...

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...

Output Connections and Operating Information 57 Series Operation SHOCK HAZARD Floating voltages must not exceed 240 Vdc. No output terminal may be more than 240 Vdc from chassis ground. Connect in series only outputs that have equivalent current ratings. Each output has a reverse voltageprotection d...

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 ...

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 HP-IB controller. This chapter contains all the information required to control your power supplyremotely and discusses ...

Remote Operation 62 providing the controller is configured to service interrupts. A service request can be generated whenever there is a fault onone of the outputs (up to 4 outputs), a programming error has occurred, or at power on providing certain commands aresent. Service request commands are dis...

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...

Remote Operation 68 Order of Execution When you send a set of instructions to the power supply, they are executed in the order in which they are received. Thepower supply completes the execution of the present command before executing another command. To send more thanone command within the power su...

Remote Operation 69 Voltage Programming To program voltage, send the output channel and the programmed value. In the example below, output 1 is programmedto 5 V. VSET 1,5 The values you send must always be volts. For example if you want to program 450 millivolts, convert to volts and thensend the co...

Remote Operation 71 Example 2: VSET 1,20 Now output 1 is in the high range programmed to 20 V and 2A. Example 3: VSET 1,5; ISET 1,3 Output 1 is now in the low range programmed to 5 V and 3A. Example 4: VSET 1,10 Now output 1 is in the high range and the current is automatically scaled back from 3 A ...

Remote Operation 72 To enable an output after it went into overvoltage, you must first remove the overvoltage condition and then send the OVreset command. To reset output 1 send: OVRST 1 If you send the reset command without first removing the OV condition, the supply will fire the OV again. NOTE If...

Remote Operation 73 At power-on, each of the registers contain 0 volts and the minimum current limit. To store voltage and current settings,you must specify the register (1 to 10). For example to store the present settings of current and voltage of all your supply'soutputs in register 2, send the fo...

Remote Operation 75 The Mask and Fault Register. The fault register works in conjunction with the mask register. These are two eight bit registers which report any fault condition on a particular output channel. The mask register is used to set up theconditions that generate a fault which is latched...

Remote Operation 76 The first four bits (0 to 3) in the register tell whether or not a particular output has a fault. If there is a fault in one of theoutputs, then the corresponding FAU bit will be set. Thus if output 1 has a fault, then FAU 1 will be set. In models withonly three outputs, FAU 4 wi...

Remote Operation 77 Service Request Enable/Disable . You can query the status of the service request enable/disable function by sending the query: SRQ? and addressing the power supply to talk. The response from the supply is one of the following: 0, 1, 2, or 3 0--indicates that the service request c...

Remote Operation 79 DSP 1 You can also find out the status of the display by sending the following query and addressing the supply to talk: DSP? The response will be either a "1'' or a "0''. Message Display Capability . The display command can also be used to display messages on the front pa...

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 performthe checkout procedures that were given in that chapter. The following paragraphs describe how to use all of the frontpanel control...

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....

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...

Local Operation 87 ADDR 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 canpress another function key. If you want to change the address, you...

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 ...

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 ...

Calibration Procedures 92 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 > - This command turns the calibration mode either on or off. The parameter must be either...

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...

Programming with a Series 200/300 Computer97 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 HP extended BASIC language. Examples are included that emplo...

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...

Programming with a Series 200/300 Computer99 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 ...

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 anerror is detected, no attempt is made to execute the command. Instead, a bit in the serial poll register is set. If SRQ2 orSRQ3 ...

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...

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...

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...

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 HP 6621A-24A, and 6627A power supplies. All of the commands can be executed remotely over the HP-IB. Many of the commandscan also be executed ...

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, ...

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 ...

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 ...

Error Codes and Messages 109 D Error Codes and Messages Introduction This appendix describes the HP-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...

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...

Manual Backdating 113 E Manual Backdating Introduction The backdating information in this section applies to units that have the following serial numbers: HP Model 6621A serials 2611A-00101 to 01680HP Model 6622A serials 2611A-00101 to 02090HP Model 6623A serials 2611A-00101 to 02230HP Model 6624A s...

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,...

HP Sales and Support Office 115 HP Sales and Support Office For more information, call your local HP Sales Office listed in the telephone directory white pages. Ask for the ElectronicInstruments Department. Or contact: United States: Hewlett-Packard Company4 Choke Cherry RoadRockville, MD 20850(301)...