Agilent Technologies 668xA manual

OPERA TING GUIDE GPIB DC POWER SUPPLIES A gilent T echnologie s Models 664xA , 665xA , 667xA , 668xA , and 669xA sA A g ilent Part No. 5964- 8267 Printed in M alaysia M icr o f ic h e Part N o . 5964 - 8268 January , 200 5[...]

2 Certification Agilent Technologies certifies that this pr oduct met its published specifications at time of s hipment from the factory. Agilent Technologies further cer tifies that its calibration measur ements are traceable to the United States National Institute of Standards and Technology, to the extent allow ed by the Institute's calibra[...]

3 Safety Summary The following general safety precautions mus t be observ ed during all phases of operation, servic e, and repair of this instr ument. Failure to comply with these prec autions or with spec ific warnings elsewhere in this manual violates s afety standards of des ign, manufacture, and intended use of the ins trument. Agilent Tec hnol[...]

4 Safety Symbol Definitions Symbol Description Symbol Description Direct current Terminal for Line conductor on permanently installed equipment Alternating current Caution, risk of electric shock Both direct and alternating current Caution, hot surface Three - phase alternating current Caution (refer to accompanying documents) Earth (ground) termin[...]

5 DECLA RA TION OF CONFORM I TY Acc ording to IS O/IE C Guide 22 and CEN/CE NELEC EN 45014 Manufacturer’s Name and Address Respon sible Party Alterna te Ma nufactur ing Site Agilen t Technologies, In c. Agilen t Technologies (Malay sia) Sdn. Bhd 550 Clark D rive, S uite 101 Budd La ke, New Jersey 07828 USA Mala ysia Manufa ctur ing Bayan Lepas Fr[...]

6 DECLA RA TION OF CONFORM I TY Acc ording to IS O/IE C Guide 22 and CEN/CE NELEC EN 45014 Manufacturer’s Name and Address Respon sible Party Alterna te Ma nufactur ing Site Agilen t Technologies, In c. Agilen t Technologies (Malay sia) Sdn. Bhd 550 Clark D rive, S uite 101 Budd La ke, New Jersey 07828 USA Mala ysia Manufa ctur ing Bayan Lepas Fr[...]

7 DECLA RA TION OF CONFORM I TY Acc ording to IS O/IE C Guide 22 and CEN/CE NELEC EN 45014 Manufacturer’s Name and Address Respon sible Party Alterna te Ma nufactur ing Site Agilen t Technologies, In c. Agilen t Technologies (Malay sia) Sdn. Bhd 550 Clark D rive, S uite 101 Budd La ke, New Jersey 07828 USA Mala ysia Manufa ctur ing Bayan Lepas Fr[...]

8 Table of Contents Certification 2 Safety Sum mary 3 Printing Hi story 4 Declarations 5 Table of Cont ents 8 GENE RA L INF ORMA TION 11 Introdu ction 11 Safety Considerations 12 Instrument Identifi catio n 12 Options 12 Accessories 13 Description 13 Front P anel Pr ogramming 14 Re mo te P r o g ra mmi ng 14 An alog Prog ramm ing 14 Output Characte[...]

9 Check sum Errors. 58 Runtim e Error Messages 58 USER CONNECTIONS 59 Rear Panel Connections (All M odels) 59 Load Wire Selection (All M odels) 59 Analog Conn ector (All Models) 60 Digital Connector (All M odels) 60 Connecting Series 664xA and 665xA Power Supplies to the Load 61 Output Isolation 61 Load Cons iderations 61 Loca l Vol tage Se nsing 6[...]

10 Introdu ction 95 Equipment Required 95 General Procedure 95 Parameters Calibrated 95 Tes t Set up 96 Front Panel Calibration 96 Entering th e Calibration Values 96 Saving the Ca libr atio n Constant s 96 Disabling the Calibration Mode 96 Changing the Calibration Password 96 Recoveri ng F rom Calibrat ion Problem s 99 Calibration Error Mess ages [...]

General Inform ation 11 1 General Information Introduction Two guides are shipped w ith you r power supply - an Operating Gu ide (this documen t) and a Programm ing Guide. You w ill find inform atio n on the follow ing tasks in these guides: Quick Document Orientatio n 1 Topic Location Calibrating the power su pply Appendix A - th is guide Compatib[...]

General Information 12 Safet y Considerations This power supply is a Safety Class 1 instrument, which means it has a protective earth terminal. That terminal must be connected to earth ground through a power sour ce equipped with a 3 - wire ground receptacle. Refer to the Safety Summary page at the beginning of this guide for general safety informa[...]

General Inform ation 13 List of Options (continued) Option Description Used w ith Agilent Series 664xA 665xA 667xA 668xA 669xA 908 Rack m ount ki t (Ag ilent 5062-3974) x Rack m ount ki t (Ag ilent 5062-3977) Support rails (E3663AC) are required. x x Rack m ount k it (A gile nt 5062- 3977 & 5062- 3974) Support rails (E3663AC) are required. x x [...]

General Inform ation 14 Operational features in clude: ■ Constant volta ge (CV ) or const ant cur rent (CC) o utput o ver the ra ted o utput range . ■ Built-in overv oltage (OV), overcurren t (OC), and overtem perature (OT) protectio n. ■ Autom a tic turn-on self test. ■ Pushbu tton nonv o latile storage an d recall of up to 5 operating sta[...]

General Inform ation 15 Output Characteristic General The power s upply can operate in eith er CV (cons tant voltag e) or CC (cons tant curren t) over its voltage and curren t ratings (see Table 1-l). The operating locus is show n by th e Output C haracteristic C urve in Table 1-2. The operating point is determined by the voltage setting (V s ), th[...]

General Inform ation 16 Table 1- 1a. Performance Sp ecification s for Series 664xA 1 Parameter A gilent M odel Number 6641A 6642A 6643A 6644A 6645A Output Rat ings Voltage: 0 - 8 V 0 - 20 V 0 - 35 V 0 - 60 V 0 - 120 V Current:@ 40 ° ° ° ° C 0 - 20 A 0 - 10 A 0 - 6 A 0 - 3.5 A 0 - 1.5 A Current:@ 50 ° ° ° ° C 0 - 18 A 0 - 9 A 0 - 5.4 A 0 - 3[...]

General Inform ation 17 Table 1-1b. Supplemental Characteristics for Series 664xA 1 Parameter A gilent M odel Number 6641A 6642A 6643A 6644A 6645A Output Prog ramm ing Ra nge (max im um programm able values) Voltage: 8.190 V 20.475 V 35.831 V 61.425 V 122.85 V Current: 20.475 A 10.237 A 6.142 A 3.583 A 1.535 A Overvoltage Protection (OVP): 8.8 V 22[...]

General Inform ation 18 Table 1-lb. Supplemental Characteristics for Series 664xA (continued) 1 Parameter A gilent Model Number 6641A 6642A 6643A 6644A 6645A Maximum AC Line Current Ratings 100 Vac nom inal: 120 Vac nom inal: 220 Vac nom inal: 230 Vac nom inal: 240 Vac nom inal: 4.4 A rm s 3.8 A rm s 2.2 A rm s 2.1 A rm s 2.0 A rm s Maximum Reverse[...]

General Inform ation 19 Table 1-1b. Supplemental Characteristics for Series 664xA (continued) 1 Parameter A ll Models Digital Port Ch aracteristics ( s ee T a b l e 1 - 6 ) GPIB Interface Capabilities ( s ee T a b l e 1 - 6 ) Serial Link Capabilities ( s ee T a b l e 1 - 6 ) Recom m ended Calibration Interval: 1 year Safety Com pliance Com plies wi[...]

General Inform ation 20 Table 1-1b. Supplemental Characteristics for Series 664xA (continued) 1 Parameter A ll Models Output Impedance Curves (Typical): Notes: l For Performance Specif ications, see Table l-la.[...]

General Inform ation 21 Table 1- 2a. Performance Sp ecification s for Series 665xA 1 Parameter A gilent M odel Number 6651A 6652A 6653A 6654A 6655A Output Rat ings Voltage: 0 - 8 V 0 - 20 V 0- 35 V 0 - 60 V 0 - 120 V Current:@ 40 ° ° ° ° C 0 - 50 A 0 - 25 A 0 - 15 A 0 - 9 A 0 - 4 A Current:@ 50 ° ° ° ° C 0 - 45 A 0 - 22.5 A 0 - 13.5 A 0 - 8[...]

General Inform ation 22 Table 1-2b. Supplemental Characteristics for Series 665xA 1 Parameter Agilent Model Number 6651A 6652A 6653A 6654A 6655A Output Prog ramm ing Ra nge (max im um programm able values) Voltage: 8.190 V 20.475 V 35.831 V 61.425 V 122.85 V Current: 51.188 A 25.594 A 15.356 A 9.214 A 4.095 A Overvoltage Protection (OVP): 8.8 V 22.[...]

General Inform ation 23 Table 1-2b. Supplemental Characteristics for Series 665xA (continued) 1 Parameter A gilent Model Number 6651A 6652A 6653A 6654A 6655A Maximum AC Line Current Ratings 100 Vac nom inal: 120 Vac nom inal: 220 Vac nom inal: 230 Vac nom inal: 240 Vac nom inal: 12 A rm s (15 AM fu se) 10 A rm s (12 AM fu se) 5.7 A rm s (7 AM fu se[...]

General Inform ation 24 Table 1-2b. Supplemental Characteristics for Series 665xA (continued) 1 Parameter A ll Models Digital Port Ch aracteristics ( s ee T a b l e 1 - 6 ) GPIB Interface Capabilities ( s ee T a b l e 1 - 6 ) Serial Link Capabilities ( s ee T a b l e 1 - 6 ) Recom m ended Calibration Interval: 1 year Safety Com pliance Com plies wi[...]

General Inform ation 25 Table 1-2b. Supplemental Characteristics for Series 665xA (continued) 1 Parameter A ll Models Output Impedance Curves (Typical): Notes: l For Performance Specif ications, s ee Table l-2a.[...]

General Inform ation 26 Table 1- 3a. Performance Sp ecifications f or Series 667xA 1 Parameter A g ilent M odel Number 6671A 6672A 6673A 6674A 6675A Output Rat ings Voltage: 0 - 8 V 0 - 20 V 0- 35 V 0 - 60 V 0 - 120 V Current:@ 0 to 55 ° ° ° ° C 0 - 220 A 0 - 100 A 0 - 60 A 0 - 35 A 0 - 18 A Program m ing Accuracy (@ calibration temperature* ±[...]

General Inform ation 27 Table 1-3b. Supplemental Characteristics for Series 667xA 1 Parameter Agilent Model Number 6671A 6672A 6673A 6674A 6675A Output Prog ramm ing Ra nge (max im um programm able values) Voltage: 8.190 V 20.475 V 35.831 V 61.425 V 122.85 V Current: 225.23 A 102.37 A 61.43 A 35.83 A 18.43 A Overvoltage Protection (OVP): 10.0 V 24.[...]

General Inform ation 28 Table 1-3b. Supplemental Characteristics for Series 667xA (continued) 1 Parameter A gilent Model Number 6671A 6672A 6673A 6674A 6675A Rem ote Sensing Capability Voltage Drop Per Le ad: Load Voltage: Up to 1/2 of rat ed outpu t voltage. Subtract voltage drop in load leads from specif ied output volta ge ra ting. Load Regu lat[...]

General Inform ation 29 Table 1-3b. Supplemental Characteristics for Series 667xA (continued) 1 Parameter A ll Models Digital Port Ch aracteristics ( s ee T a b l e 1 - 6 ) GPIB Interface Capabilities ( s ee T a b l e 1 - 6 ) Serial Link Capabilities ( s ee T a b l e 1 - 6 ) Recom m ended Calibration Interval: 1 year Safety Com pliance Com plies wi[...]

General Inform ation 30 Table 1-3b. Supplemental Characteristics for Series 667xA (continued) 1 Parameter A ll Models Output Impedance Curves (Typical): Notes: l For Performance Specif ications, s ee Table l-3a.[...]

General Inform ation 31 Table 1- 4a. Performance Sp ecifications f or Series 668xA 1 Parameter A g ilent M odel Number 6680A 6681A 6682A 6683A 6684A Output Rat ings Voltage: 0 - 5 V 0 - 8 V 0- 21 V 0 - 32 V 0 - 40 V Current:* 0 - 875 A 0 - 580 A 0 - 240 A 0 - 160 A 0 - 128 A *Derated lin early 1%/ ° C from 40 ° C to 55 ° C Program m ing Accuracy[...]

General Inform ation 32 Table 1-4b. Supplemental Characteristics for Series 668xA 1 Parameter A gilent M odel Number 6680A 6681A 6682A 6683A 6684A Ripple & Noise (fro m 20 Hz to 2 0 MH z with outp uts ungro unded , o r with eithe r out put te rminal gr ounde d) Constant Current:** rms ** With load inductance > 5 µ H. 290 mA 190 mA 40 mA 28 [...]

General Inform ation 33 Table 1-4b. Supplemental Characteristics for Series 668xA (continued) 1 Parameter A gilent Model Number 6680A 6681A 6682A 6683A 6684A Rem ote Sensing Capability Voltage Drop Per Le ad: Load Voltage: Up to 1/2 of rat ed outpu t voltage. Subtract voltage drop in load leads from specif ied output volta ge ra ting. Load Regu lat[...]

General Inform ation 34 Table 1-4b. Supplemental Characteristics for Series 668xA (continued) 1 Parameter A ll Models Comm and Pr ocessing Time (A verage tim e for output voltage to ch ange af ter receipt of digital data w hen the su pply is connected directly to the GPIB B us): 20 m s Monotonicity: Output is m o notonic over entire rated voltage, [...]

General Inform ation 35 Table 1-4b. Supplemental Characteristics for Series 668xA (continued) 1 Parameter A ll Models Output Impedance Curves (Typical): OUTPUT I MPEDANCE ( MILLIOHMS) 100 1K 10K 20 10 5 2.5 1.25 0.625 0.312 0.156 0.078 0.039 0.01 95 50K 30 Agilent 6680A FREQUENC Y (HZ) * ** CV MOD E CC MOD E 1K 10K 20 10 5 2.5 1.25 0.625 0.312 0.15[...]

General Inform ation 36 Table 1- 5a. Performance Sp ecifications f or Series 669xA 1 Parameter A g ilent M odel Number 6690A 6691A 6692A Output Rat ings Voltage: 0 - 15 V 0 - 30 V 0- 60 V Current:* 0 - 440 A 0 - 220 A 0 – 110 A *Derated lin early 1%/ ° C from 40 ° C to 55 ° C Program m ing Accuracy (@ 25 ± 5 °C ) Voltage: 0.04% + 15 m V 30 m[...]

General Inform ation 37 Table 1-5b. Supplemental Characteristics for Series 669xA 1 Parameter A gilent M odel Number 6690A 6691A 6692A Ripple & Noise (fro m 20 Hz to 2 0 MH z with outp uts ungro unded , o r with eithe r out put te rminal gr ounde d) Constant Current:** rms ** With load inductance > 5 µ H. 200 mA 50 mA 30 mA Output Prog ramm[...]

General Inform ation 38 Table 1-5b. Supplemental Characteristics for Series 669xA (continued) 1 Parameter A gilent Model Number 6690A 6691A 6692A Rem ote Sensing Capability Voltage Drop Per Le ad: Load Voltage: Up to 1/2 of rat ed outpu t voltage. Subtract voltage drop in load leads from specif ied output volta ge ra ting. Load Regu lation: Degrada[...]

General Inform ation 39 Table 1-5b. Supplemental Characteristics for Series 669xA (continued) 1 Parameter A ll Models Comm and Pr ocessing Time (A verage tim e for output voltage to ch ange af ter receipt of digital data w hen the su pply is connected directly to the GPIB B us): 20 m s Monotonicity: Output is m o notonic over entire rated voltage, [...]

General Information 40 Table 1-5b. Supplemental Characteristics for Series 669xA (continued) 1 Parameter All Models Output Impedance Curves (Typical): Agilent 6690A 0.01 0.1 1 10 100 1000 10 100 1000 10000 100000 Frequency (in Hz) Magnitude (in milliohms) CC mode CV mode * ** Agilent 6691A Frequency (in Hz) Magnitude (in milliohms) CC mode CV mode [...]

General Inform ation 41 Table 1-6. Supplemental GPIB Char acteristics for A ll M odels - Parameter A ll M odels Digital Port Ch aracteristics Maximu m ratings: 16.5Vdc betw een termi nals 1& 2; 3&4; and from 1 or 2 to chassis ground FLT/I NH Operation FLT/IN H Term inals 1 & 2: I ol (low -level ou tput current) V ol (lo w-level out put [...]

General Inform ation 42 Table 1- 7. Operato r Replaceable Parts List (cont inued) Description (Unless otherwise specified, parts apply to all m odels.) A gilent Part No. Fuse s, Series 664xA M6A 250V (f or 100 Vac lin e voltag e, referen ce design ator F450) M5A 250V (f or 120 Vac lin e voltag e, referen ce design ator F450) M3A 250V (f or 220/230/[...]

Ins tallation 43 2 Installation Inspection Damage When y o u receive y our power su pply, in spect it for any obviou s damage that m ay hav e occurred durin g sh ipmen t. If there is damag e, notify the sh ipping carrier and th e nearest A gilent Sal es and Su pport Office im mediately . Warranty in formation i s printed in the front of this gu id [...]

Installat ion 44 Table 2-1. Items Supplie d (continued) Output hardware Series 667x A only Output h ardw are (screws w ith nuts an d lockwash ers) for secu ring y our load wires to the outpu t bus bars (see Table 1-6). Guide change page If applicable, chan ge sheets may be included with this g uide. If th ere are change s heets, m ake the indicated[...]

Ins tallation 45 Input Pow er Source Refer to the applicable paragraphs below for in formation on the input pow er so urce. Do not apply pow er to the power supply until directed to do so in Chapter 3. Check th e line RATING label on th e rear of your su pply and verif y th at the voltage show n there corresponds to the nominal lin e voltage of y o[...]

Installat ion 46 The power cord s upplied w ith power su pply may or may not inclu de a power plu g (see "Options" in Chapter l) at one en d of the cord. Termin ating conn ections and a ground lu g are attached to th e other end of the cord. See Figure 2- 2 and proceed as follow s: 1. If they are not already in place, position the strain [...]

Ins tallation 47 Installing the Series 668xA Power Cord The Series 668x A pow er supply requires a 3-phas e power source t hat provi des 7350 VA (6000 W) ma xim um. The su pply has a delta input (no neu tral connection) and w ill accept p ower f rom either delta (triang le) or wy e (star) sources. T wo voltage rang es are available (see "A C I[...]

Installation 48 Figure 2 - 5. Connecting the Series 668xA Power Cord Installing the Series 669xA Power Cord The Series 66 9xA power supply requires a 3 - phase power source that provides 9000 VA (7950 W) maximum. The supply has a delta input (no neutral connection) and will accept power from either delta (triangle) or wye (star) sources. Two voltag[...]

Installation 49 3. Tighten the screws securing the clamp . 4. Insert the line cord with the cable clamp into one of the two openings on the safety cover. (The figure shows the line cord installed in the bottom opening.) Tighten the cable clamp to the safety cover. 5. Remove the insulation from the pre - striped end of the three ac lines. Secure the[...]

[...]

Turn-On Check out 51 3 Turn-On Checkout Note This chapter pro vides a preliminary introduction to the power supply f ront panel. See "Chapter 5 - Front Panel" for more details. Introduction Successf ul tests in this chapter provide a hi gh deg ree of conf idence that th e pow er supply is operating properly. For verification tests, see ?[...]

Turn-On Checkout 52 Pow er-On Ch eckout (A ll Models) 1. Connect th e power cord to the pow er source (for Series 668x A & 669xA , turn on the saf ety disconnect sw itch). 2. Turn the front panel power sw itch to ON (1). 3. The power s upply undergoes a self- test w hen you tu rn it on. If the test is norm al, the follow ing sequen ce appears o[...]

Turn-On Check out 53 Checking the Voltage Function The tests in Table 3-1 check the basic voltage fu nctions w ith no load connected to th e power supply . T he VOLTS displa y will sh o w v arious readings. Ign ore the AMPS display . Table 3-1. Checking the Voltage Functions (Output Terminals Open) Procedure Display Explanat ion Outpu t Termin als [...]

Turn-On Checkout 54 Checking the Current Function ENERGY HAZARD . Som e supplies (Series 668x A/669xA) can provide more th an 240 VA at m ore than 2 V. If th e output connections touch , severe arcing m ay occur resulting in burns, ig nition or welding of parts. Do not attempt to mak e connections w hile the output is live. The tests in Table 3-2 c[...]

Turn-On Check out 55 Table 3-2. Checking the Current Functions (Output T erminals Shorted) (continued) A ction Display Explanation Pre ss AMPS 0.000 Dis annunciat or t urns on. Pre ss You hav e disabled the overcu rrent protection circuit. The OCP annuncia tor turns o ff. Pre ss ( )** You hav e cleared the overcurren t protection circuit. The Prot [...]

Turn-On Checkout 56 Series 669xA supplies, if the Red indicator appears in the f use win dow on the rear pan el, then on e or more of the line fuses are open. If th e supply has a defective fu se, replace it only once. If it fails again , investig ate the reason for the fai lure. Proceed as follow s: Series 664xA and 665xA Supplies The line fus e i[...]

Turn-On Check out 57 Series 668xA Supplies The line fus es are located on the rear pan el (see Figure 2-5). Proceed as follow s: l. Turn of f th e front pan el power sw itch and rem ove the in put pow er (unplug the power cord or open the sa fety disconnect). 2. Rem ove the ac inpu t safety cover f rom the rear panel. 3. Unscr ew the fuse cap s and[...]

Turn-On Checkout 58 Tabl e 3-3. Pow er-On Selftest Erro rs Error No. Display Failed Test Erro r No. Display Failed Test El FP RAM Front Panel RAM E8 SEC RAM Secondary RAM E2 FP ROM Front Panel ROM checksu m E9 SEC ROM Secondary R OM checksum E3 EE CHKSUM EEPROM E10 SEC 5V Secondary 5 V ADC reading E4 PRI XRAM P rimary external RAM Ell TEM P Seconda[...]

User Connections 59 4 User Connectio ns Rear Panel Connections (All Model s) Make application load con nections to th e output termin als or bus bars , analog con nector, and dig ital connector as show n on the rear-panel draw ing for y our model pow er supply. These con nections are org anized by series as follow s:  Series 664x A and 665xA [...]

User Connections 60 A nalog Connector (A l l M odels) This connector, w hich is on th e rear panel, is for con necting remote sen se leads, external current m onitors, and external program ming s ources. The conn ector accepts w ires sizes from AWG 22 to AWG 12.  Insert Wires Agilent S eries 664xA & 665xA IP Current prog rammi ng in put. VP [...]

User Connections 61 Connecting Seri es 664xA and 665xA Power Suppl ies to the Load  Output Safety Co ver  + Outpu t Terminal  - Output Term inal  Signal Co mm on  O utput Sense Switch  Analog Connector Figure 4-3a. Series 664xA and 665xA Rear P anel Output Connections Output Isolation The output of the pow er supply is is olated f[...]

User Connections 62 Series 664xA/665xA Power Supplies, Maxim um OVP External Capacitance ( µ µ µ µ F) 6641A 6642A 6643A 6644A 6645A 6651A 6652A 6653A 6654A 6655A 700,000 35,000 15,000 7,000 3,000 1.6 (F) 100,000 50,000 18,000 8,000 If a load capacitance approach es the specifi ed limit, it is recomm ended that you do n o t mak e it a norm al pr[...]

User Connections 63 Note If the sense term inals are left unconnected, the v oltage at the bus bars w ill increase app roximately 3 to 5% over the prog ramm ed value. Since it is m easured at the sense term inals, the voltage readback w ill not reflect this in creased output. Remote Voltage Sensing The dashed lines in the w iring diagrams illustrat[...]

User Connections 64 Stability Using re mote sensi ng under unusual co mbinatio ns of lo ad -lead lengths a nd la rge lo ad c apa cita nces may cause your application to form a low-pass filter that becom es part of the voltage f eedback loop. T he extra phas e shif t created by th is filter can deg rade the supply 's stability and result in poo[...]

User Connections 65 c Load Conn ection d Lo ad s e Analog Connector A Set sw itch for local o r (optio nal) remote sensing B Connect for remote sensing (optional) Figure 4-3c. Series 664xA and 665xA Multiple Load Connection (Remote Sensing Optional) Connecting Supplies in A uto-Parallel Auto-Par a llel Wiring. Figure 4-3d illustrates how pow er sup[...]

User Connections 66 Auto-Parallel Program m ing. Pr ogram only the output current of the f irst (" master") supply in the series; th e "slave" supplies automatically track the master's output. Program the output cu rrent of the slav e supplies to zero. However, the voltage and OVP settings of the slav e supplies must be set[...]

User Connections 67 Connecting Supplies in Series Floating voltages mu st not exceed ± 240 Vdc. N o output term inal m ay be m ore than 240 V from chassis gro und. Figure 4 -3f shows how power sup plie s can b e co nnecte d in ser ies fo r highe r volt age o utput. Series connection s are straightforw ard in this case. Program each power su pply i[...]

User Connections 68  Analog connector l=Vo ltage pr ogra mming source 0 to --5 V 2=Cur re nt pr ogra mming source 0 to --5 V Figure 4-3g. Series 664xA and 665xA A nalog Programming Connections If you cannot avoid capacitive co upling, it may help to place capacito rs from the unused progra mm ing inp uts to ground . Especially w ith auto-paralle[...]

User Connections 69  Output Safety Co ver  Analog Conn ector  -Ou tput Bus Bar  -Local Sen se Terminal  + Local Sense Terminal  + Output Bus Ba r  Signal Co mm on  L ocal Sense Jum p ers  Rear Knoc kouts  Bo ttom Kno ckout A In sert screw driver blade in slot and pry out B Bend along j oint an d break off WARNING DO NO[...]

User Connections 70 Q= L 1 RC xt int e R + w here: C = m odel-dependent internal capacitan ce (see below); L = in ductance of the load; Rext = equivalen t series resistan ce of the load; R int = model- dependent internal resistan ce (see below): 6671A 6672A 6673A 6674A 6675A C= 44,000 µ F 44,000 µ F 12,000 µ F 7,000 µ F 2,100 µ F R int = 1.8 m[...]

User Connections 71 Connectin g the Sense L eads You mu st co nnect the positive side of th e load to the +S analog connector pin and the n egative side of the load to the -S analog con nector pin (see Fig ure 4-1). Connect th e sense leads carefully so that they do not becom e open-circu ited. If sen se leads are left open during operation, the su[...]

User Connections 72  Load Leads  Rem o te Sense Points Cl, C2 = 33 µ F C3 = Load by pass capacitor R1, R2 = 20 Ω , 1% Figure 4-4b . Series 667xA Sen se Lead Bypass Netw ork Connecting One Pow er Supply to a Single Load Figu r e 4-4c sh ow s how to con nect a singl e pow er supply to one load. Keep outpu t load leads close togeth er (small [...]

User Connections 73  Loa ds  Load Conn ection  Analog Connector A Connect for r emote se nsing (o pti onal) B Connect f o r local sensin g (default) Figure 4-4d . Series 667x A Multiple Load Connection (Remote Sensing Optiona l) Connecting Supplies in A uto-Parallel Auto-Parallel Wiring (Figure 4-4e). Figure 4-4e illustrates h ow pow er su[...]

User Connections 74 Auto-Parallel Program m ing. Pr ogram only th e output current of the first ("m aster") supply in the series; th e "slave" supplies automatically track the master' s output. Pro gram the output curren t of the slave su pplies to zero. However, the voltage and OVP settings of th e slave supplies m ust be [...]

User Connections 75 External Voltage Control The setup show n in Figu re 4-4g allow s an extern al dc voltage to program th e power supply o utput. A voltage applied to the voltage program mi ng inpu t programs th e o utput voltage an d a voltage applied to the current program ming in put program s the outpu t current. See Fig ure 4-1 for an explan[...]

User Connections 76 Connecting Seri es 668xA and 669xA Power Suppl ies to the Load ENERGY HAZARD . These pow er supplies can provi de more t han 240 VA at more than 2 V. If the output connections touch, severe arcing m ay occur resu lting in bu rns, ignition or welding of parts. Do not attempt to m ake connections to live output circuits.  An al[...]

User Connections 77 Inductive Loads Inductiv e loads present n o loop stability problem s in CV mode. In CC mode, indu ctive loads will f orm a parallel res onance w ith the pow er supply 's ou tput capacitor, poss ibly causin g curren t ringin g in the load. For a giv en indu ctance, the pow er supply 's CC con trol loop can be m ade to [...]

User Connections 78 OVP Consider ations The power s upply OVP circuit sens es voltage n ear the outpu t bus bars, n o t at the load. Therefore the s ignal s ensed by the OVP circ uit ca n be si gnifica ntly higher t han the a ctual volta ge at the lo ad. When usi ng remote sensing, you must pr ogr am the OVP trip volt age high e nough to co mpensat[...]

User Connections 79 Connecting One Pow er Supply to a Single Load Figu r e 4-5c sh ow s how to con nect a singl e pow er supply to one load. Keep outpu t load leads close togeth er (small loop area) to obtain a low inductance and low impedance con nection to th e load. If y o u w ish to use rem ote sensing, conn ect the sense leads at the load as s[...]

User Connections 80 Connecting Supplies in A uto-Parallel Note Refer to Appendix F f or more inf o rmation about auto-parallel operation. Auto-Parallel Wiring (Figure 4-5e). Figure 4- 5e shows how power supplies can be auto- p aralleled for increased cu rrent outp ut. Up to t hree sup pli es can b e co nnect ed fo r auto -pa rall el op er atio n. U[...]

User Connections 81 Connecting Supplies in Series Floating voltag es m ust not exceed ± 60 Vdc. No outpu t term inal may be more th an 60 V f rom ch assis ground . Figure 4-5f illu strates how power supplies can be conn ected in series for increased voltage capability . Series connections are straigh tforw ard in this case. Program each power supp[...]

User Connections 82 External Voltage Control The setup s how n in Fig ure 4-5g allows an extern al dc voltag e to program th e power suppl y ou tput. A zero-to- full scale voltag e applied to th e voltage program ming input produces a proportional zero- to-full s cale outpu t volta ge. The volt age pro gra mm ing sour ce is r efer ence d to the p r[...]

User Connections 83 Controll er Connections Figure 4- 6 show s two bas ic way s of con necting your pow er supply to a controller. They are "link ed" and "stand-alon e confi gurati ons. Stand-A lone Connections See Fig ure 4-6A . Each stand- alone pow er supply has its ow n GPIB bus address . Stand- alone power s upplies m ay be conn[...]

User Connections 84        A B From 1 to 16 direct s upplies m ay be conn ected to 1 controller GPIB interf ace. Ti ghten co nnect or t humbscrews by hand. Do no t use a scre wdriver . Do not stack m ore than 3 connectors on a GPIB receptacle. GPIB cable (see Accessories in C hapter 1) From 1 to 15 linked su pplies m ay be con [...]

Front Panel Op eration 85 5 Front Panel Oper ation Introduction This chapter shows y ou how to operate the front panel. It is assu med th at you are f amiliar w ith the turn- o n checkout procedure in C hapter 3. That chapter descri bes how to perform basic pow er supply fu nction s from the control pan el. operations that y ou can perform are: ■[...]

Front Panel Operation 86 Figure 5-1. Front P anel Controls and Indicators Table 5- 1. Front Pan el Controls an d Indicato rs (see Figure 5- 1) Control or Indicator Function or Indication     Displ ay VOLTS Show s present outpu t volt age of the pow er supply . AMPS Show s present outpu t curren t of th e power suppl y. Status Annunciato[...]

Front Panel Op eration 87 Table 5-1. Front Pane l Controls and Indicator s (continued)     Output Rota ry Controls Voltage Rotate clockw ise to increase output voltage or program setting. Use to rapidly set an approximate output value (see and keys). Current Rotate clockw ise to increase output current or prog ram setting. Us e to rapid[...]

Front Panel Operation 88 Table 5-1. Front Pane l Controls and Indicator s (continued)     ENTRY Keys (cont inued) thru Press to select nu merical v alues . Pre ss to e nter a minus sign. Press to delete the last keypad entry . Use this key to remove one or more incorrect digits bef ore they are entered. 3 These four en try k eys operate[...]

Front Panel Op eration 89 Figure 5-2. Typic al Power Supply Operating Curve Programming Voltage To program th e output f or 4.5 volts, proceed as follow s: ■ Pre ss . T he display w ill change from meter m ode to indicate VOLTS . ■ Pre ss . If y o u discov er a m istake bef ore pressing , erase the incorrect v alue with th e backspace key . ■[...]

Front Panel Operation 90 Checking OVP O peration Assum ing the above operating conditions (v oltage programm ed to 4 .5 V and OVP pro gram med to 4.8 V), trip the OVP circuit as follow s: ■ Gradually increase the output v oltage by pressing until the OVP circuit trips. This will cau se the output voltag e to drop to zero and t he Prot annunciato [...]

Front Panel Op eration 91 Programming Overcurrent Protection When en abled, overcurren t protection rem oves the pow er supply outpu t when ever it goes in to CC operation . This prevents the supply from in definitely supp lyin g the f ull programm ed current to the load. Setting The OCP Pr otection To activate overcurrent protection , press . T he[...]

Front Panel Operation 92 Unregulated Operation If the pow er supply goes into a m ode of operation that is neither CV n o r CC, the Unr a nnunciator will light. An unregulated condition limits th e output current to a value that is safe f o r the power su pply. Som e unregu lated states occur so briefly that they do not turn on the Unr annuncia tor[...]

Front Panel Op eration 93 Whenev er you w ish, y ou can return th e pow er supply to the original factory reset state. To do this, sim ply h old dow n the key w hen y ou turn on th e supply . T he display in dicates RST POWER-ON to verify that the pow er supply has con figu red its turn-on state to the original reset state. From now on it w ill con[...]

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Calibrati on 95 A Calibration Introduction The power s upply m ay be calibrated either from the front panel or f r om a con troller over the GPIB. The procedures giv en here apply to all m od els. Important These instru ctions do n ot include verif ication procedures. If y o u need to perf orm v erification as a erequisite to or as part of y our ca[...]

Calibration 96 • Ov ervoltage protection (OVP). • Output cur rent . • Ou tput curren t readback. • C urrent m onitor input I M (Series 668x A/669xA only ). You do not ha ve to do a com p lete calibration each tim e. If appropriate, you m ay calibrate only the voltage or curren t and proceed to "Saving th e Calibration Constan ts".[...]

Calibrati on 97 Figure A -1. Calibration Test Setup c) Series 668xA /669xA Setup[...]

Calibration 98 Table A - 2. Typical Fr ont Panel Calibra tion Procedure A ction Display Response Enabling the Calibratio n Mode 1. B egin c alib rat ion b y pressing . 2. Enter calibrat ion pass w ord from Entry k ey pad. If passw ord is correct the Cal annunciator will come on. If passw ord is incorrect, an error occu rs 2 . Note: The initial (fac[...]

Calibrati on 99 Table A -2. T ypical Fr ont Panel Calibr ation Proce dure (continued) A ction Display Response Calibrating Current Monitor (I M ) (Series 668xA /669xA On ly ) If you perform this calibration, then you must recalibrate the current output. 1. Ma ke ce rtai n the ap pro pri ate shunt resist or ( see T ab le A-1) i s the onl y load o n [...]

Calibration 100 Calibratio n Ov er the GPIB You can calibrate th e pow er supply by usin g SCPI com mands w ithin you r controller program ming statements. Be s ure y o u are fam iliar w ith calibration from the front panel before you calibrate f rom a controller. The SCPI calibration comm ands are related to the front panel calibration controls as[...]

Calibrati on 101 CA L:CURR: MON (Series 668xA /669xA only ) This comm and sets the power supply to the current m onitor (I MON ) calibration point that is then en tered with CAL:CURR[:DATA]. The output curr ent must be calibrated af ter CAL:CURR:MON is perf ormed. Comm and Syntax CALibrate:CURRent:MONito r Param eters <NRf+> Exam ples CAL: CU[...]

Calibration 102 CA L: VOLT This comm and is used to calibrate the output voltage. The comm and enters voltage value th at you obtain from an external meter. (If you are entering th e voltage value, allow tim e for the DVM to stabilize.) You must f irst select a calib ration level (CAL:VOLT: LEV) for the value bein g entered. Two succes sive v alues[...]

Calibrati on 103 10 ! Ag ilent BASIC Calibration Program 20 ! 30 DIM Resp$ [255],Err_m sg$[255] 40 ! 50 Volt_cal: ! Voltage DAC calibration 60 Err_foun d=0 70 PRINT TABXY(5, 10)," CONNECT I NSTRUMENT S AS SHOWN IN FIG. A-1(1). Then Press Co ntinue" 80 PAUS E 90 CLEAR SCREE N 100 ! 110 ! Assi gn pow er supply GPIB address 120 ! 130 ASSIGN [...]

Calibration 104 540 Password i s option al - on ly required if set to non- zero value 550 Default pas sw ord is four- digit m odel nu m ber 560 ! 570 ! LINE 590 PA SSWOR D MUST BE EDITED FOR MOD EL OTHER T HAN 6680 580 ! 590 OUTPUT @Ps;"CA L:S TATE ON, 6680" 600 OUTPUT @Ps;"VOL T :LEV 2" 610 ! Refer to Table A -1 f or correct s [...]

Operation Verification 105 B Operation Verification Introduction This appendix provides op eration verification test procedures. The tests do not check all the operating param eters, b ut verify that the pow er supply is perf ormi ng properly . T he required test equipm ent and acceptable test results are specified in tables at the end of this appe[...]

Operation Verification 106 Figure B-1. Verif ication T est Setup c) Series 668xA /669xA Setup[...]

Operation Verification 107 Performing the Tests General Measurement Techniques Figure B- 1 show s the setup f or the tests. Be certain to use load leads of suf ficient w ire gaug e to carry the outpu t current (s e e Table 4-1). To avoid noise pickup, u se coaxial cable or sh ielded pairs for the test leads. Programming the Pow er Supply Table 1-lb[...]

Operation Verification 108 Current Programming and Readback A ccuracy This test verif ies that th e current prog rammin g and readback are w ithin specification. Con nect the appropriate cu rrent mon itoring res istor (see Table B-1) as show n in Figure B- 1(2). T he accuracy of the res istor m ust be as specified in the table. Table B- 3. Current [...]

Operation Verification 109 Table B- 4. Operatio n Verificatio n Test Parameters for Series 664xA Test Descrip tion M inimum Spec Results * M aximum Spec Measu rement Uncertainty MODEL Agil ent 6641A Voltage Program ming and Readback Low Vo ltage (0 V) V out -5 m V ____________ mV + 5 mV 2.0 µ V Front Pan el Display Readback Vout - 6 .0 m V _______[...]

Operation Verification 110 Table B- 4. Operatio n Verificatio n Test Parameters for Series 664xA (continued ) Test Descrip tion M inimum Spec Results * M aximum Spec Measu rement Uncertainty MODEL Agil ent 6645A Voltage Program ming and Readback Low Vo ltage (0 V) V out - 51 m V ____________ mV + 51 mV 2.0 µ V Front Pan el Display Readback Vout -8[...]

Operation Verification 111 Table B- 5. Operatio n Verificatio n Test Parameters for Series 665xA Test Descrip tion M inimum Spec Results * M aximum Spec Measu rement Uncertainty MODEL Agil ent 6651A Voltage Program ming and Readback Low Vo ltage (0 V) V out -5 m V ____________ mV + 5 mV 2.0 µ V Front Pan el Display Readback Vout - 6 .0 m V _______[...]

Operation Verification 112 Table B- 5. Operatio n Verificatio n Test Parameters for Series 665xA (continued ) Test Descrip tion M inimum Spec Results * M aximum Spec Measu rement Uncertainty MODEL Agil ent 6655A Voltage Program ming and Readback Low Vo ltage (0 V) V out - 51 m V ____________ mV + 51 mV 2.0 µ V Front Pan el Display Readback Vout -8[...]

Operation Verification 113 Table B- 6. Operatio n Verificatio n Test Parameters for Series 667xA Test Descrip tion M inimum Spec Results * M aximum Spec Measu rement Uncertainty MODEL Agil ent 6671A Voltage Program ming and Readback Low Vo ltage (0 V) V out -8 m V ____________ mV + 8 mV 1.6 µ V Front Pan el Display Readback Vout -12 m V __________[...]

Operation Verification 114 Table B- 6. Operatio n Verificatio n Test Parameters for Series 667xA (continued ) Test Descrip tion M inimum Spec Results * M aximum Spec Measu rement Uncertainty MODEL Agil ent 6675A Voltage Program ming and Readback Low Vo ltage (0 V) V out - 120 m V ____________ mV + 120 mV 3.0 µ V Front Pan el Display Readback Vout [...]

Operation Verification 115 Table B- 7. Operatio n Verificatio n Test Parameters for Series 668xA Test Descrip tion M inimum Spec Results * M aximum Spec Measu rement Uncertainty MODEL Agil ent 6680A Voltage Program ming and Readback Low Vo ltage (0 V) V out - 0.005 V ____________ V + 0.005 V 1.0 µ V Front Pan el Display Readback Vout - 7 .5 m V __[...]

Operation Verification 116 Table B- 7. Operatio n Verificatio n Test Parameters for Series 668xA (continued ) Test Descrip tion M inimum Spec Results * M aximum Spec Measu rement Uncertainty MODEL Agil ent 6684A Voltage Program ming and Readback Low Vo ltage (0 V) V out - 40 m V ____________ mV + 40 mV 2.0 µ V Front Pan el Display Readback Vout -6[...]

Operation Verification 117 Table B- 8. Operatio n Verificatio n Test Parameters for Series 669xA Test Descrip tion M inimum Spec Results * M aximum Spec Measu rement Uncertainty MODEL Agil ent 6690A Voltage Program ming and Readback Low Vo ltage (0 V) V out - 0.015 V ____________ V + 0.015 V 1.0 µ V Front Pan el Display Readback Vout -22.5 m V ___[...]

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Line Voltage Conversion 11 9 C Line Voltage Conv er sion Series 664xA and 665xA Pow er Suppli es SHOCK HAZ ARD . Hazardous voltage can rem ain inside the pow er supply even af ter it has been turned of f. This procedure sh ould on ly be done by qualified electron ics service person nel. Line v o ltage conv ersion is accom plished by: ■ Series 664[...]

120 Line Voltage Conv ersion Figure C-2. Series 665xA Line Select Jumpers Series 667xA Power Suppl ies SHOCK HAZ ARD . Hazardous voltage can rem ain inside the pow er supply even af ter it has been turned of f. This procedure sh ould on ly be done by qualified electron ics service person nel. Line v oltage conversion is accomplish ed by settin g a [...]

Line Voltage Conversion 12 1 Series 668xA /669xA Pow er Supplies SHOCK HAZ ARD . Hazardous voltage can rem ain inside the pow er supply even af ter it has been turned of f. This procedure sh ould on ly be done by qualified electron ics service person nel. Line v o ltage conv ersion is accom p lished by chang ing jum per cable positions on the ac in[...]

122 Line Voltage Conv ersion Figure C-4. Remov ing t he Series 668xA /669xA Inn er Cover Figure C-5. Series 668xA/669xA Line Con version Ju mpers[...]

Digital Port Functions 123 D Digital Port Functions Digital Connector A 4- pin con nector an d a quick -discon nect mati ng pl ug are prov ided for digital in put and outpu t sig nals (s ee Figure D-l for w iring con nections , and Table 1-5 in C hapter 1 for electrical characteris tics). T his digital port can be config ured to provide either Faul[...]

124 Digital Port Functions In Figure D- 2, the INH input is connected to a sw itch that shorts pin 3 to pin 4 when ever it is necessary to externally d isable the output of th e supply. This w ill activate the remote inhi bit (RI) fault protection circuit, causin g the f ront panel Prot annuncia tor t o co me on. I t also sets the RI event b it in [...]

Digital Port Functions 125 GPIB GPIB GPIB Figure D-3. E xamples of FLT Outputs Figure D-4. Digital P ort Configuration Jumper[...]

126 Digital Port Functions Changing the Port Confi gurati on As sh ipped from the factory , the digital port is configu red for FLT/INH operation. You can change the conf iguration of the port to op erate as a general-purpose digital in put/output port to control your custom circuitry as show n in Figure D-4. To change t he po rt c onfigur ati on, [...]

Digital Port Functions 127 Relay Li nk Operation Relay link operation cannot be u sed with units th at outpu t m ore than 50 amps . (Som e 667xA series uni ts; all 668xA and 669xA series un its.) The digital port can be con figu red to provide relay control outputs f or the A gilent 59510A or 59511A Relay Access o ry. Refer to Figur e D-1 for t he [...]

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Current Loop Com pensation (Series 668xA Only) 129 E Current Loop Compensation (Series 668xA Only) Introduction This secti on describes how you m ay use cu rrent loop compen sation to optim ize for inductiv e loads or for fast C V/CC m ode crossover. A 7-position com p ensation sw itch for this purpose is located under the cover on the rear of the [...]

130 Current Loop Com pensation (Series 668xA Only) For exam ple, examin e Figure E-l f or the Model 6680A/6681A . T he chart s how s that a load com prised of about 1 millih enry indu ctance and 100 m icro ohms resistan ce (see point ) requires sw itch setting 9 (only sw itch 3 closed) to obtain 10% overshoot. If the load resistance is increased to[...]

Current Loop Com pensation (Series 668xA Only) 131 Figure E-1. CC Loop Compensation Curves For M odels 6682A and 6683A[...]

132 Current Loop Com pensation (Series 668xA Only) Figure E-1. CC Loop Compensation Curves For M odel 6684A Setting the Loop Compensation Sw itch SHOCK/ENE RGY HAZ ARD . This procedure involv es rem oving the outs ide cover and s hould on ly be done by qualified electron ics serv ice personnel. 1. Turn off the pow er switch an d disconnect the pow [...]

Using Agilent 668xA/669xA Series Power Supplies in Autoparallel 133 F Using A gilent 668xA /669xA Series Pow er Supplies in A utoparallel Introduction This inform ation is supplem entary to the inform ation in chapter 4. A m axim um of three Ag ilent 668xA /669xA series power suppl ies h avin g th e same model number, may be co nfigure d fo r autop[...]

134 Using Agilent 668xA Series Power Supplies in Autoparallel Exam ple: 1 mast er uni t, 2 slav e unit s, A gilen t Models 6680A (5V, 875A ) Iout = Im ( 3.0508 ) - 44.4A The mas ter curren t lim it mu st be set above 44.4A /3.0508 = 14.55A to obtain any ou tput current. For a no- load condition: Master cu rrent =14.55A Each slav e current = -14.55A[...]

Ouptut Bu s Bar Opti ons 135 G Output Bus Bar Options Option 601 Installation WA RNING ENERGY H AZARD . T he Series 668xA/669x A power supplies can provide m o re than 240 VA at m ore than 2 V. If the output connections touch, severe arcing m ay occur resulting in burns, ignition or welding of parts. Do no t attemp t to mak e co nnections while the[...]

136 Output Bu s Bar Option s Option 602 Installation WA RNING ENERGY H AZARD . T he Series 668xA/669x A power supplies can provide m o re than 240 VA at m ore than 2 V. If the output connections touch, severe arcing m ay occur resulting in burns, ignition or welding of parts. Do no t attemp t to mak e co nnections while the output is live. The Opti[...]

Inde x 137 Index —A— ac disc onnect s witc h, 47, 48 accessories, 1 3 air clearence, 4 4 air f low, 44, 52 analog connec tor, 43 analog port, 60 characteristi cs. See Supplem ental Characteris tics connect or conf iguration, 60 signals, 60 analog program ming . See externa l voltage control annunciator , 86 Addr, 86 Cal, 86 CC, 53, 86 CV, 52, 5[...]

138 Inde x —E— energy hazard, 5 4, 7 6, 90 , 95 , 108, 132 error messages calibra tion, 99 checksum, 58 powe r-on, 57 run-tim e, 58 selftest, 57 system . See Progra mm ing Guide externa l voltag e control, 14 664xA and 665xA, 67 667xA , 75 668xA and 669xA, 82 capac itive c oupling, 67 —F— fan, 44, 52, 55 features, 14 fire hazard, 59 FLT out[...]

Inde x 139 location, 44 —M— ma nuals, 11, 41 message CAL DENIED, 98 error. See error messag es OC, 91 OUT OF RANG E, 89, 90 PWR ON INIT, 52 RCL 0 PWR-ON, 92 RST POWER-ON, 92 me ter m ode, 52 multiple load connec tions 664xA and 665xA, 65 667xA , 72 668xA and 668xA, 79 —N— nonvolatile m emory , 92 —O— OCP key. See f ront panel k ey s ope[...]

140 Inde x Service gui de, 1 3 shock h azard, 119, 120, 121, 126, 132 slide m ount kit, 13 specif ications, 15 664xA , 16 665xA , 21 667xA , 26 668xA , 31 669xA , 36 support rails , 44 switch CC loop com pensation (668xA ), 129, 132 line sele ct for 664xA and 665xA, 119 line sele ct for 667xA , 120 local s ense (664xA /665xA), 51 local s ense , 664[...]

A gilent Sales and Support Offices For more in form ation about Agilen t Technologies tes t and measu remen t products, application s, services , and for a cu rrent sa l e s o f fi c e l i s t i ng , v i s it o ur we b sit e : h t t p : / / www. a gi l e n t . c o m/ f i nd / t md ir You can also con tact one of th e following centers an d ask for [...]

Manual Updates The following updates have been made to this manual since the original print date. 3/01/02 All references to the front panel C heck Fuses LED on series 668xA have been removed. 5/01/02 Additional information has been added about Power Cord options. The CC rms noise specification for series 668xA and 669xA is categorized as a suppleme[...]