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Theory of Operation

Detailed Circuit Description

4

4-23

Control and Switching Section

4-38.

Refer to page 2 of the Current Amplifier schematic. Relays K201 through 209, Q214
through 216, and U209 through 210 configure the Current Amplifier circuitry for the
following six modes:

•

 

Current Standby

Current Amplifier input is active through K201. Current Amplifier output is
disconnected from instrument output terminals but is routed through the sense path
through K202.

•

 

Operate1

Input is connected to BOOST IN and MCOM. Output is connected to front or rear
output terminals. FET switches Q211 and Q213 are off, enabling the error amplifier
circuitry. Operate1 is the active mode for delivering up to 11A (ac or dc) to a UUT.

•

 

Operate2

The Current Amplifier is configured as in standby mode, except K201 is off. 5700A
current source is routed to the 5725A current output terminals through K205.
Operate2 is the active mode for delivering 2.2A or less to the 5725A terminals
unless the 5725A 11A current range has been explicitly enabled from the 5700A
front panel or by remote command.

•

 

Calibrate1 (Shunt Calibration)

Input is shorted. Error amplifiers are disabled with Q211 and Q213. Output is routed
directly to current return path through K207, bypassing sense circuits. 5700A current
source is routed through K206 to the 5725A current sense path. Procedures
performed during Calibrate1 determine the value of R272. This is one of the factors
in the dc gain and the only factor in the ac gain of the Current Amplifier.

•

 

Calibrate2 (Offset Calibration)

The amplifier is configured as in Calibrate1, except with its output routed by K208
to the 5700A. Procedures performed during Calibrate2 determine the dc offset of the
Current Amplifier.

•

 

Calibrate3 (Gain Calibration)

Input is connected to BOOST IN, B-FEEDBACK, and MCOM as in Operate1, but
Output is routed through the current sense path through K202. Output is not
connected to output terminals. Procedures performed during Calibrate3 determine
the gain of the error amplifier, the other factor in the dc gain of the Current
Amplifier.

Power Supply Section

4-39.

Refer to page 3 of the Current Amplifier schematic. The unregulated, high-current
supply is made from K208 through 209, F201 through 202, CR206, and C218 through
C221.

The regulated 

±

20V supplies are composed of RT201 through 202, U205, U206, CR212

through 215, C222, C223, and associated components. Thermistors RT201 and RT202
are PTC thermistors for current limiting and transformer protection.

Содержание 5725A

Страница 1: ...5725A Amplifier Instruction Manual PN 823435 January 1989 Rev 6 6 96 1993 1996 Fluke Corporation All rights reserved Printed in U S A All product names are trademarks of their respective companies...

Страница 2: ......

Страница 3: ...ng and Inspection 2 3 2 3 Service Information 2 5 2 4 Placement and Rack Mounting 2 5 2 5 Cooling Considerations 2 5 2 6 Connecting to the 5700A Calibrator 2 6 2 7 Selecting Line Voltage 2 7 2 8 Acces...

Страница 4: ...4 15 4 21 Fan Supply Section 4 16 4 22 Digital Assembly A5 4 16 4 23 Microcomputer 4 16 4 24 External RAM 4 16 4 25 External ROM 4 16 4 26 EEROM 4 18 4 27 Data Latch 4 18 4 28 Strobe Lines 4 18 4 29...

Страница 5: ...bly A2 6 11 6 11 Accessing the High Voltage Amplifier A3 6 12 6 12 Accessing the High Voltage Sense Assembly A6 6 13 6 13 Accessing the High Voltage Output Transistors 6 14 6 14 Accessing the Intercon...

Страница 6: ...5725A Instruction Manual iv...

Страница 7: ...h Quality Reference Name Destination 4 33 4 4 Signals Monitored by the Analog Monitor Section 4 34 7 1 5725A Fault Codes 7 4 7 2 Analog Monitor Faults 7 7 8 1 Final Assembly 8 4 8 2 A1 Interconnect PC...

Страница 8: ...5725A Instruction Manual vi...

Страница 9: ...iagram 4 25 4 5 High Voltage Sense Assembly Block Diagram 4 31 6 1 Accessing the Fuse 6 4 6 2 Accessing the Air Filter 6 5 6 3 Assembly Location Diagram 6 6 6 4 Initial Access Procedure 6 8 6 5 Access...

Страница 10: ...5725A Instruction Manual viii...

Страница 11: ...the user should consult the dealer or an experienced radio television technician for additional suggestions The user may find the following booklet prepared by the Federal Communications Commission he...

Страница 12: ......

Страница 13: ...nd away from equipment to reduce the hazard of current flowing thought vital organs of the body Terms in this Manual This instrument has been designed and tested in accordance with IEC Publication 348...

Страница 14: ...shock plug the power cord into a properly wired earth grounded receptacle before connecting anything to any of the 5725A or 5700A terminals A protective ground connection by way of the grounding cond...

Страница 15: ...inside this product To avoid personal injury do not touch exposed connections and components while power is on Whenever the nature of the operation permits keep one hand away from equipment to reduce...

Страница 16: ...a board dry clothing or other nonconductor to free the victim Get Help Yell for help Call an emergency number Request medical assistance Never Accept Ordinary and General Tests for Death Symptoms of e...

Страница 17: ...on 1 3 1 2 Where to Go From Here 1 4 1 3 How to Use the Manuals 1 5 1 4 5725A Instruction Manual 1 5 1 5 5700A Operator Manual 1 5 1 6 5700A Operator Reference Guide 1 5 1 7 5700A Remote Programming R...

Страница 18: ...5725A Instruction Manual 1 2...

Страница 19: ...OUTPUT binding posts are only for current output Extended range ac and dc current is supplied through them Since most meters with a high current range use a separate high current input terminal this c...

Страница 20: ...nstallation and rack mounting Section 2 of this manual and the Y5735 Y5737 Instruction Sheet AC line power and interface cabling Section 2 of this manual Controls indicators and binding posts Section...

Страница 21: ...current Front panel local operation Remote control operation IEEE 488 or RS 232 Self calibration Fault codes these appear on the 5700A Control Display or are read from the 5700A in remote control ope...

Страница 22: ...period is ten minutes Absolute uncertainty includes stability temperature coefficient linearity line and load regulation and traceability to external standards You do not need to add anything to absol...

Страница 23: ...kHz 40 50 C pk pk RMS ppm output V ppm output V C ppm output V V 220 mV 2 2V 11V 22V 220V 1100V 3 3 3 1 3 2 5 4 5 5 40 5 200 4 1 3 1 15 2 2 4 3 5 5 10 1 5 5 1 5 2 1 1 5 1 5 3 1 5 40 3 200 1 2 1 6 3 2...

Страница 24: ...k 50k 100k 100k 300k 300k 500k 500k 1M 500 100 150 30 70 7 120 20 230 80 400 150 10 400 20 1 mV 550 100 170 30 75 7 130 20 250 80 440 150 11 400 22 1 mV 600 100 170 30 80 7 140 20 270 80 470 150 12 40...

Страница 25: ...035 16 3 30 3 30 2 30 Load Regulation ppm output V 2 2V 10 20 20 40 40 20k 20k 50k 50k 100k 100k 300k 300k 500k 500k 1M 150 20 80 15 12 4 15 5 15 5 30 10 70 20 150 50 50 10 15 5 2 1 10 2 10 4 80 15 8...

Страница 26: ...r 1000 pF For higher loads load regulation is added 2 The 5725A will drive up to 1000 pF of load capacitance Uncertainty specifications include loads to 300 pF and 150 pF as shown under Load Limits Fo...

Страница 27: ...2 3 8 11 160 300 2 4 100 2 2 3 8 11 70 150 2 4 190 2 2 3 8 11 50 150 2 4 1k 2 2 3 1 2 22 150 10 15 1 9k 2 2 3 1 1 5 16 150 10 15 10k 2 2 3 100 500 A 7 150 50 60 19k 2 2 3 50 250 A 5 150 100 120 100k...

Страница 28: ...within the 5700A Use the following equation to determine the error and add this error to the corresponding UNCERTAINTY or STABILITY specification Error K IL I IL X I Where Error is in m for all TWO WI...

Страница 29: ...200 1 2 5 3 1 3 10 3 100 3 1 A A3 10 A 10 10 10 10 3 Note 5 2 2 10 100 2 A 20k 2k 200 20 2 6 9 6 5 6 50 9 300 12 1 5 A 10 10 50 500 20 A 5725A ppm output A ppm output A C ppm output A A 11A 25 100 20...

Страница 30: ...450 500 14 1 A 500 50 300 40 120 40 500 500 15 1 A 22 mA 100 nA 10 20 20 40 40 1k 1k 5k 5k 10k 650 500 350 400 120 400 500 5 A 15 10 A 700 500 380 400 140 400 600 5 A 16 10 A 750 500 410 400 150 400 6...

Страница 31: ...50 4 1 10 5 50 10 10 1 20 5 50 10 1 4 Note 3 5 5 100 3 500 1 1 mA 5725A Amplifier output 11A 40 1k 1k 5k 5k 10k 75 100 100 150 200 300 20 75 40 75 100 75 30 75 50 75 100 75 3 3 Note 4 05 12 5 Notes M...

Страница 32: ...nt Settling Time To Full Accuracy Harmonic Distortion 1 1 mV 3 mV 3 mV Hz Hz ppm C Seconds dB 10 30 01 3 3 3 100 7 40 30 120 01 1 1 1 100 7 40 120 1 2k 1 1 1 1 100 5 40 1 2k 12k 1 1 1 1 100 5 40 12k 1...

Страница 33: ...5 Subpart J Class B VDE 0871 Class B Reliability MIL T 28800D para 3 13 3 Line Power 47 to 63 Hz 10 allowed about selectable nominal line voltage 100V 110V 115V 120V 200V 220V 230V 240V Maximum power...

Страница 34: ...5725A Instruction Manual 1 18...

Страница 35: ...2 Unpacking and Inspection 2 3 2 3 Service Information 2 5 2 4 Placement and Rack Mounting 2 5 2 5 Cooling Considerations 2 5 2 6 Connecting to the 5700A Calibrator 2 6 2 7 Selecting Line Voltage 2 7...

Страница 36: ...5725A Instruction Manual 2 2...

Страница 37: ...structions for inspection and claims are included in the shipping container If you need to reship the 5725A use the original container If it is not available you can order a new container from Fluke b...

Страница 38: ...OPTION NUMBER North America 120V 15A LC 1 North America 240V 15A LC 2 Universal Euro 220V 16A LC 3 United Kingdom 240V 13A LC 4 Switzerland 220V 10A LC 5 Australia 240V 10A LC 6 South Africa 240V 5A...

Страница 39: ...top stacking the 5725A is equipped with non skid feet To mount the 5725A in an equipment rack order the accessory 5725A Rack Mount Kit Model Y5735 An instruction sheet is packed with the kit Caution...

Страница 40: ...e 2 2 shows The figure shows how to dress the cable in installation arrangements with the 5725A on top or bottom 3 Connect the other end to the 5700A connector labeled 5725A The 5700A 5725A interface...

Страница 41: ...ine voltage selection switches to the correct setting shown in Figure 2 3 100V 110V 115V 120V S2 S3 S4 VOLTAGE SELECTION FUSE F8A 250V FAST 200V 220V 230V 240V S2 S3 S4 F4A 250V FAST JOHN FLUKE MFG CO...

Страница 42: ...ws 1 Turn off the POWER switch and disconnect the line power cord from ac line power 2 Insert the blade of a standard screwdriver in the slot of the fuse holder labeled FUSE 3 Turn the screwdriver cou...

Страница 43: ...onductor line power cord to a properly grounded power outlet Do not use a two conductor adapter or extension cord this will break the protective ground connection After verifying that the line voltage...

Страница 44: ...5725A Instruction Manual 2 10...

Страница 45: ...3 3 Rear Panel Features 3 6 3 4 Turning on the 5725A Amplifier 3 8 3 5 Warm Up 3 8 3 6 5725A Operating Functions and Modes 3 9 3 7 Standby 3 9 3 8 Voltage Standby 3 10 3 9 Current Standby 3 11 3 10 V...

Страница 46: ...5725A Instruction Manual 3 2...

Страница 47: ...5725A follows Please read this information before operating the amplifier Also contained in this section is a description of all 5725A operating functions and modes Because the amplifier operates unde...

Страница 48: ...anel features are called out in Figure 3 1 Each front panel feature is described in Table 3 1 CURRENT OUTPUT HI LO VOLTAGE MODE CURRENT MODE 5725A STANDBY FAULT OVERLOAD CABLE OFF POWER 1 2 3 4 5 6 7...

Страница 49: ...ndby mode the STANDBY indicator is also lit See 5725A Operating Functions and Modes further on in this section E POWER Switch Turns the power on and off The switch is a push push type the first push t...

Страница 50: ...PATENTS PENDING NO INTERNAL USER SERVICEABLE PARTS REFER SERVICE TO QUALIFIED SERVICE PERSONNEL TO CLEAN FILTER REMOVE FROM INSTRUMENT AND FLUSH WITH WARM SOAPY WATER 5700A CALIBRATOR 20V PK MAX CHAS...

Страница 51: ...trol the 5725A from the 5700A front panel or by sending remote commands to the 5700A Refer to Using an Auxiliary Amplifier in Section 4 or for remote operation to Section 5 of the 5700A Operator Manua...

Страница 52: ...5725A After the 5725A passes its self test it transfers its calibration constants to the 5700A During the transfer the BOOST indicator on the 5700A flashes For the few seconds that the BOOST indicator...

Страница 53: ...l operating mode is described in the following paragraphs For the meaning of FAULT OVERLOAD or CABLE OFF indications refer to Table 3 1 Standby 3 7 CURRENT OUTPUT HI LO VOLTAGE MODE CURRENT MODE 5725A...

Страница 54: ...dicators are lit In voltage standby mode the 5725A is not supplying an output Voltage standby occurs if 5725A is selected in a 5700A setup menu as the voltage amplifier and the next two conditions are...

Страница 55: ...g on the 5700A Output Display with the STANDBY annunciator lit If 5725A is selected in a 5700A setup menu as the current amplifier and any of the following conditions are true 1 An ac or dc current 2...

Страница 56: ...e operate mode is when only the VOLTAGE MODE indicator is lit In voltage operate mode amplified voltage output is available at the 5700A binding posts Voltage operate occurs if 5725A is selected in a...

Страница 57: ...howing on the 5700A Output Display with the OPERATE annunciator lit If 5725A is selected in a 5700A setup menu as the current amplifier and any of the following conditions are true 1 An ac or dc curre...

Страница 58: ...5725A is selected as the voltage amplifier in a setup menu Output available at the 5700A binding posts Whenever the 5700A BOOST key is toggled on while the 5700A output setting is in the operating ran...

Страница 59: ...te 4 8 4 11 Description of the Out Guard Lines 5725A Side 4 8 4 12 Description of the In Guard Lines 4 9 4 13 Functional Summaries by Assembly 4 10 4 14 Detailed Circuit Description 4 11 4 15 Intercon...

Страница 60: ...4 26 4 43 Window Comparator 4 26 4 44 Input Clamp 4 26 4 45 Transconductance and Cascode Stage 4 27 4 46 Midstage 4 27 4 47 Midstage 400V Filter 4 27 4 48 High Voltage Heat Sink Assemblies 4 27 4 49 A...

Страница 61: ...g how circuits work and contains no access procedures Overall Functional Description 4 2 The 5725A provides three primary functions for the 5700A Calibrator Extended frequency range for high ac voltag...

Страница 62: ...5725A Instruction Manual 4 4 Figure 4 1 5725A Overall Block Diagram...

Страница 63: ...rter The 5700A Oscillator DAC digital to analog converter and ac dc thermal rms converter work together with the 5725A Power Amplifier and high voltage attenuator circuits to produce the desired outpu...

Страница 64: ...nnected to the appropriate high voltage step up transformer one of three 11A Range Functional Description 4 4 The 5725A Current Amplifier is a transconductance amplifier that has a compliance voltage...

Страница 65: ...ator coming from the current shunt through the calibration amplifier circuit on the Current Assembly Voltage and Current Standby Modes 4 7 When a change in output function is selected the 5725A goes t...

Страница 66: ...d Line B CINT is a hardwire loop that allows the 5700A to detect a cable off or 5725A power off condition Description of the Out Guard Lines 5725A Side 4 11 The following list describes the five 5725A...

Страница 67: ...nse assembly with up to 260V from the 5700A Power Amplifier B CURRENT Analog line that carries the current high output from the 5700A When the user sets the current output location to 5725A in a 5700A...

Страница 68: ...ontrol Display The 5725A FAULT indicator lights A faulty 5700A 5725A interface connection could cause this problem Functional Summaries by Assembly 4 13 For an overview of all the assemblies in the 57...

Страница 69: ...erconnect Assembly A1 4 15 The Interconnect assembly A1 links the other five assemblies in the 5725A The interconnect assembly contains the following parts Connectors and traces to interconnect the ot...

Страница 70: ...at 400V dc for normal instrument operation or at 50V dc for troubleshooting Switching Section The switching section behaves like an electronic DPST switch which by command of the microprocessor or the...

Страница 71: ...sity red LEDs that provide visual indication of the presence of high voltage These LEDs have high luminosity at low current levels They are located in series with the bleeders for the positive and neg...

Страница 72: ...odes formed by R344 C305 CR305 R327 C304 CR316 and R345 C306 CR309 are included to slow supply turn on to prevent a transient current limiting condition while still allowing rapid supply turn off Resi...

Страница 73: ...ctifier CR351 A positive temperature coefficient thermistor protects the instrument from the secondary supply short circuits This prevents them from thermally stressing the power transformer Three ter...

Страница 74: ...he digital circuitry including the following Microcomputer Hitachi 6303Y CMOS External RAM CMOS static External ROM EEROM 2Kb X 8 Break detect circuitry Power up and reset circuitry Watchdog timer cir...

Страница 75: ...Theory of Operation Detailed Circuit Description 4 4 17 aq19f eps Figure 4 2 Digital Assembly Block Diagram...

Страница 76: ...e Sense A6 assemblies tie to the Data Latch external data bus output with latching relay drivers and or latches Information is strobed into the respective relay drivers latches by the state of any of...

Страница 77: ...nd refreshes the high voltage relay driver If STROBE 2 is stuck high or low during operation the first one shot is no longer retriggered and its output transitions low The second one shot configured t...

Страница 78: ...5725A Instruction Manual 4 20 aq20f eps Figure 4 3 Current Amplifier Assembly Block Diagram...

Страница 79: ...tes a standby state and several self calibration and diagnostics states during which 5725A operation is monitored and characterized by measurement circuitry and software residing in the 5700A Power Su...

Страница 80: ...to a positive polarity error amplifier output TP204 the current through R209 increases This same current flows into pin 2 of U203 causing the voltage drop across R203 to increase The voltage across R2...

Страница 81: ...are disabled with Q211 and Q213 Output is routed directly to current return path through K207 bypassing sense circuits 5700A current source is routed through K206 to the 5725A current sense path Proce...

Страница 82: ...ency of operation Signal transformers are interfaced to the High Voltage Amplifier via connector J604 Relays that select signal transformers are mentioned under the heading Signal Transformers further...

Страница 83: ...Theory of Operation Detailed Circuit Description 4 4 25 aq22f eps Figure 4 4 High Voltage Amplifier Assembly Block Diagram...

Страница 84: ...FET from turning on at the negative peaks of the input waveform The asymmetrical clamping appears as a dc shift in the waveform which can cause the transformer to saturate To alleviate this problem a...

Страница 85: ...661 provides some additional protection for Q665 and Q666 Capacitor C660 and R612 provide the dominant pole to stabilize the midstage amplifier Gain bandwidth is set to about 7 MHz Midstage 400V Filte...

Страница 86: ...the output devices connected to either end of R674 are driven just hard enough to establish the desired idle current in the output stage The current that Q653 mirrors comes from Q657 which is driven...

Страница 87: ...LTAGE TRANSFORMER OUTPUT 40 Hz to 120 Hz LF Series 1 5 5 40 to 200V 220 to 1100V 120 Hz to 3 4 kHz LF Parallel 1 5 5 40 to 200V 220 to 1100V 3 4 kHz to 30 kHz MF 1 5 5 40 to 200V 220 to 1100V 30 kHz t...

Страница 88: ...has the following six sections sense amplifier analog monitor serial interface guard crossing analog input switching control and mains switching Each section is first briefly described then described...

Страница 89: ...Theory of Operation Detailed Circuit Description 4 4 31 aq21f eps Figure 4 5 High Voltage Sense Assembly Block Diagram...

Страница 90: ...e levels Also included in this section are a simple unregulated power supply and a time delayed relay driver circuit These circuits control a shunt switch around a pair of surge current limiting NTC t...

Страница 91: ...f the 5725A circuitry B SENSE LO is the reference sense signal from the load provided through the 5700A and 5700A 5725A cable Buffering B SENSE LO ensures that the current flowing between the load and...

Страница 92: ...plexer input its description origin and purpose The state of the multiplexer is controlled by the microprocessor via data latched into U152 Table 4 4 Signals Monitored by the Analog Monitor Section ST...

Страница 93: ...sor A 5V supply is available from the 5700A via pins 19 and 20 of J101 This supply drives the optoisolator LED when the cable connections are intact The 5V supply also provides coil drive for K153 Thi...

Страница 94: ...k of relays Additionally the microprocessor has a ready means to quickly open all relays via a CLR signal that synchronously clears the driver latches The outputs of relay driver U157 control six rela...

Страница 95: ...elay K401 provides a pair of shunt switches to bypass thermistors after about a half second This allows greater efficiency than with thermistors alone and the use of thermistors allows operation if th...

Страница 96: ...5725A Instruction Manual 4 38...

Страница 97: ...5 1 Chapter 5 Calibration and Verification Title Page 5 1 Introduction 5 3 5 2 Where to Find Further Information 5 3...

Страница 98: ...5725A Instruction Manual 5 2...

Страница 99: ...to Find Further Information 5 2 Information about 5700A calibration and therefore 5725A calibration is contained in the following sections of the 5700A manual set Section 7 of the 5700A Operator Manu...

Страница 100: ...5725A Instruction Manual 5 4...

Страница 101: ...ocedure 6 7 6 8 Accessing the Power Supply Assembly A4 6 9 6 9 Accessing the Digital Assembly A5 6 9 6 10 Accessing the Current Amplifier Assembly A2 6 11 6 11 Accessing the High Voltage Amplifier A3...

Страница 102: ...5725A Instruction Manual 6 2...

Страница 103: ...correct fuse is installed for the line voltage setting Acceptable fuse types are Bussman type MTH or Littelfuse type 312 or equivalent of the appropriate amperage rating Use only a 4A 250V fast blow f...

Страница 104: ...6 1 Accessing the Fuse Cleaning the Air Filter 6 3 Caution Damage caused by overheating may occur if the area around the fan is restricted the intake air is too warm or the air filter becomes clogged...

Страница 105: ...htly dampened with water or a non abrasive mild cleaning solution that does not harm plastics Caution Do not use aromatic hydrocarbons or chlorinated solvents for cleaning They can damage the plastic...

Страница 106: ...ssembly and inserting two machined pegs into two machined holes in the chassis towards the center of the instrument Figure 6 4 shows the High Voltage Amplifier assembly A3 in the Service position Once...

Страница 107: ...the heat sink cover is removed Initial Access Procedure 6 7 Before accessing any module from the top or bottom of the instrument proceed as follows to remove the top cover and verify that high voltage...

Страница 108: ...acitor bleed off path Do not rely on an off condition as an indication that dangerous voltage no longer exists on the filter capacitors Warning Do not rely on the power supply leds as an indication of...

Страница 109: ...connectors 3 Turn over the 5725A so that the bottom is facing up 4 Remove the five retaining screws on the Power Supply assembly Lift the Power Supply assembly by pulling on the plastic wire tie loop...

Страница 110: ...5725A Instruction Manual 6 10 CAUTION WHEN REINSTALLING DIGITAL ASSEMBLY PULL RIBBON CABLE SLACK COMPLETELY INTO CHASSIS aq17f eps Figure 6 5 Accessing the Digital Assembly...

Страница 111: ...ine voltage The Current Amplifier assembly lays flat on the top of the instrument toward the front Proceed as follows to access the Current Amplifier assembly 1 Perform the Initial Access Procedure 2...

Страница 112: ...er A3 6 11 The High Voltage Amplifier assembly lays flat on the top of the instrument toward the rear To access the High Voltage Amplifier assembly simply do the Initial Access Procedure This leaves t...

Страница 113: ...if it has been accessed to the normal position and reinstall the assembly retaining screws Note When reinstalling assemblies lower them in place squarely to make sure their connectors seat correctly i...

Страница 114: ...bottom rail Labels on each heat sink identify it as P1 P2 N1 or N2 To remove a heat sink remove its two retaining screws and slide it out of the assembly Accessing the Interconnect Assembly A1 6 14 Wa...

Страница 115: ...cess procedure which removes line power and checks for high voltage on the power supply Proceed as follows to change the current output location 1 Perform the Initial Access Procedure 2 Remove the fiv...

Страница 116: ...ed connector is neatly secured in the recessed area of the chassis side away from the High Voltage Sense assembly as Figure 6 7 shows If it is allowed to hang down shorting can occur 8 Reconfiguration...

Страница 117: ...Isolation 7 6 7 5 Problems 1 or 2 Fault at Power Up or When Entering Voltage Standby 7 7 7 6 Problem 3 Fault When Entering Voltage Operate 7 8 7 7 Problem 4 Fault When Entering Current Standby 7 8 7 8...

Страница 118: ...5725A Instruction Manual 7 2...

Страница 119: ...n the Control Display press RESET first to return to the 5700A power up state 2 Press the Self Test Diags softkey 3 Press the 5725A Self Diags softkey 4 Begin testing with the voltage function Press t...

Страница 120: ...5725 400V Supply Did Not Shut Off Requires service 215 5725 Voltage Heatsink Too Hot Requires service 216 5725 Voltage Heatsink Too Hot Voltage heat sink too hot in operate 217 5725 400V Supply Too S...

Страница 121: ...ACV Cal Sensor Fault Requires service 3208 5725 Current Path To Shunt Open Requires service 3209 5725 Shunt Sense Open Requires service 3210 5725 Shunt Measurement Out Of Tolerance Requires service 3...

Страница 122: ...attached and or you are not certain the high voltage has not bled off do not wear a grounded wrist strap Wearing a strap increases risk of dangerous electrical shock If self diagnostics does not iden...

Страница 123: ...e Sense Assembly A6 schematic b If the waveform is present suspect an abnormal analog input into U151 on the High Voltage Sense Assembly A6 See Table 4 3 for voltage limits of the analog inputs for st...

Страница 124: ...monitor circuit on the High Voltage Sense Assembly as in step 1 on conditions 1 and 2 Reduced Voltage Troubleshooting Mode 7 9 The high voltage supply on the Power Supply assembly A4 allows normal op...

Страница 125: ...en you are working inside the 5725A with the power connected Use only non conductive tools and keep one hand behind your back to avoid making a circuit through your body If you work on a 5725A with th...

Страница 126: ...5725A Instruction Manual 7 10...

Страница 127: ...8 1 Chapter 8 List of Replaceable Parts Title Page 8 1 Introduction 8 3 8 2 How to Obtain Parts 8 3 8 3 Manual Status Information 8 3 8 4 Newer Instruments 8 3 8 5 Service Centers 8 4...

Страница 128: ...5725A Instruction Manual 8 2...

Страница 129: ...31 Parts price information is available from the Fluke Corporation or its representatives Prices are also available in a Fluke Replacement Parts Catalog which is available on request In the event that...

Страница 130: ...78 843081 843060 860119 F L J F D N A Table 8 1 Final Assembly Reference Designator Description Fluke Stock No Tot Qty Notes A1 INTERCONNECT PCA 843065 1 A2 CURRENT AMPLIFIER PCA 843073 1 A3 HIGH VOLT...

Страница 131: ...MP302 HANDLE INSTRUMENT GRAY 7 886341 4 MP304 INSULATOR BINDING POST FRONT G 885459 4 MP306 REAR INSULATOR GRAY 3 894183 4 MP308 BINDING POST RED 886382 2 MP309 BINDING POST BLACK 886379 2 MP310 DECAL...

Страница 132: ...5725A Instruction Manual 8 6 aq24f tif Figure 8 1 Final Assembly...

Страница 133: ...List of Replaceable Parts 8 8 7 aq25f tif Figure 8 1 Final Assembly cont...

Страница 134: ...5725A Instruction Manual 8 8 aq26f tif Figure 8 1 Final Assembly cont...

Страница 135: ...List of Replaceable Parts 8 8 9 aq27f tif Figure 8 1 Final Assembly cont...

Страница 136: ...5725A Instruction Manual 8 10 aq28f tif Figure 8 1 Final Assembly cont...

Страница 137: ...List of Replaceable Parts 8 8 11 aq29f tif Figure 8 1 Final Assembly cont...

Страница 138: ...5725A Instruction Manual 8 12 aq30f tif Figure 8 1 Final Assembly cont...

Страница 139: ...List of Replaceable Parts 8 8 13 aq31f tif Figure 8 1 Final Assembly cont...

Страница 140: ...8 218 103606 4 J1 HEADER 2 ROW 100CTR 34 PIN 836577 1 J2 HEADER 1 ROW 156CTR 10 PIN 446724 1 J100 J103 HEADER 1 ROW 100CTR RT ANG 2 851667 2 K1 RELAY ARMATURE 2 FORM C 5VDC 810911 1 K13 15 RELAY REED...

Страница 141: ...List of Replaceable Parts 8 8 15 5725A 1611 aq36f eps Figure 8 2 A1 Interconnect PCA...

Страница 142: ...50MA 500MW 203323 203323 203323 7 CR205 DIODE SI N JFET CURRENT REG IF 334839 1 CR206 DIODE SI RECT BRIDGE BV 50V IO 886945 1 CR208 219 CR222 DIODE SI 400 PIV 1 AMP 831586 831586 13 E255 TERM FASTON T...

Страница 143: ...BV 100V 50W TO 2 454041 1 Q206 TRANSISTOR SI BV 100V 40W TO 2 454033 1 Q207 TRANSISTOR SI BV 60V 200W TO 3 483222 1 Q208 TRANSISTOR SI BV 60V 200W TO 3 483230 1 Q211 TRANSISTOR SI N JFET TO 92 832154...

Страница 144: ...125W 100PP 221663 1 R281 RES MF 24 9K 1 0 125W 100PP 291369 1 R284 RES MF 44 2K 1 0 125W 25PPM 706317 1 RT201 RT202 THERMISTOR DISC 4 85 25C 838102 2 TP201 205 TP207 215 JUMPER WIRE NONINSUL 0 200CTR...

Страница 145: ...List of Replaceable Parts 8 8 19 5725A 1650 aq37f eps Figure 8 3 A2 Current Amplifier PCA...

Страница 146: ...R 10PF 10 3000V C0G 817049 1 C660 C661 CAP CER 39PF 5 1000V C0G 817031 2 C663 CAP CER 0 01UF 100 0 1600V Z 106930 1 CR602 605 CR607 612 CR651 CR653 CR655 DIODE SI BV 75V IO 150MA 500MW 203323 203323 2...

Страница 147: ...25W 343426 343426 343426 343426 12 R602 R603 R664 R683 R688 RES CF 4 7K 5 0 25W 348821 348821 5 R604 R605 RES CF 680K 5 0 25W 442517 2 R606 R607 RES MF 100K 1 0 125W 100PPM 248807 2 R608 RES MF 44 2K...

Страница 148: ...7 2 R670 673 RES CF 0 51 5 0 25W 381954 4 R695 RES CF 10M 5 25W 875257 1 RT663 ASSY THERMISTOR 843032 1 TP601 616 JUMPER WIRE NONINSUL 0 200CTR 816090 16 U601 U603 IC OP AMP DUAL LO OFFST VOLT L 68516...

Страница 149: ...List of Replaceable Parts 8 8 23 5725A 1661 aq38f eps Figure 8 4 A3 High Voltage Amplifier PCA...

Страница 150: ...715284 5 CR301 304 CR310 313 DIODE SI 1K PIV 1 0 AMP 707075 707075 8 CR305 309 CR316 CR321 DIODE SI BV 75V IO 150MA 500MW 203323 203323 7 CR314 CR315 CR319 CR320 CR322 325 CR350 CR352 354 CR356 363 DI...

Страница 151: ...70K 5 0 25W 342634 342634 4 R303 R308 R335 R339 RES CC 33K 10 1W 109538 109538 4 R304 R305 R340 R341 RES CF 33K 5 0 25W 348888 348888 4 R306 R332 R349 RES MF 10K 1 0 125W 100PPM 168260 3 R307 R309 R35...

Страница 152: ...WIRE NONINSUL 0 200CTR 816090 816090 17 U301 IC COMPARATOR DUAL LO PWR 8 PI 478354 1 U302 IC CMOS DUAL D F F EDG TRG W 536433 1 U350 U353 IC VOLT REG FIXED 5 VOLTS 1 5 647073 2 U351 IC VOLT REG FIXED...

Страница 153: ...List of Replaceable Parts 8 8 27 5725A 1631 aq39f eps Figure 8 5 A4 Power Supply PCA...

Страница 154: ...2888 1 MP501 PAD ADHESIVE 735365 1 MP815 CABLE INTERCONNECT FRONT PA 843123 1 R501 RES MF 1M 1 0 125W 100PPM 268797 1 R502 R509 RES CF 1K 5 0 25W 343426 2 R503 507 RES CF 47K 5 0 25W 348896 5 R508 RES...

Страница 155: ...List of Replaceable Parts 8 8 29 5725A 1650 aq40f eps Figure 8 6 A5 Digital PCA...

Страница 156: ...C162 C164 C165 C168 CAP CER 39PF 2 50V C0G 714840 714840 4 C180 CAP POLYES 0 47UF 10 50V 697409 1 C401 CAP AL 600UF 75 10 15V SOLV 557660 1 C402 CAP AL 47UF 20 50V SOLV PRO 822403 1 C403 CAP CER 0 22U...

Страница 157: ...Q401 TRANSISTOR SI N MOS 350MW TO 9 783449 3 Q105 TRANSISTOR SI PNP 40V 0 35W TO 698233 1 Q106 Q150 TRANSISTOR SI NPN SMALL SIGNAL 698225 2 R100 R123 R124 R157 R159 161 R163 167 R177 RES CF 1 5K 5 0...

Страница 158: ...H SLIDE DPDT LINE SELECT 817353 3 TP100 TP101 TP103 107 TP151 154 TP156 TP157 TP159 161 JUMPER WIRE NONINSUL 0 200CTR 816090 816090 816090 816090 20 U100 IC OP AMP VLOW IB LOW VOS 8 PI 875760 1 U101 R...

Страница 159: ...List of Replaceable Parts 8 8 33 5725A 1601 aq41f eps Figure 8 7 A6 High Voltage Sense PCA...

Страница 160: ...4 H73 SCREW PH P LOCK STL 6 32 375 152165 2 H75 SCREW PH P LOCK STL 10 32 625 114066 2 MP1 BUSHING SNAP IN NYL 500 ID 102780 3 MP4 CABLE ACC CLAMP 687 DIA SCREW 853775 2 MP12 MACHINED SHEET METAL XFOR...

Страница 161: ...List of Replaceable Parts 8 8 35 aq32f tif Figure 8 8 A12 Transformer Enclosure Assembly...

Страница 162: ...5725A Instruction Manual 8 36 aq33f tif Figure 8 8 A12 Transformer Enclosure Assembly cont...

Страница 163: ...List of Replaceable Parts 8 8 37 aq34f tif Figure 8 8 A12 Transformer Enclosure Assembly cont...

Страница 164: ...5725A Instruction Manual 8 38 aq35f tif Figure 8 8 A12 Transformer Enclosure Assembly cont...

Страница 165: ...ductor PCA Reference Designator Description Fluke Stock No Tot Qty Notes J1 CONN MATE N LOK HEADER 4 PIN 512269 1 L1 L2 CHOKE 490888 2 W1 HARNESS LINE VOLTAGE 843011 1 1 For schematic See A6 section 9...

Страница 166: ...5725A Instruction Manual 8 40...

Страница 167: ...Title Page 9 1 A1 Interconnect PCA 9 3 9 2 A2 Current Amplifier PCA 9 6 9 3 A3 High Voltage Amplifier PCA 9 10 9 4 A4 Power Supply PCA 9 13 9 5 A5 Digital PCA 9 16 9 6 A6 High Voltage Sense PCA 9 18 9...

Страница 168: ...5725A Instruction Manual 9 2...

Страница 169: ...Schematic Diagrams 9 3 9 Figure 9 1 A1 Interconnect PCA 5725A 1611 aq48f eps...

Страница 170: ...5725A Instruction Manual 9 4 Figure 9 1 A1 Interconnect PCA cont...

Страница 171: ...Schematic Diagrams 9 5 9 Figure 9 1 A1 Interconnect PCA cont...

Страница 172: ...5725A Instruction Manual 9 6 Figure 9 2 A2 Current Amplifier PCA 5725A 1650 aq52f eps...

Страница 173: ...Schematic Diagrams 9 7 9 Figure 9 2 A2 Current Amplifier PCA cont...

Страница 174: ...5725A Instruction Manual 9 8 Figure 9 2 A2 Current Amplifier PCA cont...

Страница 175: ...Schematic Diagrams 9 9 9 Figure 9 2 A2 Current Amplifier PCA cont...

Страница 176: ...5725A Instruction Manual 9 10 Figure 9 3 A3 High Voltage Amplifier PCA 5725A 1661 aq56f eps...

Страница 177: ...Schematic Diagrams 9 11 9 Figure 9 3 A3 High Voltage Amplifier PCA cont...

Страница 178: ...5725A Instruction Manual 9 12 Figure 9 3 A3 High Voltage Amplifier PCA cont...

Страница 179: ...Schematic Diagrams 9 13 9 Figure 9 4 A4 Power Supply PCA 5725A 1631 aq59f eps...

Страница 180: ...5725A Instruction Manual 9 14 Figure 9 4 A4 Power Supply PCA cont...

Страница 181: ...Schematic Diagrams 9 15 9 Figure 9 4 A4 Power Supply PCA cont...

Страница 182: ...5725A Instruction Manual 9 16 Figure 9 5 A5 Digital PCA aq62f eps 5725A 1650 aq43f eps 100 90 10 0 2 V 10 ms TYPICAL COMMUNICATIONS ACTIVITY AT PINS 12 AND 13 OF U507...

Страница 183: ...Schematic Diagrams 9 17 9 Figure 9 5 A5 Digital PCA cont...

Страница 184: ...5A Instruction Manual 9 18 Figure 9 6 A6 High Voltage Sense PCA 100 90 10 0 1 V 10 ms 100 90 10 0 1 V 10 ms VOLTAGE STANDBY STANDBY 100 90 10 0 1 V 10 ms CURRENT STANDBY A aq44f eps 5725A 1601 aq63f e...

Страница 185: ...Schematic Diagrams 9 19 9 Figure 9 6 A6 High Voltage Sense PCA cont...

Страница 186: ...5725A Instruction Manual 9 20 Figure 9 6 A6 High Voltage Sense PCA cont...

Страница 187: ...Schematic Diagrams 9 21 9 Figure 9 6 A6 High Voltage Sense PCA cont...

Страница 188: ...5725A Instruction Manual 9 22 Figure 9 6 A6 High Voltage Sense PCA cont...

Страница 189: ...Schematic Diagrams 9 9 23 aq45f eps Figure 9 7 A12 Transformer Enclosure Assembly...

Страница 190: ...5725A Instruction Manual 9 24...

Страница 191: ...ting the 5725A output 3 12 3 13 3 14 Analog monitor on High Voltage Sense assembly faults 7 7 Assembly location internal 6 6 Autobias sense circuit 4 28 High voltage amplifier feedback 4 29 High volta...

Страница 192: ...e 3 13 Current standby 3 11 Standby 3 9 Voltage operate 3 12 Voltage standby 3 10 Fuse 2 8 3 5 Accessing the main fuse 2 8 6 3 Internal fuse data 4 13 Replacing the main fuse 6 3 H High Voltage Amplif...

Страница 193: ...7 Voltage standby mode 3 10 4 7 Switches CALIBRATION 3 7 Line voltage selection 2 7 3 7 POWER 3 5 T Terminals CHASSIS GROUND 3 7 CURRENT OUTPUT 3 5 3 7 HI 3 5 3 7 LOW 3 5 3 7 Troubleshooting 7 3 Faul...

Страница 194: ...5725A Instruction Manual 4...

Страница 195: ...Page Count 1 Revision Date 6 6 96 This supplement contains information necessary to ensure the accuracy of the above manual Enter the corrections in the manual if either one of the following condition...

Страница 196: ...ent Amplifier assembly lays flat on the top of the instrument toward the front To The Current Amplifier assembly lays flat on the top of the instrument toward the rear On page 6 12 paragraph 6 11 chan...

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