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5725A

Instruction Manual

1-8

AC Voltage

Range

Resolution

Frequency

Absolute Uncertainty

±

 5°C from calibration temperature

Relative Uncertainty

±

 1°C

24 Hours

90 Days

180 Days

1 Year

24 Hours

90 Days

Hz

±

 (ppm  

µ

V)

±

 (ppm  

µ

V)

2.2 mV

1 nV

10-20
20-40

40-20k

20k-50k

50k-100k

100k-300k
300k-500k

500k-1M

500 + 5
200 + 5
100 + 5
340 + 5
800 + 8

.11% + 15
.15% + 30

.4% + 40

550 + 5
220 + 5
110 + 5
370 + 5
900 + 8

.12% + 15
.17% + 30

.44% + 4

600 + 5
230 + 5
120 + 5
390 + 5
950 + 8

.13% + 15
.17% + 30
.47% + 40

600 + 5
240 + 5
120 + 5
410 + 5
950 + 8

.13% + 15
.18% + 30
.48% + 40

500 + 5
200 + 5

60 + 5

100 + 5
220 + 8

400 + 15

 .10% + 30

.3% + 30

550 + 5
220 + 5

65 + 5

110 + 5
240 + 8

440 + 15

.11% + 30
.33% + 30

22 mV

10 nV

10-20
20-40

40-20k

20k-50k

50k-100k

100k-300k
300k-500k

500k-1M

500 + 6
200 + 6
100 + 6
340 + 6
800 + 8

.11% + 15
.15% + 30

.4% + 40

550 + 6
220 + 6
110 + 6
370 + 6
900 + 8

.12% + 15
.17% + 30

.44% + 4

600 + 6
230 + 6
120 + 6
390 + 6
950 + 8

.13% + 15
.17% + 30
.47% + 40

600 + 6
240 + 6
120 + 6
410 + 6
950 + 8

.13% + 15
.18% + 30
.48% + 40

500 + 6
200 + 6

60 + 6

100 + 6
220 + 8

400 + 15

 .10% + 30

.3% + 30

550 + 6
220 + 6

65 + 6

110 + 6
240 + 8

440 + 15

.11% + 30
.33% + 30

220 mV

100 nV

10-20
20-40

40-20k

20k-50k

50k-100k

100k-300k
300k-500k

500k-1M

500 + 16
200 + 10

95 + 10

300 + 10
750 + 30
940 + 30

.15% + 40

.30% + 100

550 + 16
220 + 10
100 + 10
330 + 10
800 + 30
.1% + 30

.17% + 40

.33% + 100

600 + 16
230 + 10
110 + 10
350 + 10
850 + 30

.11% + 30
.17% + 40

.35% + 100

600 + 16
240 + 10
110 + 10
360 + 10
900 + 30

.11% + 30
.18% + 40

.36% + 100

500 + 16
200 + 10

60 + 10

100 + 10
220 + 30
400 + 30
.1% + 40

.3% + 100

550 + 16
220 + 10

65 + 10

110 + 10
240 + 30
440 + 30

.11% + 40

.33% + 100

2.2V

1

 µ

V

10-20
20-40

40-20k

20k-50k

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% + 400

.23% + 1 mV

600 + 100

180 + 30

85 + 7

140 + 20
280 + 80

480 + 150

.12% + 400

.24% + 1 mV

500 + 100

150 + 30

40 + 7

100 + 20
200 + 80

400 + 150
.1% + 400

.2% + 1 mV

550 + 100

170 + 30

45 + 7

110 + 20
220 + 80

440 + 150

.11% + 400

.22% + 1 mV

22V

10

 µ

V

10-20
20-40

40-20k

20k-50k

50k-100k

100k-300k
300k-500k

500k-1M

500 + 1 mV

150 + 300

70 + 70

120 + 200
230 + 400

500 + 1.7 mV

.12% + 5 mV
.26% + 9 mV

550 + 1 mV

170 + 300

75 + 70

130 + 200
250 + 400

550 + 1.7 mV

.13% + 5 mV
.28% + 9 mV

600 + 1 mV

170 + 300

80 + 70

140 + 200
270 + 400

550 + 1.7 mV

.13% + 5 mV
.29% + 9 mV

600 + 1 mV

180 + 300

85 + 70

140 + 200
280 + 400

600 + 1.7 mV

.14% + 5 mV
.30% + 9 mV

500 + 1 mV

150 + 300

40 + 70

100 + 200
200 + 400

 500 + 1.7 mV

 .12% + 5 mV
 .26% + 9 mV

550 + 1 mV

170 + 300

45 + 70

110 + 200
220 + 400

550 + 1.7 mV

.13% + 5 mV
.28% + 9 mV

±

 (ppm  mV)

±

 (ppm  mV)

220V

100

 µ

V

10-20
20-40

40-20k

20k-50k

50k-100k

100k-300k
300k-500k

500k-1M

500 + 10

150 + 3

75 + 1

200 + 4

500 + 10

.15% + 110
.50% + 110

1.20% + 220

550 + 10

170 + 3

80 + 1

220 + 4

550 + 10

.15% + 110
.52% + 110

1.25% + 220

600 + 10

170 + 3

85 + 1

240 + 4

600 + 10

.16% + 110
.53% + 110

1.25% + 220

600 + 10

180 + 3

90 + 1

250 + 4

600 + 10

.16% + 110
.54% + 110

1.30% + 220

500 + 10

150 + 3

45 + 1

100 + 1

300 + 10

 .15% + 110
 .50% + 110

 1.20% + 220

550 + 10

170 + 3

50 + 1

110 + 1

330 + 10

.15% + 100
.52% + 110

 1.20% + 220

1100V

11 mV

50-1k

75 + 4

80 + 4

85 + 4

90 + 4

50 + 4

55 + 4

5725A Amplifier:

1100V

1 mV

40-1k

1k-20k

20k-30k

75 + 4

105 + 6

230 + 11

80 + 4

125 + 6

360 + 11

85 + 4

135 + 6

440 + 11

90 + 4

165 + 6

600 + 11

50 + 4
85 + 6

160 + 11

55 + 4

105 + 6

320 + 11

750V

30k-50k

50k-100k

230 + 11
600 + 45

360 + 11

.13% + 45

440 + 11

.16% + 45

600 + 11

.23% + 45

160 + 11
380 + 45

320 + 11

.12% + 45

Summary of Contents for 5725A

Page 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...

Page 2: ......

Page 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...

Page 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...

Page 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...

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

Page 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...

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

Page 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...

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

Page 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...

Page 12: ......

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

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

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

Page 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...

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

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

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

Page 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...

Page 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...

Page 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...

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

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

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

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

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

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

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

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

Page 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...

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

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

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

Page 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...

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

Page 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...

Page 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...

Page 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...

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

Page 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...

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

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

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

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

Page 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...

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

Page 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...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Page 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...

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

Page 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...

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

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

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

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

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

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

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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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