Fluke 5725A Instruction Manual
  1. Manuals
  2. Brands
  3. Fluke Manuals
  4. Amplifier
  5. 5725A
  6. Instruction manual
Fluke 5725A Instruction Manual

Fluke 5725A Instruction Manual

Fluke amplifier instruction manual
Hide thumbs Also See for 5725A:
Table of Contents

Advertisement

Quick Links

®
5725A
Amplifier
Instruction Manual
PN 823435
January 1989
Rev. 7, 6/02
© 1993, 1996, 2002 Fluke Corporation, All rights reserved. Printed in U.S.A.
All product names are trademarks of their respective companies.

Advertisement

Table of Contents
loading

Related Manuals for Fluke 5725A

Summary of Contents for Fluke 5725A

  • Page 1 ® 5725A Amplifier Instruction Manual PN 823435 January 1989 Rev. 7, 6/02 © 1993, 1996, 2002 Fluke Corporation, All rights reserved. Printed in U.S.A. All product names are trademarks of their respective companies.
  • Page 2 Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers only but have no authority to extend a greater or different warranty on behalf of Fluke. Warranty support is available only if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable international price.

  • Page 3: Table Of Contents

    Introduction ... 1-3 1-2. Where to Go From Here... 1-4 1-3. How to Use the Manuals ... 1-5 1-4. 5725A Getting Started Manual ... 1-5 1-5. 5725A Instruction Manual ... 1-5 1-6. 5700A/5720A Series II Manual Set ... 1-5 1-7.
  • Page 4 Voltage and Current Standby Modes ... 4-7 Voltage Standby... 4-7 Current Standby... 4-7 How the 5700A and 5725A Communicate ... 4-8 Description of the Out-Guard Lines (5725A Side) ... 4-8 Description of the In-Guard Lines... 4-9 Functional Summaries by Assembly... 4-10 Interconnect Assembly (A1) ... 4-11 Power Supply Assembly (A4)...
  • Page 5 6-15. Enabling Front or Rear Binding Posts... 6-15 Troubleshooting... 7-1 7-1. Introduction ... 7-3 7-2. 5725A Fault Codes... 7-3 7-3. Self Diagnostics... 7-3 7-4. Manual Tests for Fault Isolation ... 7-6 7-5. Problems 1 or 2: Fault at Power-Up or When Entering Voltage Standby...
  • Page 6 5725A Instruction Manual List of Replaceable Parts ... 8-1 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... 8-3 8-6. Parts Lists ... 8-4 Schematic Diagrams... 9-1...
  • Page 7 1-20. AC Current Secondary Performance Specifications and Operating Characteristics ... 1-27 1-21. Wideband AC Voltage (Option 5700-03) Specifications... 1-28 2-1. Standard Equipment... 2-3 2-2. Line Power Cord Types Available from Fluke... 2-4 3-1. Front Panel Features ... 3-5 3-2. Rear Panel Features ... 3-7 4-1.
  • Page 8 5725A Instruction Manual 7-2. Analog Monitor Faults... 7-7 8-1. Manual Status Information ... 8-4 8-2. Final Assembly ... 8-4 8-3. A1 Interconnect PCA... 8-15 8-4. A2 Current Amplifier PCA... 8-17 8-5. A3 High Voltage Amplifier PCA ... 8-21 8-6. A4 Power Supply PCA ... 8-25 8-7.
  • Page 9 Figure 1-1. Volt-Hertz Capability ... 1-15 2-1. Line Power Cords Available for Fluke Instruments ... 2-4 2-2. Correct Way to Dress Interface Cable ... 2-6 2-3. Line Power Label and Switch Location... 2-7 2-4. Accessing the Fuse ... 2-8 3-1.
  • Page 10 5725A Instruction Manual viii...
  • Page 11 20402. Stock No. 004-000-00345-4. Declaration of the Manufacturer or Importer We hereby certify that the Fluke Model 5725A Amplifier is in compliance with BMPT Vfg 243/1991 and is RFI suppressed. The normal operation of some equipment (e.g. signal generators) may be subject to specific restrictions.

  • Page 13: Operator Safety

    OPERATOR SAFETY SUMMARY WARNING HIGH VOLTAGE is used in the operation of this equipment LETHAL VOLTAGE may be present on the terminals, observe all safety precautions! To avoid electrical shock hazard, the operator should not electrically contact the output hi or sense hi binding posts. During operation, lethal voltages of up to 1100V ac or dc may be present on these terminals.

  • Page 14: Power Source

    Power Source The 5725A is intended to operate from a power source that will not apply more than 264V ac rms between the supply conductors or between either supply conductor and ground.
  • Page 15 SERVICING SAFETY SUMMARY FOR QUALIFIED SERVICE PERSONNEL ONLY Also refer to the preceding Operator Safety Summary Do Not Service Alone Do not perform internal service or adjustment of this product unless another person capable of rendering first aid and resuscitation is present. Use Care When Servicing With Power On Dangerous voltage exist at many points inside this product.
  • Page 16 Free the Victim From the Live Conductor Shut off high voltage at once and ground the circuit. If high voltage cannot be turned off quickly, ground the circuit. If the circuit cannot be broken or grounded, use a board, dry clothing, or other nonconductor to free the victim.

  • Page 17: Introduction And Specifications

    Introduction ... 1-3 1-2. Where to Go From Here... 1-4 1-3. How to Use the Manuals ... 1-5 1-4. 5725A Getting Started Manual ... 1-5 1-5. 5725A Instruction Manual ... 1-5 1-6. 5700A/5720A Series II Manual Set ... 1-5 1-7.
  • Page 18 5725A Instruction Manual...

  • Page 19: Introduction

    5725A. Increased ac voltage load limits allow using the 5700A Calibrator in systems with long cables. Voltage output from the 5725A is available at the 5700A Calibrator front or rear binding posts. This eliminates the need to move cables during a procedure that requires amplified as well as standard calibrator outputs.

  • Page 20: Where To Go From Here

    UUT (Unit Under Test), and self calibration are covered in the 5700A/5720A Series II Operator Manual. The list below gives some specific pointers, and the text further on describes how to use all the manuals to find 5725A information. For More Information About:...

  • Page 21: How To Use The Manuals

    5725A.) Although the instruction manual also contains a section devoted to 5725A operating notes, once the 5725A is up and running you will find that the 5700A/5720A Operator Manual contains most of the information you need to operate the 5725A.

  • Page 22: 5700A/5720A Series Ii Remote Programming Reference Guide

    Specifications are valid after allowing a warm-up period of 30 minutes, or if the 5725A has been recently on, twice the time the 5725A has been turned off. For example, if the 5725A has been turned off for five minutes, the warm-up period is ten minutes.

  • Page 23: Dc Voltage Specifications

    1-12. DC Voltage Specifications Table 1-1. 5720A Series II DC Voltage Specifications: 99 % and 95 % Confidence Levels 5720A 99 % Confidence Level For fields strengths >1 V/m but 3 V/m, Range Resolution 24 Hours 220 mV 10 nV 5 + 0.5 2.2 V 100 nV...

  • Page 24: A Series Ii Dc Voltage Specifications: 99 % And 95 % Confidence Levels

    5725A Instruction Manual Table 1-2. 5700A Series II DC Voltage Specifications: 99 % and 95 % Confidence Levels 5700A 99 % Confidence Level Range Resolution 220 mV 10 nV 2.2 V 100 nV 11 V 22 V 220 V 10 V...

  • Page 25: Dc Voltage Secondary Performance Specifications And Operating Characteristics

    Table 1-3. DC Voltage Secondary Performance Specifications and Operating Characteristics Range Stability [Note 1] ± 1 °C 24 Hours (ppm output + V) 220 mV 0.3 + 0.3 2.2 V 0.3 + 1 11 V 0.3 + 2.5 22 V 0.4 + 5 220 V 0.5 + 40...

  • Page 26: Ac Voltage Specifications

    500 k - 1 M 1 mV 0015 - 50 1100 V [Note 1] 0050 - 1 k 5725A Amplifier: 0040 - 1 k 001 k - 20 k 1100 V 020 k - 30 k 1 mV 030 k - 50 k...

  • Page 27: A Series Ii Ac Voltage Specifications: 95 % Confidence Level

    7500 + 80 0240 + 16 0260 + 16 0280 + 16 0055 + 3.5 0060 + 3.5 0065 + 3.5 5725A Amplifier: 0075 + 4 0080 + 4 0085 + 4 0105 + 6 0125 + 6 0135 + 6...

  • Page 28: A Series Ii Ac Voltage Specifications: 99 % Confidence Level

    500 k - 1 M 1100 V 1 mV 00015 - 50 [Note 1] 00050 - 1 k 5725A Amplifier: 1100 V 1 mV 00040 - 1 k 0001 k - 20 k 0020 k - 30 k 750 V...

  • Page 29: A Series Ii Ac Voltage Specifications: 95 % Confidence Level

    11,300 + 190 340 + 16 00360 + 16 00380 + 16 65 + 3.5 70 + 3.5 75 + 3.5 5725A Amplifier: 75 + 4 80 + 4 85 + 4 105 + 6 125 + 6 135 + 6...

  • Page 30: Ac Voltage Secondary Performance Specifications And Operating Characteristics

    5725A Instruction Manual Table 1-8. AC Voltage Secondary Performance Specifications and Operating Characteristics Range Frequency 0010 - 20 0020 - 40 0040 - 20 k 2.2 mV 020 k - 50 k 050 k - 100 k 100 k - 300 k...

  • Page 31: Volt-Hertz Capability

    1 Stability specifications are included in Absolute Uncertainty values for the primary specifications. 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." For capacitances up to the maximum of 1000 pF, add "Load Regulation."...

  • Page 32: Resistance Specifications

    5725A Instruction Manual 1-14. Resistance Specifications Table 1-9. 5720A Series II Resistance Specifications: 99 % and 95 % Confidence Levels 5720A 99% Confidence Level Nominal Absolute Uncertainty of Characterized Value Value 5 °C from calibration temperature [Note 1] 24 Hours 1.9 k...

  • Page 33: A Series Ii Resistance Specifications: 99 % And 95 % Confidence Levels

    Table 1-10. 5700A Series II Resistance Specifications: 99 % and 95 % Confidence Levels 5700A 99 % Confidence Level Nominal Absolute Uncertainty of Characterized Value Value 5 °C from calibration temperature [Note 1] 24 Hours 90 Days 1.9 k 10 k 19 k 100 k 190 k...

  • Page 34: Resistance Secondary Performance Specifications And Operating Characteristics

    5725A Instruction Manual Table 1-11. Resistance Secondary Performance Specifications and Operating Characteristics Nominal Stability Value 1 °C [Note 1] 24 Hours 1.9 k 10 k 19 k 100 k 190 k 1.9 M 10 M 19 M 100 M Notes: Stability specifications are included in the Absolute Uncertainty values in the primary specification tables.

  • Page 35: Current Derating Factors

    Table 1-12. Current Derating Factors Nominal Value Two-Wire Comp SHORT 1.9 k 10 k 19 k 100 k 190 k 1.9 M 10 M 19 M 100 M Notes: < errors occur due to thermally generated voltages w equat on to determ ne the error, and add th spec Error = K(...

  • Page 36: Dc Current Specifications

    Maximum output from calibrator terminals is 2.2 A. Uncertainty specifications for 220 mA and 2.2 mA Note: ranges are increased by a factor of 1.3 when supplied through 5725A terminals. Specifications are otherwise identical for all output locations. Add to uncertainty specifications: 200 x ppm for >100 mA on 220 mA range...

  • Page 37: A Series Ii Dc Current Specifications: 99 % And 95 % Confidence Levels

    Maximum output from the calibrator’s terminals is 2.2 A. Uncertainty specifications for 220 mA and Note: 2.2 mA ranges are increased by a factor of 1.3 when supplied through 5725A terminals. Specifications are otherwise identical for all output locations. Add to uncertainty specifications: 200 x ppm for >100 mA on 220 mA range...

  • Page 38: Dc Current Secondary Performance Specifications And Operating Characteristics

    0.5 V. For higher loads, multiply uncertainty specification by: The calibrator’s compliance limit is 2 V for outputs from 1 A to 2.2 A. 5725A Amplifier may be used in range- lock mode down to 0 A. Minimum output: 0 for all ranges, including 5725A.

  • Page 39: Ac Current Specifications

    Note: Maximum output from the calibrator’s terminals is 2.2 A. Uncertainty specifications for 220 A and 2.2 mA ranges are increased by a factor of 1.3 plus 2 A when supplied through 5725A terminals. Specifications are otherwise identical for all output locations.

  • Page 40: A Series Ii Ac Current Specifications: 95 % Confidence Level

    Note: Maximum output from the calibrator’s terminals is 2.2 A. Uncertainty specifications for 220 A and 2.2 mA ranges are increased by 1.3 x plus 2 A when supplied through 5725A terminals. Specifications are otherwise identical for all output locations.

  • Page 41: A Series Ii Ac Current Specifications: 99 % Confidence Level

    Note: Maximum output from the calibrator’s terminals is 2.2 A. Uncertainty specifications for 220 A and 2.2 mA ranges are increased by 1.3 x plus 2 A when supplied through 5725A terminals. Specifications are otherwise identical for all output locations.

  • Page 42: A Series Ii Ac Current Specifications: 95 % Confidence Level

    Note: Maximum output from the calibrator’s terminals is 2.2 A. Uncertainty specifications for 220 A and 2.2 mA ranges are increased by a factor of 1.3 plus 2 A when supplied through 5725A terminals. Specifications are otherwise identical for all output locations.

  • Page 43: Ac Current Secondary Performance Specifications And Operating Characteristics

    Range (Hz): 10.000-11.999, 12.00-119.99, 120.0-1199.9, 1.200 k-10.000 k Uncertainty: 0.01 % Resolution: 11,999 counts Settling time to full accuracy: 5 seconds for 5700A/5720A ranges; 6 seconds for 5725A 11 A range; +1 second for amplitude or frequency range change. Overshoot: <10 %...

  • Page 44: Wideband Ac Voltage (Option 5700-03) Specifications

    5725A Instruction Manual 1-17. Wideband AC Voltage (Option 5700-03) Specifications Table 1-21. Wideband AC Voltage (Option 5700-03) Specifications Specifications apply to the end of the cable and 50 Range Volts 1.1 mV 3 mV 11 mV 33 mV 110 mV -6.2...

  • Page 45: General Specifications

    5700A/5720A: Height 17.8 cm (7 in), standard rack increment, plus 1.5 cm (0.6 in) for feet; Width 43.2 cm (17 in), standard rack width; Depth 63.0 cm (24.8 in), overall; 57.8 cm (22.7 in), rack depth. 5725A: Height 13.3 cm, (5.25 in); Width and depth same as 5700A/5720A. Both units project 5.1 cm, (2 in) from rack front.

  • Page 46: Auxiliary Amplifier Specifications

    5725A Instruction Manual 1-19. Auxiliary Amplifier Specifications For complete specifications, see the 5205A and 5220A Operators Manuals. 5205A (220V - 1100 V ac, 0 V - 1100 V dc) Overshoot: < 10 % Distortion (bandwidth 10 Hz - 1 MHz):...

  • Page 47: Installation

    Title 2-1. Introduction ... 2-3 2-2. 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 2-8.
  • Page 48 5725A Instruction Manual...

  • Page 49: Introduction

    Instructions 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 by identifying the amplifier’s model and serial number.

  • Page 50: Line Power Cord Types Available From Fluke

    North America North America Universal Euro United Kingdom Switzerland Australia South Africa LC-1 LC-5 Figure 2-1. Line Power Cords Available for Fluke Instruments Table 2-2. Line Power Cord Types Available from Fluke VOLTAGE/CURRENT 120V/15A 240V/15A 220V/16A 240V/13A 220V/10A 240V/10A 240V/5A...

  • Page 51: Service Information

    Air entering the instrument must be room temperature. Make sure that exhaust from another instrument is not directed into the fan inlet. Clean the fan filter every 30 days, or more frequently if the 5725A is operated in a dusty environment. (Instructions for cleaning the fan filter are in Section 6.)

  • Page 52: Connecting To The 5700A Calibrator

    1. Turn the power off for both instruments and disconnect their line power cords. 2. Connect either end of the interface cable to the 5725A connector labeled 5700A. Dress the cable only as Figure 2-2 shows. The figure shows how to dress the cable in installation arrangements with the 5725A on top or bottom.

  • Page 53: Selecting Line Voltage

    Check the line power label on the rear panel of the 5725A to verify that the line voltage matches local line power. Figure 2-3 shows the location of the line power label and switches, and the switch settings for each line voltage.

  • Page 54: Accessing The Fuse

    200-240V. A spare 4A, 250V fuse is shipped with the 5725A to ensure that one is available for use on the 200-240V range. The line power fuse is accessible on the rear panel. The fuse rating label to the right of the fuse holder (labeled FUSE) shows the correct replacement fuse rating for each line voltage setting.

  • Page 55: Connecting To Line Power

    Do not use a two-conductor adapter or extension cord; this will break the protective ground connection. After verifying that the line voltage selection switches are correctly set, verify that the correct fuse is installed. Connect the 5725A to a properly grounded three-prong outlet. Warning Installation...
  • Page 56 5725A Instruction Manual 2-10...

  • Page 57: Operating Notes

    Title 3-1. Introduction ... 3-3 3-2. Front Panel Features... 3-4 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.
  • Page 58 5725A Instruction Manual...

  • Page 59: Introduction

    This section provides setup and operation information for the 5725A Amplifier. This section begins with a reference for the 5725A front and rear panel features. Information about setting up and powering up the 5725A follows. Please read this information before operating the amplifier.

  • Page 60: Front Panel Features

    3-2. Front Panel Features Front panel features are called out in Figure 3-1. Each front panel feature is described in Table 3-1. CURRENT OUTPUT VOLTAGE MODE CURRENT MODE 5725A STANDBY FAULT OVERLOAD CABLE OFF Figure 3-1. Front Panel Features POWER aq6f.eps...

  • Page 61: Front Panel Features

    Table 3-1. Front Panel Features CURRENT OUTPUT Binding Posts The source of all amplified current if the 5725A is configured for front output. You can set the 5700A to source all unamplified as well as amplified current through these binding posts. The LO binding post is isolated from ground when in the current function, and is open-circuited at other times.

  • Page 62: Rear Panel Features

    S2 S3 S4 200V 220V F4A 250V 230V (FAST) 240V Figure 3-2. Rear Panel Features JOHN FLUKE MFG. CO., INC. MADE IN U.S.A. PATENTS PENDING CURRENT NO INTERNAL USER SERVICEABLE OUTPUT PARTS REFER SERVICE TO QUALIFIED SERVICE PERSONNEL TO CLEAN FILTER...

  • Page 63: Rear Panel Features

    Table 3-2. Rear Panel Features CURRENT OUTPUT Binding Posts The source of all amplified current if the 5725A is configured for rear output. You can set the 5700A to source all its unamplified as well as amplified current through these binding posts. The LO binding post is isolated from ground when in the current function, and is open-circuited at other times.

  • Page 64: Turning On The 5725A Amplifier

    Section 1. If you turn off the 5725A after it has warmed up, allow it to warm up again for at least twice the length of time it was turned off (up to a maximum of 30 minutes of warm-up).

  • Page 65: 5725A Operating Functions And Modes

    Standby mode is when only the 5725A STANDBY indicator is lit. In standby mode, the 5725A is not supplying an output. However, the 5700A, depending on how it is set, can be supplying up to 1100V or 2.2A. Standby occurs under any of the following conditions: At power-up with no pending 5725A entry on the 5700A.

  • Page 66: Voltage Standby

    Voltage standby mode is when both VOLTAGE MODE and 5725A STANDBY indicators 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 true: An ac voltage 220V or above is showing on the 5700A Output Display with the STANDBY annunciator lit.

  • Page 67: Current Standby

    When the 5700A current output location is set to "5725A", and any ac or dc current level is showing 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.

  • Page 68: Voltage Operate

    Voltage 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 5700A setup menu as the voltage amplifier, and the next two conditions are true: An ac voltage 220V or above is showing on the 5700A Output Display with the OPERATE annunciator lit.

  • Page 69: Current Operate

    5725A binding posts. Current operate occurs under the following conditions: When, on the 5700A, the current output location is set to "5725A", and any ac or dc current level is showing on the 5700A Output Display with the OPERATE annunciator lit.

  • Page 70: Conditions That Activate The 5725A

    5700A current is supplied through the 5725A binding posts when, on the 5700A, the current output location is set to "5725A"; the 5700A output is set to any ac or dc current level; and the 5700A OPERATE annunciator is lit.

  • Page 71: Theory Of Operation

    Voltage Standby... 4-7 4-9. Current Standby... 4-7 4-10. How the 5700A and 5725A Communicate ... 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.
  • Page 72 5725A Instruction Manual 4-30. 4-31. 4-32. 4-33. 4-34. 4-35. 4-36. 4-37. 4-38. 4-39. 4-40. 4-41. 4-42. 4-43. 4-44. 4-45. 4-46. 4-47. 4-48. 4-49. 4-50. 4-51. 4-52. 4-53. 4-54. 4-55. 4-56. 4-57. 4-58. 4-59. 4-60. Optoisolator Link... 4-18 Break-Detect Circuitry... 4-19 Power Up and Reset Circuitry ...

  • Page 73: Introduction

    The 5725A also has a secondary function of sourcing all 5700A current outputs (without the 5700A Current guard) through its own binding posts, if so selected at the 5700A front panel controls. Refer to Figure 4-1, the overall block diagram of the 5725A, for this discussion. Each 5725A function is described briefly next.

  • Page 74: A Overall Block Diagram

    5725A Instruction Manual Figure 4-1. 5725A Overall Block Diagram...

  • Page 75: 1100V Ac Range Functional Description

    The 11A dc function is implemented with a transconductance (voltage in/current out) amplifier with a gain of -5. If the 5700A outputs -2V into the 5725A, the 5725A output is 10A. (This is transparent to the user.) The output range is 0 to 11A. The 5725A delivers amplified current to either the front or rear panel binding posts of the 5725A, depending on an internal hardware setup.

  • Page 76: Range Functional Description

    B-FEEDBACK (for dc current) and enters the High Voltage Sense assembly. From there it is routed to the error amplifier on the Current assembly whenever the 5725A is in the current function. The B-FEEDBACK line returns the current calibration amplifier output to OSC SENSE HI during ac current operation.

  • Page 77: Operation In The 11A Dc Range

    2V dc range drives an error amplifier with an input impedance of 40 k . The gain of this amplifier is determined by this 40 k resistor with a 4 k feedback resistor, and the value of the precision shunt. The 5725A uses a 0.02 shunt for the 11A function. There is no feedback to the 5700A.

  • Page 78: How The 5700A And 5725A Communicate

    5700A to determine if the 5700A/5725A cable is connected and if the 5725A is turned on. Returns a low to the 5700A if above is true. A pull-up resistor on the 5700A leaves this line high if the interconnect cable is open or if the 5725A is turned off.

  • Page 79: Description Of The In-Guard Lines

    Analog line that carries the current high output from the 5700A. When the user sets the current output location to "5725A" in a 5700A menu, this signal is routed to the 5725A binding posts. Under this operating condition, all 5700A/5725A current ranges are available from the same binding posts.

  • Page 80: Functional Summaries By Assembly

    If B-FEEDBACK is out of tolerance during 5725A ac voltage or current operation but no other faults are reported, the 5700A sends a message to the 5725A asking for a sequenced shutdown into standby, and displays a fault message on its Control Display.

  • Page 81: Detailed Circuit Description

    (Section 9) while reading theory for each assembly. 4-15. Interconnect Assembly (A1) 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 other assemblies and the fan. There are...

  • Page 82: Power Supply Assembly (A4)

    Instruction Manual 4-16. Power Supply Assembly (A4) The Power Supply assembly (A4) provides regulated system supplies for all 5725A assemblies except as noted below, as well as unregulated fan supply and high voltage supplies for the High Voltage Amplifier. The assembly also includes microprocessor- controlled switching and an independent current-limit circuit.

  • Page 83: High Voltage Supply Section

    Surge arrestor E302 fires if the secondary voltage of the +400V supply exceeds 600V. This should only occur if the 5725A is plugged into an ac line voltage of 200V or more when it is set to 100-120V. E302 would then draw enough current to blow the main fuse, thereby protecting the 5725A.

  • Page 84: Switching Section

    5725A Instruction Manual 4-18. Switching Section MOSFETs Q301/Q317 and Q302/Q318 (each in parallel) are series-switch elements for the +400V supply. Similarly, Q312/Q319 and Q313/Q320 are series-switch elements for the -400V supply. Resistor pairs R301/R302 and R342/R343 equalize the voltage across the transistors in their "off"...

  • Page 85: Current-Limit Section

    4-19. Current-Limit Section Resistors R313 and R329 are current shunts for the high voltage supplies. These are connected in series with the bridge rectifiers, with the common point between the shunts being the high voltage supply common, HVCOM. The voltage developed across the +400V shunt is negative;...

  • Page 86: Fan Supply Section

    CPU. Digital circuitry resides on three assemblies within the 5725A: the Digital assembly (A5), the High Voltage Sense assembly (A6), and the Current Amplifier assembly (A2). All the 5725A hardware, including digital, is in-guard, except for the guard crossing and the CABLEOFF detection circuit.

  • Page 87: Digital Assembly Block Diagram

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

  • Page 88: Eerom

    (A6). Serial communication to and from this guard crossing uses the RECEIVE and TRANSMIT lines, respectively. When the 5725A is not being used, all cable inputs into the 5700A are tied to the 5700A guard to shunt noise currents away.

  • Page 89: Break-Detect Circuitry

    5725A interface cable. There are no user input terminals. Output current is available at binding posts on the 5725A front or rear panel. Selection of front or rear 5725A binding posts is done by unplugging one cable and plugging in another cable on the Current Amplifier assembly inside the 5725A chassis.

  • Page 90: Current Amplifier Assembly Block Diagram

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

  • Page 91: Error Amplifier Section

    The error amplifier section contains three differential amplifiers and a precision high-current shunt resistor. Two differential amplifiers set the gain and uncorrected frequency response of the current amplifier. The remaining differential amplifier is used during the internal portion of 5700A/5725A calibration and during ac current operation. Output Section...

  • Page 92: Output Stage Section

    (ICAL, TP208) with the same amplitude and polarity as the current amplifier input voltage. The calibration amplifier output is measured by circuitry within the 5700A during calibration of the 5725A current amplifier. The calibration amplifier output is fed back to the 5700A Oscillator during ac current operation.

  • Page 93: Control And Switching Section

    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.

  • Page 94: High Voltage Amplifier (A3)

    "Signal Transformers" further on. The High Voltage Amplifier assembly uses the 400V supplies from the Power Supply assembly. Lethal voltage appears on the heat sink assemblies. Do not open the 5725A cover without referring to the access procedures and warnings in Section 6.

  • Page 95: High Voltage Amplifier Assembly Block Diagram

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

  • Page 96: Integrator

    5725A Instruction Manual 4-42. Integrator Op amp U601A is configured as an integrator to reduce the output offset of the input amplifier circuit. This integrator senses the output voltage of the amplifier (MVOUT) through R604 and R605 and forces it to be zero with respect to HVCOMM.

  • Page 97: Transconductance And Cascode Stage

    4-45. Transconductance and Cascode Stage The output voltage of the input amplifier U602, LVAMP, is transformed into a current by Q602. The nominal current is about 8.5 mA. This implies that the nominal output voltage of the input amplifier is about 6V; 15V - (.0085 * 1000) - .6 = 5.9V. The current is passed through a cascode FET Q661, which can stand off the voltage required, about 400V.

  • Page 98: Autobias Current Source

    (electrically conductive as well) to minimize thermal resistance to the heat sink. This means that the heat sinks can have 400V on them during normal operation. Do not open the 5725A cover without referring to the access procedures and warnings in Section 6.

  • Page 99: High Voltage Amplifier Feedback

    Op amp U606B senses the -400V supply and forces the autobias to the minimum bias condition when the 400V supplies are turned off. Transistor Q606 forces the minimum bias condition when the window comparator is activated. 4-51. High Voltage Amplifier Feedback Feedback for the High Voltage Amplifier is provided by R606, R607, and R608 from the output signal MVOUT.

  • Page 100: High Voltage Sense Assembly (A6)

    Sense Amplifier Section The sense amplifier section consists of a precision ac amplifier configured as an active attenuator, a buffer amplifier that isolates the 5725A high quality ground from the 5700A ground reference, and a precision true rms converter circuit for 5725A calibration.

  • Page 101: High Voltage Sense Assembly Block Diagram

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

  • Page 102: Sense Amplifier Section

    The serial interface/guard crossing section consists of an RS-232 interface integrated circuit that provides the hardware for 5700A/5725A communication within the 5725A. Two optoisolators provide the serial guard crossing to the Digital assembly (A5), and two more provide integrity checks for the interface. A relay remotely powered by the 5700A provides a software independent path to guarantee 5725A shutdown if the 5700A/5725A cable is disconnected.

  • Page 103: High-Quality Reference Name Destination

    Op amp U103 forms a simple low offset voltage, low input current buffer to isolate the B-SENSE LO line from the rest of the 5725A circuitry. B-SENSE LO is the reference sense signal from the load provided through the 5700A and 5700A/5725A cable.

  • Page 104: Analog Monitor Section

    5725A Instruction Manual latch up by eliminating positive feedback resulting from positive output voltages from U100. Op amp U105 is simply a low-noise inverting amplifier that scales the sensor output to 10 dB below the 5700A Oscillator output level. The output of the calibration circuit, AC/AC, goes to the 5700A during calibration through the analog monitor section.

  • Page 105: Serial Interface/Guard Crossing Section

    5725A Digital assembly (A5), where it is acted on by the microprocessor. 4-57. Serial Interface/Guard Crossing Section The control link between the 5700A and the 5725A consists of a serial interface at the hardware level. Serial data signals arrive via B-RCV and leave via B-XMIT. These are translated to and from standard 5V logic levels by U160, an RS-232 interface chip that runs from a single 5V supply.

  • Page 106: Control Section

    Supply and Digital assemblies. Comparator U150A provides level shifting of the output of the latch U158 so that the JFET switch Q104 can be controlled. Switch SW150 is simply a contact closure that indicates to the processor whether 5725A calibration is enabled. 4-36...

  • Page 107: Ac Line Voltage Selection Section

    4-60. AC Line Voltage Selection Section In addition to the primary power switch, S401, this section contains three line-voltage selection switches, S402 through S404. These three switches allow the 5725A to be set to eight nominal ac line voltage levels, each with a 10% tolerance.
  • Page 108 5725A Instruction Manual 4-38...

  • Page 109: Where To Find Further Information

    Calibration and Verification Title 5-1. Introduction ... 5-3 5-2. Where to Find Further Information... 5-3 Chapter 5 Page...
  • Page 110 5725A Instruction Manual...

  • Page 111: Introduction

    5-1. Introduction The 5725A is calibrated at the factory before shipping. Calibration is traceable to the U.S. National Bureau of Standards. All that is required to maintain traceability is to run 5700A calibration to external standards at the beginning of the calibration cycle and do performance verification every two years.
  • Page 112 5725A Instruction Manual...
  • Page 113 1. MINIMIZE HANDLING 2. KEEP PARTS IN ORIGINAL CONTAINERS UNTIL READY FOR USE. A Message From Fluke Corporation Some semiconductors and custom IC's can be damaged by electrostatic discharge during handling. This notice explains how you can minimize the chances of destroying such devices 1.
  • Page 114 5. USE STATIC SHIELDING CONTAINERS FOR HANDLING AND TRANSPORT. 6. DO NOT SLIDE S.S. DEVICES OVER ANY SURFACE. 7. AVOID PLASTIC,VINYL AND STYROFOAM IN WORK AREA. PORTIONS REPRINTED WITH PERMISSION FROM TEKTRONIX INC. AND GERNER DYNAMICS, POMONA DIV. Dow Chemical 8.

  • Page 115: Maintenance

    Title 6-1. Introduction ... 6-3 6-2. Replacing the Fuse ... 6-3 6-3. Cleaning the Air Filter... 6-4 6-4. General Cleaning... 6-5 6-5. Cleaning PCA’s... 6-5 6-6. Access Procedures... 6-6 6-7. Initial Access Procedure ... 6-7 6-8. Accessing the Power Supply Assembly (A4) ... 6-9 6-9.
  • Page 116 5725A Instruction Manual...

  • Page 117: Introduction

    200-240V. A spare 4A, 250V fuse is shipped with the 5725A to ensure that one is available for use on the 200 to 240V range. The line power fuse is accessible on the rear panel. The fuse rating label to the right of the fuse holder (labeled FUSE) shows the correct replacement fuse rating for each line voltage setting.

  • Page 118: Cleaning The Air Filter

    S2 S3 S4 200V 220V F4A 250V (FAST) 230V 240V Figure 6-1. Accessing the Fuse Caution JOHN FLUKE MFG. CO., INC. MADE IN U.S.A. PATENTS PENDING CURRENT NO INTERNAL USER SERVICEABLE OUTPUT PARTS REFER SERVICE TO QUALIFIED SERVICE PERSONNEL TO CLEAN FILTER...

  • Page 119: General Cleaning

    Figure 6-2. Accessing the Air Filter 6-4. General Cleaning To keep the 5725A looking like new, clean the case, front panel, and rear panel using a soft cloth slightly dampened with water or a non-abrasive mild cleaning solution that does not harm plastics.

  • Page 120: Access Procedures

    Instruction Manual 6-6. Access Procedures Figure 6-3 shows the location of all major modules in the 5725A. View A is a top view, and view B is a bottom view. Both views show the covers removed. The 5725A is constructed so that two modules are completely accessible from the top, and two modules are completely accessible from the bottom.

  • Page 121: Initial Access Procedure

    5725A. If you work on a 5725A with the power cord attached, and/or you are not certain the high voltage has not bled off, do not wear a grounded wrist strap.

  • Page 122: Initial Access Procedure

    5725A Instruction Manual CR318 6. Verify that both LEDs CR317 and CR318 on the Power Supply assembly (A4) are off. If either is lit after three minutes, there is a fault in the high voltage capacitor bleed-off path. Do not rely on an off condition as an indication that dangerous voltage no longer exists on the filter capacitors.

  • Page 123: Accessing The Power Supply Assembly (A4)

    When reinstalling assemblies, lower them in place squarely to make sure their connectors seat correctly in the Interconnect assembly 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 loops, and place the assembly in the service position.

  • Page 124: Accessing The Digital Assembly

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

  • Page 125: Accessing The Current Amplifier Assembly (A2)

    3. Remove the bottom cover by removing the six screws on the bottom surface. 4. Remove the two screws labeled _A and _B and turn the 5725A over again. 5. Remove the five retaining screws on the Current Amplifier assembly. Lift the Current Amplifier assembly by pulling on the plastic wire-tie loops, and place the assembly in the service position.

  • Page 126: Correct Way To Dress Cables

    5725A Instruction Manual BRIDGE RECTIFIER HEAT SINK DRESS CABLES AS SHOWN 6-11. Accessing the High Voltage Amplifier (A3) The High Voltage Amplifier assembly lays flat on the top of the instrument, toward the front. To access the High Voltage Amplifier assembly, simply do the Initial Access Procedure.

  • Page 127: Accessing The High Voltage Sense Assembly (A6)

    When reinstalling assemblies, lower them in place squarely to make sure their connectors seat correctly in the Interconnect assembly connectors. 4. Turn over the 5725A so that the bottom is facing up. 5. Remove the bottom cover by removing the six screws on the bottom surface.

  • Page 128: Accessing The High Voltage Output Transistors

    (A2) assemblies by first placing each in the service position, then disconnecting all cables attached to each of them. 3. Turn over the 5725A so that the bottom is facing up. 4. Remove the bottom cover by removing the six screws on the bottom surface.

  • Page 129: Enabling Front Or Rear Binding Posts

    6-15. Enabling Front or Rear Binding Posts The 5725A comes from the factory configured for front or rear current output as requested by the purchaser when the system was ordered. Only one output location can be enabled at a time.

  • Page 130: Enabling Front Or Rear Binding Posts

    5725A Instruction Manual CURRENT AMPLIFIER (A2) Make sure that the unused 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.

  • Page 131: Troubleshooting

    Title 7-1. Introduction ... 7-3 7-2. 5725A Fault Codes... 7-3 7-3. Self Diagnostics... 7-3 7-4. Manual Tests for Fault 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.
  • Page 132 5725A Instruction Manual...

  • Page 133: Introduction

    This section provides troubleshooting information in three parts. First a listing of all 5725A fault codes is provided for reference in Table 7-1. Following that is a description of 5725A automated self-diagnostics that you run from the 5700A. Finally, some manual tests are provided that can help you isolate a fault.

  • Page 134: A Fault Codes

    Output Tripped To Standby 5725 -400V Supply Current Too High Output Tripped To Standby 5725 Fan Not Working 5725 CLAMPS Fault Output Tripped To Standby Table 7-1. 5725A Fault Codes MESSAGE Requires service Requires service Requires service Requires service Requires service...
  • Page 135 5725A Current Shunt: Checks the current cabling and the calibration amplifier on the Current Amplifier assembly (A2). b. 5725A Current Zero: Grounds the input and shorts the output of the Current Amplifier, and verifies that the output is close to 0A.

  • Page 136: Manual Tests For Fault Isolation

    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 the power cord attached, and/or you are not certain the high voltage has not bled off, do not wear a grounded wrist strap.

  • Page 137: Problems 1 Or 2: Fault At Power-Up Or When Entering Voltage Standby

    7-5. Problems 1 or 2: Fault at Power-Up or When Entering Voltage Standby Proceed as follows to isolate the problem in these conditions: 1. If the 5700A is reporting a fault, determine if it is an analog monitor fault from Table 7-2.

  • Page 138: Problem 3: Fault When Entering Voltage Operate

    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 the power cord attached, and/or you are not certain the high voltage has not bled off, do not wear a grounded wrist strap.

  • Page 139: Testing The Power Supply By Itself

    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 the power cord attached, and/or you are not certain the high voltage has not bled off, do not wear a grounded wrist strap.
  • Page 140 5725A Instruction Manual 7-10...
  • Page 141 List of Replaceable Parts Title 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 ... 8-3 8-6. Parts Lists... 8-4 Chapter 8 Page...
  • Page 142 5725A Instruction Manual...

  • Page 143: List Of Replaceable Parts

    Electrical components may be ordered directly from the manufacturer by using the manufacturers part number, or from the Fluke Corporation and its authorized representatives by using the part number under the heading FLUKE STOCK NO. In the U.S., order directly from the Fluke Parts Dept. by calling 1-800-526-4731. Parts price information is available from the Fluke Corporation or its representatives.

  • Page 144: Parts Lists

    This instrument may contain a Nickel-Cadmium battery. Do not mix with the sold waste stream. Spent batteries should be disposed of by a qualified recycler or hazardous materials handler. Contact your authorized Fluke service center for recycling information. Ref or Option No.
  • Page 145 COVER, BOTTOM MP605 DIVIDER, HIGH VOLTAGE MODULE MP606 TOP INSULATOR ASSY, HIGH VOLTAGE MODULE MP607 BOTTOM INSULATOR ASSY, HIGH VOLTAGE MODULE Table 8-2. Final Assembly (cont) Fluke Stock Description List of Replaceable Parts Parts Lists Tot Qty Notes 376822 853622...
  • Page 146 Instruction Manual Reference Designator 5725 INSTRUCTION MANUAL CORD,LINE,5-15/IEC,3-18AWG,SVT HARNESS, TRANSISTOR P661 HARNESS, TRANSISTOR P662 HARNESS, TRANSISTOR P663 HARNESS, TRANSISTOR P664 CABLE ASSY, 5700A/5725A I/F XF501 HLDR,FUSE,1/4 X 1-1/4,LOPROFIL Table 8-2. Final Assembly (cont) Fluke Stock Description Tot Qty Notes 823435...

  • Page 147: Final Assembly

    List of Replaceable Parts Parts Lists aq24f.tif Figure 8-1. Final Assembly...
  • Page 148 5725A Instruction Manual aq25f.tif Figure 8-1. Final Assembly (cont)
  • Page 149 List of Replaceable Parts Parts Lists aq26f.tif Figure 8-1. Final Assembly (cont)
  • Page 150 5725A Instruction Manual aq27f.tif Figure 8-1. Final Assembly (cont) 8-10...
  • Page 151 List of Replaceable Parts Parts Lists aq28f.tif Figure 8-1. Final Assembly (cont) 8-11...
  • Page 152 5725A Instruction Manual aq29f.tif Figure 8-1. Final Assembly (cont) 8-12...
  • Page 153 List of Replaceable Parts Parts Lists aq30f.tif Figure 8-1. Final Assembly (cont) 8-13...
  • Page 154 5725A Instruction Manual aq31f.tif Figure 8-1. Final Assembly (cont) 8-14...

  • Page 155: A1 Interconnect Pca

    K13-15 RELAY,REED,1 FORM A,5VDC BRACKET,RIGHT ANGLE,TAPPED,BRA GUIDE, HEATSINK P102 CONN,DIN41612,TYPE R,RT ANG,64 P202,P351,P653 CONN,DIN41612,TYPE 1/2R,RT ANG TP1,TP2 JUMPER,WIRE,NONINSUL,0.200CTR Table 8-3. A1 Interconnect PCA Fluke Stock Description List of Replaceable Parts Parts Lists Tot Qty Notes 203323 838458 103606 836577 446724...

  • Page 156: A1 Interconnect Pca

    5725A Instruction Manual 5725A-1611 aq36f.eps Figure 8-2. A1 Interconnect PCA 8-16...

  • Page 157: A2 Current Amplifier Pca

    J205 HEADER,1 ROW,.100CTR,2 PIN J222 CONN,MATE-N-LOK,HEADER,4 PIN J252 CONN,COAX,SMB(M),PWB K201,K205-209 RELAY,ARMATURE,2 FORM C,5V K202-204 RELAY,ARMATURE,2 FORM A,5VDC L201 CHOKE, 3 TURN Fluke Stock Description List of Replaceable Parts Parts Lists Tot Qty Notes 817056 817056 817056 649913 649913 720938 697409...
  • Page 158 5725A Instruction Manual Reference Designator INSULATOR, CURRENT MP28 INSULATOR, CURRENT MP38 BUMPER, HI-TEMP, SILICONE MP81 CLAMP,PWB MOUNTING MP82 CLAMP,PWB MOUNTING MP203 HEAT DIS,PRESS ON,TO-5 MP205 HEAT DIS,VERT,.83,.50,.395,TO- MP206 HEAT DIS,ACC,AL FOIL,TO-3 MP211 FUSE CLIP PCB MP215 SOCKET,SINGLE,PWB,FOR .042-.04 MP225 AIDE,PCB PULL...
  • Page 159 U210 IC,COMPARATOR,QUAD,14 PIN DIP U211 IC,OP AMP,QUAD,JFET INPUT,14 P VR201,VR202 ZENER,UNCOMP,6.8V,5%,20.0MA,0. HARNESS, MFC CURRENT w206 ASSY, THERMISTOR Z201,Z203 RNET,MF,HERM,SIP,5700 LO V INS Fluke Stock Description List of Replaceable Parts Parts Lists Tot Qty Notes 235226 235226 348920 289975 168260 168260...

  • Page 160: A2 Current Amplifier Pca

    5725A Instruction Manual 5725A-1650 aq37f.eps Figure 8-3. A2 Current Amplifier PCA 8-20...

  • Page 161: A3 High Voltage Amplifier Pca

    CHOKE, 3 TURN L603 INDUCTOR,2.2UH,+-5%,108MHZ,SHL MP28 INSULATOR,PWR SUPPY HIGH VOLT MP81 CLAMP,PWB MOUNTING MP82 CLAMP,PWB MOUNTING MP601 AIDE,PCB PULL MP658 INSUL PT,TRANSISTOR MOUNT,DAP, Fluke Stock Description List of Replaceable Parts Parts Lists Tot Qty Notes 733089 831495 816843 816843 836346 817023 817023...
  • Page 162 5725A Instruction Manual Reference Designator Q601 TRANSISTOR,SI,N-JFET,TO-92 Q602,Q603,Q606 TRANSISTOR,SI,PNP,40V,0.35W,TO Q604 TRANSISTOR,SI,N-DMOS FET,TO-72 Q605,Q660 TRANSISTOR,SI,NPN,SMALL SIGNAL Q653, Q654, Q661 HEAT SINK ASSY Q667, Q670 HEAT SINK ASSY Q657 HEAT SINK ASSY Q662, Q665 HEAT SINK ASSY Q658,Q666 TRANSISTOR,SI,NPN,SMALL SIGNAL Q659 TRANSISTOR,SI,PNP,SMALL SIGNAL R600 RES,WW,1.2,+-5%,2W...
  • Page 163 ISOLATOR,OPTO,LED TO PHOTO-RES U606 IC,COMPARATOR,DUAL,LO-PWR,8 PI VR601 ZENER,UNCOMP,24.0V,5%,5.2MA,0. VR602,VR658 ZENER,UNCOMP,6.8V,5%,20.0MA,0. VR603,VR666 ZENER,UNCOMP,5.1V,5%,20.0MA,0. VR651,VR665 ZENER,UNCOMP,15.0V,5%,8.5MA,0. VR652- ZENER,UNCOMP,10.0V,5%,12.5MA,0 657,VR659-662 VR663,VR664 ZENER,UNCOMP,20.0V,5%,12.5MA,1 Fluke Stock Description List of Replaceable Parts Parts Lists Tot Qty Notes 348920 168260 543355 291872 109462 820811 820811 687852 687852 687852...

  • Page 164: A3 High Voltage Amplifier Pca

    5725A Instruction Manual 5725A-1661 aq38f.eps Figure 8-4. A3 High Voltage Amplifier PCA 8-24...

  • Page 165: A4 Power Supply Pca

    CONN,DIN41612,TYPE 1/2R,32 PIN MP28 INSULATOR,PWR SUPPY HIGH VOLT MP81 CLAMP,PWB MOUNTING MP82 CLAMP,PWB MOUNTING MP301 HLDR,FUSE,13/32,PWB MT Table 8-6. A4 Power Supply PCA Fluke Stock Description List of Replaceable Parts Parts Lists Tot Qty Notes 854075 854075 649913 649913 649913...
  • Page 166 5725A Instruction Manual Reference Designator MP310 AIDE,PCB PULL MP350 HEAT DIS,VERT,1.13X1.90X0.95,T MP398 PAD, ADHESIVE P301 JUMPER,REC,2 POS,.100CTR,.025 Q301,Q302,Q317, HEAT SINK ASSY Q318 Q303-305,Q315, TRANSISTOR,SI,NPN,HI-VOLTAGE,T Q321,Q322 Q306,Q307,Q311, TRANSISTOR,SI,PNP,SM SIG,SELEC Q316,Q323,Q324 Q308 TRANSISTOR,SI,PNP,40V,0.35W,TO Q309 TRANS,SI,N-JFET,REMOTE CUTOFF, Q310,Q314 TRANSISTOR,SI,NPN,SMALL SIGNAL Q312,Q313,Q319, HEAT SINK ASSY...
  • Page 167 U354 IC,OP AMP,GENERAL PURPOSE,8 PI VR301,VR302, ZENER,UNCOMP,15.0V,5%,8.5MA,0. VR304,VR305 VR303 ZENER,UNCOMP,16.0V,5%,7.8MA,0. VR306,VR307 ZENER,UNCOMP,3.9V,10%,20.0MA,0 VR351 ZENER,UNCOMP,3.9V,5%,320.0MA,5 VR352 ZENER,UNCOMP,24.0V,5%,5.2MA,0. HARNESS, HIGH VOLTAGE SUPPLY Fluke Stock Description List of Replaceable Parts Parts Lists Tot Qty Notes 343426 348821 441584 838144 838136 782656 816090 816090...

  • Page 168: A4 Power Supply Pca

    5725A Instruction Manual 5725A-1631 aq39f.eps Figure 8-5. A4 Power Supply PCA 8-28...

  • Page 169: A5 Digital Pca

    IL,CMOS,QUAD 2 INPUT AND GATE U515 EPROM,PROGRAMED 27128A-150 U51 Y501 CRYSTAL,4.9152 MHZ,+/- 0.005%, Z501 RES,CERM,DIP,16 PIN,15 RES,10K Z502 RES,CERM,DIP,16 PIN,8 RES,24,+ Table 8-7. A5 Digital PCA Fluke Stock Description List of Replaceable Parts Parts Lists Tot Qty Notes 649913 649913 649913 817056...

  • Page 170: A5 Digital Pca

    5725A Instruction Manual 5725A-1650 aq40f.eps Figure 8-6. A5 Digital PCA 8-30...

  • Page 171: A6 High Voltage Sense Pca

    RIVET,POP,DOME,AL,.125,.316 H126 LABEL,C-MOS INSTRUCTION J102 CONN,DIN41612,TYPE R,64 PIN J118-124 SOCKET,SINGLE,SOLDER,FOR .021 J152 CONN,COAX,SMB(M),PWB J401 CONN,MATE-N-LOK,HEADER,4 PIN J402 HEADER,1 ROW,.156CTR,12 PIN Fluke Stock Description List of Replaceable Parts Parts Lists Tot Qty Notes 733071 271619 649913 649913 649913 649913 649913 649913...
  • Page 172 5725A Instruction Manual Reference Designator J403 HEADER,1 ROW,.156CTR,RT ANG,5 K101,K106-108, RELAY,ARMATURE,2 FORM C,5V K111,K151-153 K102-105,K109 RELAY,REED,1 FORM A,5VDC K401 RELAY,ARMATURE,2 FORM A,5VDC L100-105 CHOKE, 3 TURN CABLE ACCESS,TIE,4.00L,.10W,.7 MP25 SHIELD, DIGITAL MP26 SHIELD, SENSOR MP27 INSULATOR, SENSE MP36 SUPPORT,ATTENUATOR MP038...
  • Page 173 VR151 ZENER,UNCOMP,5.1V,5%,20.0MA,0. W002 CABLE,HIGH VOLTAGE OUTPUT W006 HARNESS,MFC CURRENT W009 HARNESS, SUB D Z100 RNET,MF,HERM,SIP,5700 HI V AMP Z150 RES,CERM,DIP,16 PIN,8 RES,1M,+ Fluke Stock Description List of Replaceable Parts Parts Lists Tot Qty Notes 810564 851340 810416 810416 697102 746172...

  • Page 174: A6 High Voltage Sense Pca

    5725A Instruction Manual 5725A-1601 aq41f.eps Figure 8-7. A6 High Voltage Sense PCA 8-34...

  • Page 175: A12 Transformer Enclosure Assembly

    LOW FREQ XFORMER MED FREQUENCY HIGH FREQ T101 POWER TRANSFORMER TB001 TERM STRIP,BULKHEAD,.375CTR,2 HARNESS, CURRENT, FRONT HARNESS,CURRENT,REAR CABLE, TRANSFORMER BLACK CABLE, TRANSFORMER WHITE Fluke Stock Description List of Replaceable Parts Parts Lists Tot Qty Notes 320093 772236 152181 149567 320051...

  • Page 176: A12 Transformer Enclosure Assembly

    5725A Instruction Manual aq32f.tif Figure 8-8. A12 Transformer Enclosure Assembly 8-36...
  • Page 177 List of Replaceable Parts Parts Lists aq33f.tif Figure 8-8. A12 Transformer Enclosure Assembly (cont) 8-37...
  • Page 178 5725A Instruction Manual aq34f.tif Figure 8-8. A12 Transformer Enclosure Assembly (cont) 8-38...
  • Page 179 List of Replaceable Parts Parts Lists aq35f.tif Figure 8-8. A12 Transformer Enclosure Assembly (cont) 8-39...
  • Page 180 5725A Instruction Manual Reference Designator CONN,MATE-N-LOK,HEADER,4 PIN L1,L2 CHOKE HARNESS, LINE VOLTAGE 1. For schematic, See A6 section 9. 8-40 Table 8-10. A30 Inductor PCA Fluke Stock Description Figure 8-9. A30 Inductor PCA Tot Qty Notes 512269 490888 843011 5725A-1603...

  • Page 181: Schematic Diagrams

    Figure No. 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 9-7.
  • Page 182 5725A Instruction Manual...
  • Page 183 Schematic Diagrams aq48f.eps 5725A-1611 Figure 9-1. A1 Interconnect PCA...
  • Page 184 5725A Instruction Manual Figure 9-1. A1 Interconnect PCA (cont)
  • Page 185 Schematic Diagrams Figure 9-1. A1 Interconnect PCA (cont)
  • Page 186 5725A Instruction Manual aq52f.eps 5725A-1650 Figure 9-2. A2 Current Amplifier PCA...
  • Page 187 Schematic Diagrams Figure 9-2. A2 Current Amplifier PCA (cont)
  • Page 188 5725A Instruction Manual Figure 9-2. A2 Current Amplifier PCA (cont)
  • Page 189 Schematic Diagrams Figure 9-2. A2 Current Amplifier PCA (cont)
  • Page 190 5725A Instruction Manual Figure 9-3. A3 High Voltage Amplifier PCA 9-10 aq56f.eps 5725A-1661...
  • Page 191 Schematic Diagrams Figure 9-3. A3 High Voltage Amplifier PCA (cont) 9-11...
  • Page 192 5725A Instruction Manual Figure 9-3. A3 High Voltage Amplifier PCA (cont) 9-12...
  • Page 193 Schematic Diagrams aq59f.eps 5725A-1631 Figure 9-4. A4 Power Supply PCA 9-13...
  • Page 194 5725A Instruction Manual Figure 9-4. A4 Power Supply PCA (cont) 9-14...
  • Page 195 Schematic Diagrams Figure 9-4. A4 Power Supply PCA (cont) 9-15...
  • Page 196 5725A Instruction Manual TYPICAL COMMUNICATIONS ACTIVITY AT PINS 12 AND 13 OF U507. aq43f.eps 10 ms 9-16 aq62f.eps 5725A-1650 Figure 9-5. A5 Digital PCA...
  • Page 197 Schematic Diagrams Figure 9-5. A5 Digital PCA (cont) 9-17...
  • Page 198 STANDBY 10 ms 5725A Instruction Manual VOLTAGE STANDBY CURRENT STANDBY 10 ms 10 ms Figure 9-6. A6 High Voltage Sense PCA 9-18 aq63f.eps 5725A-1601 aq44f.eps...
  • Page 199 Schematic Diagrams Figure 9-6. A6 High Voltage Sense PCA (cont) 9-19...
  • Page 200 5725A Instruction Manual Figure 9-6. A6 High Voltage Sense PCA (cont) 9-20...
  • Page 201 Schematic Diagrams Figure 9-6. A6 High Voltage Sense PCA (cont) 9-21...
  • Page 202 5725A Instruction Manual Figure 9-6. A6 High Voltage Sense PCA (cont) 9-22...
  • Page 203 Schematic Diagrams aq45f.eps Figure 9-7. A12 Transformer Enclosure Assembly 9-23...
  • Page 204 5725A Instruction Manual 9-24...
  • Page 205 High Voltage Sense assembly (A6), 6-13 Initial access procedure, 6-7 Interconnect assembly (A1), 6-14 Power Supply assembly (A4), 6-9 Activating 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...
  • Page 206 5725A Instruction Manual PCAs, 6-5 Clearance requirements, 2-5 Communication, 5700A and 5725A, 4-8 Connectors, (also see binding posts, Terminals), 3-5 5700A CALIBRATOR, 2-6, 3-7 Line power, 3-7 Controls. See switches Cooling considerations, 2-5 Cord, line power, 2-4, 2-9 Current Output, 3-5, 3-7...
  • Page 207 Fault when entering current operate, 7-8 Fault when entering current standby, 7-8 Fault when entering voltage operate, 7-8 Fault when entering voltage standby, 7-7 Turning on the 5725A, 3-8 —U— Unpacking and inspection, 2-3 —V— Ventilation, clearance needed for, 2-5...
  • Page 208 5725A Instruction Manual...

Table of Contents