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 3: Table Of Contents
Operating Notes ................. 3-1 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 Voltage Standby................3-10 3-9.
Page 4 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 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...
Page 7 List of Tables Table Title Page 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. Internal Fuse Data....................4-13 4-2. Signal Transformer Usage ..................4-29 4-3.
Page 8 5725A Instruction Manual...
Page 9 List of Figures Figure Title Page 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 SUMMANY 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 FIRST AID FOR ELECTRIC SHOCK 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 Instruction Manual ............... 1-5 1-5. 5700A Operator Manual ..............1-5 1-6. 5700A Operator Reference Guide ........... 1-5 1-7. 5700A Remote Programming Reference Guide....... 1-5 1-8.
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
Where to Go From Here 1-2. This manual is the operator and service manual for the 5725A. However, because the 5725A operates under the control of the 5700A Calibrator, most operating instructions for the 5725A are in the 5700A manuals. Topics such as selecting output values, connecting to a UUT (Unit Under Test), and self calibration are covered in the 5700A Operator Manual.
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 Operator Manual contains most of the information you need to operate the 5725A.
Page 22: 5700A Service Manual
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 Introduction and Specifications Specifications DC Voltage Absolute Uncertainty Relative Uncertainty ± 5°C from calibration temperature ± 1°C Range Resolution 24 Hours 90 Days 180 Days 1 Year 24 Hours 90 Days ± (ppm output + µV) ± (ppm output + µV) 220 mV 10 nV 6.5 + .75...
Page 24 50-1k 75 + 4 80 + 4 85 + 4 90 + 4 50 + 4 55 + 4 5725A Amplifier: 40-1k 75 + 4 80 + 4 85 + 4 90 + 4 50 + 4 55 + 4...
Page 25 Introduction and Specifications Specifications AC Voltage (continued) Secondary Performance Specifications and Operating Characteristics Included in Uncertainty Specifications Temperature Maximum Stability Coefficient Distortion ± 1°C Range Frequency 0°-10°C Output Impedance Bandwidth 10°-40°C 24 Hours 10 Hz-10 MHz 40°-50°C ± µV ±µV/°C Ω...
Page 26 Overshoot: <10% added. Common mode rejection: 140 dB, DC to 400 Hz 2. The 5725A will drive up to 1000 pF of load capacitance. Uncertainty Frequency: specifications include loads to 300 pF and 150 pF as shown under Ranges (Hz): "Load Limits."...
Page 27 Introduction and Specifications Specifications Resistance Absolute Uncertainty of Characterized Value Relative Uncertainty ±5°C from calibration temperature [Note 1] ±1°C Nominal Value 24 Hours 90 Days 180 Days 1 Year 24 Hours 90 Days ±ppm ±ppm Ω 50 µΩ 50 µΩ 50 µΩ...
Page 28 5725A Instruction Manual Current Derating Factors Nominal Value Value of Derating Factor K for Over or Under Current Two-Wire Comp Four-Wire Four-Wire Ω I<I I<I <I<I (Note 1) (Note 1) (Note 2)  SHORT 4 X 10 1.5 X 10 1.6 X 10...
Page 29 0.1 x actual load maximum load for full accuracy 5. 5700A compliance limit is 2V for outputs from 1A to 2.2A. 5725A Amplifier may be used in range-lock mode down to 0A. Minimum output: 0 for all ranges, including 5725A.
Page 30 .85% + 200 5k-10k .80% + 200 .90% + 200 .95% + 200 1.0% + 200 .75% + 200 5725A Amplifier: 40-1k 370 + 170 400 + 170 440 + 170 460 + 170 300 + 170 330 + 170 100 µA...
Page 31 Power factors: 5700A, 0.9 to 1; 5725A, 0.1 to 1. Subject to compliance voltage limits. Frequency: Range (Hz): 10.000-11.999, 12.00-119.99, 120.0-1199.9, 1.200k-10.000k Uncertainty: ±0.01% Resolution: 11,999 counts Settling time to full accuracy: 5 seconds for 5700A ranges; 6 seconds for 5725A 11A range; +1 second for amplitude or frequency range change. Overshoot: <10% 1-15...
Page 32 5725A Instruction Manual Wideband AC Voltage (Option -03) Specifications apply to the end of the cable and 50Ω termination used for calibration: Absolute Uncertainty ±5°C from calibration temperature Range 30 Hz-500 kHz Resolution 24 Hours 90 Days 180 Days 1 Year Volts ±...
Page 33 5700A: 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. Both units project 5.1 cm, (2 in) from rack front.
Page 34 5725A Instruction Manual 1-18...
Page 35: Installation
Chapter 2 Installation Title Page 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 .................
Page 36 5725A Instruction Manual...
Page 37: 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 38 5725A Instruction Manual Table 2-2. Line Power Cord Types Available from Fluke TYPE VOLTAGE/CURRENT FLUKE 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...
Page 39: 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 40: 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 41: 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 42: Accessing The Fuse
200-240V. Note 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 43: 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.
Page 44 5725A Instruction Manual 2-10...
Page 45: Operating Notes
Page 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 46 5725A Instruction Manual...
Page 47: Introduction
5700A Calibrator, operating instructions such as how to call up a specific output value are contained in Section 4 of the 5700A Operator Manual. Operating the 5725A in remote control is covered in Section 5 of the 5700A Operator Manual.
Page 48: Front Panel Features
Front Panel Features 3-2. 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 POWER OVERLOAD CABLE OFF aq6f.eps Figure 3-1. Front Panel Features...
Page 49 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 50: Rear Panel Features
5725A Instruction Manual Rear Panel Features 3-3. Rear panel features are called out in Figure 3-2. Each rear panel feature is briefly described in Table 3-2. JOHN FLUKE MFG. CO., INC. WARNING CAUTION GROUNDING FOR FIRE PROTECTION MADE IN U.S.A.
Page 51 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 52: 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 53: 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: •...
Page 54: 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: •...
Page 55: Current Standby
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 2.2A or above is showing on the 5700A Output Display with the STANDBY annunciator lit.
Page 56: 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: •...
Page 57: 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 58: 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 59: 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 60 5725A Instruction Manual 4-30. Optoisolator Link................. 4-18 4-31. Break-Detect Circuitry..............4-19 4-32. Power Up and Reset Circuitry ............. 4-19 4-33. Watchdog Timer ................4-19 4-34. Current Amplifier Assembly (A2) ........... 4-19 4-35. Error Amplifier Section ............... 4-21 4-36. Output Stage Section ..............4-22 4-37.
Page 61: 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 62 5725A Instruction Manual Figure 4-1. 5725A Overall Block Diagram...
Page 63: 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 64: 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 65: Operation In The 11A Dc Range
2V dc range drives an error amplifier with an input impedance of 40 kΩ. The gain of this amplifier is determined by this 40 kΩ resistor with a 4 kΩ feedback resistor, and the value of the precision shunt. The 5725A uses a 0.02Ω shunt for the 11A function. There is no feedback to the 5700A.
Page 66: 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 67: 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 68: 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 69: Detailed Circuit Description
(Section 9) while reading theory for each assembly. Interconnect 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 other assemblies and the fan. There are...
Page 70: Power Supply Assembly (A4)
Power Supply Assembly (A4) 4-16. 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 71: 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 72: Switching Section
5725A Instruction Manual Switching Section 4-18. 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 73: Current-Limit Section
Theory of Operation Detailed Circuit Description Current-Limit Section 4-19. 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 74: 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 75 Theory of Operation Detailed Circuit Description aq19f.eps Figure 4-2. Digital Assembly Block Diagram 4-17...
Page 76: 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 77: 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 78 5725A Instruction Manual aq20f.eps Figure 4-3. Current Amplifier Assembly Block Diagram 4-20...
Page 79: 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. •...
Page 80: 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 81: 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 82: 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 83 Theory of Operation Detailed Circuit Description aq22f.eps Figure 4-4. High Voltage Amplifier Assembly Block Diagram 4-25...
Page 84: Integrator
5725A Instruction Manual Integrator 4-42. 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 85: Transconductance And Cascode Stage
Theory of Operation Detailed Circuit Description Transconductance and Cascode Stage 4-45. 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;...
Page 86: 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 87: High Voltage Amplifier Feedback
Theory of Operation Detailed Circuit Description 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. High Voltage Amplifier Feedback 4-51.
Page 88: 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 89 Theory of Operation Detailed Circuit Description aq21f.eps Figure 4-5. High Voltage Sense Assembly Block Diagram 4-31...
Page 90: 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 91 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 92: 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 93: Serial Interface/Guard Crossing Section
Serial Interface/Guard Crossing Section 4-57. 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 94: 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 95: Ac Line Voltage Selection Section
4-60. 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 96 5725A Instruction Manual 4-38...
Page 97: Calibration And Verification
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...
Page 99: Introduction
Introduction 5-1. 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 100 5725A Instruction Manual...
Page 101: Maintenance
Chapter 6 Maintenance Title Page 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) ........
Page 102 5725A Instruction Manual...
Page 103: Introduction
200-240V. Note 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 104: Cleaning The Air Filter
5725A Instruction Manual JOHN FLUKE MFG. CO., INC. WARNING CAUTION GROUNDING FOR FIRE PROTECTION MADE IN U.S.A. CONNECTOR IN POWER CORD REPLACE ONLY WITH A 250V FUSE MUST BE CONNECTED TO OF INDICATED RATING. PATENTS PENDING ENSURE PROTECTION FROM CURRENT ELECTRONIC SHOCK.
Page 105: General Cleaning
Figure 6-2. Accessing the Air Filter General Cleaning 6-4. 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 106: Access Procedures
Access Procedures 6-6. 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 107: 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 108 5725A Instruction Manual HIGH VOLTAGE AMPLIFIER (A3) TP307 CR317 TP304 TP301 CR318 FRONT PANEL POWER SUPPLY (A4) aq16f.eps Figure 6-4. Initial Access Procedure 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.
Page 109: 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 110 5725A Instruction Manual CAUTION WHEN REINSTALLING DIGITAL ASSEMBLY, PULL RIBBON CABLE SLACK COMPLETELY INTO CHASSIS. aq17f.eps Figure 6-5. Accessing the Digital Assembly 6-10...
Page 111: 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 112: Accessing The High Voltage Amplifier (A3)
5725A Instruction Manual CURRENT AMPLIFIER (A2) BRIDGE RECTIFIER HEAT SINK DRESS CABLES AS SHOWN aq18f.eps Figure 6-6. Correct Way to Dress Cables Accessing the High Voltage Amplifier (A3) 6-11. The High Voltage Amplifier assembly lays flat on the top of the instrument, toward the rear.
Page 113: 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. 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 114: 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 115: Enabling Front Or Rear Binding Posts
Enabling Front or Rear Binding Posts 6-15. 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. You can reconfigure the output location by opening the chassis, detaching a cable and tying it away, and attaching another cable to a jack on the Current Amplifier assembly.
Page 116 5725A Instruction Manual FRONT OUTPUT CABLE J222 SECURE UNUSED CABLE CURRENT AMPLIFIER (A2) REAR OUTPUT CABLE aq23f.eps Figure 6-7. Enabling Front or Rear Binding Posts Caution 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.
Page 117: Troubleshooting
Chapter 7 Troubleshooting Title Page 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.
Page 118 5725A Instruction Manual...
Page 119: 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 120 5725A Instruction Manual Table 7-1. 5725A Fault Codes FAULT MESSAGE EXPLANATION 5725 Self-Test ROM Failure Requires service 5725 Self-Test RAM Failure Requires service 5725 Self-Test EEPROM Failure Requires service 5725 Self-Test Data Bus Failure Requires service 5725 Self-Test CLAMPS Circuit Failure...
Page 121 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 122: 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 123: Problems 1 Or 2: Fault At Power-Up Or When Entering Voltage Standby
Troubleshooting Manual Tests for Fault Isolation Problems 1 or 2: Fault at Power-Up or When Entering Voltage Standby 7-5. 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 124: 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 125: 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 126 5725A Instruction Manual 7-10...
Page 127: List Of Replaceable Parts
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 Service Centers..................8-4...
Page 128 5725A Instruction Manual...
Page 129: Introduction
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 130: Service Centers
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. Manual Status Information...
Page 131 BINDING POST, STUD, PLATED 102707 MP514 LABEL,VINYL,1.500,.312 844712 5725 INSTRUCTION MANUAL 823435 CORD,LINE,5-15/IEC,3-18AWG,SVT 284174 HARNESS, TRANSISTOR P661 843040 HARNESS, TRANSISTOR P662 843045 HARNESS, TRANSISTOR P663 843052 HARNESS, TRANSISTOR P664 843057 CABLE ASSY, 5700A/5725A I/F 859897 XF501 HLDR,FUSE,1/4 X 1-1/4,LOPROFIL 424416...
Page 132 5725A Instruction Manual aq24f.tif Figure 8-1. Final Assembly...
Page 133 List of Replaceable Parts aq25f.tif Figure 8-1. Final Assembly (cont)
Page 134 5725A Instruction Manual aq26f.tif Figure 8-1. Final Assembly (cont)
Page 135 List of Replaceable Parts aq27f.tif Figure 8-1. Final Assembly (cont)
Page 136 5725A Instruction Manual aq28f.tif Figure 8-1. Final Assembly (cont) 8-10...
Page 137 List of Replaceable Parts aq29f.tif Figure 8-1. Final Assembly (cont) 8-11...
Page 138 5725A Instruction Manual aq30f.tif Figure 8-1. Final Assembly (cont) 8-12...
Page 139 List of Replaceable Parts aq31f.tif Figure 8-1. Final Assembly (cont) 8-13...
Page 140 5725A Instruction Manual Table 8-2. A1 Interconnect PCA Reference Fluke Stock Description Tot Qty Notes Designator CR1,CR13-15 DIODE,SI,BV=75V,IO=150MA,500MW 203323 RIVET,S-TUB,OVAL,AL,.087,.343 838458 RIVET,S-TUB,OVAL,STL,.118,.218 103606 HEADER,2 ROW,.100CTR,34 PIN 836577 HEADER,1 ROW,.156CTR,10 PIN 446724 J100,J103 HEADER,1 ROW,.100CTR,RT ANG,2 851667 RELAY,ARMATURE,2 FORM C,5VDC 810911...
Page 141 List of Replaceable Parts 5725A-1611 aq36f.eps Figure 8-2. A1 Interconnect PCA 8-15...
Page 142 5725A Instruction Manual Table 8-3. A2 Current Amplifier PCA Reference Fluke Stock Description Tot Qty Notes Designator C201,C202,C207, CAP,AL,22UF,+-20%,35V 817056 C208,C211,C212, 817056 C226,C227,C236 817056 C203,C204,C216, CAP,POLYES,0.1UF,+-10%,50V 649913 C217,C238-240 649913 C205,C206 CAP,POLYES,0.001UF,+-10%,50V 720938 C210,C214,C215, CAP,POLYES,0.47UF,+-10%,50V 697409 C234 697409 C213 CAP,CER,22PF,+-2%,50V,C0G 714832...
Page 143 List of Replaceable Parts Table 8-3. A2 Current Amplifier PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator MP28 INSULATOR, CURRENT 880716 MP38 FOOT,RUBBER,ADHES,GRY,.44 DIA, 358341 MP81 CLAMP,PWB MOUNTING 823039 MP82 CLAMP,PWB MOUNTING 842948 MP203 HEAT DIS,PRESS ON,TO-5 418384 MP205 HEAT DIS,VERT,.83,.50,.395,TO-...
Page 144 5725A Instruction Manual Table 8-3. A2 Current Amplifier PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator R233,R237,R238, RES,MF,2K,+-1%,0.125W,100PPM 235226 R273 235226 R243,R244 RES,CF,100K,+-5%,0.25W 348920 R247,R248 RES,MF,232,+-1%,0.125W,100PPM 289975 R253,R277,R282, RES,MF,10K,+-1%,0.125W,100PPM 168260 R283,R285,R286 168260 R255,R267,R268 RES,CF,470K,+-5%,0.25W 342634 R256-259 RES,MF,1M,+-1%,0.125W,100PPM 268797 R260 RES,CC,5.1,+-5%,0.5W...
Page 145 List of Replaceable Parts 5725A-1650 aq37f.eps Figure 8-3. A2 Current Amplifier PCA 8-19...
Page 146 5725A Instruction Manual Table 8-4. A3 High Voltage Amplifier PCA Reference Fluke Stock Description Tot Qty Notes Designator C601 CAP,POLYES,1UF,+-10%,50V 733089 C602 CAP,CER,100PF,+-5%,50V,C0G 831495 C603,C606,C609- CAP,AL,10UF,+-20%,63V,SOLV PRO 816843 611,C620 816843 C604,C605 CAP,CER,1.5PF,+-0.25PF,1000V,C 836346 C607,C614,C654, CAP,CER,22PF,+-10%,1000V,C0G 817023 C662 817023 C608,C612,C619, CAP,POLYES,0.1UF,+-10%,50V...
Page 147 List of Replaceable Parts Table 8-4. A3 High Voltage Amplifier PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator MP668 NUT,HEX,MINI,SS,6-32 110569 MP674 WASHER,FLAT,STL,.149,.375,.031 110270 MP679 SCREW,PH,P,SEMS,STL,6-32,.313 530287 Q601 TRANSISTOR,SI,N-JFET,TO-92 816314 Q602,Q603,Q606 TRANSISTOR,SI,PNP,40V,0.35W,TO 698233 Q604 TRANSISTOR,SI,N-DMOS FET,TO-72 394122 Q605,Q660...
Page 148 5725A Instruction Manual Table 8-4. A3 High Voltage Amplifier PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator R640,R642 RES,CF,100K,+-5%,0.25W 348920 R641,R648 RES,MF,10K,+-1%,0.125W,100PPM 168260 R643 RES,CF,4.7M,+-5%,0.25W 543355 R647 RES,MF,20K,+-1%,0.125W,100PPM 291872 R651 RES,CC,220,+-10%,1W 109462 R654,R661,R684, RES,CC,100K,+-5%,1W 641282 R692 641282 R657,R658,R666, RES,CC,3.9,+-5%,1W...
Page 149 List of Replaceable Parts 5725A-1661 aq38f.eps Figure 8-4. A3 High Voltage Amplifier PCA 8-23...
Page 150 5725A Instruction Manual Table 8-5. A4 Power Supply PCA Reference Fluke Stock Description Tot Qty Notes Designator C301,C302,C321, CAP,AL,220UF,+-20%,350V 854075 C322 854075 C303,C304,C308, CAP,POLYES,0.1UF,+-10%,50V 649913 C317-319,C352, 649913 C355,C358,C360, 649913 C362 649913 C305,C306 CAP,AL,0.47UF,+-20%,50V 769695 C307 CAP,POLYES,0.047UF,+-10%,50V 820548 C309 CAP,CER,82PF,+-2%,50V,C0G 714857 C310,C311,C313, CAP,CER,0.04UF,+-20%,3000V,Y5V...
Page 151 List of Replaceable Parts Table 8-5. A4 Power Supply PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator MP310 AIDE,PCB PULL 541730 MP350 HEAT DIS,VERT,1.13X1.90X0.95,T 830844 MP398 PAD, ADHESIVE 735365 P301 JUMPER,REC,2 POS,.100CTR,.025 530253 Q301,Q302,Q317, TRANSISTOR,SI,P-MOS,POWER,500V 782482 Q318 782482...
Page 152 5725A Instruction Manual Table 8-5. A4 Power Supply PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator R351 RES,CF,1K,+-5%,0.25W 343426 R355 RES,CF,4.7K,+-5%,0.25W 348821 R361,R362 RES,CF,4.7,+-5%,0.25W 441584 RT350 THERMISTOR,DISC,O.12,25C 838144 RT351-354 THERMISTOR,DISC,0.81,25C 838136 SW301,SW302 SWITCH,PUSHBUTTON,SPST,MOMENTA 782656 TP301-307,TP350- JUMPER,WIRE,NONINSUL,0.200CTR 816090 355,TP357-360...
Page 153 List of Replaceable Parts 5725A-1631 aq39f.eps Figure 8-5. A4 Power Supply PCA 8-27...
Page 154 5725A Instruction Manual Table 8-6. A5 Digital PCA Reference Fluke Stock Description Tot Qty Notes Designator C501,C503-511, CAP,POLYES,0.1UF,+-10%,50V 649913 C516,C518,C519, 649913 C521 649913 C502,C520 CAP,AL,22UF,+-20%,35V 817056 C512,C513 CAP,CER,15PF,+-20%,50V,C0G 697524 C514,C517 CAP,POLYES,0.33UF,+-10%,50V 715284 C515 CAP,TA,10UF,+-20%,35V 816512 C522-530 CAP,CER,470PF,+-5%,50V,C0G 830430 C531 CAP,CER,100PF,+-5%,50V,C0G...
Page 155 List of Replaceable Parts 5725A-1650 aq40f.eps Figure 8-6. A5 Digital PCA 8-29...
Page 156 5725A Instruction Manual Table 8-7. A6 High Voltage Sense PCA Reference Fluke Stock Description Tot Qty Notes Designator C100,C121 CAP,POLYCA,1UF,+-10%,50V 271619 C101,C103,C106, CAP,POLYES,0.1UF,+-10%,50V 649913 C107,C109,C111, 649913 C114,C115 C117- 649913 119,C124,C125, 649913 C150-152,C154, 649913 C157,C163,C166, 649913 C167,C169-176, 649913 C181-183 649913 C102 CAP,POLYCA,0.15UF,+-5%,50V...
Page 157 List of Replaceable Parts Table 8-7. A6 High Voltage Sense PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator J403 HEADER,1 ROW,.156CTR,RT ANG,5 844717 K101,K106-108, RELAY,ARMATURE,2 FORM C,5V 733063 K111,K151-153 733063 K102-105,K109 RELAY,REED,1 FORM A,5VDC 806950 K401 RELAY,ARMATURE,2 FORM A,5VDC...
Page 158 5725A Instruction Manual Table 8-7. A6 High Voltage Sense PCA (cont) Reference Fluke Stock Description Tot Qty Notes Designator R154 RES,MF,20K,+-0.1%,0.25W,25PPM 810564 R155 RES,MF,13.7K,+-0.1%,0.125W,25P 851340 R156,R158,R168, RES,CF,3.9K.+-5%,0.25W 810416 R173 810416 R162 RES,CF,10K,+-5%,0.25W 697102 R171 RES,CF,3M,+-5%,0.25W 746172 R172,R175 RES,CF,4.7K,+-5%,0.25W 721571 R178 RES,CF,2K,+-5%,0.25W...
Page 159 List of Replaceable Parts 5725A-1601 aq41f.eps Figure 8-7. A6 High Voltage Sense PCA 8-33...
Page 160 5725A Instruction Manual Table 8-8. A12 Transformer Enclosure Assembly Reference Fluke Stock Description Tot Qty Notes Designator SCREW,FHU,P,LOCK,SS,6-32,.250 320093 SCREW,PH,P,LOCK,MAG SS,6-32,.2 772236 SCREW,PH,P,LOCK,STL,6-32,.625 152181 SCREW,PH,P,LOCK,SS,4-40,.187 149567 SCREW,PH,P,LOCK,SS,6-32,.500 320051 SCREW,PH,P,LOCK,STL,6-32,.750 114223 WASHER,FLAT,STL,.149,.375,.031 110270 SCREW,HH,H,LOCK,STL,10-32,.375 854794 SCREW,PH,P,LOCK,STL,6-32,.187 381087 SCREW,HH,H,STL,1/4-20,4.00 845078 WASHER,LOCK,SPLIT,STL,.255,.49 111518 WASHER,FLAT,STL,.260,.375,.032...
Page 161 List of Replaceable Parts aq32f.tif Figure 8-8. A12 Transformer Enclosure Assembly 8-35...
Page 162 5725A Instruction Manual aq33f.tif Figure 8-8. A12 Transformer Enclosure Assembly (cont) 8-36...
Page 163 List of Replaceable Parts aq34f.tif Figure 8-8. A12 Transformer Enclosure Assembly (cont) 8-37...
Page 164 5725A Instruction Manual aq35f.tif Figure 8-8. A12 Transformer Enclosure Assembly (cont) 8-38...
Page 165 List of Replaceable Parts Table 8-9. A30 Inductor PCA Reference Fluke Stock Description Tot Qty Notes Designator CONN,MATE-N-LOK,HEADER,4 PIN 512269 L1,L2 CHOKE 490888 HARNESS, LINE VOLTAGE 843011 1. For schematic, See A6 section 9. 5725A-1603 aq42f.eps Figure 8-9. A30 Inductor PCA...
Page 166 5725A Instruction Manual 8-40...
Page 167 Chapter 9 Schematic Diagrams Figure No. 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.
Page 168 5725A Instruction Manual...
Page 169: Schematic Diagrams
Schematic Diagrams aq48f.eps 5725A-1611 Figure 9-1. A1 Interconnect PCA...
Page 170 5725A Instruction Manual Figure 9-1. A1 Interconnect PCA (cont)
Page 171 Schematic Diagrams Figure 9-1. A1 Interconnect PCA (cont)
Page 172 5725A Instruction Manual aq52f.eps 5725A-1650 Figure 9-2. A2 Current Amplifier PCA...
Page 173 Schematic Diagrams Figure 9-2. A2 Current Amplifier PCA (cont)
Page 174 5725A Instruction Manual Figure 9-2. A2 Current Amplifier PCA (cont)
Page 175 Schematic Diagrams Figure 9-2. A2 Current Amplifier PCA (cont)
Page 176 5725A Instruction Manual aq56f.eps 5725A-1661 Figure 9-3. A3 High Voltage Amplifier PCA 9-10...
Page 177 Schematic Diagrams Figure 9-3. A3 High Voltage Amplifier PCA (cont) 9-11...
Page 178 5725A Instruction Manual Figure 9-3. A3 High Voltage Amplifier PCA (cont) 9-12...
Page 179 Schematic Diagrams aq59f.eps 5725A-1631 Figure 9-4. A4 Power Supply PCA 9-13...
Page 180 5725A Instruction Manual Figure 9-4. A4 Power Supply PCA (cont) 9-14...
Page 181 Schematic Diagrams Figure 9-4. A4 Power Supply PCA (cont) 9-15...
Page 182 5725A Instruction Manual aq62f.eps TYPICAL COMMUNICATIONS ACTIVITY AT PINS 12 AND 13 OF U507. 5725A-1650 aq43f.eps 10 ms Figure 9-5. A5 Digital PCA 9-16...
Page 183 Schematic Diagrams Figure 9-5. A5 Digital PCA (cont) 9-17...
Page 184 5725A Instruction Manual aq63f.eps STANDBY VOLTAGE STANDBY CURRENT STANDBY 5725A-1601 aq44f.eps 10 ms 10 ms 10 ms Figure 9-6. A6 High Voltage Sense PCA 9-18...
Page 185 Schematic Diagrams Figure 9-6. A6 High Voltage Sense PCA (cont) 9-19...
Page 186 5725A Instruction Manual Figure 9-6. A6 High Voltage Sense PCA (cont) 9-20...
Page 187 Schematic Diagrams Figure 9-6. A6 High Voltage Sense PCA (cont) 9-21...
Page 188 5725A Instruction Manual Figure 9-6. A6 High Voltage Sense PCA (cont) 9-22...
Page 189 Schematic Diagrams aq45f.eps Figure 9-7. A12 Transformer Enclosure Assembly 9-23...
Page 190 5725A Instruction Manual 9-24...
Page 191: Index
5700A Calibration interface, 2-6 Interconnect assembly (A1), 6-14 Line power, 2-7 Power Supply assembly (A4), 6-9 Cables, Activating the 5725A output, 3-12, 3-13, 3-14 UUT, 1-4 Analog monitor (on High Voltage Sense Calibration, 5-3 assembly) faults, 7-7 CALIBRATION switch, 3-3...
Page 192 5725A Instruction Manual PCAs, 6-5 —H— Clearance requirements, 2-5 High Voltage Amplifier assembly (A3), 4-24 Communication, 5700A and 5725A, 4-8 Access procedure, 6-12 Connectors, (also see binding posts, Block diagram, 4-25 terminals), 3-5 Theory of operation, 4-24 5700A CALIBRATOR, 2-6, 3-7...
Page 193 —S— Fault when entering voltage operate, 7-8 Selecting line voltage, 2-7 Fault when entering voltage standby, 7-7 Self diagnostics, 7-3 Turning on the 5725A, 3-8 Service information, 2-5 Setting the output, 3-3 —U— Setting up, 2-3 Unpacking and inspection, 2-3...
Page 194 5725A Instruction Manual...
Page 195 The revision letter stamped on the indicated PCA is equal to or higher than that given with each change. No revision letter is indicated at the beginning of the change. ® © 1996 Fluke Corporation. All rights reserved. Printed in the U.S.A.
Page 196 5725A Manual Supplement Change #1 On page 6-8, replace the first sentence in the Warning with the last sentence in step 6. On page 6-9, paragraph 6-8, replace step 2 with: 2. Return the High Voltage Amplifier assembly (A3) (and the Current Amplifier assembly (A2) if it has been accessed) to the normal position, and reinstall the assembly retaining screws.

Fluke 5725A Instruction Manual

Introduction and Specifications

Installation

Chapter 2

Operating Notes

Chapter 3

Theory of Operation

Chapter 4

Calibration and Verification

Maintenance

Chapter 6

Troubleshooting

Chapter 7

List of Replaceable Parts

Schematic Diagrams

Index

Quick Links

Troubleshooting

Related Manuals for Fluke 5725A

Summary of Contents for Fluke 5725A

Table of Contents