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General| Diode Test | Yes |
|---|---|
| Display Digits | 5 digits |
| Interface | RS-232 |
| Frequency Range | 5Hz to 500kHz |
| Continuity | < 25 Ω |
| Basic DC Accuracy | 0.05% |
| Power Supply | 115/230 V AC, 50/60 Hz |
Overview of the Fluke 45 Dual Display Multimeter and its applications.
Guidance on operating the meter, referencing the User's Manual.
Details on available installation kits for battery and IEEE-488 interface.
Explains the manual's structure, interdependence of chapters, and navigation.
Defines notational conventions used throughout the manual for clarity.
Comprehensive technical specifications for the Fluke 45 multimeter.
Introduces the chapter's layered description of Fluke 45 circuitry.
Describes the multimeter's main functional blocks and their roles.
Explains the power supply block's function in providing necessary voltages to the meter.
Details the AMP's role in signal conditioning, A/D conversion, and measurement.
Describes circuits and fuses safeguarding the meter from over-voltage and over-current.
Explains how input signals are scaled and conditioned for the A/D converter.
Details the process of converting analog voltage levels into digital data.
Describes the isolated communication path between the Digital Kernel and AMP.
Explains the function of the Digital Kernel in coordinating meter activities.
Describes how the Display Assembly communicates with the Microprocessor.
Refers to Chapter 8 for the theory of operation of the IEEE-488 option.
Refers to Chapter 7 for the theory of operation of the Battery Pack option.
General heading for detailed explanations of specific circuits.
Details the three functional sections of the power supply.
Explains the function of the power transformer and DC supply conversion.
Describes the pulse-width modulation technique for regulating the 5.1V DC output.
Details the inverter circuit for generating display voltages and in-guard supplies.
Explains the AMP chip's functions and its interaction with the Main Processor.
Details various input protection schemes including MOVs, fuses, and resistors.
Explains signal scaling and filtering for A/D conversion across different rates.
Describes how latching relays route input signals based on selected functions.
Explains signal routing and attenuation for DC voltage measurements.
Describes the ratio ohms technique used for resistance measurements.
Explains how these ranges perform conductance readings.
Details AC voltage scaling and conversion to DC via the true RMS converter.
Explains voltage generation proportional to input current for DCmA.
Describes ACmA signal routing to the AC buffer and RMS converter.
Explains DC and AC amps signal routing via shunts and RMS converter.
Describes front-end configuration for Diode/Continuity test.
Explains how the frequency/continuity comparator uses AC buffer output.
Details the two-pole active filter for noise reduction in DC measurements.
Explains the dual-slope A/D converter process and ranges.
Describes the isolated interface circuit for Microprocessor and AMP communication.
Outlines the six functional blocks of the Digital Kernel.
Details the RS-232 interface components and signal transitions.
Introduces handling, cleaning, fuse replacement, disassembly, and assembly instructions.
Provides instructions for warranty returns and contact information.
General guidance for maintaining the instrument.
Lists necessary equipment for calibration, troubleshooting, and repair.
Details power input specifications and safety warnings for electrical shock.
Crucial guidelines for preventing ESD damage to sensitive components.
Procedures for safely cleaning the meter’s exterior.
Outlines procedures for testing and replacing fuses.
Specifies the location and replacement of the line fuse (F3).
Identifies fuses protecting the 100 mA and 10 A inputs.
Provides a procedure to test the continuity of input fuses.
Details the process for replacing the F1 and F5 input fuses.
Explains how to access and replace the F2 input fuse.
Step-by-step guide for disassembling the meter from assembly to chassis level.
Procedure for removing the meter's outer case and rear bezel.
Instructions for detaching the meter's handle and brackets.
Steps to disconnect input terminals and remove the front panel assembly.
Instructions for releasing tabs and removing the Display PCA.
Procedure for detaching the IEEE-488 PCA and its cables.
Steps to disconnect connectors and remove the Main PCA.
Details removal of protective shields covering the AMP.
Instructions for desoldering and removing the Rms PCA.
Procedure for disconnecting and removing the Battery Option.
Steps for disconnecting various chassis-mounted hardware.
General guide for reassembling the meter following disassembly steps.
Procedure for replacing removed chassis components.
Steps for installing the Battery Kit Option into the meter.
Instructions for soldering the Rms PCA onto the Main PCA.
Procedure for reinstalling protective shields for the AMP.
Steps for installing the Main PCA, including insulator and standoff verification.
Procedure for installing the IEEE-488 circuit board and cables.
Steps for cleaning and connecting the display, keypad, and lens.
Procedure for attaching the assembled front panel to the chassis.
Instructions for reattaching the handle and its mounting brackets.
Final step to secure the meter case and rear bezel.
Introduces performance tests and calibration procedures for verifying meter operation.
Lists recommended test equipment needed for performance tests and calibration.
Provides tests to verify Fluke 45 operation against published specifications.
Details closed-case calibration using front panel controls and known reference sources.
Introduces the basic calibration steps and their interdependence.
Explains how to access the calibration mode and navigate the menu.
Describes how to safely exit calibration mode without losing data.
Step-by-step procedure for calibrating DC Voltage functions via the front panel.
Step-by-step procedure for calibrating AC Voltage functions via the front panel.
Procedure for calibrating DC and AC milliamp functions via the front panel.
Procedure for calibrating DC and AC amps functions using a boost amplifier.
Procedure for calibrating Ohms function via the front panel, including prompt editing.
Alternative procedure for Ohms calibration using discrete resistor values.
Procedure for calibrating continuity and hysteresis threshold functions.
Procedure for calibrating frequency measurements via the front panel.
Specific adjustment procedure for meters failing high frequency VAC performance tests.
Explains how to manually edit calibration prompts for non-standard points.
Details how to perform calibration using a computer interface.
Describes initial setup requirements for computer interface calibration.
Procedure for connecting and configuring the meter for RS-232 calibration.
Procedure for connecting and configuring the meter for IEEE-488 calibration.
Outlines the overall computer interface calibration process and considerations.
Step-by-step computer interface calibration for DC Volts.
Step-by-step computer interface calibration for AC Volts.
Step-by-step computer interface calibration for DC/AC Milliamps.
Step-by-step computer interface calibration for DC/AC Amps.
Step-by-step computer interface calibration for Ohms.
Step-by-step computer interface calibration for continuity/hysteresis.
Step-by-step computer interface calibration for frequency.
Final steps to exit calibration mode after computer interface use.
Alternative computer interface calibration for Ohms using discrete resistors.
Introduces error codes and semi-modular design for troubleshooting.
Provides an introduction to SMT and its specific servicing requirements.
Explains power-up self-tests and how failures are reported via error codes.
Outlines the overall approach to troubleshooting the Fluke 45.
Guides users through troubleshooting the meter's power supplies.
Details troubleshooting steps for the Raw DC Supply section.
Explains how to troubleshoot the 5V switching supply using an oscilloscope.
Provides guidance on troubleshooting the inverter circuit.
Addresses problems indicated by Error 8 or 9, focusing on analog circuits.
Describes a test for the optoisolators and UART circuitry.
Troubleshooting procedures for DC Voltage measurements.
Troubleshooting procedures for AC Voltage measurements.
Troubleshooting procedures for Ohms measurements.
Procedures for diagnosing issues related to the display and digital components.
Specific steps to troubleshoot problems with the display assembly.
Discusses common calibration failure indications and causes.
Introduces calibration failure troubleshooting and error indications.
Identifies key components involved in measurement function calibration.
Explains how calibration of one function can affect others.
Describes how to retrieve and verify calibration constants via the computer interface.
Outlines the procedure for programming a new EEROM with the meter's serial number.
Introduces the chapter containing illustrated lists of replaceable parts.
Provides detailed instructions on ordering replacement parts from Fluke.
Lists contact information for Fluke customer support and web resources.
Defines assembly revision levels documented in the manual.
Explains how changes and improvements are identified and documented.
Directs users to detailed listings of Fluke 45 parts.
Introduces the Battery Kit as a field-installable option for portable operation.
Lists specifications for the Battery Kit, including cell type and charge time.
Explains the fundamental principles behind the Battery Pack Option's functionality.
Describes the five functional blocks of the Battery Pack Option PCA.
Details the switching power supply's regulation and temperature compensation.
Explains how the switch monitors and adjusts charging voltage based on battery current.
Describes the comparator circuit that monitors battery voltage for the indicator.
Explains the FET switch circuit that prevents deep battery discharge.
Details the trickle charger circuit that maintains battery charge on line power.
Describes other circuits within the battery pack option, like diodes and fuse.
Guidance for maintaining the Battery Pack Option.
Step-by-step procedure for removing the Battery Pack Option from the meter.
Step-by-step procedure for installing the Battery Kit Option into the meter.
Outlines procedures to verify the proper performance of the Battery Pack Option.
Basic tests to verify the general functionality of the Battery Pack Option.
Specific tests for the low battery indicator and disconnect circuits.
Procedure to verify the operation of the Cycle/Float Charge Rate Switch.
Describes how to adjust the Battery Pack Option's controls for optimal performance.
Provides guidance and procedures for troubleshooting the Battery Pack Option.
Mentions that performance tests can also be used for fault isolation.
Refers to Chapter 9 for the schematic diagram of the Battery Pack Option.
Directs users to illustrations and tables for replaceable parts of the option.
Introduces the IEEE-488 Interface Option for programmable instrument use.
Explains the fundamental principles of the IEEE-488 interface standard.
Describes the functional blocks implementing the IEEE-488 standard.
Details the circuits comprising the IEEE-488 Assembly.
Explains the interface via ribbon cables to the Main Assembly.
Describes how the circuit decodes memory cycles for the IEEE-488 Controller.
Details circuits that allow the Microprocessor to turn off power to the IEEE-488 components.
Explains the integrated circuit that manages IEEE-488 bus transactions.
Describes the transceivers and connector for proper electrical characteristics.
Guidance for maintaining the IEEE-488 Interface Option.
Step-by-step procedure for removing the IEEE-488 Interface Option.
Step-by-step procedure for installing the IEEE-488 Interface Option.
Outlines performance tests to verify IEEE-488 Interface operation.
Provides guidance for troubleshooting common problems with the IEEE-488 Interface.
Identifies probable fault areas causing power-up failure when the option is installed.
Addresses issues related to communication between the meter and IEEE-488 controller.
Discusses reasons why the option might not be selectable.
Details troubleshooting steps for handshake failures on the IEEE-488 bus.
Steps to check the remote/local control circuit operation.
Troubleshooting guide for issues receiving commands from the bus.
Troubleshooting guide for issues transmitting query responses.
Checks for correct EOI signal generation during message termination.
Troubleshooting for SRQ generation issues.
Refers to Chapter 9 for the schematic diagram of the IEEE-488 Interface Option.
Directs users to illustrations and tables for replaceable parts of the option.
Provides the schematic diagram for the A1 Main PCA.
Provides the schematic diagram for the A2 Display PCA.
Provides the schematic diagram for the A1A1 True Rms PCA.
Provides the schematic diagram for the A4 Battery PCA.
Provides the schematic diagram for the A5 IEEE-488 Interface PCA.
