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General| Frequency Range | 20 Hz to 100 kHz |
|---|---|
| Operating Temperature | 0°C to 50°C |
| Display | Vacuum Fluorescent |
| DC Current Range | 0 to 2 A |
| AC Current Range | 0 to 2 A |
Presents the detailed technical specifications for the 8840A multimeter.
Instructions on how to properly connect the 8840A to a power source, including voltage selection.
Explains the display, error messages, and overrange indication.
Covers running self-tests, selecting measurement ranges, and trigger modes.
Provides procedures for performing various measurements and understanding input protection.
Steps for connecting and configuring the 8840A for IEEE-488 bus operation.
Lists commands that control specific instrument functions like measurements and requests.
Retrieves the instrument's error status register, indicating any errors encountered.
Command to load function, range, reading rate, and trigger mode settings.
Command to enter variable input calibration values.
Clears the instrument's error status register without affecting other settings.
Initiates the instrument's diagnostic self-tests.
Resets the instrument to power-up default settings and clears buffers.
Details the format for numeric data, overrange indications, and error messages.
Describes the format for error messages, including error codes and suppression of suffix.
Describes the serial poll register and how it indicates status and SRQ events.
Instructions for calibrating the instrument remotely using the IEEE-488 interface.
Explains how to measure DC voltages, covering circuit loading and input bias current errors.
Provides a procedure to correct for input bias current errors using the OFFSET function.
Explains how to measure resistance using 2-wire and 4-wire configurations.
Explains the 4-wire ohms measurement for high accuracy, correcting for lead and contact resistance.
Explains DC current measurement, focusing on burden voltage error and its calculation.
Explains the True RMS AC Option for measuring AC voltages and currents accurately.
Provides detailed explanations of each functional block, including component references.
Details the protection circuitry for DC voltage inputs, including MOVs and fusible resistors.
Explains the precise current source used in ohms functions and its troubleshooting uses.
Explains the 4-wire ohms measurement for high accuracy, including lead resistance correction.
Explains the A/D converter, its components, and the recirculating remainder technique.
Explains the function of the Digital Controller and its components like the In-Guard Microcomputer.
Details how the µC controls A/D sampling, rates, and calibration.
Explains the troubleshooting mode for diagnosing digital hardware issues.
Describes the circuit enabling communication between the Digital Controller and IEEE-488 interface.
Checks for the In-Guard µC and its associated signals in troubleshooting mode.
Details waveforms for troubleshooting the In-Guard Microcomputer system.
Details tests to verify instrument performance against specifications.
Instructions on running built-in tests to diagnose instrument hardware issues.
Procedure to verify the accuracy of the DC voltage measurement function.
Procedure to verify the accuracy of the AC voltage measurement function.
Procedure to verify the accuracy of the 2-wire and 4-wire ohms functions.
Procedure to test the accuracy of the mA DC current measurement function.
Introduces the calibration process, including basic and advanced procedures.
Outlines the four main parts of the basic calibration process.
Calibrates the analog-to-digital converter for offset, gain, and linearity.
Calibrates the instrument's offsets and gains for each function and range.
Guidance on approaching troubleshooting, starting with power supplies and self-tests.
Provides detailed descriptions of each self-test and how to interpret results.
Troubleshooting steps for the DC Scaling circuit, including power supply and signal checks.
Steps for diagnosing A/D converter failures, including checking supplies and waveforms.
Procedure for diagnosing power supply issues, checking voltages, ripple, and load regulation.
Troubleshooting steps for the True RMS AC option, including signal flow and PCA checks.
