Overview
The Keithley 58911A milliohmmeter (IBM part number 4022457 503) is a precision laboratory instrument engineered for measuring low-resistance values. As a specialized test meter in the Keithley line, the 58911A delivers accurate readings across a range of milliohm scales, making it essential for quality assurance, maintenance, and fault detection in electrical systems, circuit boards, and industrial components.
Key Features
- Precision milliohm measurement across multiple ranges
- Four-wire measurement capability for elimination of lead resistance errors
- Analog dial display for quick visual readings
- Durable construction designed for laboratory and field use
- Direct ohm reading without calculation
- High repeatability and accuracy for critical testing applications
Technical Specifications
The following specifications define the Keithley 58911A’s measurement capabilities and operating parameters. Verify exact specifications with technical documentation before deployment:
- Measurement Range: Milliohm scale (precise range depends on measurement configuration)
- Display Type: Analog dial meter
- Measurement Method: Four-wire (Kelvin) configuration available
- Test Current: Configurable for various measurement applications
- Accuracy: Typical laboratory-grade precision for low-ohm readings
- Manufacturer: Keithley Instruments
- IBM Part Number: 4022457 503
Typical Applications
The Keithley 58911A is well-suited for:
- Contact Resistance Measurement: Testing electrical contacts and connection points for excessive resistance
- Bonding Verification: Confirming solder joints, welds, and mechanical bonds meet resistance specifications
- Circuit Board Testing: Inspecting PCB traces, jumpers, and interconnects for continuity and resistance anomalies
- Maintenance & Troubleshooting: Identifying corroded or damaged components in electrical systems
- Quality Control: Production verification of assemblies requiring low-resistance characteristics
Compatibility & Replacements
Compatible With
- Kelvin test leads (four-wire probe configurations)
- Standard laboratory bench power supplies
- Industrial control and electronic assembly testing workflows
- Quality control and production test environments
Replaces / Drop-In Replacement For
The Keithley 58911A serves as a replacement for legacy milliohmmeter systems in equipment lineups where IBM part 4022457 503 was originally specified. Verify compatibility with your system integrator before ordering, as direct replacement depends on mounting configuration and control interface requirements.
Works With
- Four-wire (Kelvin) measurement probes and test leads
- Bench-top and portable test setups
- Laboratory data logging systems (when applicable)
- Industrial electronics repair and verification procedures
