Keithley 2281S Power Supply Repair

$245.00

🛡️ 90-Day Warranty ✓ Fee Credited to Repair ⚡ No Forms Needed

Component-level Keithley 2281S repair backed by a 90-day warranty. Repair includes verification of line regulation and remote sensing performance.

Helpful Resources

📋 How It Works

Submit Request – Pay evaluation fee & provide equipment details
Ship to Us – Send your equipment to our Oregon facility
We Evaluate – Detailed diagnosis & repair estimate
Fee Credited – Your evaluation fee applies to repair cost
We Repair – Professional repair with 90-day warranty

🔧 Fast Turnaround: Most repairs are completed within 1–3 business days.
📏 Precision Calibration: NIST-traceable calibrations included for most repairs.
🛡️ Warranty: 90-day warranty on all repairs.
📝 Transparency: Detailed evaluation and repair estimate before work begins.

✓ Evaluation Fee Credited Toward Repair

This evaluation fee is applied as credit toward your final repair cost. After we evaluate your equipment, you'll receive a detailed estimate before any repair work begins.

Description

Keithley 2281S Power Supply Repair

The Keithley 2281S Power Supply is a programmable power supply – it holds a commanded voltage or current under whatever load the device under test presents, and switches between constant-voltage and constant-current regulation as that load changes. The output stage does the work, and it is where the heat and the wear concentrate.

Certified technicians at June Company service the Keithley 2281S Power Supply for test engineers, production test departments, R&D laboratories, and equipment manufacturers. Every instrument is repaired at component level and verified against reference standards before it ships back, with the measured results documented.

Common Keithley 2281S Power Supply problems we fix

Current limit not holding at the set value.
Output relay not switching.
Cooling fan or thermal shutdown.
Internal power supply faults.
GPIB, LAN, USB or remote-control faults – which breaks automated test sequences while the instrument still works from the front panel.
Display, keypad or front-panel faults.
Output voltage or current out of tolerance under load – a supply can read correct on its own display while delivering something else to the load – readback and actual output are separate circuits and they drift separately.
Will not regulate, or oscillates between CV and CC.
Excessive ripple or noise on the output – invisible on the front panel and capable of corrupting whatever is being powered.
Output stage or pass-element failure.

FAQs

How long does a repair take? Most are completed in 5-10 business days, with a firm quote after evaluation and before any work begins.

Are the measurements verified after repair? Yes, against reference standards, with the measured results documented and returned with the instrument.

Every repair carries a 90-day parts-and-labor warranty, with a firm quote before any work begins. Email us or submit a service request.

Brand

Keithley Repair

Keithley Instruments, part of Tektronix, is renowned for its high-precision electrical and electronic test and measurement equipment. Keithley products are widely used in research, development, and production testing across various industries, including semiconductors, telecommunications, and general electronics. Here’s an overview of key Keithley product categories and their functionalities: 1. Source Measure Units (SMUs) Source Measure Units Features: Combines a precision power source and measurement functions in one instrument. Popular Models: Keithley 2400 Series: General-purpose SMUs suitable for a wide range of applications. Keithley 2600B Series: High-performance SMUs with advanced features for complex measurements. Applications: I-V characterization, semiconductor testing, material research, and device testing. 2. Digital Multimeters (DMMs) Digital Multimeters Features: High-accuracy instruments for measuring voltage, current, resistance, and other electrical parameters. Popular Models: Keithley 2000 Series: 6½-digit multimeters known for precision and reliability. Keithley DMM7510: 7½-digit graphical sampling multimeter with advanced measurement capabilities. Applications: Electronic device testing, circuit verification, and calibration laboratories. 3. Data Acquisition Systems Data Acquisition Systems Features: Systems for capturing and logging multiple channels of data simultaneously. Popular Models: Keithley DAQ6510: Data acquisition and logging multimeter system with a touchscreen interface. Keithley 3706A System Switch/Multimeter: High-density, multi-channel data acquisition system. Applications: Environmental monitoring, product testing, and industrial automation. 4. Electrometers and Picoammeters Electrometers Features: Ultra-sensitive instruments for measuring low-level currents, voltages, resistances, and charges. Popular Models: Keithley 6517B: High-resistance/low-current electrometer with exceptional sensitivity. Applications: Material testing, insulation resistance measurement, and photodiode testing. Picoammeters Features: Specialized devices for measuring extremely low currents. Popular Models: Keithley 6485: Low-cost, high-performance picoammeter. Keithley 6487: Picoammeter/voltage source for more complex applications. Applications: Nanoampere-level current measurements, leakage current testing, and low-current device testing. 5. Parametric Test Systems Parametric Test Systems Features: Integrated systems for performing parametric tests on semiconductor devices. Popular Models: Keithley S530 Series: Parametric test systems for high-throughput semiconductor testing. Applications: Semiconductor device characterization, process monitoring, and quality control. 6. Switching and Control Switching Systems Features: Solutions for automating test setups and expanding the capability of measurement instruments. Popular Models: Keithley 7001 Switch Mainframe: Modular switching system with a wide range of switch cards. Keithley 7700 Series: Multiplexers and matrix switch modules for flexible signal routing. Applications: Automated testing, signal routing, and multiplexing. 7. Low Level Measurements Low-Level Measurement Instruments Features: Instruments designed for precise low-level measurements of voltage, current, and resistance. Popular Models: Keithley 2182A: Nanovoltmeter for low-level voltage measurements. Keithley 6220/6221: Precision current sources for generating low-level currents. Applications: Research and development, low-noise measurements, and sensor testing. 8. Pulse and Arbitrary Waveform Generators Pulse and Arbitrary Waveform Generators Features: Devices for generating precise pulses and complex waveforms. Popular Models: Keithley 3390: Arbitrary waveform/function generator with high performance and flexibility. Applications: Signal generation, component testing, and system stimulation. Conclusion Keithley Instruments provides a comprehensive range of high-precision test and measurement solutions designed to meet the rigorous demands of various industries. Their products, including source measure units, digital multimeters, data acquisition systems, electrometers, picoammeters, parametric test systems, switching systems, low-level measurement instruments, and waveform generators, are known for their accuracy, reliability, and advanced capabilities. These tools are essential for research and development, quality assurance, production testing, and calibration across fields such as electronics, semiconductors, telecommunications, and materials science. Keithley’s innovative solutions help engineers and scientists achieve precise measurements and maintain the highest standards of quality and performance in their work.