Keithley 4225-RPM Remote Preamplifier/Switch Module
The Keithley 4225-RPM is a remote preamplifier/switch module designed to enhance the sensitivity and flexibility of measurement systems. It provides low-noise amplification and signal routing capabilities for various applications.
- Model
- Keithley 4225-RPM
- Calibration
- Available on request
- Price
- $3,270
- Status
- In stock
- RFQ ref
- 4225-RPM
This unit
The Keithley 4225-RPM Remote Preamplifier/Switch Module is an expansion unit for the 4200A-SCS Parameter Analyzer that extends low-current measurement capabilities and enables automatic switching between DC SMUs, C-V, and ultra-fast pulsed I-V instruments without re-cabling. This remote amplifier and multiplexer eliminates the need for manual reconfiguration when transitioning between measurement types, reducing test setup complexity and cycle time.
Technical Specifications The 4225-RPM adds six current measurement ranges to the 4225-PMU Ultra-Fast Pulsed I-V Instrument Module: 100 nA, 1 μA, 10 μA, 100 μA, 1 mA, and 10 mA. Current measurement resolution reaches <200 pA without averaging, with a noise floor of approximately 10 pA. Noise performance varies by range: 200 pA (100 nA range), 2 nA (1 μA), 5 nA (10 μA), 50 nA (100 μA), 300 nA (1 mA), and 1.5 μA (10 mA). Output resistance typically ranges from 20 Ω to 50 Ω. The 4225-RPM-LR variant reduces this to 2 Ω to 3 Ω and supports capacitive loads up to 75 pF, with correspondingly reduced load-line effects. Autoranging functionality enables automatic range selection during pulsed I-V sweeps, optimizing current measurement across different signal levels. Recommended minimum pulse widths scale from 134 μs (100 nA range) to 160 ns (10 mA range). Minimum measure windows range from 10 μs (100 nA) down to 20 ns (10 mA).
Key Features
Automatic instrument switching - no re-cabling required
Extends 4225-PMU measurement range into the nanoampere regime
Autoranging across six current decades
Compact remote amplifier design
Two variants: standard (20–50 Ω output) and low-resistance (2–3 Ω output)
Typical Applications Characterization of low-current devices including diodes, transistors, and other semiconductor components requiring I-V curves across multiple decades of current.
Compatibility & Integration Designed for integration with Keithley 4200A-SCS Parameter Analyzer mainframes.
Specifications
| Parameter | Value |
|---|---|
| Voltage / Current Range | 100 nA to 10 mA ranges |
Keithley 4225-RPM — Repair & Calibration Service
Aumictech offers NIST-traceable calibration and repair for the Keithley 4225-RPM. Calibration covers analog input channel accuracy and offset at all gain settings, analog output accuracy, digital I/O logic threshold verification, sample rate and timing accuracy, and trigger and synchronization bus functional verification. NI CompactRIO and PXI chassis also undergo backplane trigger line integrity check.. All calibrations ship with a NIST-traceable certificate. Turnaround is typically 1–3 business days after receipt.
Common Keithley 4225-RPM faults: power supply failure (cRIO-9073/9074), C-series slot connector wear, PXI chassis fan failure, GPIB interface failure on VXI controllers, BIOS/EEPROM corruption. NI CompactRIO most common faults are power supply failure on older cRIO-9073/9074 chassis and C-series module slot connector wear from repeated hot-swap cycles. PXI chassis fan failure is the most common wear item — chassis fans are field-replaceable. VXI embedded controllers most commonly develop EEPROM corruption and GPIB interface failure.
Keithley 4225-RPM price
This Keithley 4225-RPM is listed at $3,270. Calibration is available separately from $450. Contact us for volume pricing or if you need multiple units.
Keithley 4225-RPM calibration cost
NIST-traceable calibration for the Keithley 4225-RPM is $450 (standard — pass/fail certificate and calibration sticker) or $650 (full measured data at every test point, reference standards documented, traceability chain included). Calibration for this instrument covers analog input channel accuracy and offset at all gain settings, analog output accuracy, digital I/O logic threshold verification, sample rate and timing accuracy, and trigger and synchronization bus functional verification. NI CompactRIO and PXI chassis also undergo backplane trigger line integrity check.. Turnaround is 1 to 3 business days after receipt. See full calibration details →
