The Tektronix TM502A Power Module paired with the AM503B Current Probe Amplifier delivers simultaneous AC and DC current measurement capability for precision circuit analysis and troubleshooting. The TM502A serves as a dual-bay mainframe power supply, accepting multiple line voltages from 100 V to 240 V ±10% and frequencies spanning 48 Hz to 440 Hz, making it suitable for global benchtop deployment. Maximum power draw is limited to 90 W, with configurable plugin supply outputs supporting ±33.5 V, +11.5 V, and dual 25 VAC windings. The AM503B plug-in amplifier converts sensed current into proportional voltage signals for direct oscilloscope measurement, employing a transformer for AC analysis and Hall Effect technology for DC sensing. Microprocessor control enables push-button auto-balance and degauss functions, while bright LED displays indicate current division settings. The system operates across diverse measurement environments including electronics testing, circuit characterization, and equipment diagnostics.
Technical Specifications
TM502A Mainframe:
• Line voltage: 100 V, 120 V, 220 V, 240 V ±10%
• Line frequency: 48 Hz to 440 Hz
• Maximum power draw: 90 W
• Plugin supply voltages: ±33.5 V at 350 mA max each; +11.5 V at 1.3 A max; 17.5 VAC with grounded center tap at 30 VA max; dual 25 VAC windings at 0.5 A / 25 VA combined, floating ≤350 V peak
• Maximum plugin power draw: 35 W DC or 75 VA
• Combined power limitation: <75 VA + 2.1 W DC
• Compartments: 2 dual-bay configuration
• Dimensions: 14.0 cm H × 14.5 cm W × 40.7 cm L
• Weight: 4.0 kg to 6.53 kg
AM503B Amplifier:
• Measurement type: Simultaneous AC and DC current
• Signal conversion: Current to proportional voltage output
• Technology: Transformer-based AC sensing with Hall Effect DC measurement
– Key Features
• Microprocessor-controlled operation with user-friendly interface
• LED display for real-time current and division setting indication
• Dedicated push-button controls for auto-balance and degauss functions
• Bucking current circuitry to prevent core saturation
• Compatible with multiple current probe types including A6304XL
– Typical Applications
• Electronics testing and circuit analysis
• Power supply characterization
• Troubleshooting across industrial and laboratory environments
– Compatibility & Integration
The AM503B plugs directly into TM500 and TM5000 series power modules. The TM502A mainframe accommodates multiple TM500 series plug-in modules simultaneously, enabling expandable measurement configurations.
