The Keithley KPCI-3107 is a 16-bit multifunction data acquisition board for PCI-based systems, delivering simultaneous analog input, digital I/O, and optional analog output capabilities. It acquires signals at up to 100 kSamples/s across 16 single-ended or 8 differential input channels, with 12 programmable gain settings per channel and onboard cold junction compensation support for thermocouple applications. The board’s 256-entry channel gain queue and 2048-sample A/D FIFO enable high-speed mixed-gain acquisition without speed penalty. Integrated autozero circuitry eliminates offset drift, while ±35V continuous overvoltage protection (±15V unpowered) safeguards measurement circuits. Separate calibration factors for each range are stored onboard and applied automatically during configuration changes.
– Technical Specifications
• Resolution: 16-bit analog input
• Maximum Sample Rate: 100 kSamples/s (single channel or aggregate)
• Input Channels: 16 single-ended or 8 differential, software-configurable bipolar/unipolar and differential/single-ended with mixed topology support
• Programmable Gains: 12 gains (1, 2, 4, 8, 10, 20, 40, 80, 100, 200, 400, 800) yielding 24 total ranges (12 unipolar, 12 bipolar)
• Channel Gain Queue: 256 entries, hardware-implemented for full-speed selection
• A/D FIFO Buffer: 2048 samples
• Input Overvoltage Protection: ±35V continuous (powered), ±15V continuous (unpowered)
• Autozero: Software-controlled offset correction
• Thermocouple Support: Direct measurement without external conditioning; STP-36CJC accessory available for cold junction compensation (10mV/°C output)
– Key Features
• Per-channel independent gain programming with automatic calibration switching
• Mixed single-ended and differential channel configuration in real time
• Hardware-managed gain queue eliminates acquisition speed loss during range changes
• Onboard offset and gain calibration factors applied per-range
– Digital I/O
• 32 programmable digital I/O lines
– Typical Applications
Temperature, voltage, vibration, pressure, and strain measurement; analog stimulus-response testing; relay control.
