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The B&K Precision 1688B is a laboratory grade switching DC power supply with high current output in a small, lightweight form factor. The 1688B provides high output voltage or high output current and feature rotary encoder control knobs, which make setting voltage and current fast and precise. Its dual action push button allows the user to set both coarse and fine, voltage and current levels. In addition to constant voltage (CV) and constant current (CC) modes, the high efficiency DC power supply offers preset and remote control modes. Save up to three different presets of voltage and current values for quick recall. For remote control, an analog remote control terminal is accessible on the rear, or use the USB interface to communicate with the power supply via PC software or remote commands. Specifications. Variable Output Voltage: 1 – 18 V. Variable Output Current: 0 – 20 A. Voltage Regulation Load (0-100% Load): <= 50 mV. Voltage Regulation Line (90-132 VAC, 170-264 VAC Variation): <= 20 mV. Current Regulation Load (0-100% Load): <= 100 mA. Current Regulation Line (90-132 VAC, 170-264 VAC Variation): <= 50 mA. Ripple & Noise Voltage (rms): <= 5 mV. Ripple & Noise Voltage (peak-peak): <= 50 mV. Current Ripple & Noise (rms): <= 30 mA. Voltage Meter: 3-Digit LED Display ± 0.2% + 3 counts. Current Meter: 3-Digit LED Display ± 0.2% + 3 counts. Transient Response Time (50-100% Load): 1.5 ms. External Timed Programming: Max. 20 voltage and current steps, Max. 99 min + 59 sec step time, Max. 999 running cycles.
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