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The B&K Precision 1685B, 1687B, and 1688B switching mode DC power supplies provide various configurations of high output voltage or high output current in a small, lightweight form factor. In addition to their constant voltage (CV) and constant current (CC) modes, these high efficiency DC power supplies offer unique preset and remote control modes. Up to three different presets of voltage and current values can be saved for quick recall through a rear switch. 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. These features make the 1685B, 1687B, and 1688B suitable for a wide range of applications including production testing, telecommunications, R&D, electronic field service, and university labs.
Models | 1685B | 1687B | 1688B |
Output | |||
Variable Output Voltage | 1 – 60 V | 1 – 36 V | 1 – 18 V |
Variable Output Current | 0 – 5 A | 0 – 10 A | 0 – 20 A |
Voltage Regulation | |||
Load (0-100% Load) | ≤ 50 mV | ||
Line (90-132 VAC, 170-264 VAC Variation) | ≤ 20 mV | ||
Current Regulation | |||
Load (10-90% Rated Voltage) | ≤ 100 mA | ||
Line (90-132 VAC, 170-264 VAC Variation) | ≤ 50 mA | ||
Ripple & Noise | |||
Ripple & Noise Voltage (rms) | ≤ 5 mV | ||
Ripple & Noise Voltage (peak-peak) | ≤ 50 mV | ||
Current Ripple & Noise (rms) | ≤ 30 mA | ||
Meter Type & Accuracy | |||
Voltage Meter | 3-Digit LED Display ± 0.2% + 3 counts | ||
Current Meter | 3-Digit LED Display ± 0.2% + 3 counts | ||
Other | |||
Input Voltage | 100-240 VAC 50/60 Hz | ||
Full Load Input Current | 3.7 A (100 VAC) 1.7 A (230 VAC) | 4.6 A (100 VAC) 2.1 A (230 VAC) | 4.6 A (100 VAC) 2.1 A (230 VAC) |
Efficiency | 82% (100 VAC) 86% (230 VAC) | 82% (100 VAC) 86% (230 VAC) | 81% (100 VAC) 85% (230 VAC) |
Switching Frequency | 100 – 120 kHz | ||
Tracking Overvoltage Protections | O/P 1-5 V: set voltage +2 V O/P 5-20 V: set voltage +3 V O/P 20-60 V: set voltage +4 V | O/P 1-5 V: set voltage +2 V O/P 5-20 V: set voltage +3 V O/P 20-36 V: set voltage +4 V |
O/P 1-5 V: set voltage +2 V O/P 5-18 V: set voltage +3 V |
Transient Response Time (50-100% Load) | 1.5 ms | ||
Power Factor Correction | > 0.95 at optimal load | ||
Cooling Method | Thermostatically controlled fan from zero to full speed | ||
Protections | Overload, Overvoltage, Overtemperature | ||
Special Features | 3 User-Defined Voltage and Current Presets, Analog Remote Control | ||
External Timed Programming | Max. 20 voltage and current steps Max. 99 min + 59 sec step time Max. 999 running cycles | ||
General | |||
Operating Temperature | 32 °F to 104 °F (0 °C to 40 °C) ≤ 80% R.H. | ||
Storage Temperature | 5 °F to 158 °F (-15 °C to 70 °C) ≤ 85% R.H. | ||
Dimensions (WxHxD) | 7.9” x 3.5” x 8.2” (200 x 90 x 208 mm) | ||
Weight | 5.2 lbs (2.4 kg) | ||
Two Year Warranty | |||
Supplied accessories | Power cord, instruction manual, application software CD, USB cable, remote control connector | ||
Note: All specifications apply to the unit after a temperature stabilization time of 15 minutes over an ambient temperature range of 23 °C ± 5 °C.
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