The manual for the B&K Precision Bench Switching DC Power Supplies models 1665, 1666, and 1667 provides detailed instructions on safety precautions, setup, operation procedures, and troubleshooting for these laboratory-grade devices. It covers the use of coarse and fine controls for voltage and current limiting, automatic crossover between constant voltage and constant current modes, and includes specifications, warranty information, and service details.
Manual Overview
The B&K Precision Model 1665/1666/1667 manual provides detailed guidance for operating and troubleshooting these bench switching DC power supplies. The units feature dual control for output voltage and current, with both coarse and fine adjustments, allowing precise calibration. The power supplies can operate in constant voltage or constant current modes, automatically crossing over based on load conditions. Troubleshooting involves checking the output settings and ensuring connections are secure, especially when high impedance leakage might occur without grounding. Error diagnostics are primarily visual, using LED indicators for constant current (CC) and constant voltage (CV) modes. Calibration involves adjusting the current limit by short-circuiting the output terminals and setting the desired limit. For board-level issues, users are advised to refer servicing to the manufacturer. The manual emphasizes safety precautions, such as avoiding contact with live terminals and ensuring proper ventilation. The units are protected by a one-year limited warranty, covering defects in materials and workmanship, but excluding misuse or unauthorized repairs.
Quick Issues Covered
- Diagnose constant voltage/current mode crossover issues.
- Resolve power-up failures via input socket fuse check.
- Use schematics for circuit tracing and fault isolation.
Overview
The manual covers the operation and specifications of the B&K Precision Bench Switching DC Power Supplies, models 1665, 1666, and 1667. It includes safety instructions, an introduction to the product, detailed specifications, controls and indicators, and operation procedures. The power supplies are laboratory-grade with features like coarse and fine output voltage and current limiting controls, making them suitable for research and development work. The manual also provides warranty and service information.
Specifications
- Output Voltage: 1-19VDC (1665), 1-40VDC (1666), 1-60VDC (1667)
- Output Voltage Control: Fine & Coarse
- Output Current: 0-10A (1665), 0-5A (1666), 0-3.3A (1667)
- Ripple & Noise (P-P): 20mV
- Load Regulation: 0.5% + 200mV
- Line Regulation: 50mV
- Input Voltage: 100 – 240 VAC, 50Hz / 60Hz
- Meter Type: Digital LED
- Voltmeter Resolution: 10 mV
- Ammeter Resolution: 10mA
- Voltmeter Accuracy: 1% + 2 counts
- Ammeter Accuracy: 0.5% + 2 counts
- Indicators: CC & CV
- Cooling System: Thermostatic control fan
- Protection Devices: Approvals: CE
- Dimension (WxHxD): 8" x 4.5" x 11" (205 x 115 x 275 mm)
- Weight: 6.6lbs (3 Kg)
Controls & Indicators
Power Switch — Turns the power supply ON/OFF.
DC Voltmeter (LED Display) — Indicates the present output voltage with auto range.
DC Ammeter (LED display) — Indicates the present output current with auto range.
Constant Current Mode (C.C.) — Indicator indicates the power supply is operating in constant current mode.
Constant Voltage Mode (C.V.) — Indicator indicates the power supply is operating in voltage mode.
Current Fine Adjust — Fine adjust knob for current limiting point and current value in constant current mode.
Current Coarse Adjust — Coarse adjust knob for current limiting point and current value in constant current mode.
Voltage Fine Adjust — Fine adjust knob for the output voltage in voltage mode.
Voltage Coarse Adjust — Coarse adjust knob for the output voltage in voltage mode.
Output Terminal Positive (+) — Terminal for tapping of positive (+) output.
Output Terminal Negative (-) — Terminal for tapping of negative (-) output.
GND Terminal — Chassis ground terminal. Normally, this is connected to either the + or – terminal depending on the application.
Installation / Setup
The setup highlights for the BK Precision Model 1665/1666/1667 Bench Switching DC Power Supplies include the following:
– Ensure the unit is not used near water and is cleaned only with a dry cloth.
– Do not block any ventilation openings and avoid installing the unit near heat sources.
– Prevent the power cord from being walked on or pinched.
– Unplug the unit during lightning storms or when unused for extended periods.
– The unit must be used within its specified range, and the rated input voltages can be found on the rating label at the back of the unit.
– Before plugging into the AC supply, check the rating label.
– Allow at least 80 mm of space from the wall for the fan on the rear panel.
– The power supply can operate as a constant voltage or constant current source, with automatic crossover based on load conditions.
– Ground connections can be made using the shorting plate at the terminal, and care should be taken when operating without grounding due to potential high impedance leakage.
Operation
The operation of the power supply involves controlling the output voltage and current using dual controls consisting of coarse and fine potentiometers. The device can function as either a constant voltage source or a constant current source, with automatic crossover between modes based on load conditions. For constant voltage operation, the power supply maintains a set voltage as long as the load current is below the current limit. If the load current reaches the current limit, the device switches to constant current mode. Conversely, in constant current mode, if the load voltage matches the set output voltage, the device switches to constant voltage mode. Users can preset the current limiting value by short-circuiting the output terminals and adjusting the current limit control to the desired value. Ground connections can be made for either positive or negative output terminals, with or without grounding, using a shorting plate at the terminal.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Do not use this apparatus near water.
Clean only with dry cloth.
Do not block any ventilation openings.
Do not install unit near any heat source or heating emitting devices.
Prevent the power cord from being walked on or pinched.
Unplug this unit during lighting storms or when unused for long periods of time.
The unit must be used within its specified range.
The rated input voltages can be found on the rating label at the back of the unit.
Before plugging into the AC supply, check with the rating label.
Refer all servicing to manufacturer.
Model 1667 has maximum output voltage up to 60Vdc. It may be hazardous to touch metal part of the output terminals. User must avoid touching live metal part of the output terminals.
Download MANUAL Manual (PDF – 221.9 KB)
Bk-precision-1667 manual: assists technicians in troubleshooting and calibrating the device. File size: 221.9 KB.
- Brand: Bk-precision-1667-instruction
- Model: MANUAL
- Type: Manual
- File size: 221.9 KB
Overview
Brief overview of the product.
Specifications
- Key spec 1
- Key spec 2
Controls & Indicators
Control panel/button layout.
Installation / Setup
- Step 1…
- Step 2…
Operation
Basic usage, modes, cycles.
Troubleshooting & Error Codes
| Issue / Code | Fix |
|---|---|
| Example | How to fix… |
Safety & Warnings
- Important warning…
Downloads
Bk-precision-1667-instruction MANUAL Overview
The Bk-precision-1667 is a versatile digital multimeter designed for precise electrical measurements in both professional and hobbyist environments. This device offers accurate readings for voltage, current, resistance, and continuity, making it an essential tool for troubleshooting and testing electronic circuits and electrical systems.
Main Features and Specifications
- Measurement Functions: AC/DC Voltage, AC/DC Current, Resistance, Continuity, Diode Test
- Display: Large backlit LCD for easy reading in low-light conditions
- Auto-ranging capability for quick and accurate measurements
- Data Hold function to freeze readings on the display
- Overload protection to safeguard the device and user
- Compact and ergonomic design for comfortable handling
- Battery operated with low battery indicator
Basic Usage and Operation Tips
Before using the Bk-precision-1667, ensure the device is powered on and the test leads are properly connected. Select the appropriate measurement mode using the rotary switch. When measuring voltage or current, always start with the highest range to prevent damage. Use the data hold function to capture readings when needed. Always disconnect the test leads when switching between measurement modes to avoid inaccurate readings or damage.
Troubleshooting and Maintenance
If the device does not power on, check the battery and replace it if necessary. Ensure test leads are intact and properly connected. For inaccurate or unstable readings, verify the test lead connections and test the device on a known reference source. Regularly clean the exterior with a soft, dry cloth and avoid exposure to moisture or extreme temperatures. Store the multimeter in a protective case when not in use.
Safety Reminder
Always follow standard electrical safety practices when using the Bk-precision-1667. Do not exceed the maximum input limits specified in the manual. Avoid contact with live circuits to prevent electric shock. Use the device only for its intended purposes and keep it away from children. Properly disconnect power sources before testing circuits to ensure safe operation.