The manual for B&K Precision Models 1665, 1666, and 1667 covers the setup and operation of bench switching DC power supplies, detailing safety instructions, specifications, controls, and operating procedures. It also provides troubleshooting guidance, including information on automatic crossover between constant voltage and current modes, and outlines warranty and service information.
Manual Overview
The B&K Precision Model 1665/1666/1667 manual provides detailed guidance for technicians using these bench switching DC power supplies. The manual emphasizes troubleshooting through a structured flow, focusing on error codes and diagnostics. It highlights the importance of understanding the dual control system for output voltage and current, which includes both coarse and fine adjustments. The power supplies operate in either constant voltage or constant current modes, automatically switching based on load conditions. Technicians are advised to preset current limiting values to prevent excessive current draw, which involves short-circuiting the output terminals and adjusting the current limit controls. The manual also provides board-level guidance, detailing the functions of front and rear panel controls, including the power switch, LED displays for voltage and current, and the cooling fan system. Safety instructions are crucial, especially for Model 1667, which can output up to 60VDC, posing a hazard if metal parts of the output terminals are touched. The manual underscores the importance of adhering to specified ranges and ensuring proper grounding to avoid high impedance leakage.
Quick Issues Covered
- Diagnose constant voltage/current mode crossover issues.
- Resolve power-up failures with input voltage checks.
- Use schematics for circuit tracing and troubleshooting.
Overview
The manual covers the operation and features of the B&K Precision Bench Switching DC Power Supplies, models 1665, 1666, and 1667. These are laboratory-grade power supplies with fine and coarse output voltage and current limiting controls, suitable for research and development work. The manual includes safety instructions, specifications, controls and indicators, operation procedures, warranty information, and service details.
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 shows the power supply is operating in constant current mode.
Constant Voltage Mode (C.V.) — Indicator shows 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 include ensuring the unit is used within its specified range and checking the rated input voltages on the rating label before plugging into the AC supply. It is important to allow at least 80 mm of space from the wall for the fan on the rear panel. The power supply operates as a constant voltage or constant current source with automatic crossover based on load conditions. Ground connections can be configured for either positive or negative output terminals, and a shorting plate is used for these connections.
Operation
The operation of the power supply involves controlling the output voltage and current using dual controls consisting of coarse and fine potentiometers. The power supply can operate in two basic modes: constant voltage and constant current. It automatically switches between these modes based on load conditions. In constant voltage mode, 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, it switches to constant current mode. Conversely, in constant current mode, the power supply maintains a set current until the load voltage reaches the set voltage, at which point it switches to constant voltage mode. Users can preset the current limiting value by short-circuiting the output terminals and adjusting the current limit control. Ground connections can be made for either positive or negative output terminals, with or without grounding.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
The safety warnings and precautions explicitly present in the manual are as follows:
1. Do not use the apparatus near water.
2. Clean only with a dry cloth.
3. Do not block any ventilation openings.
4. Do not install the unit near any heat source or devices that emit heat.
5. Prevent the power cord from being walked on or pinched.
6. Unplug the unit during lightning storms or when unused for long periods of time.
Precautions:
1. The unit must be used within its specified range.
2. The rated input voltages can be found on the rating label at the back of the unit.
3. Before plugging into the AC supply, check with the rating label.
4. Refer all servicing to the manufacturer.
Warning:
– Model 1667 has a maximum output voltage of up to 60Vdc. It may be hazardous to touch the metal part of the output terminals. Users must avoid touching live metal parts of the output terminals.
Download 2 Manual (PDF – 221.9 KB)
Bk-precision-1665-instruction-manual Model 2: Guide for technicians to troubleshoot and calibrate equipment efficiently. File size: 221.9 KB.
- Brand: Bk-precision-1665-instruction-manual
- Model: 2
- 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-1665 Instruction Manual Overview
The Bk-precision-1665 is a versatile digital multimeter designed for accurate electrical measurements in both professional and educational settings. This device allows users to measure voltage, current, resistance, and continuity with high precision, making it an essential tool for troubleshooting and testing electronic circuits and components.
Main Features and Specifications
- Measurement functions: AC/DC voltage, AC/DC current, resistance, continuity, diode test
- Large backlit LCD display for clear readings
- Auto-ranging capability for ease of use
- Data hold function to freeze displayed values
- Max/min recording to capture peak measurements
- Overload protection on all ranges
- Low battery indicator
- Compact and durable design for field and lab use
Basic Usage and Operation Tips
Before using the Bk-precision-1665, ensure the test leads are properly connected to the correct input jacks. Select the desired measurement function and range using the rotary switch. For voltage and current measurements, connect the test leads in parallel or series with the circuit respectively. Always start with the highest range to prevent damage and then adjust downward for more precise readings. Use the data hold button to freeze the displayed value when needed.
Troubleshooting and Maintenance
If the device displays erratic readings or fails to power on, check the battery status and replace it if necessary. Inspect test leads for damage or wear and replace if faulty. Clean the device regularly with a soft, dry cloth and avoid exposure to moisture or extreme temperatures. If the multimeter does not function correctly after these checks, consult the detailed troubleshooting section in the manual or contact customer support.
Safety Reminder
Always observe proper safety precautions when using the Bk-precision-1665. Never exceed the maximum input limits specified in the manual. Avoid measuring voltages or currents in circuits that exceed the device’s rated capacity. Disconnect power before connecting or disconnecting test leads. Use caution when working with high voltages to prevent electric shock or injury.