The manual for B&K Precision models 1665, 1666, and 1667 covers setup and operation procedures, including dual control for output voltage and current limiting, as well as automatic crossover between constant voltage and constant current modes. It also provides troubleshooting information, such as presetting current limiting values and addressing potential high impedance leakage when the power supply is not grounded.
Manual Overview
The B&K Precision Models 1665, 1666, and 1667 Bench Switching DC Power Supplies manual provides detailed guidance for technicians on troubleshooting, diagnostics, and adjustments. The manual emphasizes the importance of using the power supplies within specified ranges and highlights safety precautions, such as avoiding contact with live metal parts, especially for Model 1667 with its higher voltage capacity. Troubleshooting involves checking the output voltage and current using the digital LED displays, which auto-range for accuracy. Calibration is achieved through fine and coarse adjustments for both voltage and current, enabling precise control over output settings. The power supplies feature automatic crossover between constant voltage (CV) and constant current (CC) modes, depending on load conditions. For diagnostics, the manual outlines the use of indicators for CV and CC modes, and protection devices such as over-voltage, short circuit, and over-temperature safeguards. Technicians are advised to refer servicing to the manufacturer and to ensure proper grounding to avoid high impedance leakage. The manual also includes warranty and service information for addressing defects and obtaining repairs.
Quick Issues Covered
- Diagnose power-up failures with voltage and current indicators.
- Identify error codes for constant voltage/current mode issues.
- Use schematics for circuit tracing and troubleshooting.
Overview
The product is a series of bench switching DC power supplies, specifically models 1665, 1666, and 1667, designed for laboratory use with features such as coarse and fine output voltage and current limiting controls. The manual covers safety instructions, specifications, controls and indicators, and operation procedures for these power supplies.
Specifications
- Output Voltage: 1-19VDC 1-40VDC 1-60VDC
- Output Voltage Control: Fine & Coarse
- Output Current: 0-10A 0-5A 0-3.3A
- 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 Range: Auto-Range 31/2digit LED Auto-Range 3digit LED
- Ammeter Range: Auto-Range 31/2digit LED Auto-Range 3digit LED
- Voltmeter Accuracy: 1% + 2 counts
- Ammeter Accuracy: 0.5% + 2 counts
- Indicators: CC & CV
- Cooling System: thermostatic control fan
- Protection Devices: Over Voltage, Short Circuit, Over Temperature
- 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 source does not contain specific information about installation or setup highlights, such as wiring, clearances, calibration, or prerequisites.
Operation
The operation of the bench switching DC power supplies 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. Automatic crossover to either mode occurs based on load conditions. In constant voltage mode, the power supply functions as a constant voltage source as long as the load current is below the set current limit. If the load current reaches or exceeds the current limit, it automatically switches to constant current mode. Conversely, in constant current mode, the power supply maintains a constant current until the load voltage matches the set output voltage, at which point it switches back 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 negative or positive output terminals, with or without grounding, using a shorting plate at the terminal.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
SAFETY INSTRUCTIONS & PRECAUTIONS
1. Do not use this apparatus near water.
2. Clean only with dry cloth.
3. Do not block any ventilation openings.
4. Do not install unit near any heat source or heating emitting devices.
5. Prevent the power cord from being walked on or pinched.
6. Unplug this unit during lighting 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 manufacturer.
WARNING
Model 1667 has maximum output voltage up to 60 Vdc. 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 – 235.8 KB)
Bk-precision-1666 manual assists technicians in troubleshooting and calibrating equipment efficiently. File size: 235.8 KB.
- Brand: Bk-precision-1666-instruction
- Model: MANUAL
- Type: Manual
- File size: 235.8 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-1666-instruction Manual Overview
The Bk-precision-1666 is a versatile and reliable piece of test equipment designed for precise electrical measurements. Ideal for both professional technicians and electronics enthusiasts, this device offers accurate voltage, current, and resistance readings. Its robust build and user-friendly interface make it suitable for laboratory, field, and educational applications.
Main Features and Specifications
- Measurement Functions: AC/DC Voltage, AC/DC Current, Resistance
- Display: Large LCD with backlight for easy reading in various lighting 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 lightweight design for portability
- Battery-powered with low battery indicator
Basic Usage and Operation Tips
Before use, ensure the device is powered with fresh batteries and the test leads are properly connected. Select the desired measurement mode using the rotary switch. For voltage measurements, connect the probes in parallel with the circuit; for current, connect in series. Use the data hold function to capture readings for easier recording. Always start with the highest range if unsure about the expected measurement to prevent damage.
Troubleshooting and Maintenance
If the device does not power on, check the battery condition and replace if necessary. Inaccurate readings may be caused by worn or damaged test leads—inspect and replace as needed. Keep the device clean and dry; avoid exposure to extreme temperatures or moisture. Regularly calibrate the instrument according to the manufacturer's recommendations to maintain accuracy.
Safety Reminder
Always observe proper safety precautions when working with electrical equipment. Do not exceed the maximum input limits specified in the manual. Avoid contact with live circuits to prevent electric shock. Use insulated test leads and wear appropriate personal protective equipment. Disconnect power sources before making any connections or adjustments.