The manual for the B+K Precision Model 1744 & 1745 DC Power Supply covers setup and operation, including instructions for adjusting voltage and current, using LED indicators for mode identification, and connecting the power supply in series or parallel configurations. It also provides troubleshooting guidance, such as safety precautions to avoid electrical shock, maintenance tips, and details on overload and reverse polarity protection.
Manual Overview
The B+K Precision Model 1744 and 1745 DC Power Supplies are designed for precise voltage and current regulation, offering outputs of 0-35 volts and 0-10 amps. These units feature both constant voltage and constant current modes, with automatic crossover and LED indicators for mode identification. The power supplies include reverse polarity protection and adjustable current limiting from 5% to 100% to prevent damage to both the unit and connected equipment. The output is isolated from chassis and earth ground, allowing flexible connection configurations, including series and parallel setups for increased voltage or current. The Model 1744 features a high-low current range switch for improved current settability, while the Model 1745 provides large LED displays for monitoring output. Calibration and adjustments are facilitated by coarse and fine controls. The power supplies are equipped with overload protection and are suitable for various applications, including electronics servicing, manufacturing, and education. Safety precautions emphasize the importance of using a polarized 3-wire AC outlet and avoiding unnecessary exposure to high voltage.
Quick Issues Covered
- Diagnose power-up failures with voltage and current adjustments.
- Identify error codes using LED indicators for CV/CC modes.
- Access schematics for circuit tracing and troubleshooting.
Overview
The B+K Precision Models 1744 and 1745 are high-quality general-purpose DC power supplies that provide an adjustable output of 0-35 volts and 0-10 amps. They feature both coarse and fine controls for precise voltage and current settings, and can operate in either constant voltage or constant current modes with smooth automatic crossover. The power supplies include safety features such as reverse polarity protection and current limiting, and are designed for a variety of applications including electronics servicing, manufacturing, design labs, education, and hobbyist use. The output is isolated from chassis and earth ground, allowing flexible connections, and the units can be connected in series or parallel for increased voltage or current output.
Specifications
- Output Voltage Metering
- Output Voltage: 0 to 35 VDC, Coarse and fine adjustment
- Output Current Range: 0 to 10A
- Constant Voltage Operation
- Voltage Regulation
- Line (108 – 132): <0.2% + 2mV
- Load (no load to full load): <0.04% + 2mV
- Recovery Time: <100us typical
- Ripple Voltage: RMS <1mV
- Temperature Coefficient: 0° to +40°C <300 PPM/°C
- Constant Current Operation
- Adjustable Current Limits: 5% to 100%
- Current Regulation
- Line: (108 — 132V) <0.4% + 5mA
- Load: <0.4% + 5mA
- Model 1744
- Voltmeter Range: 0 – 40V
- Voltmeter Accuracy: +2.5%
- Ampmeter Hi Range: 0 to 10A
- Ampmeter Lo Range: 0 to 2.2A
- Ampmeter Accuracy: +2.5%
- Model 1745
- Voltmeter Range: 0-99.99 V
- Voltmeter Accuracy: +0.5% + 2 digits
- Ampmeter Range: 0— 99.99A
- Ampmeter Accuracy: +0.5% + 2 digits
- Power Requirements
- Domestic: 120VAC +10%, 60 Hz
- International: 120, 220, 230, 240 VAC, 50/60 Hz
Controls & Indicators
Refer to the PDF for details.
Installation / Setup
Refer to the PDF for details.
Operation
The B+K Precision Model 1744 and 1745 DC Power Supplies can be operated in two modes: constant voltage and constant current. The transition between these modes is automatic and smooth, with LED indicators showing whether the unit is in constant voltage (CV) or constant current (CC) mode. In constant voltage mode, a current limit can be preset, and if load variations cause the current to reach this limit, the unit will regulate the output current instead of the voltage. Current limits can be adjusted from 5% to 100% of the maximum output current. The power supply allows for connections where either polarity can be floated or grounded, and two units can be connected in series or parallel for increased voltage or current output.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Normal use of test equipment exposes users to electrical shock dangers, especially when testing where high voltage is present. A shock causing 10 milliamps through the heart can stop it, and voltages as low as 35 volts can be hazardous. Safety precautions include:
1. The power supply output itself poses little shock danger, but connecting it to external high voltage can be dangerous. Specific conditions that create shock hazards include:
a. Testing “hot chassis” equipment without unplugging or using an isolation transformer.
b. “Powered up” equipment with high voltage circuits can float power supply outputs to dangerous potentials.
c. Equipment that is off but retains high voltage in capacitors should have those capacitors discharged before testing.
2. Use a polarized 3-wire AC outlet to ensure the power supply is properly grounded, reducing shock risk.
3. Avoid unnecessary exposure to high voltage by removing housings only when needed, turning off equipment during test connections, and discharging capacitors after power removal.
Download MANUAL Manual (PDF – 1.2 MB)
Bk-precision-1745-instruction manual: troubleshoot, calibrate, and operate the device efficiently. File size: 1.2 MB.
- Brand: Bk-precision-1745-instruction
- Model: MANUAL
- Type: Manual
- File size: 1.2 MB
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-1745-instruction MANUAL Overview
The Bk-precision-1745 is a versatile digital multimeter designed for accurate electrical measurements in both professional and hobbyist environments. 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, appliances, and electrical systems.
Main Features and Specifications
- Measurement Functions: AC/DC Voltage, AC/DC Current, Resistance, Continuity, Diode Test
- Display: Large backlit LCD with auto-ranging capability
- Accuracy: High precision with up to 0.5% basic DC voltage accuracy
- Data Hold Function: Freeze displayed readings for easy recording
- Auto Power Off: Conserves battery life during inactivity
- Input Protection: Safeguards against overload and incorrect connections
- Battery Operated: Uses standard 9V battery for portability
Basic Usage and Operation Tips
Before using the Bk-precision-1745, ensure the test leads are properly connected to the correct input jacks. Select the desired measurement mode using the rotary dial. For voltage measurements, connect the test probes across the component or circuit points. When measuring current, always connect the meter in series with the circuit. Use the data hold button to freeze readings for easier observation. Always start with the highest range setting if unsure of the expected measurement to prevent damage.
Troubleshooting and Maintenance
If the display shows erratic readings or no response, check the battery and replace it if necessary. Ensure the test leads are intact and properly connected. Clean the meter and probes regularly with a dry cloth to maintain accuracy. Avoid exposing the device to moisture or extreme temperatures. If the meter fails to operate correctly after troubleshooting, consult the manual for detailed service instructions or contact authorized service centers.
Safety Reminder
Always observe proper safety precautions when working with electrical equipment. Do not exceed the maximum input limits specified in the manual. Avoid measuring voltage or current on live circuits without proper insulation and protective gear. Disconnect power sources before testing resistance or continuity. Failure to follow safety guidelines may result in electric shock, injury, or damage to the device.