The manual for the Model 1791 High Current Power Supply provides detailed instructions for setup, operation, and troubleshooting, including how to adjust voltage and current settings, use remote programming, and perform initial inspections and electrical checks. It also covers installation procedures, such as bench and rack mounting, and explains the use of controls and indicators for both constant voltage and constant current modes.
Manual Overview
The Bk Model 1791 High Current Power Supply manual provides detailed guidance on troubleshooting, error diagnostics, calibration, and board-level adjustments. The power supply is designed for both bench and rack operations, offering a regulated output of 0-64V at 0-10A with continuous adjustment capabilities. It features automatic crossover between constant voltage and current modes, with output monitored by front panel meters. Troubleshooting involves initial inspection for physical and electrical integrity, ensuring no damage from transit, and verifying electrical specifications through in-cabinet checks. Error diagnostics are facilitated by digital panel meters with mode indication LEDs. Calibration involves setting voltage and current limits using front panel controls, with remote programming available via an external resistor. Remote sensing is enabled to mitigate voltage drop at the load. The unit includes automatic overload and short circuit protection. Installation requires connection to a 120V or 230V AC power source, with considerations for adequate ventilation and ambient temperature. For shipment, original packaging is recommended, with tagging for identification and fault description.
Quick Issues Covered
- Diagnose power-up failures with initial electrical checks.
- Interpret error codes for voltage/current limit settings.
- Use schematics for circuit tracing and troubleshooting.
Overview
The B&K Precision Model 1791 is a high current regulated DC power supply designed for bench or rack operation. It provides a well-regulated constant voltage or constant current output, adjustable from 0 to 64V and 0 to 10A. The unit features automatic crossover between voltage and current modes, remote programming, and remote sensing capabilities. It includes digital panel meters for monitoring output and is equipped with overload protection. The manual covers general information, specifications, installation, and operating instructions for the power supply.
Specifications
- OUTPUT VOLTAGE 0-64V DC continuously variable with coarse and fine voltage controls.
- LOAD CURRENT 0-10 Amp max., continuously variable with coarse and fine controls.
- CONSTANT VOLTAGE MODE REGULATION
- LINE Less than + 0.01% + 2mV for 410% change in line voltage.
- LOAD Less than + 0.01% + 2mV for load change from zero to full load.
- RIPPLE & NOISE Less than 1mV rms max.(20 Hz- 20 MHz)
- CONSTANT CURRENT MODE REGULATION
- LINE Less than + 0.05% +10mA for +10% change in line voltage.
- LOAD Less than 0.05% +10mA for change in output voltage from 0 volts to maximum output voltage.
- RIPPLE & NOISE Less than 3mA rms.
- OVERLOAD PROTECTION Automatic overload and short circuit protection.
- TRANSIENT RESPONSE 100usecs to within 10mV of set output voltage for load change from 10% to 90%.
- STABILITY :
- Total drift within 8 hours, after + 0.2% + 10mvV in constant voltage mode.
- warm up under constant line, + 0.5% + 10mA in constant current mode.
- load & temp.
- PANEL METERS Digital panel meters(marked V for voltmeter and A for ammeter) are provided with an accuracy of + 3 counts.
- MODE INDICATION Respective LED lights up when the unit is working in CV or CC mode.
- SET LIMIT! ON-OFF Push Switches for Limit ( V & A ) and output ON/OFF setting.
- OUTPUT CONTROLS Single turn coarse and fine voltage and current controls are provided on the front panel
- EXTERNAL PROGRAMMING Output voltage can be programmed by a variable – resistance of 20K
- OPERATING TEMPERATURE 0-40°C.
- INPUT VOLTAGE 120/230V AC, + 10% 47 – 63Hz single phase.
- DIMENSIONS 19"(W ) x 15.75"(D) x 5.24"(H).
- WEIGHT 55 Ibs.
Controls & Indicators
The front-panel controls and indicators of the Model 1791 High Current Power Supply include:
– VOLTAGE controls for limiting output voltage when used as a constant voltage source.
– CURRENT controls for limiting output current when used as a constant current source.
– Two front panel meters for continuously monitoring output voltage and current.
– Load terminals and remote sense terminals.
– OUTPUT ON/OFF switch to preset voltage and current limits without connecting to the load.
– LIMIT switch for setting voltage and current limits with the OUTPUT ON/OFF switch in the OFF position.
– A push switch on the front panel for selecting remote sensing mode.
– Digital panel meters marked V for voltmeter and A for ammeter.
– LED indicators for mode indication (CV or CC mode).
– Single turn coarse and fine voltage and current controls.
Installation / Setup
The installation highlights for the Model 1791 High Current Power Supply include the following key points:
1. Initial Inspection: Upon unpacking the unit, inspect it for any transit damage and retain all packing materials until the inspection is complete. Notify carriers and authorized representatives if damage is found.
2. Physical Check: Ensure there are no broken knobs or connectors, and check that the cabinet and panel surfaces are free of dents and scratches. Verify that the meters are not scratched or cracked.
3. Electrical Check: Perform an electrical check against specifications to verify proper operation.
4. Installation Data: The unit is ready for bench operation upon connecting to a rated power source (120V AC).
5. Location: Ensure sufficient space around the unit for fan cooling and avoid confined spaces or proximity to heat sources. The ambient temperature should be below 40°C.
6. Rack Mounting: The unit can be rack-mounted using standard screws and optional rack attachments.
7. Input Power Requirements: The unit operates continuously on 120V or 230V AC, 47-63Hz, and is factory wired for 120V AC.
8. Repackaging for Shipment: Use the original packaging for safe shipment, and attach a tag specifying the owner and any observed faults.
Operation
The 1791 High Current Power Supply operates in two main modes: Constant Voltage (CV) and Constant Current (CC). In CV mode, users can set the desired voltage using the front panel VOLTAGE controls, and the unit will maintain this voltage. In CC mode, users can set the desired current using the CURRENT controls, and the unit will maintain this current. The power supply automatically switches between CV and CC modes depending on the load conditions. The output can be preset without connecting to a load, and the OUTPUT ON/OFF switch is used to connect or disconnect the power supply from the load. Remote programming and sensing options are available for more precise control and regulation.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Refer to the PDF for details.
Download MANUAL Manual (PDF – 603.2 KB)
Bk-precision-1791-instruction manual: troubleshoot and calibrate the 1791 model efficiently. File size: 603.2 KB.
- Brand: Bk-precision-1791-instruction
- Model: MANUAL
- Type: Manual
- File size: 603.2 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-1791-instruction Overview
The Bk-precision-1791 is a versatile and reliable piece of test equipment designed for precise electrical measurements and diagnostics. Ideal for both professional technicians and hobbyists, this device offers accurate readings and robust performance for a variety of applications including circuit testing, troubleshooting, and calibration tasks.
Main Features & Specifications
- High-precision digital display for clear measurement readings
- Wide measurement range including voltage, current, and resistance
- Auto-ranging capability for ease of use and accuracy
- Data hold and max/min functions for detailed analysis
- Durable casing designed to withstand industrial environments
- Low battery indicator to ensure uninterrupted operation
- Compact and lightweight design for portability
Basic Usage & Operation Tips
Before using the Bk-precision-1791, ensure the device is properly calibrated and the batteries are fully charged. Select the appropriate measurement mode using the rotary switch, and connect the test leads securely to the device and the circuit under test. Always start with the highest range to prevent damage and adjust downwards for more precise readings. Use the data hold feature to freeze readings for easier recording. After use, turn off the device to conserve battery life.
Troubleshooting & Maintenance
If the device displays erratic readings or fails to power on, check the battery level and replace 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. For persistent issues, refer to the detailed troubleshooting section in the manual or contact authorized service centers.
Safety Reminder
Always observe proper safety precautions when using the Bk-precision-1791. Do not exceed the maximum input limits specified in the manual, and avoid contact with live circuits without proper insulation. Use the device only as intended and wear appropriate personal protective equipment when necessary to prevent electrical shock or injury.