The manual for B&K Precision's programmable DC power supplies models 1785, 1786, and 1787 covers setup, operation, and troubleshooting, including instructions for general and standard operation modes, using the PC interface, and precautions for use. It also provides detailed specifications, controls and indicators, and guidance on using the pre-set feature for storing voltage and current settings.
Manual Overview
The B&K Precision Models 1785, 1786, and 1787 are programmable DC power supplies designed for precision and flexibility. The manual emphasizes troubleshooting through a startup self-diagnostic routine, which involves both displays counting from zero to nine. If an over-voltage condition occurs, the built-in over-voltage protection (O.V.P.) feature will trigger, cutting power and displaying an “AE-Err” warning. If this persists, the unit should be serviced by an authorized center. Error codes appear when voltage or current settings exceed the unit’s capabilities, prompting users to re-enter valid values. Calibration involves setting voltage and current manually or using the pre-set feature, which can store up to nine configurations. The units operate in either constant voltage (C.V.) or constant current (C.C.) mode, indicated by respective displays. For board-level guidance, the manual specifies fuse types and locations, ensuring proper maintenance and safety. The RS-232 serial port option allows for PC interface, enhancing control and monitoring capabilities.
Quick Issues Covered
- Self-diagnostic routine during power-up detects initial faults.
- Displays AE-Err warning for over voltage protection activation.
- Manual and pre-set modes for voltage/current calibration.
Overview
This product is a high-quality micro-controller based DC power supply with a total supply capability of 50W. It combines digital operation control with analog output control, offering ease and accuracy along with clean supply and quiet operation. The unit includes an optional RS-232 interface for PC connectivity and control software. The manual covers specifications, controls and indicators, operating instructions, precautions for use, and using the PC interface.
Specifications
- Output (DC) 0-18V 0-30V 0-60V
- Output Current (Amp.) 5 3 1.5
- Ripple & Noise (RMS) i mV
- Line Regulation 0.02% + 5mV
- Load Regulation 0.02% + 5mV
- RS-232 Option
- Operating Voltage 110V, 60Hz (or on request 220-240V)
- Dimension (W.H.D.) 8.07 x 4.53 x 10.63 in. (205 x 115 x 270 mm)
- Accessory Supplied Wavetek Model 278
- Weight App. 11 Ibs (5 Kg)
- Display LED Voltmeter & Ammeter
- Cooling System Natural convection
- Power Consumption Approximate 220 VA / W Approximate 200 VA/W
- Operating ambient temperature 41° to 104°F (5 to 40°C) 10 – 80% R.H.
- Input fuse F5 AC100V, 110V, 120V 5x20mm 4A 250V Fast Blow
- AC220V, 230V, 240V 5x20mm 2A 250V Fast Blow
- Internal fuse F1 5x20mm 0.5A 250V Fast Blow
- Internal fuse F2 5x20mm 0.5A 250V Fast Blow
- Internal fuse F3 5x20mm 0.5A 250V Fast Blow
- Internal fuse F4 5x20mm 0.5A 250V Fast Blow
Controls & Indicators
The front-panel controls and indicators of the programmable DC power supplies include:
1. Power Switch: Turns the power supply on and off.
2. Ammeter Display: Indicates output current.
3. Voltmeter Display: Indicates output voltage.
4. Output “+” Terminal (Red): Positive polarity output terminal.
5. Output “-” Terminal (Black): Negative polarity output terminal.
6. Ground “GND” Terminal (Green): Ground terminal connected to chassis.
7. CC Display: Indicates the unit is in constant current mode.
8. CV Display: Indicates the unit is in constant voltage mode.
9. Keypad.
10. Serial Port: Port for optional PC interface.
11. Main Cable.
12. Fuse.
Installation / Setup
Refer to the PDF for details.
Operation
The manual provides detailed operating instructions for the programmable DC power supplies. Upon switching on the unit, it performs a start-up self-diagnostic routine, displaying a count from zero to nine on both displays. The unit enters standard operation mode, maintaining voltage and ampere settings from the previous power down. It operates in either constant voltage (C.V.) or constant current (C.C.) mode, indicated by illuminated indicators. The unit includes an over voltage protection (O.V.P) feature, which cuts power delivery and displays a warning if voltage exceeds set values.
In standard operation mode, settings can be adjusted manually or via a pre-set feature. For manual operation, users press ‘ENTER’ to set voltage and current levels, confirmed by pressing ‘ENTER’ again. The unit maintains these settings until reprogrammed. The pre-set feature allows storage of nine voltage and current settings, retained even when the unit is off. Programming involves selecting a pre-set location, setting voltage and current, and confirming with ‘ENTER’.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Refer to the PDF for details.
Download MANUAL Manual (PDF – 447.2 KB)
Bk-precision-1785-instruction manual: assists technicians in troubleshooting and calibrating the Bk-precision 1785 model.
- Brand: Bk-precision-1785-instruction
- Model: MANUAL
- Type: Manual
- File size: 447.2 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-1785-instruction Overview
The Bk-precision-1785 is a versatile digital multimeter designed for precise electrical measurements in both professional and hobbyist environments. This device offers accurate readings of voltage, current, resistance, and other electrical parameters, making it an essential tool for troubleshooting circuits, testing components, and performing routine maintenance on electronic equipment.
Main Features and Specifications
- Measurement Functions: AC/DC Voltage, AC/DC Current, Resistance, Capacitance, Frequency, and Temperature
- Large backlit LCD display for easy reading in low-light conditions
- Auto-ranging capability for quick and accurate measurements
- Data hold and relative measurement modes
- Overload protection on all ranges to ensure device safety
- Low battery indicator to alert users when replacement is needed
- Compact and ergonomic design for comfortable handling
- Comes with test leads, thermocouple probe, and user manual (PDF)
Basic Usage and Operation Tips
Before using the Bk-precision-1785, 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, connect the test leads in parallel or series with the circuit respectively. Use the data hold function to freeze readings for easier recording. Always start with the highest range to prevent damage and switch to a lower range for more precise readings once the approximate value is known.
Troubleshooting and Maintenance
If the device displays erratic readings or fails to power on, check the battery and replace it if necessary. Clean the test leads and connectors regularly to maintain good contact. Avoid exposing the multimeter to moisture or extreme temperatures. If the display shows “OL,” it indicates an overload condition—reduce the input to within the device’s specified range. For persistent issues, refer to the detailed troubleshooting section in the PDF manual.
Safety Reminder
Always observe safety precautions when using the Bk-precision-1785. Do not exceed the maximum input limits to avoid electric shock or damage to the device. Use insulated test leads and avoid contact with live circuits. Disconnect power before connecting or disconnecting test leads. Proper use and handling will ensure accurate measurements and prolong the lifespan of your multimeter.