The manual for B&K Precision programmable DC power supplies models 1785, 1786, and 1787 covers setup and operation instructions, including general and standard operation modes, as well as precautions for use and the use of a PC interface. It also provides troubleshooting guidance, such as handling over-voltage protection and error messages, and includes specifications for each model.
Manual Overview
The B&K Precision programmable DC power supplies, models 1785, 1786, and 1787, are equipped with a micro-controller for precise digital operation and analog output control, ensuring clean and quiet performance. These units feature a self-diagnostic routine upon startup, displaying a countdown from zero to nine on both the voltmeter and ammeter displays. They operate in either constant voltage (CV) or constant current (CC) mode, indicated by the respective display. The units include an over-voltage protection (OVP) feature that cuts power and displays an AE-Err warning if the output exceeds the set value. Users can set voltage and current levels manually or through pre-set programming, which allows storage of up to nine configurations. Error messages guide users to re-enter values if settings exceed the unit’s capabilities. For persistent issues, the manual advises returning the unit to an authorized service center. Calibration and adjustments are facilitated through a keypad, and an optional RS-232 interface allows for PC connectivity. The manual emphasizes the importance of reading the instructions thoroughly to maximize the benefits of the power supply.
Quick Issues Covered
- Diagnose power-up failures with start-up self-diagnostic routine.
- Resolve OVP-triggered power cuts with AE-Err warning.
- Program and store voltage/current settings using pre-set feature.
Overview
This product is a high-quality micro-controller based DC power supply with models 1785, 1786, and 1787. It features a digital operation control and an analog output control, combining the advantages of digital systems with the clean supply and quiet operation of analog systems. The power supply offers 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. It emphasizes the importance of reading the manual fully to gain the greatest benefit from the instrument.
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 User Manual
- 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 for 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: For input and programming.
10. Serial Port: Port for optional PC interface.
11. Main Cable: Power connection.
12. Fuse: Provides overcurrent protection.
Installation / Setup
Refer to the PDF for details.
Operation
After 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, assuming the voltage and ampere settings from the previous power down. It maintains either the maximum set voltage or current, indicated by the illumination of the C.V. (constant voltage) or C.C. (constant current) indicator. The unit features built-in over-voltage protection (O.V.P.), which cuts power delivery and displays an AE-Err warning if the voltage exceeds the set value. To resume normal operation after this warning, switch the unit off, remove all loadings, and switch it back on. If the issue persists, the unit should be serviced.
In standard operation mode, the unit maintains set voltage and current until reprogrammed. Settings can be adjusted manually or using a pre-set feature. For manual operation, press ‘ENTER’ to set voltage and current, using the keypad to input values. If an error occurs due to values outside the unit’s capability, re-enter the correct values. The unit stores nine pre-programmed settings, retained even when switched off. To program pre-sets, use the ‘PROG’ key, input the location, set voltage and current, and press ‘ENTER’ to save.
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-1787-instruction manual: Guide for technicians to troubleshoot and calibrate the Bk-precision 1787 model. File size: 447.2 KB.
- Brand: Bk-precision-1787-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-1787-instruction Overview
The Bk-precision-1787 is a versatile digital multimeter designed for accurate electrical measurements in both professional and hobbyist environments. This device provides reliable readings of voltage, current, resistance, and continuity, making it essential for troubleshooting and testing electrical circuits and components.
Main Features and Specifications
- Measurement Functions: AC/DC Voltage, AC/DC Current, Resistance, Continuity, Diode Test
- Display: Large backlit LCD for easy reading in low-light conditions
- Auto-ranging capability for quick and precise measurements
- Data Hold function to freeze measurement values on the display
- Overload protection on all ranges to ensure device safety
- Compact and ergonomic design for comfortable handheld use
- Battery-powered with low battery indicator
Basic Usage and Operation Tips
Before using the Bk-precision-1787, ensure the device is powered on and the correct measurement mode is selected. Connect the test leads to the appropriate input jacks and touch the probes to the circuit or component under test. Use the auto-ranging feature to simplify measurements, or manually select ranges for more control. Always start with the highest range if unsure of the expected measurement to avoid damage.
Troubleshooting and Maintenance
If the device displays erratic readings or does not power on, check the battery and replace it if necessary. Inspect test leads for damage or wear and replace if faulty. Clean the device regularly with a dry cloth and avoid exposure to moisture or extreme temperatures. If the multimeter fails to function properly after these checks, consult the service center or refer to the detailed manual PDF for further troubleshooting steps.
Safety Reminder
Always observe proper safety precautions when using the Bk-precision-1787. Avoid measuring voltages beyond the specified limits and never touch exposed metal parts during measurement. Use insulated test leads and wear appropriate personal protective equipment when working with high voltages or currents. Disconnect power sources before testing resistance or continuity to prevent damage and ensure user safety.