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, as well as using the PC interface. It provides guidance on setting voltage and current levels, using pre-set features, and handling over-voltage protection, while also detailing the controls, indicators, and specifications of the units.
Manual Overview
The B&K Precision programmable DC power supplies, models 1785, 1786, and 1787, are designed with a microcontroller-based system for precise digital control and analog output. These units feature a self-diagnostic routine upon startup, displaying a count from zero to nine on both displays, and default to the last used voltage and current settings. Users should verify settings before connecting equipment to avoid unintended power delivery. The power supplies operate in either constant voltage (CV) or constant current (CC) mode, indicated by respective display lights. An over-voltage protection (OVP) feature triggers an AE-Err warning and halts power if voltage exceeds set limits, requiring a restart. For standard operation, users can manually set voltage and current or use the pre-set feature to store up to nine configurations, which remain saved even when the unit is powered off. Troubleshooting involves checking error codes and ensuring settings are within the unit’s capabilities. Persistent issues may require service center intervention. The units also support an optional RS-232 interface for PC connectivity.
Quick Issues Covered
- Self-diagnostic routine during power-up checks for errors.
- Displays AE-Err warning for over voltage protection activation.
- Manual and pre-set voltage/current settings for standard operation.
Overview
The product is a high-quality micro-controller-based DC power supply with a total supply capability of 50W. It combines digital operation control and analog output control, offering ease and accuracy of digital systems along with the clean supply and quiet operation of analog systems. The unit also features an optional RS-232 interface for PC connectivity. The manual covers various aspects including specifications, controls and indicators, operating instructions, and precautions for use.
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 for the programmable DC power supply models 1785, 1786, and 1787 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 (also serves as a minute indicator in program mode).
8. CV Display: Indicates the unit is in constant voltage mode (also serves as a second indicator in program mode).
9. Keypad: Used for inputting settings.
10. Serial Port: Port for optional PC interface.
11. Main Cable: Power cable for the unit.
12. Fuse: Provides overcurrent protection.
Installation / Setup
Refer to the PDF for details.
Operation
The manual provides detailed instructions for operating 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. The unit then enters standard operation mode, maintaining the 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 that cuts power if the voltage exceeds the set value, displaying an AE -Err warning.
In standard operation mode, the unit maintains set voltage and current until reprogrammed. Users can set these manually or use the pre-set feature. For manual operation, users press ‘ENTER’, set the voltage and current using the keypad, and confirm with ‘ENTER’. The pre-set feature allows storing nine pre-programmed settings, retained even when the unit is off. Programming involves selecting a pre-set location, setting voltage and current, and confirming each step 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-1786 manual helps technicians troubleshoot and calibrate the device efficiently. PDF size: 447.2 KB.
- Brand: Bk-precision-1786-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-1786-instruction MANUAL Overview
The Bk-precision-1786 is a versatile digital multimeter designed for accurate electrical measurements in both professional and hobbyist environments. This device offers reliable performance for testing voltage, current, resistance, continuity, and other electrical parameters, making it an essential tool for troubleshooting and maintenance of electronic circuits and equipment.
Main Features and Specifications
- True RMS measurement for accurate AC readings
- Wide measurement range: up to 1000V DC/AC and 10A current
- Resistance measurement up to 40MΩ
- Data hold and relative measurement functions
- Backlit LCD display for easy reading in low-light conditions
- Auto-ranging capability for convenience and precision
- Built-in overload protection to safeguard the device
- Compact and ergonomic design for comfortable handling
Basic Usage and Operation Tips
Before using the Bk-precision-1786, ensure the device is properly calibrated and the battery is sufficiently charged. Select the desired measurement mode using the rotary dial. Connect the test leads securely to the appropriate input jacks and the circuit under test. Always start with the highest range setting if unsure about the expected measurement value to prevent damage. Use the data hold function to freeze readings for easier documentation. After completing measurements, turn off the device to conserve battery life.
Troubleshooting and Maintenance
If the device displays erratic readings or fails to power on, check the battery and replace it if necessary. Inspect test leads for any visible damage or wear and replace them if faulty. Clean the device regularly with a soft, dry cloth and avoid exposure to moisture or extreme temperatures. If the multimeter exhibits persistent issues, consult the manual for detailed troubleshooting steps or contact authorized service centers.
Safety Reminder
Always observe proper safety precautions when using the Bk-precision-1786. Never exceed the maximum input limits specified in the manual. Avoid measuring live circuits with damaged test leads. Use appropriate personal protective equipment and ensure the device is set to the correct measurement mode before testing. Following these guidelines will help prevent injury and equipment damage.