The B&K Precision programmable DC power supplies manual provides detailed instructions for setup, operation, and troubleshooting, including information on general and standard operation modes, as well as how to use the pre-set feature for storing voltage and current settings. It also covers the unit's self-diagnostic routine, over-voltage protection feature, and optional RS-232 interface for PC control.
Manual Overview
The B&K Precision programmable DC power supplies models 1785A, 1786A, and 1787A are micro-controller based units with digital operation control and analog output control, providing a clean and quiet power supply. These units feature an optional RS-232 interface for PC connectivity. The manual emphasizes the importance of reading the instructions thoroughly before operation. Troubleshooting involves a start-up self-diagnostic routine where displays count from zero to nine. The unit operates in either constant voltage (CV) or constant current (CC) mode, indicated by respective displays. An over-voltage protection (OVP) feature triggers an E-Err warning if voltage exceeds set values, requiring the unit to be switched off and load removed. Persistent issues necessitate service center intervention. Calibration involves setting voltage and current manually or using pre-set features, which allow storage of up to nine configurations. Error messages appear if input values exceed the unit’s capabilities, prompting re-entry. The manual provides detailed guidance on manual operation and pre-set programming to ensure accurate and reliable performance.
Quick Issues Covered
- Diagnose E-Err warning for over voltage protection activation.
- Perform start-up self-diagnostic routine during power-up.
- Set voltage/current manually or using pre-set feature.
Overview
This product is a high-quality micro-controller-based DC power supply, available in models 1785A, 1786A, and 1787A, with a total supply capability of 90W. It combines digital operation control with analog output control, offering ease and accuracy alongside clean supply and quiet operation. The power supplies have an optional RS-232 interface for PC connectivity. The manual covers specifications, controls and indicators, general and standard operation instructions, precautions, and PC interface usage.
Specifications
- Output (DC) 0 – 18V 0 – 30V 0 – 60V
- Output Current (Amp.) 5 3 1.5
- Ripple & Noise (RMS) 1mV
- Line Regulation 0.02% + 5mV
- Load Regulation 0.02% + 5mV
- RS – 232 Option
- Operating Voltage 115/230 VAC , 50/60Hz
- 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 lbs (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 3A 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: Used for input and control.
10. Serial Port: Port for optional PC interface.
11. Main Cable: Connects the unit to power supply.
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 on both displays. The unit then enters standard operation mode, maintaining the voltage and ampere settings from the previous power down. It operates in either constant voltage (CV) or constant current (CC) mode, indicated by the respective display light.
The unit features an over-voltage protection (OVP) mechanism that triggers if the voltage exceeds the set value, cutting power delivery and displaying an E-Err warning. In such cases, the unit should be switched off, all loads removed, and then switched back on to resume normal operation. Persistent issues require returning the unit to an authorized service center.
In standard operation mode, voltage and current settings can be adjusted manually or using pre-set features. Manual operation involves pressing the ‘ENTER’ key to set voltage and current levels, with error messages appearing if settings exceed the unit’s capabilities. The pre-set feature allows storing up to nine voltage and current settings, which remain stored even when the unit is off. Pre-set programming involves selecting a location (1 to 9), setting the desired voltage and current, and confirming each with the ‘ENTER’ key.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Refer to the PDF for details.
Download MANUAL Manual (PDF – 507.6 KB)
Bk-precision-1785a manual: Guide for technicians to troubleshoot and calibrate the 1785a model. PDF size: 507.6 KB.
- Brand: Bk-precision-1785a-instruction
- Model: MANUAL
- Type: Manual
- File size: 507.6 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-1785a-instruction MANUAL Overview
The Bk-precision-1785a is a versatile digital multimeter designed for accurate measurement of electrical parameters. This device is ideal for technicians, engineers, and hobbyists who require reliable readings of voltage, current, resistance, and continuity in various electronic circuits and systems. The instruction manual provides comprehensive guidance on the proper use and maintenance of the Bk-precision-1785a to ensure optimal performance and longevity.
Main Features and Specifications
- Measurement Functions: AC/DC Voltage, AC/DC Current, Resistance, Continuity, Diode Test
- Display: Large, easy-to-read digital LCD with backlight
- Accuracy: High precision readings with auto-ranging capability
- Input Protection: Overload protection on all ranges to prevent damage
- Data Hold Function: Freeze the displayed measurement for easy recording
- Battery Powered: Long-lasting battery with low battery indicator
- Compact and Durable: Lightweight design with robust casing for field use
Basic Usage and Operation Tips
Before using the Bk-precision-1785a, ensure that the test leads are properly connected to the correct input jacks. Select the appropriate measurement mode and range for your application. When measuring voltage or current, always start with the highest range to prevent damage to the meter. Use the data hold function to freeze readings when working in difficult-to-see areas. Always disconnect power to the circuit before measuring resistance or continuity to avoid inaccurate readings or damage.
Troubleshooting and Maintenance
If the meter displays erratic readings or fails to power on, check the battery status and replace it if necessary. Inspect test leads for any visible damage or wear and replace them if needed. Keep the device clean by wiping it with a soft, dry cloth; avoid using solvents or abrasive materials. If the meter experiences persistent errors, consult the manual’s troubleshooting section or contact authorized service centers for repair.
Safety Reminder
Always observe proper safety precautions when using the Bk-precision-1785a. Do not exceed the specified input limits to prevent electric shock or damage. Use insulated test leads and avoid contact with live circuits. Disconnect the meter from the circuit before opening the battery compartment. Proper handling and adherence to safety guidelines will ensure safe and effective operation of your digital multimeter.