The manual for the 1689 and 1690 DC Regulated Power Supplies provides detailed instructions on setup, operation, and troubleshooting, emphasizing the importance of proper grounding, avoiding high humidity or dusty areas, and ensuring the unit is not overloaded to prevent damage. It includes safety precautions, features like overload protection and variable output, and instructions for connecting and operating the unit safely with various equipment.
Manual Overview
The Bk 1689 and 1690 DC Regulated Power Supplies are designed for use with DC-operated radio equipment, providing a variable voltage output from 1V to 15V and a maximum current of 28A at 13.8V. The units feature overload protection, indicated by an overload light, which activates a current foldback circuit to prevent damage. If activated, users should immediately switch off the unit and disconnect the load. The power supplies include high RFI stability and a temperature-sensitive variable speed cooling fan for efficient operation. For installation, ensure proper grounding and avoid placing the unit in high humidity or dusty areas. The units have multiple DC output terminals, including two pairs of 3A snap-in connections and a 28A screw-on terminal. Calibration involves adjusting the voltage using the voltage adjustment knob, with a one-touch 13.8V setting available. For troubleshooting, users should not replace the fuse without identifying the cause of the issue and should never operate the unit if damaged or if foreign materials have entered.
Quick Issues Covered
- Diagnose overload with indicator light activation on Bk 1689/1690.
- Error tracing via schematic for voltage regulation issues.
- Calibrate output voltage using adjustment knob for precise settings.
Overview
The 1689 and 1690 DC Regulated Power Supplies are designed to provide a variable voltage output from 1V to 15V with a continuous current of up to 28A at 13.8V. They are suitable for a variety of uses, particularly for DC-operated radio equipment. The units include features such as overload protection, high RFI stability, a variable speed cooling fan, and multiple DC output terminals. The manual covers safety precautions, installation, connection, and operation instructions to ensure proper use and prevent damage to the unit.
Specifications
- OUTPUT VOLTAGE DC 1-15V Variable
- OUTPUT CURRENT 28A (at 13.8V/)
- RIPPLE & NOISE smvV (peak to peak)
- LINE REGULATION 5mvV (+2% Load)
- LOAD REGULATION SOmV (0-100% Load)
- POWER SOURCE 120V / 60Hz
- VOLTMETER TYPE Precision Analog Digital LED
- AMMETER TYPE Precision Analog Digital LED
- COOLING FAN Temperature Sensitive Variable Speed Cooling Fan
- DIMENSION (WxHxD) 9.84" x 5.5" x 8.86" (250mm x 140mm x 225mm)
- WEIGHT 19.9 Ibs. (9 Kg)
- ACCESSORIES User Manual
Controls & Indicators
The front-panel controls and indicators include:
– Power Switch: Switches the unit on or off.
– Power LED: Lights up when the unit is turned on.
– Meter: Indicates current and voltage.
– Overload Indicator: Lights up when the overload protection circuit is activated.
– Voltage Adjustment Knob: Adjusts the output voltage from 1-15V, with a one-touch 13.8V setting at the clicking point.
– 3A Output Terminal: Two pairs of easy snap-in output terminals for 3A maximum output, with red as positive (+) and black as negative (-).
– 28A Output Terminal: Screw-on high capacity output terminal, with red as positive (+) and black as negative (-).
Installation / Setup
Ensure the unit is properly grounded to prevent electric shock from high voltage caused by leakage or lightning. Do not place the unit in high humidity, dusty, or sunny areas. Place the unit in a location that allows free air circulation and do not place it close to TV sets or CRT monitors. Connect the unit directly to an AC outlet, as using distribution cables may heat plugs and cables. The unit should be placed horizontally for accurate meter readings.
Operation
The operation of the 1689 and 1690 DC Regulated Power Supplies involves the following steps:
1. Ensure the unit is turned off.
2. Verify that the AC power source matches the unit’s labeled input voltage.
3. Plug the unit into an AC outlet.
4. Turn on the unit and adjust the output voltage to match the input voltage of the equipment, then turn off the unit.
5. Make sure the equipment is turned off.
6. Connect the red (+) output terminal of the unit to the positive polarity input of the equipment and the black (-) output terminal to the negative polarity input.
7. First, turn on the power supply, then turn on the equipment.
8. When the operation is over, turn off the equipment first, then turn off the unit.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Do not use the unit for equipment requiring higher current than it can provide. Avoid using it for equipment with high start-up current, such as lamps and motorized equipment, to prevent damage. Determine the cause before replacing a blown fuse and use the correct value. Never remove the metal cover while AC power is connected, touch the power supply with wet hands, or operate it if foreign materials have entered. Do not use a damaged unit as it may have disabled voltage regulation circuitry. Avoid letting foreign objects touch the DC Power Output terminals. Allow the unit to cool before inspecting its interior. Ensure proper grounding to prevent electric shock. Avoid placing the unit in high humidity, dusty, or sunny areas, and ensure free air circulation. Do not place it near TV sets or CRT monitors. Connect directly to an AC outlet, not through extension cords.
Download MANUAL Manual (PDF – 112.7 KB)
Bk-precision-1690-instruction manual: assists technicians in troubleshooting and calibrating the BK Precision 1690 power supply.
- Brand: Bk-precision-1690-instruction
- Model: MANUAL
- Type: Manual
- File size: 112.7 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-1690-instruction Manual Overview
The Bk-precision-1690 is a versatile and reliable digital multimeter designed for precise electrical measurements in both professional and hobbyist environments. This device offers accurate readings of voltage, current, resistance, and continuity, making it an essential tool for troubleshooting, testing, and maintaining electrical circuits and equipment.
Main Features and Specifications
- Measurement Functions: AC/DC Voltage, AC/DC Current, Resistance, Continuity, Diode Test
- Display: Large backlit LCD for clear readings in low-light conditions
- Auto-ranging capability for ease of use and accuracy
- Data Hold function to freeze readings on the display
- Overload protection to safeguard the device and user
- Compact and ergonomic design for comfortable handling
- Battery operated with low battery indicator
- Input impedance: 10MΩ for voltage measurements
Basic Usage and Operation Tips
Before using the Bk-precision-1690, ensure the device is powered on and the battery is sufficiently charged. Select the appropriate measurement mode using the rotary dial. Connect the test leads securely to the device and the circuit under test, observing correct polarity. For voltage and resistance measurements, use the appropriate input jacks as indicated in the manual. Always start with the highest range if unsure about the expected measurement to prevent damage. Utilize the Data Hold feature to capture readings for later reference.
Troubleshooting and Maintenance
If the device displays erratic or no readings, check the test leads for damage or loose connections. Replace the battery if the low battery indicator appears or if the device fails to power on. Clean the exterior with a soft, dry cloth and avoid exposure to moisture or extreme temperatures. Regularly inspect the input jacks and test leads for wear and replace them as necessary. If problems persist, consult the detailed troubleshooting section in the manual or contact authorized service centers.
Safety Reminder
Always observe safety precautions when working with electrical equipment. Do not exceed the maximum input limits specified in the manual. Avoid contact with live circuits to prevent electric shock. Use insulated test leads and wear appropriate personal protective equipment when necessary. Disconnect power from the circuit before making resistance or continuity measurements. Proper use and maintenance of the Bk-precision-1690 ensure safe and accurate operation.