The manual for the B&K Precision Models 1653 and 1655 covers setup and operation instructions for using the isolated-variable AC power supply, including safety precautions, controls, and indicators. It also provides troubleshooting guidance for using the power supply as an isolation transformer, variable AC voltage source, and for electrical load measurement, along with maintenance and calibration procedures.
Manual Overview
The B&K Precision Models 1653 and 1655 are isolated-variable AC power supplies designed for safe servicing of “hot chassis” equipment. They feature a built-in isolation transformer, with Model 1655 offering two isolated outlets for added convenience. Both models provide a wide voltage range of 0-150 VAC and a current range of up to 3 amps continuous for Model 1655 and 2 amps for Model 1653. The manual emphasizes safety precautions, such as using a polarized 3-wire AC outlet and avoiding simultaneous connections of “hot chassis” equipment to prevent shock hazards. Troubleshooting guidance includes using the power supply as an isolation transformer, a variable AC voltage source, and for electrical load measurement. Calibration adjustments and performance tests are detailed, with specific instructions for fuse replacement and auto-transformer brush replacement. The manual also covers the use of the Model 1655 as a leakage tester, providing OSHA, UL, and CSA power line leakage test capability.
Quick Issues Covered
- Diagnose power-up failures with isolated output voltage checks.
- Calibrate voltage adjustment range from 0-150 VAC accurately.
- Trace circuits using detailed schematics for Models 1653 and 1655.
Overview
The product is the B&K Precision Models 1653 and 1655, which are isolated-variable AC power supplies. These instruments are designed for use by qualified electronics technicians to safely service “hot chassis” equipment. The manual covers test instrument safety, features, specifications, controls and indicators, operating instructions, maintenance and calibration, troubleshooting, and warranty information. The Models 1653 and 1655 provide a wide voltage and current range, built-in meters, isolated output voltage, and soldering iron temperature control. The Model 1655 includes additional features such as power line leakage test capability and expanded leakage scale.
Specifications
- OUTPUT ISOLATION
- Leakage less than 0.1 mA (25° C, 50% relative humidity).
- VOLTAGE ADJUSTMENT RANGE
- 0-150 VAC, with input at 120 VAC.
- VOLTAGE/CURRENT SENSING
- Sine wave average, calibrated in RMS.
- MAXIMUM CURRENT (isolated)
- Model 1655: 3 A continuous, 4 A intermittent (0-130 V). Intermittent not to exceed 4 minutes at 4 A followed by 5 minutes at 1 A max.
- Model 1653: 2 A continuous (0-130 V).
- METER SCALES
- Model 1655: Voltages: 50-150 V. Current: 0-2 A. Volt-Amps (Voltage Set to 120): 0-240 VA. Leakage: 0 to 5 mA (5,000 uA), expanded scale.
- Model 1653: Voltages: 0-150 V. Current: 0-2 A.
- METER ACCURACY (25° C)
- Volts: ±5% of full scale (calibrated @ 120 VAC).
- Current: ±5% of full scale.
- Leakage: ±5% @ 500 uA.
- INPUT POWER
- Model 1655: 120 VAC ±10%, 60 Hz, 600 VA.
- Model 1653: 120 VAC ±10%, 60 Hz, 300 VA.
- OPERATING TEMPERATURE RANGE
- 0° C to +40° C.
- STORAGE TEMPERATURE
- -30° C to +60° C.
- WEIGHT
- Model 1655: 22 lb (10 kg).
- Model 1653: 12 lb (5.5 kg).
- DIMENSIONS (WxHxD)
- Model 1655: 12" x 6" x 11" (305 x 152 x 280 mm).
- Model 1653: 8-1/2 x 3-3/4 x 8" (216 x 95 x 203 mm).
- PEAK CURRENT (inrush)
- 30 A max (inrush limited to one cycle at 30 A).
- SOLDER IRON TEMPERATURE CONTROL
- 70% – 99% of power line (100 W max).
Controls & Indicators
The source does not provide information on the front-panel controls/indicators.
Installation / Setup
Refer to the PDF for details.
Operation
Refer to the PDF for details.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Never connect two pieces of “hot chassis” equipment to ISOLATED OUTPUT outlets simultaneously to avoid serious shock hazards. Voltage as low as 35 volts dc or ac rms can be dangerous and potentially lethal. Always turn off equipment when making test connections in high-voltage circuits and discharge high-voltage capacitors after removing power. Use insulated floor material or a large, insulated floor mat, and an insulated work surface. Employ the “one hand in the pocket” technique when handling an instrument probe. Be aware that ac line voltage may be present on some circuits even if the equipment is turned off. Never work alone; someone should be nearby to render aid if necessary. Training in CPR is highly recommended.
Download MANUAL Manual (PDF – 1.1 MB)
Bk-precision-1653-instruction manual: Assist technicians in troubleshooting and calibrating the Bk-precision 1653 model. File size: 1.1 MB.
- Brand: Bk-precision-1653-instruction
- Model: MANUAL
- Type: Manual
- File size: 1.1 MB
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-1653-instruction Overview
The Bk-precision-1653 is a versatile digital multimeter designed for accurate electrical measurements in both professional and hobbyist environments. It provides precise readings of voltage, current, resistance, and continuity, making it an essential tool for troubleshooting, testing, and repairing electronic circuits and electrical systems.
Main Features and Specifications
- Large backlit LCD display for easy reading in low light conditions
- Measurement ranges: AC/DC voltage up to 600V, current up to 10A, resistance up to 40MΩ
- Auto-ranging functionality for quick and accurate measurements
- Data hold and relative measurement modes
- Continuity buzzer and diode test capabilities
- Overload protection on all ranges
- Compact, ergonomic design with a durable casing
- Powered by standard 9V battery with low battery indicator
Basic Usage and Operation Tips
Before using the Bk-precision-1653, ensure the device is properly calibrated and the battery is sufficiently charged. Select the correct measurement mode and range for your application. Always connect the test leads securely to the input terminals and the circuit under test. Use the data hold feature to freeze readings for easier documentation. When measuring current, ensure the test leads are connected in series with the circuit to avoid damage to the device.
Troubleshooting and Maintenance
If the multimeter displays erratic readings or fails to power on, check and replace the battery if necessary. Inspect test leads for any damage or wear and replace them if faulty. Clean the device with a soft, dry cloth; avoid using solvents or abrasive materials. Store the multimeter in a dry, dust-free environment to prolong its lifespan. If problems persist, refer to the full manual PDF for detailed troubleshooting steps or contact customer support.
Safety Reminder
Always observe proper safety precautions when using the Bk-precision-1653. Do not exceed the specified input limits to prevent electric shock or damage. Avoid measuring live circuits with damaged test leads or without proper insulation. Disconnect power before testing resistance or continuity. Use caution when working near high voltages and follow all local electrical safety regulations.