The manual for B&K Precision Models 1653 and 1655 covers the setup, operation, and troubleshooting of isolated-variable AC power supplies, including safety precautions for handling high voltage equipment. It provides detailed instructions on using the power supplies for various applications such as isolation transformer usage, variable AC voltage sourcing, electrical load measurement, and power line leakage testing, along with maintenance and calibration guidelines.
Manual Overview
The B&K Precision Models 1653 and 1655 are isolated, variable AC power supplies designed for safe servicing of “hot chassis” equipment. The manual emphasizes safety precautions, such as using a polarized 3-wire AC outlet and avoiding simultaneous connections of “hot chassis” equipment to isolated outputs to prevent shock hazards. The troubleshooting section guides technicians in using the power supply as an isolation transformer, variable AC voltage source, and for electrical load measurement. Calibration adjustments and performance tests are detailed, ensuring accurate operation. The manual provides board-level guidance for fuse and auto-transformer brush replacement. Error diagnostics focus on meter accuracy and overload protection, with the Model 1655 featuring expanded leakage scale and soldering iron temperature control. Both models offer a voltage range of 0-150 VAC and current capabilities, with Model 1655 supporting up to 4 amps intermittently. The manual includes maintenance procedures and warranty information, highlighting the importance of regular checks and safe operation practices.
Quick Issues Covered
- Diagnose power-up failures with isolated AC power supply.
- Calibrate voltage adjustments for Models 1653 and 1655.
- Trace circuits using detailed schematics for troubleshooting.
Overview
The B & K-Precision Models 1653 and 1655 are isolated-variable AC power supplies designed for use by qualified electronics technicians. These instruments provide a high voltage AC source with features such as a wide voltage range, wide current range, and wide load measurement capability. The Model 1655 offers additional features like a power line leakage test and expanded leakage scale. Both models include built-in meters, isolated output voltage, and circuit breaker overload protection. The manual covers safety precautions, specifications, operating instructions, maintenance, and warranty information.
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).
- Model 1653: 2 A continuous (0-130 V).
- METER SCALES
- Model 1655: Voltages 50-150 V, Current 0-2 A, Volt-Amps 0-240 VA, Leakage 0-5 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
Refer to the PDF for details.
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 a serious shock hazard. An electrical shock with 10 milliamps of current through the heart can be fatal. Voltage as low as 35 volts dc or ac rms is dangerous and can produce a lethal current. Avoid exposing high voltage needlessly and only remove housings and covers when necessary. Turn off equipment while making test connections in high-voltage circuits and discharge high-voltage capacitors after removing power. Familiarize yourself with the equipment being tested and the location of its high voltage points. Use an insulated floor material or a large, insulated floor mat to stand on, and an insulated work surface. Avoid damp or wet surfaces. Use the “one hand in the pocket” technique while handling an instrument probe and avoid contacting nearby metal objects. Remember that ac line voltage is usually present on some power input circuits whenever the equipment is connected to an ac outlet, even if turned off. Never work alone; someone should be nearby to render aid if necessary. Training in CPR first aid is highly recommended.
Download MANUAL Manual (PDF – 1.1 MB)
Bk-precision-1655-instruction manual: Guides technicians in troubleshooting and calibrating the model 1655. PDF size: 1.1 MB.
- Brand: Bk-precision-1655-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-1655-instruction MANUAL Overview
The Bk-precision-1655 is a versatile digital multimeter designed for accurate electrical measurements in both professional and hobbyist environments. This device allows users to measure voltage, current, resistance, and continuity with high precision, making it ideal for troubleshooting, testing, and repairing electronic circuits and equipment.
Main Features and Specifications
- Measurement Functions: AC/DC Voltage, AC/DC Current, Resistance, Continuity, Diode Test
- Display: Large backlit LCD with clear digital readout
- Auto and Manual Range Selection for flexible measurement options
- Data Hold and Max/Min recording capabilities
- Input Protection: Overload protection on all ranges
- Battery Powered: Long-lasting battery for extended use
- Compact and ergonomic design for comfortable handling
Basic Usage and Operation Tips
Before using the Bk-precision-1655, ensure the device is powered on and properly calibrated. Select the appropriate measurement mode using the rotary switch. Connect the test leads to the correct terminals and the circuit under test. For voltage measurements, use parallel connection; for current, connect in series. Always start with the highest range to prevent damage and switch to a lower range for more precise readings. Use the data hold function to freeze the displayed value for easier reading.
Troubleshooting and Maintenance
If the multimeter displays erratic readings or fails to power on, check the battery and replace it if necessary. Ensure test leads are intact and properly connected. Clean the device regularly with a dry cloth and avoid exposure to moisture or extreme temperatures. If the device shows overload or out-of-range indicators frequently, verify the measurement settings and test connections. For persistent issues, consult the full manual or contact authorized service centers.
Safety Reminder
Always observe safety precautions when using the Bk-precision-1655. Do not exceed the maximum input limits to avoid electric shock or damage. Use insulated test leads and avoid measuring live circuits without proper protective equipment. Disconnect power before changing test setups and never operate the device in wet or explosive environments. Proper handling ensures your safety and prolongs the life of the multimeter.