The B & K Model 2902 Instruction Manual provides detailed guidance on the setup, operation, and troubleshooting of the Substitution Master, which includes a range of carbon resistors, wirewound resistors, capacitors, and a rectifier. It explains how to independently or simultaneously use different components, select and connect resistors and capacitors, and configure the device as a filtered DC power supply, while also offering features like surge protection and overload indicators to prevent damage during testing.
Manual Overview
The B & K Model 2902 Substitution Master is a versatile tool designed for technicians to streamline troubleshooting and repairs by providing a comprehensive selection of components. It includes a full range of carbon and wirewound resistors, disc and tubular capacitors, and both high and low voltage electrolytic capacitors. Each section can function independently or in combination, allowing for simultaneous substitution of multiple components. The manual details the process for selecting and substituting resistors and capacitors, emphasizing the importance of removing power from circuits before substitution. It also provides guidance on using the rectifier for DC output and configuring the Model 2902 as a filtered DC power supply. The manual includes specific instructions for setting up the device, such as connecting test leads and using the selector switches. Additionally, it highlights the surge protection features to prevent damage during testing. The manual ensures technicians can effectively use the Model 2902 to diagnose and resolve issues efficiently.
Quick Issues Covered
- Diagnose power-up failures using Model 2902's substitution features.
- Identify error codes related to capacitor overload protection.
- Use schematics for circuit tracing and component substitution.
Overview
The B & K “Substitution Master,” Model 2902, is a piece of test equipment that offers a comprehensive range of components including carbon resistors, wirewound resistors, tubular and disc capacitors, a rectifier, and both high and low voltage electrolytic capacitors. It is designed to save time by providing these components for substitution in testing and troubleshooting. The manual covers the operation and selection of these components, including instructions for using resistors and capacitors, connecting the model as a power supply, and utilizing the rectifier. The product emphasizes dependability, accuracy, and ease of operation, with features to prevent human error and enhance service speed.
Specifications
- CARBON RESISTORS:
- 1 Watt, 10%, 5NY (RXI) 10, 22, 47, 68, 100, 220, 470, 680, 1K, 2.2K, 4.7K, 6.8K.
- 1/4 Watt, 1%, 350Y (RXIK) 10K, 22K, 47K, 68K, 100K, 220K, 470K, 680K, 1 Meg, 2.2Meg, 6.8Meg.
- WIREWOUND RESISTORS:
- 20 Watt, 10% (RXI) 2.5, 5, 7.5, 10, 15, 25, 75, 100, 150 ohms.
- 15 Watt, 10% (RX100) 250, 500, 750, 1K, 1.5K, 2.5K, 5K, 7.5K, 10K, 15K.
- DISC/TUBULAR CAPACITORS:
- 500 Volt, 10% Disc .0001, .0005, .001, .0025, .005, .01 mfd.
- 600 Volt, 10% Tubular .025, .05, .1, .25, .5 mfd.
- RECTIFIER:
- .5A, 600 PIV Silicon.
- ELECTROLYTIC CAPACITORS:
- 450 Volt (+100-20%) Selection A 2, 5, 10, 20, 50, 100, 200 mfd.
- Selection B 3, 7, 15, 35, 60, 140, 350 mfd.
- 750 Volt (+80-20%) Selection A 500, 1000, 2000 mfd.
- Selection B 500, 1500, 3500 mfd.
Controls & Indicators
Refer to the PDF for details.
Installation / Setup
Refer to the PDF for details.
Operation
The operation of the B & K “Substitution Master,” Model 2902, involves several steps for selecting and using different components. For carbon resistor selection, connect the black test lead to the COM jack and the red test lead to the RX1 jack for 1-watt resistors ranging from 10 ohms to 6,800 ohms. Select the required value on the carbon resistors rotary switch, remove power from the circuit before substituting the resistor, connect test leads to the circuit, and reapply power. For 1/4 watt resistors from 10K ohms to 6.8 megohms, remove the red test lead from the RX1 jack and insert it into the RX1K jack, remembering to multiply values selected by 1000 when connected to the RX1K jack.
For power resistor selection, the process is similar to carbon resistor selection, but using the power resistor selector switch and power resistor jacks. Multiply by 100 when using RX100. The power resistor wattage rating is specified as 15 watts and 20 watts on the front panel adjacent to the power resistor jacks. Some resistors are switched in series and some in parallel to maximize wattage dissipation, as indicated in the Power Resistor Maximum Ratings Chart.
For disc/tubular capacitor selection, connect the black test lead to the COM jack and the red test lead to the CAP jack. Make the selection on the selector switch located directly above the CAP jack and connect test leads to the circuit where substitution is to be made.
For rectifier connections, connect the red test lead between the AC input and the RECT jack (anode) for a positive output, and the black test lead to the COM jack for positive rectified DC output voltage. The rectifier can be connected in series with a resistor to operate as a positive or negative peak clipper if required.
To connect the Model 2902 as a filtered DC power supply, make connections between the various sections as shown in Figure 1. For single electrolytic selection, select the required value from either the inner A or outer B range on the electrolytic capacitor selection switch, set the switch at this value, and insert the test leads into the COM jack and the red jack labeled A on the left. Ensure the Surge Protector switch is fully to the left, connect the leads to the circuit for substitution, and observe polarity. If the warning light does not glow, slide the Surge Protector switch to the right to place a resistor in series with the electrolytic to prevent arcing or accidental healing. When the switch is fully to the right, the resistor is removed, and the capacitor is connected directly.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Refer to the PDF for details.
Download MANUAL Manual (PDF – 740.0 KB)
Bk-precision-2902-instruction manual: Guide for technicians to troubleshoot and calibrate the Bk-precision 2902 model.
- Brand: Bk-precision-2902-instruction
- Model: MANUAL
- Type: Manual
- File size: 740.0 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-2902-instruction MANUAL Overview
The Bk-precision-2902 is a versatile dual-channel DC power supply designed for laboratory, educational, and industrial applications. It provides precise and stable voltage and current outputs, making it ideal for testing, prototyping, and troubleshooting electronic circuits. With its intuitive interface and robust build, the Bk-precision-2902 ensures reliable performance for both beginners and professionals.
Main Features and Specifications
- Dual output channels with independent voltage and current controls
- Output voltage range: 0-30V DC per channel
- Maximum current output: 3A per channel
- High-resolution LED display for voltage and current readings
- Overvoltage, overcurrent, and thermal protection
- Compact and durable design suitable for bench-top use
- Fine and coarse adjustment knobs for precise control
Basic Usage and Operation Tips
Before powering on the device, connect the output terminals to your circuit ensuring correct polarity. Use the coarse adjustment knob to set an approximate voltage or current, then fine-tune with the fine adjustment knob for precise output. Always start with the voltage and current limits set low and gradually increase to avoid damaging your circuit. Monitor the LED displays to verify output values during operation.
Troubleshooting and Maintenance
If the output is unstable or not as expected, verify all cable connections and ensure the load is within the specified limits. Check for any blown fuses or tripped protection features. Regularly clean the exterior with a dry cloth and ensure ventilation slots are free from dust to prevent overheating. If issues persist, consult the detailed troubleshooting section in the manual or contact authorized service centers.
Safety Reminder
Always operate the Bk-precision-2902 on a stable, dry surface away from moisture. Avoid touching output terminals while the device is powered on to prevent electric shock. Do not exceed the rated voltage and current limits. Disconnect the power supply before making any wiring changes or maintenance to ensure user safety.