The manual for the Bk Precision Model 520 Transistor Tester covers the setup and operation of the device, including in-circuit and out-of-circuit testing of transistors, diodes, and FETs, as well as instructions for using the test switch and identifying device types. It also provides troubleshooting guidance, such as verifying test results by removing devices from circuits and retesting, and includes features like audible tones for good devices and automatic polarity indication.
Manual Overview
The BK Precision Model 520 Transistor Tester manual provides detailed guidance on using the device for both in-circuit and out-of-circuit testing of transistors, diodes, and FETs. The manual emphasizes the use of a high current, low duty-cycle pulse technique for testing transistors without needing to identify device terminals, simplifying the process with minimal control manipulation. For troubleshooting, the manual outlines a step-by-step process for connecting test leads and using the six-position test switch to determine device status, indicated by an audible tone and LED indicators for device type and polarity. Error diagnostics include identifying defective devices if no tone is heard or if both test positions produce full-scale readings, suggesting possible shorting or shunting issues. Calibration and adjustment instructions are not explicitly detailed, but the manual suggests verifying test results by removing devices from circuits for retesting. Board-level guidance includes instructions for safely disconnecting components and using the optional Dynaflex FP-5 probe for hands-free testing.
Quick Issues Covered
- Diagnoses in-circuit and out-of-circuit transistor failures.
- Calibrates leakage current for silicon and germanium transistors.
- Includes schematics for circuit tracing and troubleshooting.
Overview
The Model 520 Transistor Tester, produced by Dynascan Corporation, is designed for both in-circuit and out-of-circuit testing of transistors. It features a high current, low duty-cycle pulse technique that allows for testing without needing to identify device terminals. The tester includes a patented limited-energy pulse circuit for safe in-circuit testing, a human-engineered panel design with minimal controls, and a six-position test switch for sequential testing. It provides automatic polarity indication, identification of silicon and germanium device types, and includes a logarithmic leakage meter. The device is equipped with features such as audible tones for good device indication and locking test leads for secure connections. The manual covers specifications, controls, usage instructions, calibration, and service information.
Specifications
- GOOD/BAD Test for PNP, NPN transistors, FET, SCR.
- Identifies NPN or PNP transistors.
- Identifies SILICON or GERMANIUM transistors.
- Measures Reverse LEAKAGE from 0.1uA to 5mA.
- Measures Ipss and gate leakage of FET’s.
- Collector Current: 250mA at 5% duty cycle.
- Base Current: 125mA at 5% duty cycle.
- Test Repetition Rate: 10 per second.
- Reverse Voltage for Leakage Test: 3.5V.
- Resistance: Greater than 10 ohms.
- Capacitance: Up to 5mfd with low beta devices, up to 15mfd with higher betas.
- Three test leads with mini-lock clips supplied.
- FP-5 Dynaflex Probe (optional).
- SIZE: 8×7" x 3 1/4"
- WEIGHT: 5 lbs.
Controls & Indicators
The front-panel controls and indicators of the Model 520 Transistor Tester include:
– POWER ON Switch: Applies power to the device.
– POWER ON Lamp: Indicates when the power is on.
– TEST Switch: Selects the proper device terminals for testing.
– BASE Lead Indicator: Identifies the base lead by color.
– FUNCTION Switch: A spring-return switch for selecting additional tests such as ICES or IBES for transistors, and Ipss and gate leakage for FETs. It also identifies the device material as silicon or germanium.
– LEAKAGE Meter: Indicates device leakage current and shows safe leakage limits for typical silicon and germanium transistors. It also indicates IDss and gate leakage for FETs.
– IDENTIFY Lamps: Indicate whether the device is silicon or germanium.
– NPN and PNP Lamps: Indicate the polarity of good devices.
– AUDIBLE TONE: Indicates when a device is good.
Installation / Setup
The setup for the Model 520 Transistor Tester involves ensuring that all power is turned off in the circuit being tested and that all capacitors are discharged. The line cord should be plugged into a power outlet, and the power switch should be turned on. For in-circuit testing, connect the three test leads to the device’s leads and move the test switch through its positions until a tone is heard, indicating a good device. If the device tests bad, it may need to be removed from the circuit for verification. For diodes, connect the leads across the diode and test for leakage. The “hands off” method allows for testing multiple transistors in a circuit by identifying the base lead and probing the collector and emitter leads.
Operation
The Model 520 Transistor Tester is used for both in-circuit and out-of-circuit testing of transistors, diodes, and other semiconductor devices. For in-circuit testing, ensure all power is off and capacitors are discharged. Connect the test leads to the device, move the test switch through its positions until a tone is heard, indicating a good device. If no tone is heard, the device may be defective. For out-of-circuit testing, remove the device and repeat the test. The tester identifies device polarity and material type, and measures leakage currents.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Refer to the PDF for details.
Download 2 Manual (PDF – 701.1 KB)
Bk-precision-520b-instruction-manual Model 2: Guide for technicians on troubleshooting and calibrating the device. File size: 701.1 KB.
- Brand: Bk-precision-520b-instruction-manual
- Model: 2
- Type: Manual
- File size: 701.1 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-520b-instruction-manual Overview
The Bk-precision-520b is a versatile digital multimeter designed for accurate measurement of electrical parameters in various applications. Ideal for both professional technicians and hobbyists, this device provides reliable readings of voltage, current, resistance, and continuity, making it essential for troubleshooting and testing electronic 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 and Manual Range Selection for flexible measurement options
- Data Hold Function to freeze readings on the display
- Overload Protection to safeguard the device and user
- Battery Powered with low battery indicator
- Compact and ergonomic design for ease of use and portability
Basic Usage and Operation Tips
Before using the Bk-precision-520b, ensure the device is powered on and the correct measurement mode is selected. Connect the test leads securely to the device and the circuit under test. Always start with the highest range to prevent damage and then adjust to a lower range for more precise readings. Use the data hold function to capture readings when needed. After measurements, turn off the device to conserve battery life.
Troubleshooting and Maintenance
If the multimeter displays erratic readings or no display, check the battery status and replace it if necessary. Inspect test leads for damage or wear and replace if faulty. Clean the device regularly with a dry cloth and avoid exposure to moisture or extreme temperatures. If the device fails to operate correctly after these checks, consult the detailed manual or contact technical support.
Safety Reminder
Always observe safety precautions when using the Bk-precision-520b. Avoid measuring voltages beyond the specified limits, and never touch exposed metal parts during measurements. Use insulated test leads and wear appropriate personal protective equipment. Disconnect power from circuits before testing resistance or continuity to prevent electric shock or damage to the multimeter.