The manual for the Model 520 Transistor Tester covers setup and operation procedures for testing transistors and diodes both in-circuit and out-of-circuit, using a high current, low duty-cycle pulse technique. It also provides troubleshooting guidance, including identifying device types and measuring leakage currents, with features such as audible tones and LED indicators to assist in the testing process.
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 tester employs a high current, low duty-cycle pulse technique, allowing for effective in-circuit testing without the need to identify device terminals. Troubleshooting involves connecting test leads to the device and using a six-position test switch to determine device functionality, with an audible tone indicating a good device. If a device tests bad in-circuit, it should be verified by testing out-of-circuit. Calibration and service instructions are provided to ensure accurate measurements, including reverse leakage and gate leakage for FETs. The manual also includes board-level guidance for identifying device types and polarities using color-coded indicators and lamps. For hands-free testing, the manual suggests using the “hands off” method or the optional Dynaflex FP-5 probe. Error diagnostics are simplified with automatic polarity and material identification, enhancing the efficiency of testing procedures.
Quick Issues Covered
- Diagnoses transistor faults using in-circuit and out-of-circuit tests.
- Calibrates leakage meter for accurate current measurement.
- Includes schematics for effective 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 for testing transistors amidst shunting circuitry without needing to identify the device terminals. The tester is user-friendly, requiring minimal control manipulation, and includes a patented limited-energy pulse circuit for safe in-circuit testing. The device is equipped with a six-position test switch, an audible tone for indicating a good device, and a logarithmic leakage meter. It can identify NPN or PNP transistors, as well as silicon or germanium types, and measures various parameters like reverse leakage current. The manual covers specifications, 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 3.14"
- Weight: 5 lbs.
Controls & Indicators
The front-panel controls and indicators for 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 that selects additional tests such as ICES or IBES for transistors, and Ipss and gate leakage for FETs. It also identifies device material (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: Signals when a device is good.
Installation / Setup
The setup for the Model 520 Transistor Tester includes plugging the line cord into a power outlet and turning on the power switch. When testing in-circuit, ensure all power is turned off and capacitors are discharged. For in-circuit testing of transistors or FETs, connect the three test leads to the device’s leads and move the test switch through its six positions until a tone is heard, indicating a good device. If the device tests bad, verify by removing it from the circuit and retesting. For diodes, connect the blue and yellow leads across the diode and test for leakage in specific positions of the test switch. The “hands off” testing method allows for testing multiple transistors in a circuit by identifying the base lead and using the audible tone to indicate a good device.
Operation
The Model 520 Transistor Tester is used for in-circuit and out-of-circuit testing of transistors, diodes, FETs, and SCRs. For in-circuit testing, ensure all power is off and capacitors are discharged. Connect the 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 no tone is heard, the device may be defective. For diodes, connect leads across the diode and test for leakage. The “hands off” method allows testing multiple transistors by identifying the base lead and using the audible tone for good devices.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Refer to the PDF for details.
Download MANUAL Manual (PDF – 701.1 KB)
Bk-precision-520-instruction manual: assists technicians in troubleshooting and calibrating the Bk-precision-520 model. File size: 701.1 KB.
- Brand: Bk-precision-520-instruction
- Model: MANUAL
- 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-520-instruction MANUAL Overview
The Bk-precision-520 is a versatile precision measuring instrument designed for accurate electrical testing and diagnostic applications. Ideal for both professional technicians and hobbyists, this device provides reliable measurements for voltage, current, resistance, and continuity checks. Its robust design and user-friendly interface make it an essential tool for troubleshooting electrical circuits and performing routine maintenance.
Main Features and Specifications
- Measurement Types: AC/DC Voltage, AC/DC Current, Resistance, Continuity
- Display: Large backlit LCD with clear readouts
- Accuracy: High precision with ±0.5% accuracy rating
- Input Protection: Overload protection to safeguard the device
- Auto-ranging capability for ease of use
- Data Hold function to freeze readings on the display
- Compact and durable housing for field use
- Battery operated with low battery indicator
Basic Usage and Operation Tips
Before use, ensure the device is properly calibrated and the battery is sufficiently charged. Select the appropriate measurement mode using the rotary switch. Connect the test leads securely to the device and the circuit under test. For voltage measurements, connect the leads in parallel with the circuit; for current, connect in series. Always start with the highest range if unsure of the expected measurement to prevent damage. Use the Data Hold button to capture and review readings easily.
Troubleshooting and Maintenance
If the device does not power on, check and replace the batteries as needed. Ensure test leads are intact and properly connected. In case of erratic readings, verify probe contact and inspect for any visible damage. Clean the device regularly with a soft, dry cloth; avoid using harsh chemicals. Store the instrument in a dry, dust-free environment to prolong its lifespan. For calibration or repair, contact authorized service centers.
Safety Reminder
Always observe standard electrical safety precautions when using the Bk-precision-520. Do not exceed the maximum input limits specified in the manual. Avoid contact with live circuits whenever possible and use insulated test leads. Disconnect power before changing measurement modes or test leads. Properly dispose of batteries and avoid exposure to moisture to prevent electric shock or damage.