The B & K Model PR-38 R.F. Probe manual provides instructions for setup and operation, including connecting the probe to the Model 375 VIVM and using the appropriate settings to measure sine wave voltages up to 250 mc. It also offers troubleshooting advice, such as ensuring the use of the correct ground lead to avoid inaccurate readings, and specifies the voltage limits for safe operation.
Manual Overview
The B&K Model PR-38 R.F. Probe, when used with the Model 375 VIVM, allows technicians to measure sine wave voltages at frequencies up to 250 MHz. The probe utilizes a crystal diode functioning as a half-wave rectifier to develop a DC voltage proportional to the peak value of the sine wave input signal. The calibrating resistor, R-11, converts this peak reading to an appropriate reading on the VIVM. For accurate measurements, the probe should be connected to the Model 375 with the Selector Switch set to the DC+ position, using the DC ranges on the Range Switch. The readings obtained will reflect the RMS values of the sine wave. It is crucial to use the ground lead from the R.F. Probe for grounding, as using the VIVM’s long ground lead can lead to inaccurate readings. The probe is suitable for circuits with DC voltages not exceeding 400V and AC voltages not exceeding 25V RMS. Replacement parts for the probe, such as the diode and various connectors, are available with specific part numbers for maintenance and repair.
Quick Issues Covered
- Diagnose inaccurate readings due to improper grounding techniques.
- Calibrate using R-11 resistor for accurate RMS voltage readings.
- Trace circuit using schematic for component identification and replacement.
Overview
The B & K Model PR-38 R.F. Probe is designed to work with the Model 375 VIVM to measure sine wave voltages at frequencies up to 250 mc. It uses a crystal diode as a half-wave rectifier to develop a DC voltage proportional to the peak value of the sine wave input signal. The probe is used to obtain RMS readings of sine wave signals and should be connected with the ground lead to the circuit under test for accurate readings. It is suitable for circuits with DC voltages not exceeding 400V and AC voltages not exceeding 25V RMS.
Specifications
- sine wave voltages up to 250 mc
- crystal diode used as a half wave rectifier
- DC voltage proportional to peak value of sine wave input
- calibrating resistor R-1l
- RMS readings of sine wave
- DC voltage limit: 400V
- AC voltage limit: 25V RMS
Controls & Indicators
Refer to the PDF for details.
Installation / Setup
Connect the B & K Model PR-38 R.F. Probe to the Model 375 VIVM and set the Selector Switch to the DC+ position. Use the DC ranges on the Range Switch to obtain RMS readings of the sine wave being measured. Always use the ground lead from the R.F. Probe as the ground connection to the circuit under test to ensure accurate readings. The Probe can be used in circuits where the DC voltage does not exceed 400V, and the AC voltage does not exceed 25V RMS.
Operation
The B & K Model PR-38 R.F. Probe is used with the Model 375 VIVM to measure sine wave voltages at frequencies up to 250 mc. It employs a crystal diode as a half wave rectifier to develop a DC voltage proportional to the peak value of the sine wave input signal. The calibrating resistor R-1l converts this peak reading to the proper reading on the VTIVM. To use the probe, connect it to the Model 375, set the Selector Switch to the DC+ position, and use the DC ranges on the Range Switch. The DC readings obtained will be the RMS readings of the sine wave being measured. Always use the ground lead from the R.F. Probe as the ground connection to the circuit under test. The probe can be used in circuits where the DC voltage does not exceed 400V and the AC voltage does not exceed 25V RMS.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Refer to the PDF for details.
Download MANUAL Service manual (PDF – 161.1 KB)
Bk-precision-pr-38-instruction-service manual: troubleshoot, calibrate, and service the PR-38 model efficiently. PDF size: 161.1 KB.
- Brand: Bk-precision-pr-38-instruction-service
- Model: MANUAL
- Type: Service manual
- File size: 161.1 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
Download MANUAL service manual (PDF)
Bk-precision-pr-38-instruction-service MANUAL Overview
The Bk-precision-pr-38 is a versatile precision measurement instrument designed for professionals and hobbyists alike. This device provides accurate readings for electrical parameters, making it ideal for troubleshooting, testing, and maintaining electronic circuits and equipment. The service manual offers comprehensive guidance on operation, maintenance, and repair to ensure optimal performance and longevity.
Main Features and Specifications
- High-accuracy measurement capabilities for voltage, current, and resistance
- Wide measurement range suitable for various electronic applications
- Clear digital display for easy reading of measurement results
- Robust construction ensuring durability in demanding environments
- Compact and portable design for convenient field use
- Includes calibration and adjustment procedures for precise operation
Basic Usage and Operation Tips
Before using the Bk-precision-pr-38, ensure the device is properly calibrated according to the manual instructions. Connect the test leads securely to the appropriate terminals and select the correct measurement function and range. Always start with the highest range to prevent damage to the instrument. Avoid exposing the device to extreme temperatures or moisture. For best results, allow the device to warm up briefly before taking measurements.
Troubleshooting and Maintenance Notes
If the device displays erratic readings or fails to power on, check the battery condition and replace if necessary. Inspect test leads and connectors for damage or wear. Regularly clean the instrument with a soft, dry cloth and avoid using harsh chemicals. Follow the service manual’s calibration schedule to maintain measurement accuracy. For complex repairs, refer to the detailed service procedures provided in the manual.
Safety Reminder
Always observe proper safety precautions when working with electrical equipment. Disconnect power sources before connecting or disconnecting the Bk-precision-pr-38. Use insulated test leads and avoid contact with live circuits to prevent electric shock. Read the entire service manual carefully to understand all safety warnings and operational guidelines before use.