The service manual for the Rohde & Schwarz HF-DC Millivoltmeter URV covers the setup and operation of the device, including preparation steps such as device placement, battery check, and calibration for both DC and AC measurements. It also provides troubleshooting guidance, detailing necessary equipment and methods for identifying and resolving issues related to power supply, chopper circuits, and calibration.
Manual Overview
The Rohde & Schwarz URV HF-DC Millivoltmeter service manual provides detailed guidance on troubleshooting, diagnostics, calibration, and maintenance for technicians. Troubleshooting begins with a comprehensive Fehlersuchanleitung (fault-finding guide) covering power supply issues, chopper switching voltage, and amplifier problems. The manual includes specific sections on the regulation paths for +3V and -3V, and the operation of the chopper amplifier and comparison generator. Error diagnostics are facilitated by detailed descriptions of the device’s internal processes and block diagrams for both AC and DC voltage measurements.
Calibration and adjustments are critical for maintaining measurement accuracy. The manual details procedures for absolute value calibration in both DC and AC modes, frequency response testing of probes, and null point adjustments for both mechanical and electrical components. Board-level guidance includes instructions for replacing batteries and diodes within the probe and through-head, ensuring the device’s longevity and reliability. The manual emphasizes the importance of maintaining the device’s stability and accuracy through regular checks and adjustments, making it suitable for various laboratory, field, and service applications.
Quick Issues Covered
- Diagnose power supply issues: +3V and -3V regulation paths.
- Calibrate absolute values for DC and AC voltage measurements.
- Adjust mechanical and electrical zero points for accurate readings.
Overview
The HF-DC-Millivoltmeter URV is a versatile and sensitive measuring device for both direct current (DC) and alternating current (AC) voltages, covering a frequency range from 1 kHz to 1.6 GHz. It features a newly developed universal probe with pre-attenuators and a through adapter, allowing for a wide range of measurement possibilities and adaptation to almost any measurement problem within the specified frequency range. The voltage measurement range for DC extends from 50 µV to 1000 V (up to 30 kV with a high-voltage probe), while for AC, it ranges from 0.5 mV to 10 V with the probe and through adapter, and up to 1000 V with the probe and pre-attenuator. The device is equipped with a moving coil instrument with a 105° mirror scale, offering linear scale division for all measurement ranges, and includes an additional dB scale. It also has a DC output, making it usable as a preamplifier and AC-DC converter for DC recorders and digital voltmeters. The device operates on dry batteries, making it independent of the mains, portable, and suitable for measurements requiring an isolated setup. Its low power consumption ensures that battery life is mostly limited by storage capability. The device is suitable for a variety of measurements in laboratories, testing fields, and service, and is particularly useful for maintaining and repairing mobile radio systems due to its independence from the mains.
Specifications
- HF-DC-Millivoltmeter URV 216.3612.02
- Frequenzbereich: 1 kHz bis 1,6 GHz
- Spannungsmeßbereich für Gleichspannung: 50 µV bis 1000 V
- Spannungsmeßbereich für Wechselspannung: 0,5 mV bis 10 V
- Schalter in 10-dB-Stufen
- Drehspulinstrument mit 105°-Spiegelskala
- Gleichspannungsausgang
- Betriebsspannungsversorgung aus Trockenbatterien
Controls & Indicators
Refer to the PDF for details.
Installation / Setup
The source does not provide specific information regarding installation or setup highlights, including wiring, clearances, calibration, or prerequisites.
Operation
Refer to the PDF for details.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Refer to the PDF for details.
Download GERMAN Service manual (PDF – 6.0 MB)
Service manual for Rohde & Schwarz URV HF DC Millivoltmeter; assists in troubleshooting and calibration. File size: 6.0 MB. Model: German.
- Brand: Rohde-schwarz-urv-hf-dc-millivoltmeter-service-manual
- Model: GERMAN
- Type: Service manual
- File size: 6.0 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
Download GERMAN service manual (PDF)
Overview of the Rohde-Schwarz URV HF DC Millivoltmeter
The Rohde-Schwarz URV HF DC Millivoltmeter is a precision measuring instrument designed for accurate detection and measurement of low-level DC and high-frequency signals in the millivolt range. Widely used in electronics testing, calibration, and laboratory environments, this device offers reliable performance for professionals requiring detailed voltage analysis with high sensitivity and stability.
Main Features and Specifications
- Measurement Range: DC and HF signals from microvolts to millivolts
- High input impedance for minimal circuit loading
- Wide frequency response suitable for HF applications
- Clear analog or digital display options for precise readings
- Robust build quality ensuring durability in demanding environments
- Calibration and zeroing functions for enhanced accuracy
- Compact and portable design for easy field use
Basic Usage and Operation Tips
Before taking measurements, ensure the device is properly calibrated according to the service manual instructions. Connect the test leads securely to the input terminals, observing correct polarity. Use the zero adjustment to eliminate any offset before measuring. For HF signals, ensure the device is set to the appropriate frequency range to avoid inaccurate readings. Avoid exposing the instrument to extreme temperatures or humidity to maintain optimal performance.
Troubleshooting and Maintenance Notes
If the readings appear unstable or inaccurate, verify all connections and recalibrate the device. Inspect the test leads and input terminals for damage or corrosion. Regularly clean the exterior with a dry cloth and avoid using solvents. Replace any worn or damaged components as outlined in the service manual. If internal faults occur, refer to the detailed troubleshooting section for step-by-step diagnostics and repair procedures.
Safety Reminder
Always ensure the device is powered off before connecting or disconnecting test leads. Avoid measuring voltages exceeding the specified limits to prevent damage or personal injury. Use caution when working with high-frequency signals and follow all safety guidelines provided in the manual to ensure safe operation.