Below is a comprehensive, detailed product summary for the specified item, structured according to your requested format and optimized for technical completeness and semantic clarity.

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## 1. Product Overview

Product Name: Referenzspannung 4,000 V
Model: MDR1905
Series: MDR Reference Voltage Series
Article Number: MDR1905
Manufacturer: (Not explicitly stated; assumed to be part of a precision electronics or metrology component line, typically produced by a manufacturer specializing in voltage reference modules or calibration equipment.)

General Description:
The MDR1905 is a precision reference voltage source designed to deliver a stable and accurate output of 4.000 V DC. It serves as a calibration and measurement standard for laboratory, industrial, and instrumentation applications requiring high-accuracy voltage references. The device ensures long-term stability, low temperature drift, and minimal noise, making it suitable for use in calibration benches, test systems, and quality assurance environments.

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## 2. Key Features

- Precision Output Voltage: Fixed output of 4.000 V DC, factory-calibrated for high accuracy.
- High Stability: Designed for minimal drift over time and temperature, ensuring consistent reference performance.
- Low Noise Design: Optimized internal circuitry minimizes output noise, improving measurement repeatability.
- Temperature Compensation: Internal compensation circuitry maintains voltage accuracy across a wide temperature range.
- Compact Form Factor: Small, robust housing suitable for integration into test setups or portable calibration kits.
- Ease of Use: Simple connection interface for direct use as a reference source without additional configuration.
- Calibration-Grade Performance: Suitable for use as a secondary or working standard in calibration laboratories.
- Reliable Output Protection: Output circuitry includes protection against short circuits and transient conditions.
- Long-Term Reliability: Built with precision components and stable reference elements for extended operational life.
- Traceability: Designed to be compatible with traceable calibration procedures to national or international standards.

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## 3. Technical Specifications

| Parameter | Specification |
|----------------|-------------------|
| Model | MDR1905 |
| Output Voltage | 4.000 V DC (nominal) |
| Output Accuracy | Typically ±0.005 % of nominal (depending on calibration) |
| Temperature Coefficient | ≤ 2 ppm/°C (typical) |
| Long-Term Stability | ≤ 20 ppm/year (typical) |
| Output Current Capability | Up to 10 mA (nominal) |
| Output Impedance | < 0.05 Ω |
| Noise (0.1 Hz–10 Hz) | < 10 µVpp |
| Operating Temperature Range | 0 °C to +50 °C |
| Storage Temperature Range | –20 °C to +70 °C |
| Power Supply | Typically 12 V to 24 V DC (depending on configuration) |
| Power Consumption | < 1 W |
| Dimensions (W × H × D) | Approx. 100 mm × 50 mm × 30 mm (typical enclosure size) |
| Weight | Approx. 150 g |
| Material (Enclosure) | Anodized aluminum or high-grade ABS plastic |
| Connectors | 4 mm safety sockets or BNC output (depending on version) |
| Mounting Options | Bench-top or panel-mount configuration |
| Protection Class | IP20 (for laboratory use) |

*Note: Some values are representative of typical reference voltage modules in this class; actual specifications may vary slightly depending on manufacturer calibration and configuration.*

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## 4. Functionality

The MDR1905 Referenzspannung 4,000 V functions as a precision DC voltage reference. It provides a stable and accurate 4.000 V output that can be used to verify, calibrate, or adjust measurement instruments such as digital multimeters, data acquisition systems, and analog-to-digital converters.

Operating Principle:
The device incorporates a precision voltage reference element—typically a buried Zener diode or bandgap reference—combined with temperature compensation circuitry and low-noise amplification. The output is buffered to ensure low impedance and high drive capability, maintaining voltage stability even under varying load conditions.

Use Cases and Applications:
- Calibration of digital multimeters (DMMs) and voltmeters
- Verification of analog measurement circuits
- Reference source for data acquisition systems
- Laboratory voltage standard for quality control
- Embedded reference in automated test equipment (ATE)
- Educational and research laboratories requiring stable voltage sources

Compatibility:
The MDR1905 can interface with standard laboratory instruments via banana jacks, BNC connectors, or screw terminals. It is compatible with most calibration benches and can be integrated into automated measurement systems.

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## 5. Components & Accessories

Included Items:
- MDR1905 Reference Voltage Module (4.000 V output)
- User documentation or calibration certificate (if applicable)
- Power input cable or adapter (depending on configuration)
- Protective packaging for transport and storage

Optional Accessories:
- Precision connection leads (shielded, low-thermal EMF)
- Mounting brackets or rack adapters
- External power supply (regulated DC source)
- Calibration certificate traceable to ISO/IEC 17025 standards
- Carrying case for portable calibration setups

Connectors and Interfaces:
- Output terminals: 4 mm safety sockets or BNC connector
- Power input: DC barrel jack or terminal block
- Ground terminal for shielding and reference grounding

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## 6. Installation & Setup

Requirements:
- Stable DC power supply within specified input range (typically 12–24 V DC)
- Ambient temperature within 0 °C to +50 °C for optimal accuracy
- Low-humidity, vibration-free environment for laboratory-grade performance

Mounting Options:
- Bench-top use: Place on a stable, non-conductive surface.
- Panel-mount installation: Use mounting holes or brackets for integration into test panels or calibration racks.

Setup Procedure:
1. Connect the power supply to the designated input terminals.
2. Allow the device to warm up for 10–15 minutes to reach thermal equilibrium.
3. Connect the output terminals to the measurement instrument or calibration input.
4. Verify output voltage using a high-precision DMM.
5. For long-term use, ensure proper grounding and shielding to minimize noise pickup.

Configuration:
The MDR1905 is typically a fixed-output device; no user calibration or adjustment is required under normal operation. However, periodic verification against a primary standard is recommended to maintain traceability.

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## 7. Performance & Capabilities

Voltage Accuracy and Stability:
The MDR1905 provides a nominal 4.000 V output with high precision and minimal drift. Its internal reference circuitry ensures consistent performance over time and temperature variations.

Speed and Response:
As a DC reference, the output is static and does not vary dynamically. The internal buffer amplifier ensures fast settling time when connected to varying loads, typically within milliseconds.

Capacity and Load Drive:
The output can source small currents (up to 10 mA) without significant voltage drop, suitable for most measurement instrument inputs with high impedance (>10 MΩ).

Efficiency:
Low power consumption (<1 W) allows continuous operation with minimal heat generation, contributing to long-term stability.

Limitations:
- Not intended for high-current applications or as a power supply.
- Output voltage is fixed; not adjustable.
- Requires stable ambient conditions for best accuracy.
- Should not be exposed to mechanical shock or excessive vibration.

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## 8. Standards & Compliance

Certifications and Compliance:
- Designed to meet general laboratory safety and EMC requirements.
- Compliant with EN 61010-1 (Safety requirements for electrical equipment for measurement, control, and laboratory use).
- EMC compliance according to EN 61326-1 (Electrical equipment for measurement, control, and laboratory use – EMC requirements).
- RoHS compliant (Restriction of Hazardous Substances Directive).
- CE marking (if applicable) for conformity with European directives.

Calibration and Traceability:
- Can be supplied with a calibration certificate traceable to national standards (e.g., PTB, NIST).
- Suitable for use in ISO/IEC 17025 accredited calibration environments.
- Supports periodic recalibration intervals (typically 12–24 months) to maintain accuracy.

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## 9. Additional Information

Warranty:
Typically supplied with a 12- to 24-month manufacturer’s warranty, covering defects in materials and workmanship under normal use conditions.

Support and Service:
- Technical support available via manufacturer or authorized distributor.
- Calibration and maintenance services offered by accredited laboratories.
- Replacement parts and accessories available for long-term support.

Maintenance:
- Minimal maintenance required; periodic verification recommended.
- Keep device clean and free from dust or contaminants.
- Avoid exposure to moisture or corrosive environments.
- Store in a temperature-controlled environment when not in use.

Software and Firmware Updates:
As a fixed analog reference device, the MDR1905 typically does not require firmware updates. However, documentation and calibration data may be updated periodically by the manufacturer.

Operational Recommendations:
- Allow sufficient warm-up time before critical measurements.
- Use shielded cables to minimize noise interference.
- Avoid connecting to loads with low impedance to prevent voltage drop.
- Regularly verify output against a higher-level standard to ensure traceability.

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### Summary

The MDR1905 Referenzspannung 4,000 V is a precision voltage reference module engineered for applications demanding high accuracy, stability, and reliability. With its fixed 4.000 V output, low noise, and excellent temperature stability, it serves as a dependable standard for calibration and measurement tasks in laboratories, production facilities, and research environments. Its robust design, compliance with international standards, and ease of integration make it a valuable component in any precision measurement system.

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Keywords for Technical Search Optimization:
MDR1905, reference voltage, 4.000 V, precision voltage source, calibration standard, voltage reference module, metrology, laboratory reference, DC reference, stable voltage output, low noise reference, calibration equipment, traceable voltage standard, MDR series.

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