Fluke 720A Kelvin-Varley Divider
- High-resolution primary standard for ratio measurements
- 0.1 ppm of input absolute linearity, 0.1 ppm resolution, seven decades
- Temperature coefficient of linearity of 0.1 ppm/ºC
- Built-in self-calibration bridge
- Description
- Additional information
- Specifications
Description
The Fluke 720A is a high-precision primary standard for ratio measurements, specifically designed as a Kelvin-Varley Divider. It represents the pinnacle of accuracy in DC voltage ratio measurements, setting a new benchmark for metrology laboratories worldwide.
Key Features:
- Unparalleled Accuracy:
- Boasts an astonishing 0.1 ppm of input absolute linearity, ensuring exceptionally precise ratio measurements.
- Offers 0.1 ppm resolution across seven decades, providing unmatched granularity in readings.
- Exhibits a remarkably low temperature coefficient of linearity of 0.1 ppm/°C, minimizing the impact of temperature fluctuations on measurement accuracy.
- Advanced Self-Calibration:
- Incorporates a built-in self-calibration bridge, enabling convenient on-the-spot calibration checks and adjustments.
- This feature minimizes downtime and ensures consistent performance over time.
- Exceptional Resolution:
- Delivers high-resolution measurements, enabling the detection of even the smallest variations in voltage ratios.
- This level of precision is crucial in critical applications where minute differences are significant.
- Robust and Reliable Construction:
- Designed with meticulous attention to detail and built to withstand the demands of rigorous laboratory environments.
- Ensures long-term stability and reliability for years of dependable service.
Applications:
- Calibrating High-End Instrumentation:
- Serves as the cornerstone for calibrating a wide range of high-precision instruments, including:
- Digital voltmeters (DVMs)
- High-accuracy current sources
- Resistance standards
- Other voltage and ratio measurement devices
- Metrology and Scientific Research:
- Indispensable for research and development in fields such as:
- Metrology laboratories
- Scientific research institutions
- Aerospace and defense industries
- Critical Measurement Applications:
- Employed in applications where the utmost accuracy and reliability are paramount, such as:
- High-voltage calibration
- Aerospace and defense testing
- Scientific experiments
The Fluke 720A transcends the limitations of conventional measurement standards, offering an unprecedented level of accuracy and reliability. It empowers metrology laboratories and researchers to achieve new heights of precision in their measurements, driving advancements in science and technology.
Additional information
| Brand | Fluke Calibration |
|---|
Specifications: 720A Kelvin-Varley Divider
| General specifications | |
| Ratio range | 0 to 1.0 (1.0 input tap) and 0 to 1.1 (1.1 input tap) |
| Resolution | 0.1 ppm of input with seven decades 0.2 |
| Absolute linearity | (At calibration temperature and without the use of a correct chart) ±1.0 ppm of input at dial settings of 1.1 to 0.1, ±0.1 (10S)1/3 of input at dial settings (S) of 0.1 to 0 |
| Absolute linearity stability | (Without self-calibration) ±1.0 ppm of input/yr at dial settings of 1.1 to 0.1, ±1.0 (10S)(2/3) ppm of input/yr at dial setting (S) of 0.1 to 0 Note: Absolute linearity is defined as the linearity between max and min output voltages. The self-calibration procedure may be used at any time to reset absolute linearity to ±0.1 ppm of input. |
| Temperature coefficient of linearity | ±0.05 ppm of input ºC maximum at dial settings of 1.1 to 0.1 |
| Short-term linearity stability | Under typical standards laboratory conditions (temperature maintained within ± 1 ºC) and with an applied voltage of up to 100V, stability of linearity is ± 0.01 ppm/24 hours and ± 0.1 ppm/30 days |
| Power coefficient of linearity | ±0.2 ppm of input/W max at dial settings of 1.1 to 0.1; ±0.2 (10S) 2 ppm of input/W max at dial settings (S) of 0.1 to 0 |
| Maximum end errors | Zero error at output low: 0.004 ppm of input Zero error at input low: 0.05 ppm of input Full-scale error: 0.05 ppm of input |
| Maximum input voltage | 1000 V on 1.0 input terminal, 1100 V on 1.1 input terminal |
| Thermal voltages | ±0.5 μV max |
| Input resistance | 100 kΩ ±0.005% at 1.0 input terminal at 25 °C, 110 kΩ ±0.005% at 1.1 input terminal at 25 °C |
| Temperature coefficient of input resistance | ±1 ppm per °C max |
| Size | 14 cm H x 48.2 cm W x 33 cm D, rack mounted (5.5 in H x 19 in W x 13 in D) |
| Weight | 8.15 kg (18 lb) |
