6820T Compact Dry QHR System

• Cryogen-Free Dry System
• Best Accuracy to 0.003 × 10-6 with CCC Model 6200A
• Best Accuracy to 0.015 × 10-6 with DCC Model 6020Q
• 5 Tesla Standard System Magnet
• Base Temperature < 3.6 K
• Low Operating Costs
• Direct Transfer to 100 Ω, 1 kΩ, 10 kΩ, and 100 kΩ Standards
• System Range 0.1 Ω to 1 MΩ with 6200A or 100 kΩ with 6020Q
• Optional multiple value arrays of RK/2, 100 Ω, 1 kΩ, 10 kΩ and 100 kΩ
• Hall Bar and Arrays can be intercompared simultaneously when using 6200A
• Current Range when using 6200A
o Three high-current ranges +/- (50 mA, 100 mA and 150 mA)
o Five low-current ranges +/- (100 μA, 333 μA, 1 mA, 3.3 mA, and 10 mA)

 

Overview

Introducing the Revolutionary MI 6820T QHR System: Your New Intrinsic Resistance Standard. In today’s rapidly evolving world, precision and accuracy are paramount, National laboratories and industries around the globe demand reliable, traceable reference standards to ensure the integrity of their measurements. That’s where Measurements International (MI) steps in with the measurement-changing 6820T QHR Table Top System.
Let’s talk about efficiency. With the 6820T, you can say goodbye to the headaches of liquid helium shortages, unpredictable deliveries, and skyrocketing prices. These challenges have become all too common, impeding the progress of countless labs. The 6820T requires no liquid helium to operate, ensuring uninterrupted and cost-effective performance. Drawing upon years of expertise in Quantized Hall System design, resistance measurements, and working with a leading edge cryogenics company in the United States, the MI 6820T is a fully automated primary standard. It has been meticulously engineered to deliver highly reproducible resistance standards, empowering you to achieve your measurement goals with ease. The system has a modular design, consisting of three essential components: the QHE samples, cryogenics system, and bridge measurement system. This seamless integration guarantees a streamlined workflow and allows for effortless customization to suit your specific requirements. Each component can be ordered individually to meet your laboratory needs and requirements.
The MI 6820T QHR System is backed by our unwavering commitment to customer satisfaction. We provide comprehensive support, ensuring a smooth installation process, extensive training, and ongoing assistance whenever you need it. With us by your side, you can focus on what matters most – advancing your research and calibration, and exceeding your performance targets.

Magnet Specifications
Superconducting Magnet  
Magnet Type Solenoid
Rated Central Field 5.0 T
Rated Operating Current @ 6.0 T 25.45 A
Total Inductance 10.526 H
Homogeneity ± 0.2 % 1 cm DSV
Superconductor Twisted Multi-filamentary Nb Ti/Cu
Fabrication Wet wound with epoxy to prevent training
Quench Protection Adiabatic protection using copper matrix and diodes

 

Cryocooler Specifications
Cryocooler  
Cooling Powers at 50 Hz 1st Stage: 35 W @ 45 K

2nd Stage: 0.9 W @ 4.2 K
Base Temperature < 3.6 K
Orientation Vertical Only
Maintenance Interval 30,000 hrs – 40,000 hrs
Ambient Temperature 5 °C to 35 °C
Bridge Specifications

6200A

Range

(1:1 Ratio)

 Accuracy

× 10-6

 Range

(1:10 Ratio)

 Accuracy

× 10-6

 Range

(1:100 Ratio)

 Accuracy

× 10-6
0.1 Ω to 0.1 Ω 0.01 0.1 Ω to 1 Ω 0.01 1 Ω to 100 Ω 0.003
1 Ω to 1 Ω 0.003 1 Ω to 10 Ω 0.003 100 Ω to 10 kΩ 0.003
10 Ω to 10 Ω 0.003 10 Ω to 100 Ω 0.003 1 kΩ to 100 kΩ 0.005
100 Ω to 100 Ω 0.003 100 Ω to 1 kΩ 0.003 10 kΩ to 1 MΩ 0.01
1 kΩ to 1 kΩ 0.003 1 kΩ to 10 kΩ 0.003
10 kΩ to 10 kΩ 0.003 1 kΩ to 13 kΩ 0.003
100 kΩ to 100 kΩ 0.005 10 kΩ to 100 kΩ 0.005
1 MΩ to 1 MΩ 0.01 100 kΩ to 1 MΩ 0.01
  • Note: Either RS or RX can be selected as the standard.

6020Q

0.1 Ω to 10 kΩ
Rx Ratio & Accuracy × 10-6
*
– 1:1 10:1 14:1
0.1 Ω < 0.02 – –
1 Ω < 0.015 < 0.015 < 0.015
10 Ω < 0.015 < 0.015 < 0.015
100 Ω < 0.015 < 0.015 < 0.015
1 kΩ < 0.015 < 0.015 < 0.015
10 kΩ < 0.02 < 0.015 –
100 kΩ – – –
  • Note: Either RS or RX can be selected as the standard. 6020Q uncertainties in the bridge and software are specified at the 2σ level (95 %) this includes all secondary specifications such as linearity and noise with a ± 2 °C temperature variance.

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