2793 Decade Resistance Boxes
The 2793 Decade Resistance Boxes are high-accuracy, stable DC variable resistors with six dials, designed for precise resistance calibration and measurement applications.
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Overview
The 2793 Decade Resistance Boxes are high-accuracy, stable DC variable resistors with six dials, designed for precise resistance calibration and measurement applications.
Specifications
| Parameter | Value |
|---|---|
| Resistance Range 279301 | 0.100Ω to 1,111,210Ω (Minimum resistance is 0.100Ω) |
| Resistance Range 279303 | 0 to 111.110MΩ |
| Dial Composition 279301 | 0.001Ω x 10 + 0.01Ω x 10 + 0.1Ω x 11 + 1Ω x 10 + 10Ω x 10 + 100Ω x 10 |
| Dial Composition 279303 | 100Ω x 10 + 1kΩ x 10 + 10kΩ x 10 + 100kΩ x 10 + 1MΩ x 10 + 10MΩ x 10 |
| Resolution 279301 | 0.001Ω |
| Resolution 279303 | 0.05% |
| Accuracy 279301 | ±(0.01% + 2mΩ) at temperature 23±2°C, humidity 45 to 75%, and 0.1W power application |
| Accuracy 279303 | 100Ω to 1kΩ steps: ±0.05%, 10kΩ to 600kΩ steps: ±0.1%, 1MΩ and 10MΩ steps: ±0.2% |
| Max. Allowable Input Power 279301 | 0.25W/step, Within 1W for overall instrument |
| Max. Allowable Input Power 279303 | 100Ω step: 100mA, 1kΩ step: 30mA, 10kΩ step: 10mA, 100kΩ step: 2mA, 1MΩ step: 200μA, 10MΩ step: 20μA |
| Temperature Coefficient 279301 | α23 = +5 to +10 x 10^-6/°C, β = -0.3 to -0.7 |
| Temperature Coefficient 279303 | 100Ω, 1kΩ step: α23 = (-2 to +20) x 10^-6/°C, β = -0.3 to -0.7; 10kΩ, 100kΩ, 1MΩ, 10MΩ step: α23 = +30 x 10^-6/°C, β = -0.1 |
| Insulation Resistance | More than 500MΩ at 500VDC between panel and circuit |
| Dielectric Strength | 1,000VAC for one minute between panel and circuit |
| Operating Temperature Range | 0 to 40°C |
| Storage Temperature Range | -10 to 50°C |
| Humidity Range | 25 to 85%, relative humidity |
| Residual Resistance | Less than 23mΩ |
Applications
1. Calibration of resistance thermometers 2. Calibration of bridges 3. Calibration of insulation resistance testers
Key Features
1. High accuracy and stability 2. High reproducibility 3. 1mΩ resolution 4. In-line display for easy reading 5. Shock and vibration resistance 6. Suitable for calibration of resistance thermometers and bridges
Datasheet
Product Datasheet
PDF
Supplier Information
<p>Yokogawa was founded in 1915 and has more than 6,000 test and measurement instrument patents. It focuses on developing and providing the best test and measurement solutions. Yokogawa Measurement Technology (Shanghai) Co., Ltd. ensures the excellent quality of the brand and contributes to the growth of China's industry.</p>
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