2793 Decade Resistance Boxes
The 2793 Decade Resistance Boxes are high-accuracy, stable DC variable resistors with six dials, available in two styles: 279301 for medium resistance and 279303 for high resistance. These devices are ideal for calibration of resistance thermometers, insulation resistance testers, and bridges.
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Overview
The 2793 Decade Resistance Boxes are high-accuracy, stable DC variable resistors with six dials, available in two styles: 279301 for medium resistance and 279303 for high resistance. These devices are ideal for calibration of resistance thermometers, insulation resistance testers, and bridges.
Specifications
| Parameter | Value |
|---|---|
| Model | 279301, 279303 |
| 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×10+0.01Ω×10+0.1Ω×10+1Ω×10+10Ω×10+100Ω×10 |
| Dial Composition 279303 | 100Ω×10+1kΩ×10+10kΩ×10+100kΩ×10+1MΩ×10+10MΩ×10 |
| Resolution | 0.001Ω |
| 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: ±0.02% 10kΩ to 100kΩ steps: ±0.05% 1MΩ and 10MΩ steps: ±0.1% |
| 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 +10×10^-6/°C β=-0.3 to -0.7×10^-6/°C |
| Temperature Coefficient 279303 | 100Ω, 1kΩ steps: α23=-2 to +20×10^-6/°C β=-0.3 to -0.7×10^-6/°C 10kΩ, 100kΩ, 1MΩ, 10MΩ steps: α23=+30×10^-6/°C β=-0.1×10^-6/°C |
| Insulation Resistance | More than 500MΩ at 500VDC between panel and circuit |
| Dielectric Strength 279301 | 1,000VAC for one minute between panel and circuit |
| Dielectric Strength 279303 | 2,500VAC for one minute between panel and circuit |
| External Dimensions | 116×497×140mm |
| Weight 279301 | 4.8kg |
| Weight 279303 | 5.0kg |
Applications
1. Calibration of resistance thermometers 2. Calibration of insulation resistance testers 3. Calibration of bridges
Key Features
1. High accuracy and stability 2. High reproducibility 3. Excellent shock and vibration resistance 4. Easy-to-read in-line indication 5. Best suited 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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