Decade Resistance Boxes 2793 #279301
Model 2793 decade resistance box is high-accuracy, stable DC variable resistor with 6 dials and is available in two styles: 279301 for medium resistance from 0.1 to 1,111.210 Ω in 1 mΩ steps (best suited for calibration of resistance thermometers or bridges); 279303 for high resistance from 0 to 111.1110 MΩ in 100 Ω steps (suitable for calibration of insulation resistance testers or bridges).
- High accuracy and stability
- High reproducibility
Excellent reproducibility is obtainable because dial switches with low contact resistance are used. For example, changes in contact resistance is within ± 1.1mΩ at 0.1Ω setting. - 1 mΩ resolution
- Simple, quick dial operation
- In-line display for city reading
- Ideal for calibration of resistance thermometers and brides
Due to its high accuracy and a dial system, various types of resistance thermometers and bridges can be calibrated accurately and promptly. - Excellent anti shock and -vibration properties
What is a Decade Capacitance Box Used for?
Decade capacitance boxes are test instruments that simulate prototypical electrical values.
Decade resistance box calibration procedures: The 279301 is used for medium resistance from 0.1 to 1,111.210 Ω in 1 mΩ steps (best suited for calibration of resistance thermometers or bridges). The 279303 is used for high resistance from 0 to 111.1110 MΩ in 100 Ω steps (suitable for calibration of insulation resistance testers or bridges).
What is a Decade Inductor?
Decade inductance boxes are another type of test instrument used for calibration.
Specifications
| Dielectric Strength | 1,000 V AC for one minute between Panel and Circuit |
|---|---|
| Insulation Resistance | More than 500MΩ at 500V DC between panel and circuit |
| Dimension | 497（W）×116（H）×140（D）mm, excluding protrusions 19.57 x 4.57 x 5.51 in. |
| Weight | Approx. 4.8kg 10.6 lbs |
| Resistance Range | 0.1mΩ to 1,111.2100Ω (minimum resistance is 0.1Ω) |
| Dial Composition | 0.001Ω x 10 + 0.01Ω x 10 + 0.1Ω x 11 + 1Ω x 10 + 10Ω x 10 + 100Ω x 10 |
| Resolution | 1mΩ |
| Accuracy | ±(0.01%+2mΩ) at temperature of 23 ±2°C, humidity of 45 to 75%, and 0.1W Power Application |
| Max. Allowable Input Power | 0.2SW/slep. Within 1W for overall instrument. |
| Max. Allowable Input Current | 50mA (100Ω steps), 150mA (10Ω steps), 500mA (10 Ω steps) and 1.5A (0.1Ω steps) |