Model 2793 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 ± 1.1m at 0.1 setting.. 1 m 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 dail system, various types of resistance thermometers and bridges can te calibrated accurately and promptly.. Excellent ami shock and -vibration properties
|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.
|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|
|Accuracy||±(0.01Ω + 2mΩ) at temperature of 23 ±2°C, humidity of 45 to 85%, 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)|