检测认证人脉交流通讯录
- 合用场合-> Suitable Situation ->
适用于工厂、学校和科研单位作精密测量及精密交/直流电阻标准。
It is suitable to be used as precise measuring standard and precise AC/DC resistance standard for factories, colleges, and research institutes.
详细指标-> Detail Specification->
1． 电阻范围Resistance range：1Ω~1.11111MΩ;
Resistance range：1Ω~1.11111MΩ;
2． 最小步进值Minimum step value：1Ω；
Minimum step value：1Ω；
3． 额定功率Nominal power: 0.25W;
Nominal power: 0.25W;
4． 温度系数Temperature coefficien：±5×10-6/℃；
emperature coefficien：±5×10-6/℃
5． 其他参数Other parameters：
Other parameters
步进电阻值
100kΩ 10kΩ 1kΩ 100Ω 10Ω 1Ω
时间常数（ 10-8 s ） 100 5 5 1 1 5
测试频率上限（ kHz ） 2 10 20 50 100 100
最大允许误差 ±0.02% ±0.1%
年变化 ±0.01% ±0.05%
步进电阻值Step resistance value 100kΩ 10kΩ 1kΩ 100Ω 10Ω 1Ω
Step resistance value 100kΩ 10kΩ 1kΩ 100Ω 10Ω 1Ω
时间常数（10-8）Time constant 100 5 5 1 1 5
Time constant(10-8) 100 5 5 1 1 5
测试频率上限（kHz） Measuring frequency upper limit 2 10 20 50 100 100
Measuring frequency upper limit(kHz) 2 10 20 50 100
最大允许误差*Maximum permissible error ±0.02% ±0.1%
Maximum permissible error ±0.02% ±0.1%
年变化Annual variation ±0.01% ±0.05%
Annual variation ±0.01% ±0.05%
*：电阻箱的工作频率等于或低于测试频率上限时的最大允许误差。
The working frequency is equal to or less than the permissible error limit of measurement frequency of the resistance box..
技术规格-> Technical specification->
SB2012型精密交/直流电阻箱由六个十进位盘构成，采用时间常数小、稳定性高的精密电阻器，独特的屏蔽补偿措施及精密密封开关。具有 频率特性好、稳定性高、性能可靠、开关接触电阻变差小等独特优点
SB2012 Precise AC/DC Resistance Box is composed of 6 decade scales and precise resistors, whose time constant is little and stability is very high. It adopts special screen compensation measure and precise seal switch. It also possesses many special characteristics, such as good frequency characteristic, good stability, reliable performance, and variation differences are very little when switch touches resistance.
