- 电阻范围为1mΩ至10MΩ
- 额定功率：225 W / decade，最大250 W.或更高（联系IET定制更高功率单元）
- 准确度：0.5％或1％
- 额定电压：1000 V或更高
- 提供特殊和自定义配置
The High-Power Decade Resistance Substituter (HPRS) Series is a family of resistance decade boxes offering a broad choice of high-power, excellent-performance resistance sources.
The HPRS Series resistance decade boxes employ state-of-the-art precision resistors of various types for high accuracy, high stability, and low temperature and power coefficients of- resistance. High-power resistors within the unit are made available without sacrificing other electrical properties.
The standard models offer a choice of 3 to 8 decades. The panels are clearly labeled showing the step size and maximum voltage and current limitations for each decade.
With a resolution as low as 1 mΩ and a maximum resistance of 10 MΩ , the HPRS resistance decade box may be used as a general purpose substituter as well as a high power load for testing power supplies and for other high-power applications.
Applications include calibration of meters and instruments. HPRS resistance decade boxes are useful development tools wherever precise resistances with high-power handling capacity are required.
Accuracy:
Option F: ±(1% + 20 mΩ)
Option C: ±(0.5% + 20 mΩ)
Zero Resistance: <5 mΩ per decade
Maximum Voltage to Case: 1000 V peak Switches:
Continuous rotation 10 positions marked "0"-"9"
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Resistance per step
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Total decade resistance
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Max current*
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Max power per step* (W)
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Temperature coefficient (ppm/°C)
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Resistor Type
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1 mΩ
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0.009 Ω
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8 A
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0.036
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±50
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Resistance Wire
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10 mΩ
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0.09 Ω
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6 A
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0.36
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±50
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100 mΩ
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0.9 Ω
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6 A
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3.6
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±20
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1 Ω
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9 Ω
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5 A
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25
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-20 to +80
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Power Film
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10 Ω
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90 Ω
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1.5 A
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25
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-20 to +80
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100 Ω
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900 Ω
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0.5 A
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25
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-20 to +80
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1 kΩ
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9 kΩ
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150 mA†
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25†
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-20 to +80
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10 kΩ
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90 kΩ
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50 mA†
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25†
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-20 to +80
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100 kΩ
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900 kΩ
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V limit†
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V limit†
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-20 to +80
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Wirewound/metal film
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1 MΩ
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9 MΩ
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V limit†
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V limit†
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±50
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Wirewound/film
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*Subject to maximum of 250 W max. per unit: 9 Steps per decade, multiply the decade value by the power per step. Multiple decades can be used to share power loads
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†Subject to 1000 V (dc+ac) peak max
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