HPRS-C-7-1 High Power Resistance Decade Box

HPRS-C-7-1 High Power Resistance Decade Box

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Photo represents example of series. See datasheet for more details on any specific model.

  • Resistance from 1 mΩ to 10 MΩ
  • Power Rating : 225 W/decade, 250 W max. or higher (Contact IET for Custom Higher Power Units)
  • Accuracy: 0.5% or 1%
  • Voltage Rating: 1000 V or higher
  • Special and custom configurations available
Priced at $2,446

Estimated Delivery is 2 to 4 weeks

Repair/Calibration Quote Technical Support Request

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.

HPRS Series High Power Resistance Decade Box Basic Specifications (See datasheet for full specifications)

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"

Resistance per step
Total decade resistance
Max current*
Max power per step* (W)
Temperature coefficient (ppm/°C)
Resistor Type
1 mΩ
0.009 Ω
8 A
0.036
±50
Resistance Wire
10 mΩ
0.09 Ω
6 A
0.36
±50
100 mΩ
0.9 Ω
6 A
3.6
±20
1 Ω
9 Ω
5 A
25
-20 to +80
Power Film
10 Ω
90 Ω
1.5 A
25
-20 to +80
100 Ω
900 Ω
0.5 A
25
-20 to +80
1 kΩ
9 kΩ
150 mA†
25†
-20 to +80
10 kΩ
90 kΩ
50 mA†
25†
-20 to +80
100 kΩ
900 kΩ
V limit†
V limit†
-20 to +80
Wirewound/metal film
1 MΩ
9 MΩ
V limit†
V limit†
±50
Wirewound/film
*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
†Subject to 1000 V (dc+ac) peak max

 

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