HPRS SERIES HIGH POWER RESISTANCE DECADE BOX

Brand	IET Labs, Inc
Sub Categories	Lab tools
Application	Resistance Decade Box

Category: Test and Measurements

GENERAL

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%
Special and custom configurations available

DESCRIPTION

The High-Power Decade Resistance Substituter (HPRS) Series is a family of resistance decades offering a broad choice of high-power, excellent-performance resistance sources.

The HPRS Series resistance decades 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 decades are useful development tools wherever precise resistances with high-power handling capacity are required.

SPECIFICATION

HPRS Series High Power Resistance Decade 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

DATASHEET AND MANUAL

Data Sheet: This document explains the features, options, Specifications and option models for this item.
Product Manual: Specifications and option models for this item. This document contains the technical product manual and guidelines.

ACCESSORIES

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