Standard Resistance Box SRB-5

Description

Technical Specifications

• Model: SRB-5

• Type: Standard Resistance Box / Reference Standard

• Accuracy: ±0.2% (optional 0.1% accuracy available in SRB-15 model)

• Resistance Range: 100 µΩ to 10 kΩ

• Resistance Steps (9 values):

  • 100 µΩ, 1 mΩ, 10 mΩ, 100 mΩ, 1 Ω, 10 Ω, 100 Ω, 1 kΩ, 10 kΩ

• Resistor Material: High-stability Manganin wire coils

• Temperature Coefficient (TCR): 0.000002 (virtually zero temperature coefficient)

• Power Rating: > 1 Watt per resistance value

• Maximum Current Capacity:

  • 100 µΩ – 100 A

  • 1 mΩ – 50 A

  • 10 mΩ – 15 A

  • 100 mΩ – 3.5 A

  • 1 Ω – 1.2 A

  • 10 Ω – 0.35 A

  • 100 Ω – 120 mA

  • 1 kΩ – 35 mA

  • 10 kΩ – 15 mA

• Compatible Instruments: Kelvin Double Bridge (KDB) and Digital Micro-Ohm Meter

• Applications: Calibration laboratories, wire & cable industry, testing facilities, QA departments, R&D centers, educational institutes

📋 Product Overview

The Standard Resistance Box SRB-5 is a high-precision calibration instrument designed to provide stable and accurate resistance values for critical electrical measurements. Covering a wide resistance range from 100 micro-ohms to 10 kilo-ohms, it offers enhanced accuracy and higher wattage capability compared to standard resistance boxes, making it ideal for low-resistance measurement and high-current testing.

The unit employs manganin resistance coils, chosen for their extremely low temperature coefficient (TCR = 0.000002), ensuring exceptional stability and minimal resistance drift under temperature variations. Each resistance step is rated at more than 1 watt, allowing safe operation even under demanding current loads.

With nine precise resistance values, the SRB-5 integrates seamlessly with Kelvin Double Bridges and Digital Micro-Ohm Meters, serving as a dependable reference standard for calibration, verification, and comparison of test instruments.

Widely used across wire & cable manufacturing, calibration laboratories, quality inspection departments, R&D centers, and technical institutions, the SRB-5 delivers unmatched precision, durability, and performance for professional resistance measurement applications.

⚡ Key Features

• ±0.2% high-precision accuracy (0.1% optional with SRB-15 variant)

• Wide resistance range from 100 µΩ to 10 kΩ

• Nine fixed resistance values for versatile calibration needs

• Manganin wire coils with virtually zero temperature coefficient

• High current handling capacity, ideal for micro-ohm testing

• >1 Watt power rating on all resistance steps

• Compatible with Kelvin Double Bridge & Digital Micro-Ohm Meters

• Trusted choice for laboratory, industrial, and educational use