RC BOX Model RCS-502 IET LABS

RC Box Model RCS-502 – IET Labs

Precision Resistance and Capacitance Substitution Box for Accurate Electronic Testing

The RC BOX Model RCS-502 IET LABS is a high-precision resistance and capacitance substitution box, combining the functionality of the RS-201 (precision resistance) and CS-301 (precision capacitance) into a single, compact unit. Engineered for applications that demand tighter tolerances and greater accuracy, the RCS-502 is ideal for use in calibration labs, electronics development, quality assurance, and education.

Designed with both precision and portability in mind, the RCS-502 features seven resistance decades and six capacitance decades, allowing users to quickly dial in accurate values using easy-to-read rotary switches. The model supports a wide range of values from 1 Ω up to nearly 10 MΩ and 100 pF up to 99.9999 µF, with fine resolution and low residual impedance.

This dual-function substitution box eliminates the need for separate instruments, offering excellent value for users who require accurate resistance and capacitance substitution in a compact and durable form factor.

Features

• Combines precision resistance and capacitance substitution in one unit

• High accuracy for both resistance (0.1%) and capacitance (1% under 10 µF)

• Compact and lightweight design for portability

• Rotary switches for fast, direct setting of values

• Ideal for use in calibration, testing, and troubleshooting applications

• Durable construction and high-reliability components

Applications

• Precision testing of circuits in R&D environments

• Calibration and verification of measurement instruments

• Educational laboratories and training programs

• Simulating component values in prototypes

• Field and bench testing in maintenance and QA departments

Specifications

• Resistance range: 0 to 9,999,999 Ω

• Capacitance range: 0 to 99.9999 µF

• Resistance accuracy: ±(0.1% + 25 mΩ)

• Capacitance accuracy:

  • <10 µF: ±(1% + 3 pF)

  • ≥10 µF: ±7%

• Resolution:

  • Resistance: 1 Ω

  • Capacitance: 100 pF

• Decades:

  • Resistance: 7

  • Capacitance: 6

• Power rating (resistance): 0.5 W (up to 2.5 W at highest decade)

• Voltage rating (capacitance): 100 V (25 V for 10–100 µF range)

• Residual resistance: ≤0.39 Ω (≤0.056 Ω/decade)

• Residual capacitance: ≤42 pF (≤7 pF/decade)

• Physical dimensions: 18.8 x 8.4 x 6.4 cm

• Weight: 410 g (14 oz)

The RCS-502 is a reliable and accurate solution for professionals who require both resistance and capacitance substitution in a precision format. Its dual capabilities make it a versatile tool for both lab and field use.