IET / General Radio 1689M Precision Digibridge RLC Tester

The IET / General Radio 1689M Precision Digibridge RLC Tester delivers high-accuracy measurements of resistance, inductance, and capacitance for component characterization, production testing, and R&D applications. This digital RLC meter accommodates a wide measurement span from milliohms to megaohms (R), microhenries to henries (L), and picofarads to millifarads (C), with selectable test frequencies and adjustable signal levels to match component requirements.

## Technical Specifications

Measurement parameters include resistance (R), inductance (L), and capacitance (C) across broad value ranges. The instrument operates at multiple test frequencies: 100 Hz, 120 Hz, 1 kHz, and 10 kHz. Test signal levels are adjustable from 0.1 Vrms to 1.0 Vrms nominal, accommodating voltage-sensitive components.

Measurement ranges span:

• Resistance: milliohms to megaohms
• Inductance: microhenries to henries
• Capacitance: picofarads to millifarads

The digital display presents primary measurements (R, L, or C) alongside secondary parameters including Q factor, D factor, and equivalent series resistance (ESR).

## Key Features

Multiple test frequency selection enables component evaluation under varying operating conditions. The instrument configures for both series and parallel equivalent circuit representations, allowing flexibility in component analysis methodology. Auto/manual ranging capability simplifies operation across diverse component types. High-resolution digital readout ensures precise, detailed measurement presentation. Adjustable AC test signal voltage accommodates components with differing voltage sensitivities.

## Typical Applications

The 1689M serves production testing environments, quality control laboratories, and R&D operations where precise component characterization is essential. Engineers and system integrators employ it for passive component validation, filter design verification, and impedance analysis across frequency-dependent applications.

## Compatibility & Integration

The instrument integrates into laboratory test benches and production line quality assurance workflows, accepting standard passive components and supporting multiple measurement circuit configurations.