The HP 4274A is a classic, high-performance multi-frequency LCR meter designed for highly accurate component and material impedance measurements in the 100 Hz to 100 kHz frequency range. It offers a basic accuracy of 0.1%, 13 spot test frequencies in a 1-2-4-10 sequence, and a continuously variable test signal level from 1 mV to 5 Vrms.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | GPIB (HP-IB) (Option 101) |
| Display | Dual LED numeric displays with Normal (4-1/2 digit, 19999 count) and High Resolution (5-1/2 digit, 199999 count) modes |
| Warm-up Time | 30 minutes |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 100, 120, 220, 240 V AC ±10%, 48-66 Hz |
| Operating Temperature | 0 to 55 °C |
| Dimensions (W×H×D) | 425.5 mm × 177 mm × 498 mm |
Measurement Parameters & Functions
| Parameter | Value |
|---|---|
| Primary Measurement Parameters | L, C, |Z| |
| Secondary Measurement Parameters | D, Q, ESR, G, X, B, Phase Angle (θ) |
| Equivalent Circuit Modes | Auto, Series, Parallel (with parameter combinations) |
| Deviation Measurement Modes | Deviation (Δ) and Percent Deviation (Δ%) for C, L, and |Z| |
| Self-Test Capability | Built-in automatic self-test routine |
Calibration & Compensation
| Parameter | Value |
|---|---|
| Offset Compensation | Front-panel zero adjustment for stray capacitance, residual inductance, resistance, and conductance |
Test Signal Characteristics
| Parameter | Value |
|---|---|
| Test Frequency Range | 100 Hz to 100 kHz |
| Test Frequencies | 11 spot frequencies (14 with Option 002) |
| Test Signal Voltage Range | 1 mV to 5 Vrms |
| Test Signal Level Control | Continuously variable across 4 ranges |
| Test Signal Monitor | displays applied voltage or current |
Measurement Speed & Accuracy
| Parameter | Value |
|---|---|
| Basic Impedance Accuracy | 0.1% |
DC Bias Source
| Parameter | Value |
|---|---|
| External DC Bias Input | Two rear panel connectors supporting up to ±200 V |
| DC Bias Monitor Output | Rear-panel BNC connector for monitoring internal bias voltage |
Hardware Interfaces & Connectivity
| Parameter | Value |
|---|---|
| Trigger Sources | Internal, External, or Manual |
| Test Port Configuration | Four-Terminal Pair Configuration (BNC front-panel terminals) |
Supported Configurations & Accessories
| Parameter | Value |
|---|---|
| Internal DC Bias Option | Option 001 (provides internal DC bias 0 to ±35 V) |
DC Bias
| Parameter | Value |
|---|---|
| Option 001 DC Bias Range | 0 to ±35.0 V |
Measurement Support
| Parameter | Value |
|---|---|
| Test Cable Length Compensation | 0 m, 1 m |
| Measurement Range Control | Auto and Manual |
| Equivalent Circuit Selection | Auto, Series, Parallel |
Power
| Parameter | Value |
|---|---|
| AC Power Requirements | 100 V / 120 V / 220 V / 240 V ±10%, 48 to 66 Hz |
| Maximum Power Consumption | 100 VA |
Environmental
| Parameter | Value |
|---|---|
| Operating Humidity Range | ≤ 95% RH @ 40 °C |
Measurement Performance
| Parameter | Value |
|---|---|
| Frequency Accuracy | ±0.01% |
| Measurement Speed Modes | Short, Normal |
| Typical Measurement Time (Short) | approx. 140 ms (at ≥ 1 kHz) |
| Typical Measurement Time (Normal) | approx. 210 ms (at ≥ 1 kHz) |
Display & Indication
| Parameter | Value |
|---|---|
| Display Resolution | 4.5 digits (normal), 5.5 digits (high-resolution mode) |
Measurement Range
| Parameter | Value |
|---|---|
| Dissipation Factor (D) Measurement Range | 0.0001 to 9.999 |
| Quality Factor (Q) Measurement Range | 0.01 to 9900 |
Options
| Parameter | Value |
|---|---|
| Option 101 Interface | HP-IB (GPIB) Interface |
Technology
Auto-balancing bridge
Applications
Precision passive component testing, material impedance analysis, quality assurance, and research & development
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