4275A

The Keysight (Agilent HP) 4275A is a multi-frequency, high-performance LCR meter designed for precision component testing in the high-frequency range from 10 kHz to 10 MHz. Featuring a basic accuracy of 0.1% and a flexible four-terminal pair configuration, the 4275A supports multi-spot test frequencies, adjustable test signal levels, and comprehensive secondary parameter calculations, making it ideal for both laboratory research and automated production environments.

Component Testing Impedance Analysis Material Analysis

Specifications

General

Parameter	Value
Interfaces	HP-IB (GPIB) (Option 101), External Trigger Input (Rear BNC), DC Bias Monitor Output (Rear BNC), External DC Bias Inputs (Rear panel)

Physical

Parameter	Value
Power Supply	100 V / 120 V / 220 V (±10%), 240 V (+5% to -10%), 48 to 66 Hz, <=135 VA
Operating Temperature	0 to 55 °C
Dimensions (W×H×D)	425.5 mm × 177 mm × 498 mm
Weight	15 kg
Cooling	Forced air by built-in fan

Measurement Functions

Parameter	Value
Primary Parameters	L, C, \|Z\|
Secondary Parameters	D, Q, ESR, G, X, B, Phase Angle
Equivalent Circuit Modes	Auto, Series, Parallel
Ranging Modes	Auto, Manual
Deviation Measurement Modes	Difference (Δ), Percent Difference (Δ%)
Test Terminals Configuration	Four-terminal pair configuration with guard terminal
Parameter Combinations	L-D, L-Q, L-R, L-G, C-D, C-Q, C-R, C-G, \|Z\|-theta, R-X, G-B

Test Signal

Parameter	Value
Test Frequency Range	10 kHz to 10 MHz
Standard Spot Frequencies	10 kHz, 20 kHz, 40 kHz, 100 kHz, 200 kHz, 400 kHz, 1 MHz, 2 MHz, 4 MHz, 10 MHz
Test Signal Level Range	1 mV to 1 Vrms
Test Signal Level Control	Continuously variable in 3 ranges
Frequency Accuracy	±0.01%
Source Impedance	100 Ω nominal

User Interface & Display

Parameter	Value
Self Test	Front panel initiated self-test diagnostics

Input & Output

Parameter	Value
DC Bias Monitor	Bias voltage monitor output on BNC connector for both internal and external biases

Measurement Speed & Triggering

Parameter	Value
Trigger Modes	Internal, External, Manual
Measurement Speed Modes	Normal, Fast

Measurement Accuracy

Parameter	Value
Basic Accuracy	0.1%

Measurement Ranges

Parameter	Value
Capacitance Range (C)	0.01 fF to 199.99 µF
Inductance Range (L)	0.01 nH to 19.999 H
Impedance Range (\|Z\|)	0.01 mΩ to 19.999 MΩ
Resistance Range (R, ESR)	0.01 mΩ to 19.999 MΩ
Reactance Range (X)	0.01 mΩ to 19.999 MΩ
Dissipation Factor Range (D)	0.0001 to 9.900
Quality Factor Range (Q)	0.01 to 9900
Conductance Range (G)	0.01 nS to 19.999 S
Susceptance Range (B)	0.01 nS to 19.999 S
Phase Angle Range	-180.00° to +180.00°

Correction & Calibration

Parameter	Value
Zero Correction	Open and short circuit compensation

System Options

Parameter	Value
Option 001	Internal DC Bias (0 to ±35 V continuously variable)
Option 101	HP-IB (GPIB) Interface

Power & Physical

Parameter	Value
Line Voltage Requirements	100 V, 120 V, 220 V (±10%), 240 V (+5%, -10%)
Line Frequency Range	48 Hz to 66 Hz
Warm-up Time	30 minutes

Display

Parameter	Value
Maximum Display Resolution	5-1/2 digits

Monitor Functions

Parameter	Value
Voltage Monitor Accuracy	±(10% of reading + 1 mV)
Current Monitor Accuracy	±(10% of reading + 10 µA)

Inputs & Outputs

Parameter	Value
External Trigger Input	TTL level, negative-going edge, ≥ 1 µs pulse width

Measurement Control

Parameter	Value
Cable Length Compensation Settings	0 m, 1 m

Power

Parameter	Value
Maximum Power Consumption	165 VA (with all options installed)

Environmental

Parameter	Value
Storage Temperature Range	-40 °C to +75 °C
Operating Humidity Range	≤ 95% RH @ 40 °C
Maximum Operating Altitude	4562 m (15,000 ft)

DC Bias

Parameter	Value
Option 001 DC Bias Voltage Accuracy	±(0.5% of setting + 20 mV)

Connectivity

Parameter	Value
HP-IB Interface Capability Codes	SH1, AH1, T5, L4, SR1, RL1, DC1, DT1, PP0, C0, TE0, LE0

Options

Parameter	Value
Option 002 Multi-step Signal Level	1 mV to 1.00 V rms (1 mV steps from 1 mV to 100 mV, 10 mV steps from 100 mV to 1 V)

Measurement Monitor

Parameter	Value
Voltage Monitor Range	1.00 mV to 1.00 V
Current Monitor Range	1.00 µA to 10.00 mA

Performance

Parameter	Value
Measurement Speed (Short Mode)	140 ms (at ≥100 kHz) to 190 ms (at 10 kHz)
Measurement Speed (Medium Mode)	160 ms (at ≥100 kHz) to 210 ms (at 10 kHz)
Measurement Speed (Long Mode)	280 ms (at ≥100 kHz) to 370 ms (at 10 kHz)
Test Signal Level Accuracy	±(10% + 10 mV) (at standard 0.1 V to 1.0 V levels)

Technology

Multi-Frequency LCR Meter

Applications

High-frequency electronic component and material characterization