# Agilent 4284A Precision LCR Meter (Pre-Owned)

# Agilent 4284A Precision LCR Meter (Pre-Owned)

## Key Features At A Glance

-   Test frequency range from 20 Hz to 1 MHz with 8,610 selectable frequencies and ±0.01% frequency accuracy
-   Four-terminal pair measurement configuration with selectable 0 m and 1 m test cable length (2 m and 4 m available with Option 006)
-   Basic measurement accuracy of 0.05% under specified conditions (test signal 0.3 to 1 Vrms, MEDIUM/LONG integration)
-   Comprehensive parameter set: |Z|, |Y|, L, C, R, G, D, Q, Rs, Rp, X, B, and phase angle θ with parallel and series equivalent circuit modes
-   Programmable test signal: 5 mVrms to 2 Vrms voltage or 50 µArms to 20 mArms current (extended ranges with Option 001 power amplifier/DC bias)
-   List sweep function with up to 10 programmable frequency or signal level points, plus 10-bin comparator sorting for component handling
-   GPIB interface with SCPI programming, IEEE-488.1/488.2 compliance, and buffer memory storing up to 128 measurements
-   Selectable integration times (SHORT, MEDIUM, LONG) with averaging from 1 to 256 measurements for noise/speed optimization

The Agilent 4284A Precision LCR Meter is a benchtop impedance measurement instrument covering a test frequency range from 20 Hz to 1 MHz across 8,610 selectable frequencies with ±0.01% frequency accuracy. The instrument uses a four-terminal pair measurement configuration and presents results across the parameter set |Z|, |Y|, L, C, R, G, D, Q, Rs, Rp, X, B, and phase angle θ, with parallel and series equivalent circuit models user-selectable.

Per the published specifications, the 4284A supports component characterization and incoming inspection workflows that require precise L, C, and R measurements across frequency. The included list sweep function allows up to 10 programmable frequency or test signal level points to be executed in single or sequential test, and the built-in comparator provides ten-bin sorting on the primary measurement parameter with IN/OUT decision output on the secondary parameter — supporting component sorting applications referenced in the datasheet's comparator function description.

ValueTronics International stocks, tests, and ships the Agilent 4284A from our 20,000 sq ft secure warehouse at 1675 Cambridge Drive in Elgin, Illinois. Unlike drop-ship resellers who never physically handle the instruments they sell, our technicians inspect every 4284A in-house against the manufacturer's published performance criteria before it reaches a customer's bench — which means the LCR meter you order is a unit whose condition has been verified by people you can call.

## Brand Heritage

The 4284A was originally introduced under the Hewlett-Packard brand. HP's test and measurement business was spun off as Agilent Technologies in 1999, and Agilent's electronic measurement division subsequently became Keysight Technologies in 2014. Datasheets, calibration support, and the product line for this instrument trace through that lineage.

## Accessories Supplied

-   Power cable (depends on the country where the 4284A is being used)
-   Fuse (only for Option 4284A-201, Part number 2110-0046, 2 each)

## Product Core & Specifications

Specification

Value

Measurement Functions

Measurement parameters

|Z|, |Y|, L, C, R, G, D, Q, Rs, Rp, X, B, θ

Mathematical functions

Deviation and percent of deviation from a programmable reference value

Equivalent measurement circuit

Parallel and series

Ranging

Auto and manual (hold/up/down)

Trigger

Internal, external, BUS (GPIB), and manual

Delay time

0 to 60.000 s in 1 ms steps

Measurement terminals

Four-terminal pair

Test cable length (Standard)

0 m and 1 m selectable

Test cable length (Option 4284A-006)

0 m, 1 m, 2 m, and 4 m selectable

Integration time

Short, medium, and long

Averaging

1 to 256, programmable

Test Signal

Frequency

20 Hz to 1 MHz, 8610 selectable frequencies

Frequency accuracy

±0.01%

Signal modes

Normal (non-constant) and Constant

Voltage (Non-constant)

5 mVrms to 2 Vrms, ±(10% + 1 mVrms)

Voltage (Constant)

10 mVrms to 1 Vrms, ±(6% + 1 mVrms)

Current (Non-constant)

50 µArms to 20 mArms, ±(10% + 10 µArms)

Current (Constant)

100 µArms to 10 mArms, ±(6% + 10 µArms)

Output impedance

100 Ω, ±3%

Display Range

|Z|, R, X

0.01 mΩ to 99.9999 MΩ

|Y|, G, B

0.01 nS to 99.9999 S

C

0.01 fF to 9.99999 F

L

0.01 nH to 99.9999 kH

D

0.000001 to 9.99999

Q

0.01 to 99999.9

θ

−180.000° to 180.000°

Δ

−999.999% to 999.999%

Correction Functions

Zero open

Eliminates measurement errors due to parasitic stray impedances of the test fixture

Zero short

Eliminates measurement errors due to parasitic residual impedances of the test fixture

Load

Improves measurement accuracy using a working standard (calibrated device) as a reference

List Sweep

Programmable points

Maximum of 10 frequencies or test signal levels; single or sequential test

Comparator Function

Primary parameter sorting

Ten bin sorting

Secondary parameter

IN/OUT decision output

Sorting modes

Sequential (unnested bins, absolute limits); Tolerance (nested bins, absolute or percent limits)

Bin count

0 to 999,999

List sweep comparator

HIGH/IN/LOW decision output for each point in the list sweep table

DC Bias (Standard)

DC Bias voltage

0 V, 1.5 V, and 2 V selectable

Setting accuracy

±5% (1.5 V, 2 V)

DC Bias output current

20 mA max.

Other Functions

Store/load

Ten instrument control settings (internal non-volatile memory) plus ten additional settings per removable memory card

GPIB

Complies with IEEE-488.1 and 488.2; SCPI programming language; ASCII and 64-bit binary format; buffer stores up to 128 measurements

Interface functions

SH1, AH1, T5, L4, SR1, RL1, DC1, DT1, C0, E1

Self test

Softkey controllable

Power Requirements

Line voltage

100, 120, 220 Vac ±10%, 240 Vac +5% / −10%

Line frequency

47 to 66 Hz

Power consumption

200 VA max

Operating Environment

Temperature

0 °C to 55 °C

Humidity

≤ 95% R.H. at 40 °C

Storage Environment

Temperature

−20 °C to 60 °C

Humidity

≤ 95% RH (at 40 °C)

Physical

Dimensions (W × H × D)

426 × 177 × 498 mm

Weight

Approximately 15 kg (33 lb., standard)

Display

Type

LCD dot-matrix display

Number of display digits

6 digits, maximum display count 999,999

Supplemental Performance Characteristics

Stability (|Z|, |Y|, L, C, R)

< 0.01%/day

Stability (D)

< 0.0001/day

Settling time (fm ≥ 1 kHz)

< 70 ms

Settling time (100 Hz ≤ fm < 1 kHz)

< 120 ms

Settling time (fm < 100 Hz)

< 160 ms

Input protection (max capacitor voltage)

Vmax = √(1/C) \[V\], ≤ 200 V

**Important:** Test cable length affects measurement accuracy: the published specifications apply when test cable length is set to 0 m or 1 m. For 2 m or 4 m cable operation (available only with Option 006 installed), an additional error of fm × L/2 \[%\] applies, where fm is test frequency in MHz and L is cable length in meters.**Important:** Test cable lengths of 2 m and 4 m can only be used when Option 4284A-006 is installed.**Important:** Variable DC bias voltage function requires Option 4284A-001 (Power Amplifier/DC Bias). The standard 4284A provides only 0 V, 1.5 V, and 2 V selectable DC bias.**Important:** Programmable DC bias voltages in the List Sweep function are available only when Option 4284A-001 is installed.**Important:** The 4284A controls the 42841A bias current source only when Option 4284A-002 (Bias Current Interface) is installed.**Important:** Caution: The memory card should be removed before packing the 4284A.

## About this used unit

-   Warranty included
-   Functional verification included
-   Standard Calibration Upgrade Options: No Calibration Required, NIST Traceable, Z540.1 or ISO 17025 with Data, Z540.3 Guardbanding with Data.
-   Note that unnecessary accessories may not be included (contact Test Architect to confirm).

**Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.**

## Details

- **Price:** 0.0 USD
- **Vendor:** Agilent
- **Type:** Lcr Meter
- **Tags:** Agilent, Agilent Keysight, LCR, Manufacturers, Meters & DAQ, product_manual_group_1, Product_used

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| None | 0.00 USD | In stock |
| NIST Traceable | 0.00 USD | In stock |
| NIST Traceable with Full Data | 0.00 USD | In stock |
| ISO IEC 17025 Accredited | 0.00 USD | In stock |

## Images

- 4284A Agilent LCR Meter

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> Source: [ValueTronics](https://valuetronics.com/products/4284a-agilent-lcr-meter-used)
> Updated: 2026-05-30