Recently bought an LCR bridge to round out my lab gear; went with the Zhongchuang ET4410—better bang for the buck.
1199 yuan on PDD. It seems the Victor VC4090C is also OEM’d by Zhongchuang.
Electronics / MCU discussion group: 2169025065
ET4410 Overview
This series of LCR digital bridges is a component-parameter analyzer built on the auto-balanced bridge principle. With a 10 Hz–100 kHz test bandwidth, continuously adjustable frequency, 0.2 % basic accuracy and built-in binning function, it delivers accurate, complete measurements for most components and materials—ideal for R&D, incoming inspection, and in-line sorting.
Key features:
● Max. 100 kHz test frequency, 1 Hz steps (ET4410: 16 fixed points, not continuous)
● Test level 10–2000 mV, 1 mV steps (ET4410: 6 fixed levels, not continuous)
● DC resistance (DCR) and electrolytic-capacitor modes
● Internal bias 10 mV–1.5 V
● 3.5-in TFT, 5-digit readout
● Interfaces: USB Device, RS232 (or 485), Handler, optional GPIB & USB Host
● Data logging (max / min / avg)
● SCPI protocol support
● Chinese / English UI, buzzer, brightness, etc.
● Basic accuracy 0.2 % (manual says 0.1 %—not sure which is right)
● Manual & auto ranging
● Open / short calibration
● 5-bin sorting & alarm
Main specs:
General specs:
● Supply: 220 V AC ±10 % or 110 V AC ±10 %, 45–65 Hz
● Power: <10 W
● Display: 3.5-in TFT, 480×320, 16 M-color
● Temp: operating 10 °C–40 °C, storage –10 °C–60 °C
● Humidity: ≤90 % RH up to 40 °C
● Interfaces: standard RS232/485, USB Device, Handler; optional GPIB, USB Host
● Weight: 2.1 kg
Standard accessories:
● 3-core power cord (30A51)
● Four-terminal Kelvin test cable (35A51)
Optional accessories:
● GPIB cable (32P01)
● RS232 cable (32P04)
● USB cable (32P05)
● 2 m / 4 m test cables (35P01)
● Lead-type Kelvin clips (35A52)
● SMD tweezers (35P02)
● LCR probe / 4-wire SMD clips (35P03)
● Four-terminal Kelvin fixture
● Gold-plated shorting plate (35A53)
Hangzhou Zhongchuang official site: https://url.zeruns.com/AbnPc
ET4410 PDD purchase link: https://p.pinduoduo.com/cyrO5Mdm
ET4410 JD purchase link: https://u.jd.com/jiplXbc
ET4410 Taobao purchase link: https://s.click.taobao.com/RaYNQyt
Zhongchuang’s site has no docs, so I grabbed some from Victor—they’re interchangeable.
VICTOR 4090 series bench LCR manual (same as Zhongchuang ET44): https://www.123pan.com/s/2Y9Djv-WpcvH.html
VICTOR 4090/4091 drivers & comms protocol: https://www.123pan.com/s/2Y9Djv-NpcvH.html
Unboxing
Front of carton
Open box: accessories on the left, bridge on the right
Contents: Kelvin clips, power cord, manual
Manual / operation booklet
Front panel
Side view
Rear panel
Calibration
Short calibration
Open calibration
Testing
Measured a 5 mΩ current-sense resistor—reading looks off; low-ohms accuracy is so-so.
100 mΩ Constantan wire—spot on.
13 kΩ 1 % 0805 resistor: 13.002 kΩ—very accurate.
Electrolytic mode on a “Rubycon” 220 µF 63 V cap (authenticity unknown), 1 kHz: 212.95 µF, D = 0.0931.
47 nF monolithic: 47.98 nF, D = 0.0142.
220 µF electrolytic: 208.1 µF, D = 0.0303.
22 µH toroid inductor: 22.52 µH, Q = 19.72.
DCR mode on the same toroid: 0.009 Ω DC resistance.
2.5 mH isolation-transformer winding at 100 kHz: 2.6366 mH, Q = 1.652; other winding scoped—nice 100 kHz sine.
List-scan mode had a bug—readings differed from normal mode. Reported to support; now fixed. Firmware updater: https://blog.zeruns.com/archives/774.html
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