East Tester ET433 Handheld LCR Meter User Manual

1. Introduction

The East Tester ET43 Series handheld LCR meter is a portable, hand-held instrument designed for measuring the parameters of inductors, capacitors, resistors, and other electronic components. It features a 2.8-inch TFT display screen, easy key operation, and USB communication. Powered by a high-capacity lithium battery, it ensures long operational times. The ET433 model offers a basic accuracy of 0.2% and supports a continuously adjustable test frequency from 100Hz to 100kHz with a 1Hz step, and an adjustable test level from 10mV to 1100mV with a 1mV step. It combines the convenience of a handheld device with the performance of a table-type instrument.

Key features include automatic identification and measurement of components, internal bias voltage output (0mV-500mV), DC Resistance (DCR) measurement, electrolytic capacitance measurement, and support for screening and deviation measurement. The device also includes manual and automatic ranging, open/short circuit calibration, and multiple testing ports.

Figure 1: East Tester ET433 Handheld LCR Meter with included accessories: Kelvin test clip, power adapter, USB cable, short circuit board, and user manual.

Figure 2: East Tester ET433 Handheld Digital Bridge highlighting basic accuracy, adjustable test level, and adjustable test frequency, along with included accessories.

2. Safety Information

Warning: Always adhere to the safety instructions to prevent injury or product damage.

Do not use in explosive environments: Avoid dusty environments, direct sunlight, high humidity, strong electromagnetic radiation, or other harsh conditions.
Non-professional maintenance personnel should not open the back cover: Maintenance, component replacement, or instrument adjustment should only be performed by professional personnel. Contact the dealer or service department of Hangzhou Zhongchuang Electronics Co., Ltd. for assistance.
Do not arbitrarily break down or modify the instrument: Unauthorized modifications may prevent the instrument from recovering its performance.
Discharge Capacitors: Do not measure charged capacitors, as this may damage the instrument. Ensure all capacitors in a circuit are fully discharged before measurement.
On-board Devices: When measuring on-board devices, ensure the power is turned off. Active circuits cannot be measured directly.
Environmental Conditions: The instrument is suitable for indoor use and altitudes below 2,000 meters. For short-term outdoor use, protect it from direct sunlight, water, electromagnetic radiation, and dust.
Cleaning: Clean the instrument periodically, especially in dusty environments, to prevent dirt accumulation from affecting performance. Always shut down the instrument and remove the battery and external power supply before cleaning. Use a soft cloth and diluted neutral detergent, wiping carefully to prevent scratches. Ensure the instrument is completely dry before use. Prevent liquids from entering through test slots or keys.

Safety Symbols:

! This symbol indicates a security warning, reminding the user to follow instructions in the manual.

3. Package Contents

Upon opening the box, please verify that all components are present. If any items are missing, contact your dealer immediately.

Handheld LCR meter (lithium battery installed)
Guidance manual
CD (for USB driver software)
Mini-USB communication cable
AC power adapter
Pair of red/black rubber plugs - alligator clip test line
Short-circuit bar
Pair of 4-terminal Kelvin test clip (optional for ET430/430B, standard for other models)

4. Product Overview

4.1 Front Panel Introduction

The ET433 features a user-friendly front panel with a 2.8-inch TFT LCD screen and various keys for operation. The following diagram and descriptions detail the front panel components:

Front panel introduction of the ET433 LCR meter, with numbered labels indicating display, keys, and test ports. — Figure 3: Front panel of the ET433 LCR Meter.

Display: 2.8-inch TFT LCD screen, showing all instrument functions.
Data Holding/Recording Multifunctional Key: Short press to toggle data holding; long press to toggle data recording.
Power Key: Long press to turn the instrument on or off.
Main Parameter Shortcut Key: Quickly switch main parameters.
Relative and Correction Multifunctional Key: Short press for relative function; long press for correction function.
Secondary Parameter Shortcut Key: Quickly switch secondary parameters.
Frequency and DCR Mode Multifunctional Key: Short press to quickly switch fixed-point frequencies; long press to enter DCR mode.
Level Shortcut Key: Quickly switch fixed-point levels.
Bias Voltage and Electrolytic Capacitance Mode Multifunctional Key: Short press to enter electrolytic capacitance mode; long press to select bias voltage.
Equivalent Shortcut Key: Quickly switch equivalents.
Interface Switch Key: Quickly switch between "measurement display" and "System Settings".
Comparator Switch and Tolerance Limits Shortcut Multifunctional Key: Short press to quickly switch deviation tolerance limit; long press to toggle comparator.
Measuring Speed Shortcut Key: Quickly switch measurement speed.
Range Shortcut Key: Quickly switch measurement range.
Arrow Keys: Left/right arrows control cursor movement; up/down arrows select parameters.
Enter Key: Confirm parameter or function selection.
5-Terminal Test Notch
3-Terminal Test Jack

4.2 Test Ports

The ET43 Series utilizes both 3-terminal and 5-terminal test ports to offer convenience and high accuracy. The 3-terminal test port uses standard rubber jacks, allowing for inexpensive rubber plug-alligator clip test lines, which are convenient for extended tests but may have lower accuracy. For improved accuracy, especially with extension lines, the 5-terminal test notch supports dedicated test fixtures for complete four-terminal measurements.

Diagram illustrating the 3-terminal and 5-terminal test ports on the ET433 LCR meter. — Figure 4: Test port diagram.

5. Setup

5.1 Initial Charging

The ET433 is equipped with a built-in 3000mAh rechargeable lithium battery. Before first use, or if the battery is low, connect the device to the power adapter using the Mini-USB cable. The internal battery power supply circuit will automatically cut off when an external power supply is detected, and the battery will begin charging. The charging control functions normally even when the instrument is turned off.

Image showing the Micro USB charging port and details about the built-in 3000mAh rechargeable battery. — Figure 5: Micro USB Charging Port and Built-in Rechargeable Battery.

5.2 Connecting to a PC

To connect the instrument to a PC for remote control or data acquisition:

Locate the USB driver software on the included CD.
Use the Mini-USB cable to connect the instrument to a USB port on your PC.
Press and hold the power key to start the instrument.
Install the USB driver software on your PC.
After installation, verify the serial number in Windows' Device Manager.

The ET43 Series uses SCPI commands for communication via a virtual serial port. Refer to the communication protocol of ET43 for specific commands.

6. Operation Instructions

6.1 Startup and Shutdown

Startup: Long press the power key (button 3 on the front panel) to turn on the instrument. The measurement interface will be displayed by default.
Shutdown: Press and hold the power key for more than 2 seconds to turn off the instrument.

6.2 Measurement Interface

The measurement interface displays key information such as frequency, range, level, bias, and measurement results. The status bar provides additional indicators like USB connection status, automatic parameter mode, measurement speed, and battery level.

Example of the measurement interface on the ET433 LCR meter's 2.8-inch TFT LCD screen, showing capacitance measurement. — Figure 6: Measurement interface example.

6.3 System Settings Interface

To access system settings, use the interface switch key (button 11). Here, you can view the product model, serial number, and version. You can also configure language, automatic power-off, screen brightness, power-on settings, and buzzer.

6.4 Parameter Selection

The ET433 allows for precise control over measurement parameters:

Frequency: Press the FREQ key (button 7) to cycle through fixed frequencies, or use arrow keys to select and adjust continuously (ET433: 100Hz-100kHz, 1Hz step).
Level: Press the LEVEL key (button 8) to cycle through fixed test signal levels (ET433: 10mV-1100mV, 1mV step).
Internal Bias: The ET433 offers an internal bias of 0-500mV with 1mV stepping. Long press the bias voltage key (button 9) to select and adjust.
Range: Press the RANGE key (button 14) to switch between automatic and manual ranges.
Main Parameters (L/C/R/Z): Press the AUTO/R/C/L/Z key (button 4) to switch between Resistance (R), Capacitance (C), Inductance (L), Impedance (Z), and AUTO mode.
Secondary Parameters (X/D/Q/θ/ESR): Press the secondary parameter key (button 6) to select Loss (D), Quality Factor (Q), Phase Angle (θ), Equivalent Series Resistance (ESR), or Reactance (X).
Tolerance: Short press TOL% (button 12) to switch deviation tolerance limits (1%, 5%, 10%, 20%). Long press to open/close the comparator.
Nominal Value: Set the nominal value for comparison by placing the component, turning on the comparator, and adjusting the nominal value using arrow keys and ENTER.
Equivalent Model (SER/PAL): Press AUTO/SER/PAL to switch between series (SER) and parallel (PAL) equivalent models.

6.5 Special Functions

DCR Mode: Long press the FREQ key (button 7) to enter DCR (DC Resistance) mode.
Electrolytic Capacitance Mode: Short press the bias voltage key (button 9) to enter electrolytic capacitance mode.
Relative Mode: Short press NULL (button 5) to activate the relative function, using the current reading as a reference.
Data Recording Function: Long press HOLD (button 2) to turn on data recording. Short press HOLD to cycle through maximum, minimum, and average values. Long press again to turn off.
Comparator Function: Used for screening components based on set tolerance limits.
Correction Function: Press NULL (button 5) to enter the correction interface. The instrument will identify open or short circuits. Short press NULL again to perform open or short circuit correction. This reduces errors from distributed parameters of the test line.

Figure 7: Detailed explanation of LCR Test Port, DCR Mode, Electrolytic Capacitance Mode, and Data Recording Function.

Figure 8: Detailed explanation of parameter selection functions: Main Parameters, Secondary Parameters, Comparison Function, and Correction Function.

6.6 Measurement Procedures (Examples)

Before any measurement, ensure the instrument is powered on and, if necessary, perform open/short circuit correction for optimal accuracy.

Animated diagram showing different measuring wiring methods for resistance, capacitance, and inductance, including Kelvin test clamp. — Figure 9: Measuring wiring methods for Resistance, Capacitance, and Inductance, including Kelvin test clamp.

Resistance Measurement:
1. Press AUTO/R/C/L/Z until 'Rs' is displayed.
2. Insert the resistor into the test notch or connect it using appropriate test accessories (alligator clips, Kelvin test fixture).
3. Select the desired test frequency and level using FREQ and LEVEL.
4. Read the measurement results from the screen.
Capacitance Measurement:
Warning: Ensure the capacitor is fully discharged before testing. Large capacitors may require longer discharge times. Connecting a charged capacitor can damage the instrument.
1. Press AUTO/R/C/L/Z until 'Cs' is displayed.
2. Insert the capacitor into the test notch or connect it using appropriate test accessories.
3. Select the desired test frequency and level using FREQ and LEVEL.
4. Read the measurement results from the screen.
Inductance Measurement:
1. Press AUTO/R/C/L/Z until 'Ls' is displayed.
2. Insert the inductor into the test notch or connect it using appropriate test accessories.
3. Select the desired test frequency and level using FREQ and LEVEL.
4. Read the measurement results from the screen.
Impedance Measurement:
1. Press AUTO/R/C/L/Z until 'Zs' is displayed.
2. Insert the component into the test notch or connect it using appropriate test accessories.
3. Select the desired test frequency and level using FREQ and LEVEL.
4. Read the measurement results from the screen.

7. Telecommunication

The ET43 Series handheld LCR meter can be connected to a PC via its Mini-USB interface. After installing the necessary drivers, the instrument can be controlled remotely, and test results can be acquired through a virtual serial port. The device supports SCPI (Standard Commands for Programmable Instruments) communication protocol, allowing for programmatic control and data exchange.

Virtual Serial Port Configuration:

Baud rate: 9600 or others
Data bits: 8
Check: None
Stop bit: 1
Flow Control: None

When the instrument receives a remote operation instruction, it enters remote control state, indicated by "RMT" on the LCD. To exit, send the "SYSTem: LOCal" command.

8. Specifications

8.1 General Parameters (ET433)

Parameter	Value
Test Frequency	100Hz-100KHz, Continuously adjustable, 1Hz step
Basic Accuracy	0.2%
Display Screen	2.8" TFT LCD screen
Number of Display Digits	Principal parameter: 5 digit, Secondary parameter: 5 digit
Measured Parameter	Principal: L/C/R/Z, Secondary: X/D/Q/θ/ESR
Electrolytic Capacitor Mode	Yes
DCR Mode	Yes
Measurement Range	L: 0.000µH~2000H, C: 0.000pF~20.000mF, R: 0.0001Ω~20.000MΩ
Measuring Display Speed	1 time/s (slow), 2 times/s (medium), 4 times/s (fast)
Internal Bias	0-500mV adjustable, 1mV step
Testing Level	0-1V adjustable
Calibration Function	Open circuit calibration, short circuit calibration
Screening Function	Limit range 1%-50%, fixed points: 1%, 5%, 10%, 20%
Deviation Measurement	Compares component deviation percentage to set nominal value
Other Features	Adjustable backlight brightness, Chinese/English language, USB device, automatic power-off
Standard Configuration	Mini-USB cable, Power adapter, Short circuit bar, Red/black rubber plug, High capacity lithium battery, Kelvin clips
Dimensions	27022070mm (Product package)
Operating Temperature	0 - 40 ℃

For detailed accuracy indicators, including specific ranges for capacitance, inductance, and impedance at various frequencies and test levels, please refer to the comprehensive user manual (PDF) available from the manufacturer.

Comparison table of ET430B, ET430, ET431, ET432, and ET433 models, detailing test frequency, accuracy, features, and display. — Figure 10: Comparison table of ET43 Series models.

Dimensions of the ET433 LCR meter (188mm x 90mm x 33mm). — Figure 11: Machine dimensions.

9. Maintenance

Warning: Do not attempt to repair the instrument yourself; it must be maintained and repaired by professionals. Keep the instrument away from liquids and do not leave conductive objects inside.

9.1 Overhaul

If the equipment fails to switch on, first check the battery and external power supply, and the power jack. Verify if any keys are stuck or unresponsive. If test results are abnormal, inspect the test accessories for issues and check for damage to the spring in the test notch. Review the manual to confirm correct operation. Do not replace components or specific parts arbitrarily; contact the dealer or service company for unconfirmed problems.

9.2 Cleaning

Before cleaning, always shut down the instrument and remove the battery and external power supply. Prevent water or other liquids from entering the instrument through test slots, keys, or other joints. If accidental liquid entry occurs, immediately stop using it and remove the power supply and battery. Clean with a soft cloth and diluted neutral detergent, carefully wiping dirty parts to prevent scratches. Ensure the instrument is completely dry before use.

Image showing the ET433 LCR meter with its environmental protection silicone sleeve, highlighting dustproof and shockproof features. — Figure 12: Environmental protection silicone sleeve.

10. Troubleshooting

Instrument does not power on: Check if the battery is charged. Ensure the power adapter is correctly connected and functioning.
"Battery power is low!" message: This indicates the battery needs charging. Connect the device to the power adapter using the Mini-USB cable.
Abnormal test results: Verify that the test accessories (alligator clips, Kelvin test fixture) are properly connected and not damaged. Ensure the component is correctly inserted into the test notch. Perform open/short circuit correction if necessary.
Display issues: Check screen brightness settings in the System Settings interface.
Communication issues with PC: Ensure USB drivers are correctly installed and the Mini-USB cable is securely connected.

LCR meter display showing 'Battery power is low!' message. — Figure 13: "Battery power is low!" warning on display.

11. User Tips

Inspect Packaging: Upon receiving your LCR meter, carefully inspect the packaging for any damage. Although the product itself is robust, damaged packaging could indicate potential issues.
Initial Charge: For optimal performance and battery longevity, ensure the device is fully charged before its first use.
Utilize the Kickstand: The ET433 features a hidden retractable bracket on its back. Extend this kickstand for convenient desktop use, allowing for hands-free operation and improved work efficiency.
Keep User Manual Handy: While this document provides essential information, the full user manual (PDF) contains detailed accuracy tables and advanced features. Keep it accessible for reference.

Image illustrating the hidden retractable bracket on the back of the LCR meter. — Figure 14: Hidden retractable bracket for convenient use.

12. Warranty and Support

For warranty information, technical support, or service inquiries, please contact your original point of purchase or the manufacturer, Hangzhou Zhongchuang Electronics Co., Ltd. Ensure you have your product model and serial number available when seeking support.