East Tester ET44 Series

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Summary

1 Installation

1.1 Out of Box Check

Checks to confirm all items are attached to the bridge, including optional accessories.

1.2 Power connection

Instructions for connecting the power supply voltage and frequency range.

1.3 Fuses

Information about using the provided fuses for the instrument.

1.4 Ambient Environment

Conditions for optimal operation and storage, including temperature and humidity.

1.5 Test Fixture Used

Guidelines for using test fixtures and cables for accurate measurements.

1.6 Warm-up and Continuous Working Hours

Recommended warm-up time and continuous working hours for accurate measurements.

1.7 Other Characteristics of the Instrument

Power consumption and dimensions of the instrument.

2 Description

2.1 General Technical Specifications

Lists key technical specifications like supply voltage, environment, dimensions, and mass.

3 Quick Reference

3.1 Front Panel

Identifies the components and controls on the front panel of the LCR meter.

3.2 Introduction of Keys

Explains the function of various basic and directional keys on the instrument.

3.3 Introduction of Rear Panel

Identifies the connectors and power input on the rear panel.

3.4 User Interface

Describes the different interfaces of the LCR meter (measurement, setting, system).

4 Basic Function Operation

4.1 Startup & Shutdown

Instructions for starting up and shutting down the instrument.

4.2 Parameter Selection

Details how to select and adjust various measurement parameters like frequency and level.

4.2.10 Comparator Setting

Steps for setting nominal values and comparator thresholds for sorting.

4.2.11 List Scanning Function

How to perform list scanning over multiple frequencies for comparison.

4.2.12 DCR MODE

How to enter the DC resistance measurement mode.

4.2.13 Electrolytic Capacitor Mode

How to enter the electrolytic capacitor measurement mode.

4.2.14 Relative Function

How to use the relative measurement function with a reference value.

4.2.15 Data Retention Function

How to activate and deactivate the data retention function.

4.2.16 Data Recording Function (Maximum Value, Minimum Value, Average Value)

How to record and display MAX, MIN, and AVG measurement values.

4.2.17 Correction Function

Describes open circuit and short circuit correction procedures.

4.2.18 Power-on Parameter Setting

How to configure parameters that load on power-on.

5 Basic Performance Indicators

5.1 Measurement Parameter

Defines main and secondary measurement parameters and their combinations.

5.2 Equivalent Mode

Explains series and parallel equivalent circuit modes for components.

5.3 Basic Accuracy

Details the basic accuracy specifications under various conditions.

5.4 DCR MEASUREMENT ACCURACY

Accuracy specifications for DC Resistance measurements across ranges.

5.8 Measurement Display Range

Lists the display ranges for various measurement parameters.

6 External Interface Instructions

6.1 USB INTERFACE

Information about the USB communication interface for computer connection.

6.2 RS232 INTERFACE

Details the RS232 connector and pin definition.

7 SCPI COMMAND REFERENCE

Reference for SCPI commands, with contact information for details.

8 Precautions and Warranty

8.1 Packaging

Information on instrument packaging for protection against environmental factors.

8.2 Transportation

Guidelines for handling and transporting the instrument safely.

8.3 Storage

Recommended storage conditions for the instrument to maintain performance.

8.4 Warranty

Information on maintenance, repair, and warranty coverage.

The ET44 Series Benchtop Digital Bridge is a sophisticated LCR meter designed for precise component measurement and analysis. This series, exemplified by the ET4401, ET4402, and ET4410 models, integrates a 3.5-inch TFT display with a user-friendly interface, offering a comprehensive suite of features for both manual operation and remote control.

Function Description

The ET44 series benchtop digital bridge is primarily used for measuring various electrical parameters of components. It supports the measurement of inductance (L), capacitance (C), resistance (R), and impedance (Z) as main parameters. Secondary parameters include reactance (X), loss (D), quality factor (Q), impedance angle (θ), and equivalent series resistance (ESR). The device also supports DC resistance (DCR) measurement and electrolytic capacitor mode.

A key feature is its comparator function, which allows for component sorting based on user-defined nominal values and tolerance limits. This is particularly useful in production environments for quality control. The instrument can perform list scanning, enabling circulated scanning over multiple frequencies and comparison with nominal values.

Data recording capabilities include capturing maximum, minimum, and average values of measurements over a period. It also offers a data retention function to hold current measurement values. Correction functions for open circuit and short circuit are available to ensure measurement accuracy by compensating for stray admittance and residual impedance caused by test fixtures.

The device supports both series (SER) and parallel (PAR) equivalent modes, allowing users to choose the appropriate circuit model based on the component type and application. For instance, series equivalent circuits are recommended for low-value impedance elements (high-value capacitance and low-value inductance), while parallel equivalent circuits are suitable for high-value impedance elements.

Important Technical Specifications

The ET44 series boasts a basic accuracy of 0.2%. It features a 3.5-inch TFT display with 5 and a half bits for main parameter display and 5 digits for secondary parameters.

Measurement Ranges:

Inductance (L): 0.01µH to 9999H (ET4401), 0.01µH to 99.99H (ET4402), 0.01µH to 99.99H (ET4410). The display range varies with frequency, from 1µH-9999H at 100Hz-1KHz to 0.01µH-99.99H at 10KHz-100KHz.
Capacitance (C): 0.01pF to 99999µF (ET4401), 0.01pF to 99999µF (ET4402), 0.01pF to 99999µF (ET4410). The display range varies with frequency, from 0.1pF-99.999mF at 100Hz-1KHz to 0.01pF-100µF at 10KHz-100KHz.
Resistance (R): 0.0001Ω to 99.99MΩ.
Impedance (Z): 0.0001Ω to 99.99MΩ.
Reactance (X): 0.0001Ω to 99.99MΩ.
Loss (D): 0.0001 to 99999.
Quality Factor (Q): 0.0001 to 99999.
Impedance Angle (θ): -180.000deg to 180.000deg.
ESR: 0.0001Ω to 99.99MΩ.

Test Frequencies:

ET4401: 100Hz to 10kHz (10 points).
ET4402: 100Hz to 20kHz (12 points).
ET4410: 100Hz to 100kHz (20 points). Frequency accuracy is 0.02%.

Test Signal Level:

Adjustable from 100mV to 2000mV (100mV, 300mV, 600mV, 1V, 1.5V, 2V). Test signal level accuracy is 10%.

Internal Bias Voltage Output:

0-1500mV adjustable, with 1mV stepping.

Output Impedance:

Selectable between 30Ω and 100Ω. Default is 100Ω. Output impedance accuracy is 5%.

Measurement Display Speed:

Configurable to slow (2 times/second), medium (4 times/second), or fast (8 times/second).

Power Supply:

Voltage: 220V AC ± 10% or 110V AC ± 10%.
Frequency: 45-65Hz.
Power consumption: Less than 20W.

Dimensions:

265mm (W) x 105mm (H) x 305mm (L).
Mass: 2.3kg.

Communication Interfaces:

Standard: USB, RS232 (or 485), Handle interface.
Optional: GPIB, USB Host. Supports SCPI communication protocol.

Usage Features

The ET44 series is designed for ease of use with a clear front panel layout. Front Panel Controls:

Power On/Off Key: For turning the instrument on and off.
Direction Keys: Used for cursor movement and parameter selection within menus.
Basic Function Keys:
- LEVEL: Quickly switches the test signal level.
- FREG: Quickly switches the test frequency.
- RANGE: Quickly switches the test range (AUTO, 30Ω, 100Ω, etc.).
- SPEED: Quickly switches the measurement speed.
- ANULL: Toggles between normal and relative display.
- SET: Switches between "measurement display" and "system setting" interfaces.
- CAL: Enters open circuit and short circuit calibration modes.
- ENTER: Confirms selections or enters input states for parameters like bias and comparator settings.
- AUTO/R/C/L/Z: Quickly switches the main measurement parameter.
- COMPARE: Switches between Comparator Setting and Measurement Display interfaces.
- SAVE: Saves currently set comparator parameters.
- X/D/Q/θ/ESR: Quickly switches the secondary measurement parameter.
- TOL%: Quickly sets tolerance values for comparator (1%, 5%, 10%, 20%).
- HOLD: Activates data retention function.
- AUTO/SER/PAL: Quickly switches the equivalent mode (AUTO, Series, Parallel).
- -|(-: Quickly switches to electrolytic capacitor mode.
- DCR: Quickly switches to DCR DC resistance test function.
- MAX/MIN/AVG: Toggles display of maximum, minimum, and average recorded values.

User Interface: The display is organized into pages for measurement display, measurement setting, and system setting. The measurement display shows the main and secondary parameters, current settings (level, frequency, bias, range, compensation, resistance, speed, list status), and a message column for data automation/retention, relative display, and MAX/MIN/AVG labels/values.

Parameter Selection: Users can easily select test frequency, level, offset (bias), range, output impedance, and measurement speed using dedicated keys and direction buttons. The offset value can be precisely adjusted digit by digit.

Comparator Setting: The comparator allows setting a nominal value and tolerance limits. It provides visual feedback (e.g., "BIN: 1" for qualified, "OUT" for unqualified, "AUX" for secondary parameter failure) and supports five-gear sorting.

System Settings: The instrument allows configuration of language (Chinese, English), backlight brightness (30%, 50%, 70%, 100%), power-on parameter settings (default or previous value), and buzzer switch (ON/OFF).

Maintenance Features

Installation and Environment:

Out of Box Check: Users are advised to verify all standard and optional accessories upon receipt.
Power Connection: Requires 220V AC ± 10% or 110V AC ± 10% at 45-65Hz. Proper grounding is essential for safety and to prevent leakage.
Fuses: The instrument comes with fuses; users should use company-provided replacements.
Ambient Environment: Should be used in a clean, vibration-free environment, away from direct sunlight and corrosive gases. Operating temperature is 0°C to 40°C, with humidity 15% to 85%. For long-term storage, it should be kept in a ventilated room at 0°C to 40°C with humidity not exceeding 85% RH.
Electromagnetic Interference: The instrument and test leads should be kept away from strong electromagnetic fields.
Test Fixture: Only company-provided test fixtures or cables should be used to ensure accurate measurements. Fixtures and pins of tested devices must be kept clean.

Warm-up and Continuous Working Hours:

A warm-up time of at least 30 minutes is required for accurate measurements.
Continuous working hours should be less than 16 hours.
Frequent switching on/off should be avoided to prevent internal data confusion.

Correction Function: The open circuit and short circuit correction functions are crucial for maintaining measurement accuracy. These compensate for stray admittance and residual impedance introduced by the test fixture. The calibration process is guided through the interface, indicating success or failure.

Warranty: The instrument should only be maintained and repaired by professional technical personnel. Unauthorized replacement of components is not covered under warranty, and users will bear the cost of such maintenance. After any maintenance, a new measurement and calibration should be performed to ensure test accuracy.