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LCR Precision Meter
LCR Precision Meter

LCR Meter with Test Signal Monitor (Key Lock Function)

ID: GT00VT00ZW
Category:

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Overview

GAOTek LCR Meter with Test Signal Monitor (Key Lock Function) comes with a wide frequency range (50 Hz~100 kHz, 16 points) and tests signal levels (0.01 Vrms to 2.00 V rms). This instrument with a color LCD screen has a built-in comparator which allows it to output comparison/decision results for sorting components into a maximum of ten files and 14 bins. It offers auto range with 9 ranges, 30 Ω or 100 Ω constant output impedance and an easy-to-use operation system; moreover, the built-in RS-232C and handler interfaces help build an automatic component test system allowing for testing, sorting, and quality-control data processing. Its list sweep function permits entry of up to 10 frequencies or test signal levels points to be automatically measured.

Key Features

  • 3.5 in TFT-LCD display
  • Measurement frequency: 50 Hz~100 kHz (16 points)
  • Built-in comparator, 10 bins sorting
  • Built in RS-232C and Handler
  • Measurement parameter: L, C, R, Z, D, Q, θ (deg), θ (rad), Vm, Im
  • Measurement Level: 0.01 V~2.00 V programming
  • Measurement Speed: 4 times/second, 9 times/second, 30 times/second
  • Basic Accuracy: 0.05 %
  • OPEN/SHORT correction function
  • Optional USB interface
  • Key lock function

Technical Specifications

Parameters Cs-Rs, Cs-D, Cp-Rp, Cp-D, Lp-Rp, Lp-Q, Ls-Rs, Ls-Q, G-B, R-X, Z-θ rad, Z-θ deg
Monitor Parameters Z, D, Q, θr, θd, R, X, G, B, Y, Vac, Iac, Δ, Δ%
Accuracy 0.05 %
Frequency 50 Hz~100 kHz
Display Range D,Q: 0.00001 – 999999 Δ%: -999999% – 999999%WL: 0.00001 μH-999999H C: 0.00001 pF – 999999 μF R,Z: 0.00001 Ω – 99.9999 MΩ
Source Resistance 30 Ω, 50 Ω, 100 Ω
Range 9 ranges Automatic, Manual, Nominal
Display Max principle parameter: 999999; sub parameter: 99999
Signal Level 0.01 V – 2.00 V (10 mV Step)
Speed 30 t/s, 10 t/s, 6 t/s, 3 t/s 1 – 256 times average is available
Comparator 14-bin sorting, 10-bin GD, 1-bin NG, 1-bin AUX, 2-bin principle parameter NG
Adjustment Open/Short sweep frequency reset, 3 point frequency and load correction
Files 10 group files to save users’ setting, 1 group system data save real-time
Interface RS-232C, Ex-Handler Interface, with standard USB disc interface (article 10000 data)
  LCR automatic selection, keypad lock, SCPI instruction set, true-color TFT-LCD display
Dimensions (W x H x D) Weight 10.39 in x 4.21 in x 13.78 in (264 mm x 107 mm x 350 mm)

8.81 lbs (4 kg)

Temperature Range Humidity 59 °F~95 °F (15℃~35℃)

80% RH or less

 

Storage Temperature  Humidity Range 50 °F~104 °F (10 ℃~40 ℃)

10 % RH~90 % RH

Power Supply Voltage: 90 V AC – 250 V AC Frequency: 50 Hz – 60 Hz Power: Max 20 VA

Unpacking & Removing Handle

Cleaning

  • To prevent electrical shock, disconnect the power cable from the receptacle before cleaning.
  • Use a dry cloth or a cloth slightly dipped in water to clean the casing.
  • Do not attempt to clean the it internally.

WARNING: Don’t Use Organic Solvents (such as alcohol or gasoline) to clean the Instrument.

Front Panel

Front panel description

No. Description
1 USB Disk Port (USB-Host)
2 Trigger Key
3 Power Switch
4 System Key (Include File, System and Key Lock)
5 Soft Key
6 Menu Key
7 UNKNOWN Terminal
8 Enter Key
9 Cursor Key
10 LCD Display

Rear Panel

Rear panel description

No. Description
1 Frame Terminal
2 Option Slot
3 Power Cable Receptacle(Outlet) (to LINE)
4 RS-232C Interface
5 Handler Interface

Ranging    

Auto, Hold and Nominal range. Total 9 Ranges.

Measurement Speed    

Fast: 30 readers per second;

Medium 2: 10 readers per second;

Medium 1: 5 readers per second;

Slow: 1.5 readers per second.

Simultaneously, you can specify the averaging factor within the range of 1 to 256 in steps of 1 Averaging Factor to improve performance.

Trigger Mode     

Include Internal, Manual, External and Bus Trigger.

Main Functions

Correction Function

OPEN/SHORT correction

Eliminates measurement errors due to stray parasitic impedance in the test fixtures.

LOAD correction

Improves measurement accuracy by using a calibrated device as a reference.

Comparator Function (Sorting)

Bin sort

The primary parameter can be sorted into BIN1-BIN9, AUX, OUT and HI/IN/LO for each of the primary measurement parameters.

The sequential mode or tolerance mode can be selected as the sorting mode.

Limit Setup

Absolute value, deviation value, and % deviation value can be used for setup.

BIN count

Countable from 0 to 999999

List Sweep

Points 

There is a maximum of 10 points

Sweep parameter

Test frequency, test signal voltage

Comparator function of list sweep

The comparator function enables you to set one pair of lower and upper limits for each measurement point.

You can select from: Judge with the first sweep parameter/Judge with the second parameter/not used for each pair of limits.

Measurement Assistance Functions

Files:

Up to 10 set-up conditions can be written to or read from the built-in non-volatile memory.

Key Lock:

The front panel keys can be locked.

RS-232

Complies with SCPI

Options

USB host Port

Universal serial bus jack, type-A (4 contact positions, contact 1 is on your left);

Female: Connection to USB memory device

Power On/Off

Power On

Press the power key for at least 2 seconds. Release power key until the Trig’ed LED is lit.

Power Off

Press the power key for at least 2 seconds. The device will shut down when you release the power key. No operation voltages are applied to the instruments.

Warmup Time

The device is ready for use as soon as the power-up sequence is completed. However, to achieve the accuracy rating, warm up the instrument for 30 minutes.

 Connect to Device under Test (DUT)

GT00VT00ZW uses a four terminal measurement configuration that provides easy, accurate and stable measurements and avoids mutual inductance, interference from measurement signals, noise and other factors inherent with other types of connections.

  Do not apply DC voltage or current to the UNKNOWN terminals. Applying DC voltage or current may lead to device failure.
Connect the measurement sample (DUT) to the test port (or the test fixture, cables, etc. connected to the test port) after the LCR meter has been completely discharged.

Measurement Controls

<MEAS DISPLAY> Page   

Press the [Meas] key, the <MEAS DISPLAY> page appears on the screen.

The following measurement controls can be set.

  • FUNC – Measurement Function
  • RANGE – Impedance range
  • FREQ – Test Frequency
  • TRIG – Trigger Mode
  • LEVEL – Test Signal Level
  • SPEED – Meas Speed

Measurement Function [FUNC]

The device simultaneously measures four components of the complex impedance (parameters) in a measurement cycle. These include primary parameter, secondary parameter and two monitor parameter.

NOTE:

The monitor parameters can be set in <SETUP> page.

The monitor parameters are initially set to OFF.

The combinations of measurement parameters

Cs-Rs Cs-D Cp-Rp Cp-D
Lp-Rp Lp-Q Ls-Rs Ls-Q
R-Q R-X Z- θr Z- θd

Monitor parameters

Z D Q
θr θd R X
G B Y
Vac Iac
Δ Δ%

Measurement and Monitor Parameters:

Parameter Description
Cs Capacitance value measured using the series equivalent circuit model
Cp Capacitance value measured using the parallel equivalent circuit model
Ls Inductance value measured using the series equivalent circuit model
Lp Inductance value measured using the parallel equivalent circuit model
Rs Equivalent series resistance measured using the series equivalent circuit model (ESR)
Rp Equivalent parallel resistance measured using the parallel equivalent circuit model
Z Absolute value of impedance
Y Absolute value of admittance
G Conductance
B Sustenance
R Resistance (=Rs)
X Reactance
D Dissipation factor
Q Quality factor(=1/D)
θr Phase radian
θd Phase angle
Vac Test signal Voltage
Iac Test signal Current
Δ Absolute deviation value
Δ% Relative deviation value

Procedure for setting the measurement function [FUNC]

Step 1. Press the [Meas] key

Step 2. Press the <MEAS DISPLAY> soft key

Step 3. Use the cursor key to select [FUNC] field

Step 4. Use the soft keys to select measurement function

Impedance Range  [RANGE]

Mode Function Overview Advantage Disadvantage
Auto range Sets the optimum range automatic for the impedance for the DUT Automatic selection of range The measurement time is longer due to the ranging time
Hold range Measurement is performed with a fixed impedance range No ranging time is required Select a proper range depending on the value of the DUT
Nominal Range sets the optimum range depending on the nominal value Automatic selection of range. No ranging time is required

 

Valid only in the sorting mode

Available impedance range

The hold range has nine impedance ranges: 10 Ω, 30 Ω, 100 Ω, 300 Ω, 1 kΩ, 3 kΩ, 10 kΩ, 30 kΩ and 100 kΩ. The impedance range is selected according to the DUT’s impedance even if the measurement parameter is capacitance or inductance.

Range No. Impedance range Effective measurement range
8 10 Ω 0 – 10 Ω
7 30 Ω 10 Ω – 100 Ω
6 100 Ω 100 Ω – 316 Ω
5 300 Ω 316 Ω – 1 kΩ
4 1 kΩ 1 kΩ- 3.16 kΩ
3 3 kΩ 3.16 kΩ – 10 kΩ
2 10 kΩ 10 kΩ – 31.6 kΩ
1 30 kΩ 31.6 kΩ – 100 kΩ (∞)
0 100 kΩ 100 kΩ (-∞)

Procedure for setting the impedance range [RANGE]

Step 1. Press the [Meas] key

Step 2. Use the cursor key to select [RANGE] field

Step 3. Use the soft keys to select the impedance range mode or impedance range.

Soft key Function

AUTO RANGE

HOLD RANGE

NORMINAL RANGE

INCR + Increments the impedance range in the HOLD mode

DECR – Decrements the impedance range in the HOLD mode

Procedure for setting test frequency [FREQ]

Step 1. Press the [Meas] key

Step 2. Use the cursor key to select [FREQ] field

Step 3. Use the soft keys or numeric entry keys to enter the test frequency.

When data is entered with the numeric keys, the soft keys change to unit labels (Hz, kHz)

Test Frequency that can be set using INCR+/DECRINCR+/ for the device

INCR+/DECR – (Hz)      
50 Hz 60 Hz 100 Hz 20 Hz
200 Hz 400 Hz 500 Hz 1 kHz
2 kHZ 4 kHz 5 kHz 10 kHz
20 kHz 40 kHz 50 kHz 100 kHz

Test Frequency Points: [16 Points] 50, 60, 100, 120, 200, 400, 500, 1e3, 2e3, 4e3, 5e3, 10e3, 20e3, 40e3, 50e3, 100e3

Trigger Mode [TRIG]

The device supports four trigger modes: INT (internal), EXT (external), MAN (manual).

Procedure for choosing trigger mode [TRIG]

Step 1. Press the [Meas] key

Step 2. Use the cursor key to select [TRIG] field

Step 3. Use the soft keys to select desired trigger mode.

Test Signal Voltage Level [LEVEL]

The test signal voltage level can be set as the effective value (RMS value) of a sine wave of the test frequency from the unit’s internal oscillator.

The output impedance can be set to 30 Ω, 50 Ω or 100 Ω.

Test signal level setting procedure

Step 1. Press the [Meas] key

Step 2. Use the cursor key to select [LEVEL] field

Step 3. Use the soft keys or numeric entry keys to enter the test signal voltage level.

Measurement Speed [SPEED]

SLOW, MED 1, MED 2 and FAST can be selected.

SLOW mode will result in more stable and accurate measurement result.

Procedure for setting measurement speed mode

Step 1. Press the [Meas] key

Step 2. Use the cursor key to select [SPEED] field

Step 3. Use the soft keys to set measurement speed

<BIN No. DISPLAY> Page

When [Meas] key and [BIN No.] soft key are pressed, the <BIN No. DISPLAY> page appears. The bin sorting results are displayed in larger characters while the measurement results are shown in normal characters.

This page provides the following information:

  • FUNC, RANGE, FREQ, LEVEL, TRIG, LEVEL, SPEED: These conditions can be set from <MEAS DISPLAY> page.
  • Comparator function ON/OFF [COMP]
  • Auxiliary bin ON/OFF [AUX]

<BIN COUNT DISPLAY> page

When the [Meas] key and [BIN COUNT] soft key are pressed, the <BIN COUNT DISPLAY >page appears. This page provides the following information:

Counter function [COUNT]

Counter Function [COUNT]

The number of devices sorted into each bin is counted while unit sorts the devices into appropriate bins using the comparator function.

The maximum count is 999999, the counting operation stops and the overflow message “——” appears when this value is reached.

Set the Counter:

Step 1. Press the [Meas] key

Step 2. Press the <MEAS DISPLAY> soft key

Step 3. Use the cursor key to select [COUNT] field

Step 4. Use the soft keys to set counter function

RESET COUNT – The counter is reset when this key pressed.

Comparator Function ON/OFF

Built-in comparator can sort devices into a maximum of 10 bins (BIN1 to BIN9 and OUT) using a maximum of nine pairs of primary parameter limits and one pair of secondary parameter limits.  The device which is primary parameter is within limits, but is not in secondary parameter can be sorted into an auxiliary BIN (AUX).

Procedure for setting the comparator function [COMP]

Step 1. Press the [Meas] key

Step 2. Press the <MEAS DISPLAY> soft key

Step 3. Use the cursor key to select [COMP] field

Step 4. Use the soft keys to turn on/off the comparator

Procedure for turning ON/OFF the auxiliary bin [AUX]

Step 1. Press the [Meas] key

Step 2. Press the <MEAS DISPLAY> soft key

Step 3. Use the cursor key to select [AUX] field

Step 4. Use the soft keys to turn on/off the auxiliary bin

<LIST SWEEP SETUP> Page

To open the <LIST SWEEP SETUP> page press the [Setup] and [LIST SETUP] soft key. This LCR meter can perform automatic sweep measurement by sweeping the frequency and the signal level through a maximum of 10 sweep points.

Following information can be configured in the <<LIST SWEEP SETUP> page.

  • Sweep trigger mode [TRIG]
  • Sweep parameter selection [FREQ [Hz], LEVEL [V]]
  • Limit parameter selection [LMT]
  • Lower and upper limits [LOW] [HIGH]

Trig Mode Function
INT Internal Trigger. All ten sweep points are swept continuously.
MAN Manual Trigger. Each time the instrument is triggered by [Tg] key, the sweep points are swept one by one.
EXT External Trigger. Each time the instrument is triggered by the handler trigger pin, the sweep points are swept one by one.
BUS BUS Trigger. Each time the instrument is triggered by SCPI command, the sweep points are swept one by one.

 <SYSTEM CONFIG> Page

When the [Meas] or [Setup] key is pressed followed by [SYSTEM] bottom soft key, the <SYSTEM CONFIG> page appears.

Following information can be configured in the <SYSTEM CONFIG> page.

  • [LANGUAGE]
  • System date and time configuration [DATE/TIME]
  • Account settings [ACCOUNT]
  • Beep setting [BEEP]
  • Beep tone [TONE]
  • RS-232 Baud rate setting [BAUD]

<CORRECTION> Page

When you press [Setup] key and [CORRECTION] soft key, the <CORRECTION> page appears.

  • In this page, the OPEN/SHORT/LOAD correction for correcting the stray admittance and residual impedances can be performed.
  • The correction function has two kinds of correction methods. In one method the open and short correction can be performed at all of the frequency points using the interpolation method, and in the other method the open, short, and load correction can be performed at the frequency points you specify.

In <CORRECTION> page, you can configure each of the following controls with the cursor placed in the corresponding field.

  • Open correction [OPEN]
  • Short correction [SHORT]
  • Load correction [LOAD]
  • Frequency 1, 2, 3 for OPEN, SHORT, LOAD Correction [FREQ 1] [FREQ 2] [FREQ3]

<CORRECTION> Page

Open correction [OPEN]

OPEN correction capability cancels errors due to the stray admittance (G,B) in parallel with the device under test.

Stray Admittance

 

The OPEN correction data is taken at all preset frequency points, independent of the test frequency you set.

Handler Interface        

This section provides information of the built-in handler interface including:

  • Pin Assignment
  • Circuit Diagram
  • Timing Chart

Built-in handler interface outputs signals that indicate the end of a measurement cycle, the result of bin sorting by the comparator. In addition, the instrument accepts input of external trigger. To view the signals easily integrate this instrument with a component handler or system controller. This means it can be fully automated the tasks component inspection, component sorting, and processing of quality management data for higher manufacturing efficiency.

Pin Assignment

Pin Signal Direction Overview
1 /BIN1 Output Result of sorting is based on Open-collector.

If EX-V2 signal was connected with EX-VCC, a built-in 5 kΩ pull-up resistance is used.

 

2 /BIN2 Output
3 /BIN3 Output
4 /BIN4 Output
5 /BIN5 Output
6 /BIN6 Output
7 /BIN7 Output
8 /BIN8 Output
9 /BIN9 Output
10 /OUT Output
11 /AUX Output
12 Trig-8V Input An external trigger signal for 8 V EX-VCC. The pin is connected when EX-VCC = 5 V~8 V.
13 Trig-24V Input An external trigger signal for 24 V EX-VCC. The pin is connected when EX-VCC=8 V ~24 V
14 EX-V2 Power External DC Voltage.
15 The power of built-in 5 kΩ pull-up resistance of the output signals.
19 /PHI Output “Primary parameter beyond upper limit” signal. Output of this signal is generated when the primary parameter exceeded the upper limit for bins 1 to 9.
20 /PLO Output “Primary parameter below lower limit” signal. Output of this signal is generated when the primary parameter is below the lower limit for bins 1 to 9.
21 /SREJ Output “Secondary parameter out of limits” signal. Output of this signal is generated when the secondary parameter is out the limits.
22 EX-VCC Power External DC Voltage. Supplies voltage for DC isolation input signal (/TRIG8V, /TRIG24V)
23 EX-V1 Power External DC Voltage. Supplies voltage for IDX and EOM signal pull-up resistance.
24 /IDX Output “End of analog measurement” signal. Output of this signal is generated when analog measurement is complete. This means that once the handler has received this signal, the next DUT can be connected to the UNKNOWN terminal. However, measurement data are not available until the /EOM signal is output.
25 /EOM Output “End of measurement cycle” signal. When the output of this signal is generated, the measurement data and sorting results are available
26 EX-COM2 Power Common signals for external DC current EX-V2
27 EX-COM Power Common signal for external DC current EX-VCC
28 EX-COM1 Power Common signals for external DC current EX-V1.

Power Rating:

Input/output device Logic Electrical requirements
OUTPUT Connector out with pull-up resistance Negative logic 35 V DC

50 mA DC max

INPUT Rising-edge 50 mA DC max
EXT.DCV DC voltage input 35 VDC max

Electrical Characteristics:

Input Signal:

  • Each input signal is connected to the LED (cathode side) of the photo-coupler.
  • The LED (anode side) is connected to the pull-up power supply voltage.

Output Signal:

  • Each output signal is generated via an open collector by using a photo-coupler.
  • The voltage of each output is obtained by connecting pull-up resistors, inside or outside of the device.

Power Supply

Power supply can be selected from external power supply +3.3 V to +3.5 V.

Schematic:

Handler schematic

Typical Circuit Diagram of Handler Interface Input Signals:

Typical Circuit Diagram of Handler Interface Output Signals:

Timing chart:

Timing:

Basic Measurement procedure:

The following flow chart shows the basic procedures used to measure the impedance of capacitors, inductors, resistors, and other components.

Remote Control:

About RS-232C

Connect the controller i.e.) PC and PLC to the RS-232 interface using RS-232 DB-9 cable. The serial port uses the transmitter, receiver and signal ground lines with RS-232 standard. It does not use the hardware handshaking lines CTS and RTS.

NOTE:

  • Use only DB-9 cable
  • Cable length should not exceed 2 m.

RS-232 connector in the real panel

RS-232 connector pinout:

NAME DB-25 DB-9 NOTE
DCD 8 1 No connection
RXD 3 2 Transmit data
TXD 2 3 Receive data
DTR 20 4 No connection
GND 7 5 Ground
DSR 6 6 No connection
RTS 4 7 No connection
CTS 5 8 No connection

About USB-Serial Interface (OPTION)

The USB-Serial Interface allows you to connect LCR meter to a USB port on your PC.

To Select Baud Rate:           

Before controlling the LCR meter by issuing RS-232 commands from built-in RS-232 controller connected via DB-9 connector, configure the RS-232 baud rate.

This instrument’s built-in RS-232 interface uses the SCPI language.

RS-232 configuration is as follows:

  • Data bits: 8-bit
  • Stop bits: 1-bit
  • Parity: none

To set up the baud rate

Step 1. Press the [Meas] or [Setup] key

Step 2. Press the [SYSTEM] bottom soft key.

Step 3. Use the cursor key to select [BAUD] field

Step 4. Use the soft keys to select baud rate.

Soft key Function
1200
9600
38400
57600
115200 Recommended, system default

USB-Serial interface

The USB-Serial Interface is used to connect the device via USB port to the PC. The device can be controlled using USB port.

Installing USB-Serial drivers on Windows XP:

  • Install the USB-Serial driver before using USB-Serial Interface.
  • Connect the USB-Serial Interface to the USB port on the PC.
  • Windows XP launch the window “Found New Hardware Wizard”
  • Select “No not this time” option and click “Next” to proceed for installation.
  • Select the option “Install from a list or specific location (Advanced)” and then click “Next”.
  • Select the option “Search for the best driver in this location” and browse the location by clicking browse button. Once the file path selected, click next to proceed.
  • Completing the Found New hardware Wizard.
  • Click “Finish” to complete the installation for the first port of the device.
  • The “Found New hardware Wizard will continue by installing the USB-Serial Converter driver for the second port of the device.
  • Open the Device Manager (located in “Control Panel\System” then Select the “Hardware” tab and click “Device Manager”) and select “View > Devices by connection”, the device appears as a USB Serial Converter” with an additional COM port with the label “USB Serial Port”.
  • Figure shows the USB Serial Port.

SCPI Language

Standard commands for programmable Instruments (SCPI) are fully supported by the RS-232 interface.

Command Structure:

LCR meter commands are divided into two types:

  • Common commands
  • SCPI commands

Common commands are common for all devices. SCPI commands are used to control the each LCR meter functions. The SCPI commands are represented using tree structure in three levels. The highest level commands are called the subsystem commands and the lower level commands are legal only when the subsystem commands have been selected.

Colon (:) A colon is used to separate the higher level commands and the lower level commands.

Semicolon (;) A semicolon is used to separate two commands in the same message and it does not change the current path.

Command Tree Example:

Dimensions

Questions from our customers

  1. A

    Yes, you can simultaneously specify the averaging factor within the range of 1 to 256 in steps of 1 Averaging Factor to improve performance.

  2. A

    This LCR Meter with Test Signal Monitor (Key Lock Function) comes with a frequency range of 50 Hz~100 kHz, 16 points and test signal levels of 0.01 Vrms to 2.00 V rms.

Only registered users are eligible to enter questions