Hioki ST4030, ST4030A Users guide

ST4030

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ST4030A

Instruction Manual

IMPULSE WINDING TESTER

Be sure to read this manual before using the instrument.

When using the instrument for the

rst time

Parts Names and Functions

Communication Command Instruction Manual

Dec. 2019 Revised edition 2 ST4030A961-02 19-12H

p.8 Maintenance and Service



CD Error Display and Solution



Troubleshooting



p.207



p.214



p.5

Measurement Flowchart

The basic measuring ow is as described below.

Preparation

See “2 Preparation for Measurements” (p. 13)

Master workpiece

(known-good winding)

Setting Test Conditions and Judgment Conditions

Select [SETTING] in test conditions settings mode. (p. 18)

Select the settings table that will acquire the master waveform. (p. 29)

Workpiece

under test

Set the output items such as applied voltage, applied number of pulses, sampling frequency,

etc. (p. 41)

Connect the master workpiece to the test lead.

ST4030A961-02

Calibrate the voltage and acquire the master waveform. (p. 49)

Set the judgment criteria. (p. 53)

Implementing tests

Select [TEST] in test mode. (p. 18)

Select the settings table that acquired the master waveform to be used in the test (p. 29)

Connect the workpiece under test to the test lead.

Start the test and check the test results. (p. 84)

Save the test results

Make the settings for saving the data. (p. 169)

Save the test results. (p. 176)

Contents

Introduction Notations Conrming Package Contents Options (Sold separately) Usage Notes

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1 Overview 7

1.1 Overview

1.2 Features

1.3 Parts Names and Functions

1.4 Screen Operations

Measuring mode settings Moving windows Touch keyboard inputs Screen conguration

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2 Preparation for

Measurements

2.1 Connecting the Test Lead (on the ST4030)

2.2 Connecting the Power Cord

2.3 Power Supply ON/OFF

Main power supply ON Main power supply OFF Sleep mode Startup mode

2.4 Select Measuring Mode

2.5 Inspecting before Measurement and Verifying Operations

Inspection Checking the voltage generated Checking the impulse response waveforms

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3 Switching Test

Conditions (Table

Functions)

3.1 Overview

Overview of test conditions switching functions Items that can be saved

Operations owchart in test conditions settings mode and test mode Screen conguration

3.2 Current Table Selection

3.3 Table Initialization

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.......................29

3.4 Table Deletion

3.5 Changing the Table Name

3.6 Table Copying

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4 Setting the Test

Conditions

4.1 Overview

Operations owchart in test conditions settings mode Screen conguration

4.2 Applied Voltage

4.3 Number of Applied Pulses

4.4 Sampling Frequency/Number of Sampling Data

Automatic settings for range of waveform acquisition

4.5 Trigger Delay

4.6 Voltage Calibration

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5 Setting Judgment

Conditions

5.1 Overview

Judgment types Settings operations procedure

5.2 LC and RC Values Area Judgments [LCRC AREA]

Enabling the LC and RC values judgments function Importing LC and RC master values Auto creation of the PASS judgment area Manually creating the PASS judgment area

5.3 Waveform Judgments

Surface area comparison judgments

[AREA]

Differential surface area comparison judgments [DIFF AREA] Flutter detection judgments [FLUTTER]

Secondary differential detection judgments [LAPLACIAN]

Waveform judgment area and judgment threshold value automatic settings

functions

5.4 Discharge Judgments (When Incorporating Model ST9000)

Discharge judgment methods

[DISCHARGE]

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.. 58

..... 66

Contents

Threshold value of the test waveform discharge amount over the master

waveform discharge amount Deviation threshold value of the test

waveform discharge amount Setting the discharge amount judgment

area

..........................................................76

......................74

......................75

6 Implementing Tests 77

6.1 Overview

Operations owchart in test mode Screen conguration

6.2 Checking Test Start and Test Results

................................................77

..............77

..................................78

7 Break down voltage

test (BDV)

7.1 Overview

Operations owchart in break down voltage test mode Screen conguration

7.2 Checking Test Start and Test Results

7.3 Setting the Test Conditions

Applied voltage settings Number of applied pulses settings

Setting the sampling frequency and number of sampling data

Setting the waveform acquisition area automatically

7.4 Setting Dielectric Break down Judgment Conditions

LC and RC values judgments Discharge judgment

Waveform surface area comparison judgment Peak voltage value uctuations Vibration frequency uctuations

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8 Other Functions 101

8.1 Interlock Function

Unlocking the interlocks

8.2 Key Lock Function

Unlocking the key locks

8.3 Double Action Function

8.4 Memory Function

Memory function settings (ON/OFF) Saving memory data Deleting memory data

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8.5 Displays

8.6 Graph Display Settings

Overlay settings Waveform color settings LC and RC graph scale settings

Implementing the LC and RC graph auto scale

8.7 Judgment Beep

8.8 Key Beep

8.9 Test Time (EOM) Display

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8.10 Communications Commands Long Format Settings

..................................120

8.11 Initializing the Instrument (System Reset)

8.12 Terminal Open Error Setting

8.13 Voltage Error Setting

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.............122

..........................123

9 System Settings 125

9.1 Instrument System Information

9.2 Self-test Function

Touch panel test Touch panel correction Screen display test ROM/RAM test EXT. I/O test

............................................131

9.3 Date and Time Settings

................................126

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.....................132

........125

10 External Control

(EXT. I/O)

10.1 External Control Measurement

......................................................134

Flow

10.2 Sinking Current (NPN) / Sourcing Current (PNP)

10.3 Connection (Instrument and Control Devices)

Instrument connector and compatible connectors Signal functions Internal circuit conguration Electrical specications Connection examples

10.4 Timing Chart

Explanation of timing chart times Measurement timing example

Flow of starting measurements from an external device, and reading the

judgment results

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133

Contents

Index

11 Communications

Interface

11.1 Overview

Screen display

11.2 Specications

RS-232C GP-IB USB LAN Total

11.3 Mounting and Removing an Interface

11.4 Interface Settings

11.5 Connecting and Setting RS-232C (Model Z3001)

11.6 Connecting and Setting GP-IB (Model Z3000)

11.7 Connecting and Setting USB

11.8 Setting and Connecting LAN

Connection method Setting procedure

11.9 Remote Mode

11.10 Communications Monitor

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145

12 USB Host 165

12.1 Overview

12.2 Removing the USB Memory

12.3 File Window

12.4 Settings for Saving the Data

Setting auto save Setting manual save Text save items settings Setting the text save format Setting the image save format

Setting the name of the saved le and its folder

12.5 Saving Test Results

Saving manually Checking the test results that have been

saved

12.6 Saving and Importing Test Conditions

Saving test conditions Importing test conditions

12.7 Editing Files and Folders

Formatting USB memory

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Deleting les and folders Creating folders Changing the folder name and le name Information display

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. . 188

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13 Specications 191

13.1 General Specications

13.2 Input Specications/Output Specications/Measurement Specications

Basic specications Accuracy specications

13.3 Functional Specications

Test conditions settings Set judgment conditions Test conditions switching functions Break down voltage test (BDV) mode Safety protection function Other functions

13.4 Interface Specications

External control terminal (EXT.I/O) specications Communications interface specications USB host specications Test time (Reference value)

13.5 L2250 Clip Type Lead (Option)

General Specications Basic specications

13.6 L2252 Unprocessed Lead Cable (Option)

General Specications Basic specications

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. . 202

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14 Maintenance and

Service

14.1 Troubleshooting

Before sending the instrument for repair FAQ regarding external control (EXT. I/O)

14.2 Initializing the Instrument (Full Reset)

14.3 Error Display

14.4 Discarding the Instrument (Removing the Lithium Battery)

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207

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212

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iii

Contents

15 Appendix 221

15.1 Block Diagram

15.2 Circuit Conguration

Circuit operations during tests Effects of cable parasitic components

15.3 Rack Mount

Metal tting dimensions Installation method

15.4 Dimensions Diagram

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......223

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15.5 Repeat Accuracy (Reference Value)

Reproducibility of the voltage generated Oscillation waveform reproducibility

..230

.........231

15.6 Max. Applicable Voltage (Reference Value) According to the Workpiece Inductance

.................232

15.7 Voltage Switching Time (Reference Value)

...................................................233

15.8 Waveform Differences (Typical Values) Between Instruments

...........234

15.9 Affects on Measurements According to the Length of the Test Lead

.............................................236

15.10 Precautions when Processing Test

....................................................237

Leads

15.11 Ver. 1.01 Compatibility Function

.......239

230

Index 241

Warranty Certicate

Introduction

Thank you for choosing the Hioki ST4030, ST4030A Impulse Winding Tester. Preserve this manual carefully and keep it handy to make full use of this instrument for a long time. Read the separate document “Operating Precautions” carefully before using the instrument.

Target audience

This manual has been written for use by individuals who use the product in question or who teach others to do so. It is assumed that the reader possesses basic electrical knowledge (equivalent to that of someone who graduated from the electrical program at a technical high school).

Trademarks

• Windows is either registered trademarks or trademarks of Microsoft Corporation in the United States and other countries.

• Any other products and company names are generally either trade names, registered trademarks or trademarks of respective companies.

Introduction

Notations

Safety symbols

In this document, the risk seriousness and the hazard levels are classied as follows.

WARNING

CAUTION

IMPORTANT

Indicates a potentially hazardous situation that may result in death or serious injury to the operator.

Indicates a potentially hazardous situation that may result in minor injury to the operator or damage to the instrument or malfunction.

Indicates information related to the operation of the instrument or maintenance tasks with which the operators must be fully familiar.

Indicates prohibited actions.

Indicates an action that must be performed.

Symbols afxed to the instrument

Indicates cautions and hazards. Refer to the “Usage Notes” (p. 5) and warning messages presented at the beginning of each instruction for use of the Instruction Manual, and included “Operating Precautions”.

Indicates that dangerous voltage may be present at this terminal.

Other Descriptions

(p. ) Indicates the location of reference information.

START

(Boldface)

[ ]

S/s

Indicates the names and keys on the windows in boldface.

Names of menus, dialog boxes, buttons in a dialog box, and other UI elements on the screen are enclosed in brackets [ ].

The instrument describes the number per second of digitized analog input signals in units of samples per second (S/s). Example: “20 MS/s” (20 megasamples per second) means digitization of 20 × 10

times per second.

Accuracy descriptions

We dene measurement tolerances in terms of setting values with the following meanings.

Setting Indicates the value set as the output voltage, current, or other quantity.

Conrming Package Contents

When you receive the instrument, inspect it carefully to ensure that no damage occurred during shipping. In particular, check the accessories, panel switches, and connectors. If damage is evident, or if it fails to operate according to the specications, contact your authorized Hioki distributor or reseller.

Store the packaging materials even after unpacking, because you will need them when you transport the instrument.

Conrm that these contents are provided.

Model ST4030 or ST4030A Impulse Winding Tester



Power cord



Instruction Manual (this document)



Operating Precautions (0990A903)



Application disc (CD)



• Communication Command Instruction Manual Communication Command Reference Default settings table

• USB driver

The latest version can be downloaded from our website.

Options (Sold separately)

The following options are available for the instrument. To purchase an option, please contact your authorized Hioki distributor or reseller. Options are subject to change. Please check Hioki’s website for the latest information.

Model ST9000 Discharge Detection Upgrade



(Optional when shipped from factory)

Model L2250 Clip Type Lead



(Maximum rated voltage: 3300 V AC peak)

Model L2252 Unprocessed Lead Cable



(Maximum rated voltage: 4200 V AC peak)

Model Z3000 GP-IB Interface



Model 9151-02 GP-IB Connector Cable (2 m)



Model Z3001 RS-232C Interface



Model 9637 RS-232C Cable (9pin-9pin/1.8 m)



Usage Notes

Read the separate document “Operating Precautions” carefully before using the instrument. Follow these precautions to ensure safe operation and to obtain the full benets of the various functions.

Installation

CAUTION

• Ventilation holes for heat radiation are provided on the rear of the instrument. Leave sufcient space around the ventilation holes and install the instrument with the holes unobstructed. Installation of the instrument with the ventilation holes obstructed may cause a malfunction of the instrument or a re.

• Do not place the instrument on an unstable surface or inclined place.Dropping or knocking down the instrument could cause bodily injury or damage to the instrument.

Usage Notes

Open 5 cm or longer

This instrument may cause interference if used in residential areas. Such use must be avoided unless the user takes special measures to reduce electromagnetic emissions to prevent interference to the reception of radio and television broadcasts.

Application disc

• Exercise care to keep the recorded side of discs free of dirt and scratches. When writing text on a disc’s label, use a pen or marker with a soft tip.

• Keep discs inside a protective case and do not expose them to direct sunlight, high temperature, or high humidity.

• Hioki is not liable for any issues your computer system experiences in the course of using this disc.

Test lead

CAUTION

• Do not make small bends or repeatedly bend the cable. As a benchmark, bending to 6x or less the cable diameter will damage the cable core and cover, causing deterioration.

• Do not hold the cable when removing the clip from the workpiece.

• Hold the clip in your hand, and open and close gently.

Repeatedly opening and closing so that the clip springs risks damaging and causing deterioration to the opening and closing mechanism.

Usage Notes

Overview

1.1 Overview

Windings (workpieces) found in motors, coils, and other components are covered with insulation, but the insulation resistance may fall and short circuits occur between proximate layers for some reason. The condition is called a “layer short circuit”. The ST4030, ST4030A Impedance Winding Tester not only compares and judges waveform conformance through comparisons with existing response waveforms, but also detects layer short circuits using judgment methods that employ the rendering of response waveforms as numerical values (LC and RC values). Further, incorporating the ST9000 Discharge Detection Upgrade (optional) into the instrument enables highly precise detection of partial discharges that occur in the stages in advance of a layer short circuit.

1.2 Features

High-speed and high-resolution sampling

Sampling using 200 MHz, 12 bit resolution enables the detection of minute changes in the response waveform that hitherto could not be seen. In this way, it is possible to detect layer short circuits with a high level of accuracy compared to before.

Numerical rendering of impulse response waveforms (LC and RC values)

Overview

The equivalence circuits for the impulse test are viewed as LCR linear equivalent circuits, and the response waveforms are rendered numerically into LC and RC values. Rendering the response waveforms into numerical values enables the response waveforms to be judged quantitatively. Further, the data can be managed more easily than the waveform data.

Impulse can be tested with the rotor mounted

With the rotor and motor stator mounted, the stray capacitance between the rotor and the stator changes depending on the rotor angle. Changes in the stray capacitance also change the impulse response waveform, so judgments are difcult using existing waveform comparison methods. Numerical judgment values using LC and RC values can create PASS judgment area from the LC and RC values distribution, and so by creating PASS judgment area using a healthy phase, it is possible to test the impulse with the rotor mounted.

High-precision Discharge Detection Upgrade

Extracting the high-frequency discharge components of the response waveform enables highly precise detection of partial discharges, which have hitherto been difcult to detect using utter operations and Laplacian operations.

High waveform reproducibility

The applied voltage variation is small, so it is possible to detect defective products accurately. Further, the instrument differences when the same workpiece is tested are small, so it is possible to use the master workpiece data as is even if the instrument is replaced. Reference: “15.5 Repeat Accuracy (Reference Value)” (p. 230)

Easy-to-use interfaces and an abundance of interfaces

The screen uses 8.4-inch color TFT crystals with touch panel for easy viewing and intuitive operability. Compatible with various usage scenarios using external control (EXT. I/O), USB memory, USB devices, and LAN. Further, RS-232C or GP-IB can be added as options.

Parts Names and Functions

1.3 Parts Names and Functions

2 3 4 5 6 7

Front

18 17 16

8 11

9310

Rear

14 13 12

19 19

Bottom

212020

Top

Parts Names and Functions

No. Name Function

Display 8.4-inch color TFT liquid crystal display.

START button Starts measurements. p. 77

OUTPUT lamp Shows the voltage

USB connector Connects a USB memory. p. 165

STOP button Stops the voltage application and suspends testing.

PASS/FAIL lamp Shows the total judgment

Startup button Switches the instrument

Voltage output terminal Connects a test lead (optional). p. 14

Serial number The serial number consists of 9 digits. The rst two (from the left)

Comes with a resistant lm touch panel.

Red: Voltage is being applied p. 84

application status.

Also used during double actions.

result.

ON and OFF.

indicate the year of manufacture, and the next two indicate the month of manufacture. Required for production control. Do not peel off the label.

OFF: Standby

Green: Total judgment result PASS p. 84

Red: Total judgment result FAIL

OFF: No judgments

OFF: Main power supply OFF p. 16

Red: Sleep mode

Green: ON mode

Reference

p. 10

p. 84,

106

125

Overview

MAC address MAC address of the instrument. p. 125

Vent holes For ventilation, and to prevent the interior of the instrument from

EXT.I/O

NPN/PNP switch

mount

LAN connector *

USB connector *

External control

terminal (EXT.I/O)

Communications

interface*

Power inlet Connects the provided power cord. p. 15

Main power supply

switch

Stand Tilts the instrument to enable the screen to be viewed easily.

Support legs

overheating. Install so that the vent holes are not blocked.

Switches the programmable type of the external control terminal. Left: NPN (current sink)

Connects a LAN cable. p. 157

Connects a USB cable. p. 155

Enters signals from the programmable controller and I/O boards to control the instrument.

Mount a Z3000 GP-IB Interface (optional) or Z3001 RS-232C Interface (optional).

Turns ON and OFF the main power supply to the instrument. p. 16

Make sure to fully open both the left and right stands before installation.

When mounting the instrument to a rack* legs.

Right: PNP (current source)

, remove the support

–

133

p. 133

152,

154

–

Handle Used to carry the instrument. –

*1: For how to use RS-232C, GP-IB, USB, and LAN, see the “Communications Commands Instruction

Manual” on the application disk.

*2: The instrument can be mounted to a rack. See “15.3 Rack Mount” (p. 224).

Screen Operations

1.4 Screen Operations

The instrument uses a touch panel for all settings and changes to the measuring conditions. Gently touch the onscreen keys to select the items and values set for those keys.

CAUTION

Do not press the touch panel forcefully or jab it with the point of a hard object. Doing so may cause a malfunction.

This document describes below the procedures up to displaying the various settings screens. Example: When displaying the [SETTING] screen

Measurement screen

(

) [MODE] > [SETTING]

Measuring mode settings

Example: Selecting the test conditions settings mode

Tap [MODE] to display the measuring mode selection window.

Select the measuring mode.

Here, tap [SETTING].

Tap [EXIT] to return to the measurement screen.

Moving windows

Press and hold the window title bar while dragging the window to move the window to a new position.

Window title bar

Screen Operations

Overview

Touch keyboard inputs

Enter text and then tap [SET] to conrm. To cancel, tap [CANCEL].

1 3 4

5 6 7





BS Deletes 1 character.

CLR Deletes all.

Moves the cursor to the left.

Moves the cursor to the right.

KEY TYPE Switches the keyboard type.

A   a Switches between upper and

lower case.

!   A Switches between symbols/

numbers, and the alphabet.

Screen Operations

Screen conguration

The instrument settings windows are congured using the following stages.

Measurement screen

MODE VOLT

SETTING

TEST

BDV

NONE

OUTPUT

PULSE

SAMPLING

DELAY

JUDGE

OUTPUT START

LCRC AREA

DISCHARGE

AREA

DIFF AREA

FLUTTER

LAPLACIAN

END

TABLE

SYSTEM

FILE

SYSTEM

I/F

INFO

TEST

CLOCK

JUDGE

STEP

PULSE

SAMPLING

LCRC AREA

DISCHARGE

AREA

Preparation for Measurements

Make sure to read through both “Usage Notes” (p. 5) in this manual and the separate “Operating Precautions” before starting the preparations that precede measuring. For rack mounts, see “15.3 Rack Mount” (p. 224).

Installing the device.

Connecting the test lead.

p. 5

p. 14

Connecting and setting the external interface (as necessary).

EXT. I/O p. 136

RS-232C p.

GP-IB p.

USB p.

152

154

155

Preparation for Measurements

LAN p.

USB memory p.

Connecting the power cord.

Turning on the instrument power supply.

Setting the date and time (as necessary).

Setting the measuring mode.

Inspecting before measurement and verifying operations.

157

169

p. 15

p. 16

p. 132

p. 18

p. 19

Connecting the Test Lead (on the ST4030)

2.1 Connecting the Test Lead (on the ST4030)

Connect the test lead to the voltage output terminal on the instrument.

CAUTION

• To prevent damage to the coaxial connectors or joint, make sure to unlock rst, and grasp the coaxial connector and pull it out.

• Model L2250 Clip Type Lead’s maximum rated voltage is 3300 V AC peak. To test

higher voltages, use the L2252 Unprocessed Lead Cable.

• Model L2252 requires customer modication. To prevent electric shock and equipment damage when modifying the lead, see “15.10 Precautions when Processing Test Leads” (p. 237).

Red Black

Rear

Align the groove on the test lead’s coaxial cable to the lock pin on the voltage output

terminal on the ST4030 side and insert.

Rotate the coaxial connector on the test lead to the right to lock it.

When removing, rotate the coaxial connector on the connection cable to the left and then pull out.

Connecting the Power Cord

2.2 Connecting the Power Cord

To supply power to the instrument, connect the power cord to the power supply inlet on the rear of the instrument.

WARNING

Before turning on the power supply, check that the power supply voltage described on the power supply connector on the instrument and the power supply voltage to be used match each other. Using outside the range of the designated power supply voltage may cause damage and electrical malfunction to the instrument.

Preparation for Measurements

OFF

Rear

Turn OFF the main power supply switch on the rear of the instrument.

Connect the power cord to the power inlet.

Connect the plug of the power cord to the grounded outlet.

IMPORTANT

If the power supply is cut off while the main power supply is ON (by a breaker tripping, etc.), the instrument will start automatically when the power is supplied again.

To grounded outlet

Power Supply ON/OFF

IMPORTANT

• If the main power supply switch is turned OFF or there is a power failure during startup, the instrument

settings may be lost.

• If the instrument’s settings have not been saved, “WARNING 101” will be displayed on start-up. If you

encounter the warning, perform either of the following steps:

• Reset the instrument’s settings and then recongure them.

• Reset the instrument’s settings and then load a previously saved settings le from a USB drive.

2.3 Power Supply ON/OFF

Turn ON the main power supply on the rear of the instrument beforehand to enable turning ON and OFF the power supply using the startup button on the front. This is convenient if incorporating the instrument into an automated machine or assembly line. If the main power supply is turned OFF while the instrument is in sleep mode and then turned ON again, the instrument will start in sleep mode.

• Using the startup button in sleep mode will hold the instrument settings even if the main power supply switch is turned OFF (backup).

• If the instrument was not used for a long time, it is necessary to charge the internal backup battery. Turning ON the instrument’s main power supply will charge the internal battery. Charge for a minimum of 3 hours, although 24 hours is recommended.

Main power supply

switch

Main power supply ON

Turn ON the main power supply switch.

The startup button lamp will turn on.

Startup mode

Lit green

Main power supply OFF

Startup button

Rear Front

Sleep mode

Lit red

Turn OFF the main power supply switch.

The startup button lamp will turn off.

Power Supply ON/OFF

IMPORTANT

After writing to the settings internal memory is nished, the device will enter sleep mode. While writing is underway, the date and time display will have a red background.

IMPORTANT

To measure using the accuracy in the specications, leave the instrument to warm up for 60 minutes or longer after turning ON the main power supply and canceling sleep mode.

Sleep mode

This is the mode in which the device power supply is OFF. Only the circuit that turns on the startup button lamp is operating.

With the main power supply switch turned ON, press and hold the startup button for approx.

2 sec.

The startup button lamp will turn red and the instrument will enter sleep mode.

Startup mode Sleep mode

Lit green Lit red

Approx. 2 sec.

Startup mode

Press the startup button when the instrument is in sleep mode.

The startup button lamp will turn green and the instrument will enter startup mode.

Sleep mode

Startup mode

Preparation for Measurements

Lit red

Lit green

Select Measuring Mode

2.4 Select Measuring Mode

Tap [MODE] in the measurement screen to display the measuring mode selection window. Choose from 4 types of measuring mode.

1 2 3

[SETTING] Test conditions settings mode

[TEST] Test mode

[BDV] Break down voltage test (BDV) mode

[NONE] Voltage application disabled mode

Sets the test conditions, sets the judgment conditions, and acquire the master waveforms.

Calls the test conditions that have been set using test conditions settings mode, and to test objects.

Tests the impedance while gradually increasing the voltage applied to the workpiece to determine the break down voltage.

It is not possible to output from the instrument for safety reasons.

Inspecting before Measurement and Verifying Operations

2.5 Inspecting before Measurement and Verifying Operations

Inspection

Before using the instrument for the rst time, verify that it operates normally to ensure that no damage occurred during storage or shipping. If you nd any damage, contact your authorized Hioki distributor or reseller.

Is the sheath of the cable

normal without any damage or exposed metal part?

Not exposed

Is the instrument normal

without any damage?

Exposed

Damaged

This may cause electric shock or short circuit, so replace with an undamaged cable. Contact your authorized Hioki distributor or reseller.

Send for repairs.

Preparation for Measurements

Not damaged

When the main power supply

is ON, is the startup button lamp either green or red?

Lamp is ON

When the startup button is ON,

is the opening screen (model

name and version) displayed?

Displayed

After the opening screen is

displayed, is the interface board error screen displayed?

Lamp is

OFF

Not

displayed

Displayed

Send for repairs. There is a risk of a broken wire in the power cord, or of a malfunction in the instrument.

Send for repairs. There is a risk of a malfunction in the device.

Turn OFF the power supply, remove the interface board, and turn ON the power supply again. Z3002 LAN Interface boards cannot be used with this instrument.

Not displayed

Inspection is complete.

Inspecting before Measurement and Verifying Operations

Checking the voltage generated

Check that operations are at an environmental temperature of 23C±5C, and that the humidity is 80% RH or less.

Select an empty table to which nothing has been saved in the test conditions settings mode.

Set the applied voltage to 100 V, the sampling frequency to 200 MHz, the number of sampling

data to 1001, and the number of pulses to be applied to 1.

Implement the tests with nothing connected to the voltage output terminal.

(Illustration below is ST4030A)

(Nothing is connected)

Rear

Check that the peak voltage (value displayed on the instrument) is 100 V ±2%.

Change the voltage setting.

ST4030: 3300 V ST4030A: 4200 V

Implement the test with nothing connected to the voltage output terminal.

Check that the peak voltage (value displayed on the instrument) is below.

ST4030: 3300 V±2% ST4030A: 4200 V±2%

IMPORTANT

Contact your authorized Hioki distributor or reseller if the peak voltage differs from the set voltage by 2% or greater.

Inspecting before Measurement and Verifying Operations

Checking the impulse response waveforms

Implement impulse testing on the inspection master workpiece to check that there are no abnormalities in the instrument or equipment. Set the test conditions according to the workpiece.

Tools to be prepared

Master workpiece (a workpiece close to the mass production master workpiece, or a coil of approx. 1 mH created using reinforced insulation wire) Calibrate the voltage of the master workpiece beforehand and record the master waveform.

Connect the master workpiece to the test lead.

Select the table to which the master waveform was saved in test mode.

Implement the test.

If the waveform shape (peak voltage, zero‑cross point, etc.) changes greatly

(1) Being affected by residual magnetization from the workpiece core.

Preparation for Measurements

Apply a degaussing impulse to the workpiece until the waveform stops changing.

You can see how waveforms diverge by turning on waveform superposition and repeating the test multiple times. Reference: “Overlay settings” (p.

112)

Inspecting before Measurement and Verifying Operations

(2) Waveform reproducibility is poor.

Periods of magnetic saturation reduces the workpiece inductance, so the vibration frequency of the response waveform increases (i.e., inclination is more sudden). The waveform may experience major variation when multiple impulse tests are performed on the same workpiece because of the magnetic characteristics of the core.

If the core is magnetically saturated, the waveform will tilt rapidly.

(3) Being affected by the magnetic anisotropy of the workpiece core.

The characteristics of the magnetic materials may depend on its orientation. Implement the tests using the same layout as during the voltage calibration.

(4) The master workpiece has been changed.

Recalibrate the voltages. Even if the coil and motor have the same model number, if they have different magnetic core characteristics (varied by lot), there is a risk that the waveform will change due to differences in the stray capacitance of the workpiece.

(5) The equipment cable or device connected in parallel to the instrument has changed.

The cable capacitance and the parasitic capacitance of the equipment connected in parallel affects the vibration frequency. Recalibrate the voltages.

Example:

Waveform difference due to cable length when implementing impulse tests on coils with the same inductance values (1 mH).

If 1.5 m

If 3.0 m

Inspecting before Measurement and Verifying Operations

If ringing occurs that did not occur during voltage calibration

(1) Master workpiece is grounded.

When the master workpiece is grounded, ringing may occur due to parasitic components of the power cord or test lead. Do not ground the master workpiece.

(2)

e test lead has been extended.

The longer the test lead the more the parasitic capacitance and parasitic inductance increase, making it easy for ringing to occur. If the user is processing the test lead themselves, make the lead as short as possible. If replacing the test lead, recalibrate the voltages.

Ringing

Preparation for Measurements

(3) Master workpiece insulation is worn.

Prepare a new master workpiece, and implement voltage calibration.

(4) Test lead insulation is worn.

Prepare a new test lead, and implement voltage calibration.

IMPORTANT

If none of these apply, there is a risk that the instrument is damaged. Contact your authorized Hioki distributor or reseller.

+ 220 hidden pages

Hioki ST4030, ST4030A Users guide

Specifications and Main Features

Frequently Asked Questions

User Manual