HIOKI RM3543, RM3543-01 User manual

Instruction Manual

RM3543

RM3543-01

RESISTANCE HiTESTER

September 2013 Revised edition 2 RM3543A981-02 13-09H

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Contents

Contents

i

1

Task-Oriented Reference...............................1

Measurement Flow.........................................2

Introduction.....................................................3

Verifying Package Contents...........................3

Safety Information..........................................5

Operating Precautions....................................7

 Decide According to Upper/Lower Thresholds

(ABS Mode) ............................................. 37

3.8 Confirming Faulty Measurements ......38

Chapter 4 Customizing

2
3

Measurement
Settings 41

Chapter 1 Overview 11

1.1 Product Overview and Features ........11

 Block Diagram ..........................................14

1.2 Names and Functions of Parts ...........15

1.3 Screen Organization ..........................17

Chapter 2 Measurement

Preparations 21

2.1 Connecting the Power Cord............... 22

2.2 Connecting Measurement Cables and

Test Fixtures ......................................23

 Making Your Own Measurement Cables ..24

2.3 Turning the Power On and Off ...........26

Chapter 3 Measurement

Settings (Basic
Measurements) 27

3.1 Pre-Operation Inspection ...................27

3.2 Switching 100 m range Measurement

Currents .............................................28

3.3 Setting the Measurement Speed .......29

3.4 Setting Measurement Start Conditions

(Trigger Source) .................................30

3.5 Selecting the Measurement Range ....31

3.6 Zero Adjustment .................................32

3.7 Judging Measured Values

(Comparator Function) .......................34

 Enabling and Disabling the Comparator

Function .................................... ................35

 Decide According to Reference Value and

Tolerance (REF% Mode) ..........................35

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4.1 Making Range-Specific Measurement

Settings ..............................................41

4.2 Setting Pre-Measurement Delay ........42

4.3 Correcting Measured Values

(Scaling Function) ..............................44

4.4 Setting the Measurement Integration

Time Option ........................................46

4.5 Stabilizing Measured Values

(Averaging Function) ..........................48

4.6 Checking for Poor or Improper Contact

(Contact Check Function) ...................49

4.7 Improving Probe Contact

(Contact Improver Function) ...............50

4.8 Detecting Measurement Voltage Faults

(Voltage Level Monitor Function) .......52

4.9 Applying Current Only When Measuring

(Current Mode Setting) .......................53

4.10 Test for Short-Circuited Probe
(Probe Short-Circuit Detection Function)

............................................................54

4.11 Comparing the Measurement Settings of
Two Instruments

(Settings Monitor Function)................ 56

4.12 Retrying Measurement After a Fault

(Retry Function) ..................................59

4.13 Maintaining Measurement Precision

(Self-Calibration) ................................60

4.14 Compensating for Thermal EMF Offset
(Offset Voltage Compensation - OVC) 61

Chapter 5 System Settings 63

5.1 Disabling and Enabling Key Operations

...........................................................63

 Disabling Key Operations

(Key-Lock Function) ................................. 63

4
5

ii

Contents

 Re-Enabling Key Operations

(Key-Lock Cancel) ................................... 64

5.2 Setting the Comparator Decision and

Key Beepers .......................................65

 Enabling or Disabling the Key Beeper ..... 65

 Setting the Comparator Decision (“JUDGE”)

Beeper ..................................................... 66

5.3 Power Line Frequency Manual Setting

...........................................................67

5.4 Setting the Clock ................................68

5.5 Adjusting Screen Contrast ..................69

5.6 Adjusting the Backlight .......................70

5.7 Initializing (Reset) ...............................71

 Signal Descriptions .................................. 91

8.2 Timing Chart ......................................92

8.3 Internal Circuitry .................................94

 Electrical Specifications ........................... 95

 Connection Examples ............... ... ...... ... ... 96

8.4 External I/O Settings .......................... 97

 Setting End-of-Measurement Signal Output

Signal Setting) ............................... 97

(EOM

 Setting the Trigger (TRIG) Signal Logic ... 98

8.5 External Control Q&A ........................99

8.6 Supplied Connector Assembly .........100

 Default Settings ........................................ 72

Chapter 9 Communications

(RS-232C/ GP-IB

Chapter 6 Storing and

Exporting Data 73

6.1 Storing Data at Specific Times

(Data Memory Function) .....................74

6.2 Store as soon as Measurement is Stable

(Auto-Memory Function) ....................75

6.3 Performing Statistical Calculations on

Measured Values ...............................78

 Using Statistical Calculations ................... 79

 Confirming, Printing, and Erasing Calculation

Results ..................................................... 80

6.4 Auto-Exporting Measured Values (at End
of Measurement) (Data Output Function)

............................................................81

Chapter 7 Printing 83

7.1 Connecting the Printer ........................83

 Connecting the Printer to the Instrument . 84

7.2 Instrument Settings ............................85

7.3 Printing ...............................................86

 Printing Measured Values and Comparator

Decisions ................................................. 86

 Printing Statistical Calculation Results ..... 86

Chapter 8 External Control 89

8.1 External Input/Output Connector

and Signals......................................... 89

 Connector Type and Signal Pinouts ........ 90

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9.1 Overview and Features ....................101

9.2 Specifications ...................................102

9.3 Connecting .......................................103

 Using the RS-232C Interface .................103

 Using the GP-IB Interface

(RM3543-01 only) .................................. 104

9.4 Configuring the Communications

Protocol ............................................105

 Configuring RS-232C Interface

Communications .................................... 105

 Configuring GP-IB Interface Communications

(RM3543-01 only) .................................. 106

 Select the Measurement Data Transmission

Format (both RS-232C and GP-IB) ........ 107

9.5 Communication Methods ................. 108

 To cancel the Remote state

(enter the local state) ............................. 108

 Message Format .................................... 109

 Output Queue and Input Buffer .... ... ... ... . 112

 Status Byte Register .............................. 113

 Event Registers ......................................115

 Initialization Items ................................... 118

 Command Execution Time ..................... 119

 Errors During Communications .... ... ... ... . 119

9.6 Message List ....................................120

 Standard Commands ............................. 120

 Device-Specific Commands ................... 121

9.7 Message Reference .........................126

 Message Reference Interpretation ......... 126

 Standard Commands ............................. 127

 Device-Specific Commands ................... 131

9.8 Data Exporting Methods .................. 152

Interface) 101

9.9 Sample Programs ............................154

 Using Visual Basic 5.0 or 6.0 ..................154

 Creation Procedure (Visual Basic 2005) .164
 Sample Programs (Visual Basic 2005) ...166

9.10 Device Compliance Statement......... 168

Chapter 10Specifications 171

Chapter 11Maintenance and

Service 183

11.1 Troubleshooting ...............................183

 Inspection and Repair .............................183

11.2 Cleaning ........................................... 184

11.3 Error Displays and Remedies ..........185

11.4 Disposing of the Instrument .............187

 Removing the Lithium Battery .................187

iii

Contents

6

Appendix A 1

Appendix 1Four-Terminal (Voltage-Drop)

Method......................................A 1

Appendix 2Effect of Thermal emf ...............A 2

Appendix 3Unstable Measurement Values.A 3

Appendix 4Effects of Probing .....................A 9

Appendix 5Rack Mounting........................A 11

Appendix 6Dimensional Diagram .............A 13

Appendix 7Calibration...............................A 14

Appendix 8Adjustment Procedure............A 16

Appendix 9Table of Commands Compatible

with the ADEX AX-1152D.......A 17

Appendix 10Zero Adjustment....................A 19

Index Index 1

7
8
9
10
11
12

Appendix

Index

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Task-Oriented Reference

Setting the measurement speed (p. 29)

Setting the averaging function (p. 48)

1

Task-Oriented Reference

To minimize measurement error

To judge measurement results

To correct faulty measurements

Setting the measurement speed integration time option (p. 46)

Correcting measured values (p. 44)

Zero-adjustment (p. 32)

Judge measured values (comparator function) (p. 34)
Compare the measurement settings of two instruments

(Settings Monitor function) (p. 56)

Confirm faulty measurement (p. 38)

Improve probe contact (Contact Improver function) (p. 50)
Test for short-circuited probe (probe short-circuit detection

function) (p. 54)
Compare the measurement settings of two instruments

(Settings Monitor function) (p. 56)

To automatically store measured
values

To print measurement results Printing (p. 83)

To measure by PLC connection

(PLC: Programmable Logic Controller)

To connect to a computer Communications (RS-232C/GP-IB interface) (p. 101)

To automatically send measure­ment data to a computer

(RS-232C interface only)

To check operation

Store as soon as measurement is stable
(Auto Memory function) (p. 75)

External control (p. 89)

Communications (RS-232C/GP-IB interface) (p. 101)

Export measurement values automatically
(when finished measuring) (p. 81)

Setting Measurement Start Conditions (Trigger Source) (p. 30)
Internal trigger (INT)

Calibration (p. A14)

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2

Computer
communications
(p. 101)

Printing (p. 83)

External control
(p. 89)

EXT I/O

RS-232C

GP-IB

Compare the settings of two instruments
(p. 56)

SET MONITOR

Connecting the Power Cord (p. 22)

Turn the power on (p. 26)

Connect (p. 21)

Install (p. 7)

Connect the measurement cables (p. 23)

Set measurement

conditions (as needed)

Confirm the screen confi guration
(p. 17)

Confirm the initial setup (p. 72)

• Basic Settings (p. 27)

• Configure settings for your

specific conditions (p. 41)

• System-related settings

(p. 63)

When changing settings

Change basic settings such
as measurement speed

Change to detailed settings
(measurement conditions
and system-related)

Set decision criteria

(p. 34)

Data transmission (p. 81) Printing (p. 83)

Computer communications

(p. 101)

External control (p. 89)

Statistical calculations

(p. 78)

Instrument interface settings must be
configured before printing or using
communications or remote control.

Turn the power off (p. 26)

Measurement Flow

Measurement Flow

Be sure to read the "Operating Precautions " (p. 7) b efore us e.

Installing, Connecting and Turning On

Settings

Calculation, Printing, Communication, and External Control Settings

When Finished

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Introduction

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 specifications, contact your dealer or Hioki representative.

Confirm that these contents are provide d.

 Model RM3543 or

RM3543-01 (with GP-IB included)......... ... ...1

 Power Cord (2-line + ground)(p. 22)
 EXT I/O Male Connector (p. 100)

 Instruction Manual (This document)............ 1

 Operation Guide.......................................... 1

Thank you for purchasing the HIOKI Model RM3543/ RM3543-01 Resistance HiTester.
To obtain maximum performance from the instrument, please read this manual first, and keep
it handy for future reference.

Model RM3543-01 is the same as the RM3543, but with GP-IB included.

Registered trademarks

Windows and Visual Basic are registered trademark of Microsoft Corporation in the United
States and/or other countries.

Verifying Package Contents

Inspection

3

Introduction

Content confirmation

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4

Measurement Probes and Fixtures

(connect to measurement jacks)

 Model 9140 4-terminal Probe

 Model 9500 4-terminal Probe

 Model 9262 Test Fixture

 Model 9263 SMD Test Fixture

Alligator-clip-type measurement
probes. These general-purpose
dual-electrode clips fit a wide
range of conductor thicknesses.

Rubber-sheathed alligator-clip­type measurement probes. This
design is ideal for 4-terminal­pair resistance measurement
applications, for example mea­suring standard resistors

This fixture is for measuring lead
components. (less than 10 m
residual resistance after zero
adjustment)

This fixture is for measuring chip
components. (less than 10 m
residual resistance after zero
adjustment)

Interface Cables

 Model 9637 RS-232C Cable

(9-pin to 9-pin/ crossover cable)

 Model 9638 RS-232C Cable

(9-pin to 25-pin/ crossover cable)

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

Verifying Package Contents

Options

Contact your dealer or Hioki representative for details.

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5

Safety Information

Safety Information

This instrument is designed to comply with IEC 61010 Safety S t andards , and has b een
thoroughly tested for safety prior to shipment. However, mishandling during use
could result in injury or death, as well as damage to the instrument. Using the instru­ment in a way not described in this manual may negate the provided safety features.
Be certain that you understand the instructions and precautions in the manual before
use. We disclaim any responsibility for accidents or injuries not resulting directly
from instrument defects.

This manual contains information and warnings essential for safe operation of the instrument and for main­taining it in safe operating condition. Before using it, be sure to carefully read the following safety precautions.

Safety Symbols

In the manual, the symbol indicates particularly important information that the user should read
before using the instrument.

The symbol printed on the instrument indicates that the user should refer to a corresponding
topic in the manual (marked with the symbol) before usi ng the relevant function.

Indicates AC (Alternating Current).

The following symbols in this manual indicate the relative importance of cautions and warnings.

Indicates that incorrect operation presents a significant hazard th at could result in serious injury or
death to the user.

Indicates that incorrect operation presents a possibility of injury to the user or dama ge to the instru­ment.

Indicates advisory items related to performance or correct operation of the instru ment.

Symbols for Various Standards

This symbol indicates that the product conforms to regulations set out by the EC Directive.

WEEE marking:
This symbol indicates that the electrical and electronic appliance is put on the EU market after August
13, 2005, and producers of the Member States are required to display it on the appliance under Arti­cle 11.2 of Directive 2002/96/EC (WEEE).

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6

Safety Information

Other Symbols

Indicates a prohibited action.

(p. )

*

[ ]
SET

(Bold characters)

Unless otherwise specified, “Windows” represents Windows 95, 98, Me, Widows NT4.0, Windows 2000,
Windows XP, or Windows Vista.

Click: Press and quickly release the left button of the mouse.
Double click: Quickly click the left button of the mouse twice.

Indicates the location of reference information.
Indicates that descriptive information is provided below.
Square brackets indicate instrument display labels (such as setting item names).

Bold characters within the text indicate operating key labels.

Accuracy

We define measurement tolera nces in terms of f.s. (full scale), rdg. (reading) and dgt. (digit) values, with the following mean­ings.

f.s. (maximum display value)

The maximum displayable value. This is usually the name of the currently selected range.

rdg. (reading or displayed value)

The value currently being measured and indicated on the measuring instrument.

dgt. (resolution)

The smallest displayable unit on a digital measuring instrument, i.e., the input value that causes the
digital display to show a “1” as the least-significant digit.

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Operating Precautions

The instrument can be used with the stand (p. 16).
It can also be rack-mounted. (p. A11).

50 mm or more

10 mm or more

Rear

50 mm or more

Unplugging the power cord
kills power to the instrument.
Be sure to provide enough
unobstructed space to unplug
the power cord immediately
in an emergency.

Follow these precautions to ensure safe operation and to obtain the full benefits of the various
functions.

Preliminary Checks

• Before using the instrument for the first time, verify that it operates normally to ensure that
no damage occurred during storage or shipping. If you find any damage, contact your
dealer or Hioki representative.

• Before using the instrument make sure that the insulation on the powe r co rd is unda mag ed
and that no bare conductors are improp erly exposed. Using the instru ment in such condi­tions could cause an electric shock, so contact your dealer or Hioki representative for
repair.

• Before using the instrument, make sure that the insulation on the measurement cables is
undamaged and that no bare metal is improperly exposed. If there is any damage, mea­sured values may be unstable and measurement errors may occur.

7

Operating Precautions

Instrument Installation

Storage temperature and humidity : -10°C to 50°C at 80% RH or less (non-condensating)
Operating temperature and humidity : 0 to 40°C at 80% RH or less (non-condensating)

Avoid the following locations that could cause an accident or damage to the instrument.

Installation Precautions

Exposed to direct sunlight
Exposed to high tempera­ture

Exposed to water, oil, other
chemicals, or solvents
Exposed to high humidity
or condensation

Exposed to high levels of
particulate dust

Subject to vibration

In the presence of corrosive or ex­plosive gases

Exposed to strong electromag­netic fields
Near electromagnetic radiators

Near induction heating systems
(e.g., high-frequency induction
heating systems and IH cooking
utensils)

• The instrument should be operated only with the bottom downwards.

• Do not place the instrument on an unstable or slanted surfa ce.

• Vents must not be obstructed.

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8

Operating Precautions

Handling the Instrument

• Do not allow the instrument to get wet, and do not take measurements with wet

hands. This may cause an electric shock.

• Do not attempt to modify, disassemble or repair the instrument; as fire, electric

shock and injury could result.

To avoid damage to the instrument, protect it from physical shock when transporting and
handling. Be especially careful to avoid physical shock from dropping.

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

Handling the Cords and Probes

• Avoid stepping on or pinching cables, which could damage the cable insulation.

• To avoid breaking the cables, do not bend or pull them.

• To avoid damaging the power cord, grasp the plug, not the cord, when unplugging it from
the power outlet.

• When disconnecting the BNC connector, be sure to release the lock before pulling off the
connector. Forcibly pulling the connector without releasing the lock, or pulling on the cable,
can damage the connector (p. 23).

• Use only the specified connection cables. Using a non-specified cable may result in incor­rect measurements due to poor connection or other reasons.

• Before using a test fixture, read the instructions provided with it.

Before Turning Power On

Before turning the instrument on, make sure the supply voltage matches that indi­cated on its power connecto r. Connection to an improper supply vo ltage may damage
the instrument and present an electrical hazard.

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Before Connecting EXT I/O

To avoid electric shock or damage to the equipment, always observe the following
precautions when connecting to the EXT I/O connector.

• Always turn off the power to the instrument and to any devices to be connected

before making connections.

• Be careful to avoid exceeding the ratings of external terminals (p. 95).

• During operation, a wire becoming dislocated and contacting another conductive

object can be serious hazard. Use screws to secure the external connectors.

• Ensure that devices and syste ms to be connected to the EXT I/O ter minals ar e prop-

erly isolated.

• The ISO_5V pin of the EXT I/O connector is a 5 V power output, and the ISO_12V pin

is a 12 V power output. Do not apply external power to this pin.

To avoid damage to the instrument, observe the following cautions:

• Do not apply voltage or current to the EXT I/O terminals that exceeds their ratings.

• When driving relays, be sure to install diodes to absorb counter-electromotive force.

• Be careful not to short-circuit ISO_5V to ISO_COM.

• Be careful not to short-circuit ISO_12V to ISO_COM.

• Do not draw loads from ISO_5V and ISO_12V at the same time.

See: "Connector Type and Signal Pinouts" (p. 90)

9

Operating Precautions

Before Measuring

• Do not apply any voltage to the measurement jacks. Doing so could damage the instru­ment.

• Never attempt to measure at a point wher e voltage is pr esent. In particular, do not measure
a transformer or motor immediately after a temperature increase test or withstand-voltage
test, as the instrument could be damaged by induced voltage or residual charge.

• Battery internal resistance cannot be measured with this instrument. It will sustain damage.
To measure battery internal re sistance, we recommend the HIOKI 3554, 3555, BT35 62,
BT3563, and 3561 Battery HiTesters.

• To obtain the guaranteed measurement accuracy, allow at least 30 minutes warm-up.

• The instrument internally retains all settings (but not measured values), such as measure­ment range and comparator settings. However, measurement settings made through the
RS-232C or GP-IB interface are not memorized.

• The DC resistance of a power transformer cannot be measured. Do not measure objects
with a large L (100 H or higher in the 10 m to 100  range, or 10 H or higher in the
1,000  range), such as choke coils and other inductors. In such cases, contact your
dealer or Hioki representative.

• You may be unable to obtain accurate measured values when there is a capacitance com­ponent in parallel with the measurement target. For this instrument, any parallel capaci­tance component should be limited to a maximum of 1,000 pF.

• Carefully insulate all H
cannot be performed and an error will occur if core and shield wires touch.

• During measurement, a transient current equal to about 1.5 times the steady-state current
will flow for several microseconds (or about 10 mApk in the 1 k range). Exercise special
care when measuring targets whose characteristics are prone to vary.

CUR

, H

POT

, L

POT

, and L

wiring. Proper 4-terminal measurements

CUR

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1.1 Product Overview and Features

The Hioki RM3543 Resistance HiTester employs the 4-terminal method to quickly and accurately measure
the DC resistance of components such as resistors and current sensing resistors. It includes advanced con­tact-check, comparator, and data output functions. The intuitive user interface and high noise immunity are
ideal for use with taping machines and separators.

Resistance Measurement

The factory defaults (initial settings)
are optimized for current sensing re­sistors measurements.

Interface
Communications

Connect the instrument to a
controller via the RS-232C
or GP-IB interface to control
measurement data acquisi­tion (p. 101).

Send Measurement Data and
Calculation Results to a
Printer

Use a commercially available print­er with a serial interface to print
measured values and calculation
results (p. 83).

Save and Output Measured
Values

Measured values can be stored in
internal memory (p. 73)
Statistical calculations can be per­formed on the stored data, which
can be transferred to a computer in
batch form (however, stored data
cannot be confirmed internally).

Judge Measured Values

Measured values are compared
with a pre-specified referenc e value
or thresholds, and the result is out­put externally and indicated by the
COMP indicators (comparator func­tion, p. 34).

Connect a PLC or
I/O Board

To control from a PLC, con­nect to the EXT I/O connec­tor. In addition to comparator
results, various measurement
anomaly signals can be out­put (p. 89).

Upper limit

Lower limit

Compare Two Instrument’s
Setting Conditions

When measuring with two inter­connected instruments, settings
are compared, and an alarm is
output and measurement is inhib­ited if the settings differ (Settings
Monitor function, p. 56).

Optional Hioki probes and fixtures
are available to connect to the mea­surement jacks (BNC jacks, p. 4).
Alternatively,
commercially
available cables
such as 1.5D-2V
coax can be used
(p. 24).

Overview Chapter 1

1.1 Product Overview and Features

11

1

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12

Ultra Fast and Accurate Measurements
Increase Productivity

The RM3543 is ideally suited for use in testing current
sensing resistors, where there has been remarkable
progress in lowering resistance values.
Measurement from which the effects of thermal EMF
are consistently eliminated (by the OVC function)
yields a resolution of 0.01

 in the 10 m range.

Since measurement results are obtained by means of
a PASS/FAIL judgment process with a resolution of

0.001%, the instrument can test resistors of 1 m and
less at a high rate of speed. Thanks to proprietary ul­tra-fast, high-stability circuit technology, the RM3543
completes the sequence of contact improvement,
measurement and contact check, and judgment out­put in just 1.6 ms.

Specially designed for current sens in g resis­tors

Thanks to its scaling function, the RM3543 can com­pensate for the difference between resistance values
obtained at the time of mounting on the board and dur­ing testing. By using the averaging function during su­per-low-resistance measurement with a small
detection voltage, it is possible to achieve even higher
levels of accuracy.

Multiple Interfaces

EXT I/O is isolated from the measurement and control
circuits to provide noise immunity (p. 89).
All data can be acquired in real time using the built-in

38.4-kbps high-speed RS-232C interface. Connect
the commercially available printer with a serial inter­face to print measured values and statistical calcula­tion results (p. 83).
The GP-IB interface is available for Model RM3543-01
(specified when ordering, p. 101).

Clearly Visible Display and Intuitive Opera­tion

High-contrast LCD provides clear visibility, helping
avoid setting mistakes. The optimum range is selected
automatically when comparator thresholds are en­tered.

Auto Memory Function Convenient for Sam­pling Tests (p. 75)

The auto memory function is convenient for sampling
tests after screen-printing. Measured values are auto­matically acquired as soon as they stabilize, and statis­tical calculations proceed until the specified quantity is
obtained, upon which an alert notification (alarm) oc­curs. Selecting [PRINT] (screen display) prints mea­sured values and statistical calculation results (p. 86).

Fixtures for Component Measurements (p. 4)

The BNC-type measurement jacks exhibit good noise
immunity. Ready availability and easy assembly en­sure smooth system setup. Various test fixtures are
available for Hioki LCR HiTesters.

Features

High-Speed Data Output and Ample Memory

The Data Output function transfers measured data at
5 ms/sample, even via RS-232C. Up to 30,000 mea­surements can be stored, and all data can be exported
at the end of measuring each reel. This function is ide­al for system setup, debugging and process manage ­ment.

1.1 Product Overview and Features

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Reliable Contact Checkin g (p. 49)

Contact checking (that was previously performed be­fore and after measuring) is now performed during mea­surement, so probe bounce and contact resistance
fluctuations can be detected. Contact checking time can
be shortened, improving tact times.

Features

Measurement Circuit Strongly Immune to
Contact Resistance Fluctuations

The effects of contact resistance fluctuations are re­duced even when scattering occurs near the end of
probe life. Such effects are minimized by the fast re­sponse of the measurement circuit.

Contact Improver Function (p. 50)

The Contact Improver function improves bad contacts
between probes and test samples. Contacts errors are
reduced by penetrating oxidation and impurities be­tween probes and samples. Reducing contact errors
can increase productivity and quality. The intensity of
the contact improver function can be adjusted accord­ing to probe type.

Reject Faulty Data –
Voltage Level Monitor Function (p. 52)

When the contact resistance of the H

CUR

and L

CUR

leads fluctuates, the measurement current changes
momentarily. Such momentary changes are not detect­able by typical contact checking. The Voltage Level
Monitor function detects a contact error if the detection
voltage changes significantly, which can increase the
reliability of measured values.

Minimize Human Error and Risk –
the Settings Monitor Function (p. 56)

If the settings of two instruments are different, trigger­ing is inhibited and an alarm notification is generated
to avoid setting mistakes due to human error.

Reliable Four-Terminal Measurement –
Probe Short-Circuit Detection Function
(p. 54)

Four-terminal measurements are inhibited when a
conductive foreign object is present between the
POT and CUR probe tips. Short-circuit probe anoma­lies are detected by checking the resistance between
these tips when not measuring.

Strong Electrical Noise Immunity

The specified measurement accuracy is achieved
even with ±1.5 kV mixed pulse noise. The floating
measurement section design is highly impervious to
electrical noise, minimizing the effect on measured
values even when turning large-induction motors on
and off. The free-range power supply input (90 to 264
V) is practically unaffected by voltage fluctuations, so
stable measurements are possible even in under
poor power conditions.

Previously

Model
RM3543

Contact Condition

Contact Check

Measuring

Probe Bounce

Contact
Condition

Detection
Voltage

Error

Good Contact

Poor Contact

Excessive detection
voltage fluctuation error

Good Contact

ERROR

Measurement
Status

Contact Check

Contact Condition
Contact Improver

Function

Contact Improvement

Measuring

Checking

ONON

DUT

Foreign object

POT

CUR

DUT electrode

13

1.1 Product Overview and Features

1

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14

AB

C

D

E

F

G

H

I

E

D

1.1 Product Overview and Features

Block Diagram

• Constant current (determined by the measurement range) is applied between the H

age is measured between the H
voltage (B) by the constant current flow (A).

POT

and L

terminals. The resistance value is obtained by dividing the measured

POT

CUR

and L

terminals while volt-

CUR

• The effects of large offset voltage such as from thermal emf are reduced by current flowing in the positive and negative

directions (A).

• The constant current source (A) and voltmeter (B) circuit designs are largely unaffected by contact resistance.

• Faulty measurement values caused by unstable or chattering contact conditions can be eliminated by monitoring (C)

the detection voltage (B) waveform (Volta ge Le ve l Mo ni to r fu nction).

• Before measuring, the Contact Improver circuit (D) optimizes contact when the probes touch the DUT.

• By also performing contact checking (E), short circuits between CUR and POT terminals caused by a clogged probe tip

can be detected (probe short-circuit detection function).

• When measurement starts, the contact check circuit (E) and constant current monitor (F) are activated to monitor for

fault conditions while measuring. The dual-CPU (C and G) design provides ultra-high-speed measurements and fast
system response.

• Immunity from electrical noise is provided by isolation between the Measurement and Control blocks (H).

• The auto-ranging 100-to-240 V switching power supply (I) can provide stable measurements even in poor power quality

environments.

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Display Screen

Monochrome graphical LCD
There are three general screen
types: Measurement, Basic Set­tings and Detailed Settings.

Screen Configurations (p. 17)

Judging measured values (p. 34)

(Comparator function)
Set a reference value and range for judging
measurements, which can be confirmed by
the COMP indicators.

Select this to judge measured val­ues relative to a reference value
and tolerance (%). The REF% set­ting display appears.

Press to judge measured values
relative to upper/lower thresholds.
The ABS setting display appears.

Setting

POWER Button

Turns the instrument on and
off (p. 26).

• Unlit: power off

(when no power supplied)

• Red light: power off

(while power is supplied)

• Green light: power on

Power On/Off

Entering numerical values

Enter a numerical value.
(we call these the “tenkeys”)

Switches the sign of a numer­ical value.

Selects the unit of measure.
Sets the tolerance values.

Deletes the value in the se­lected field.

Accepts the displayed com­parator threshold values.

Aborts comparator setting
and returns to the previous
display.

Measurement Terminals

Connect measurement cables or a fix­ture (p. 23).

• H

CUR

jack: Current source terminal

• H

POT

jack: Detected voltage high

terminal

• L

POT

jack: Detected voltage low ter-

minal

• L

CUR

jack: Measurement current

detected terminal

• GUARD jack: Shield (measurement

ground) terminal

Connecting Probes

COMP indicator
LEDs

Indicate the decision re­sult of the measured
value (p. 34).

Hi Measured value is

above upper limit

IN Pass (meets crite-

ria)

Lo Measured value is

below lower limit

Viewing

Comparator

Results

Viewing Measured

Values and Settings

Audible Alarm
(beeper)

Selecting the setting contents

(“the F keys”) F1 to F4 keys
Selects the corresponding
item on the right side of the
display.

Cursor keys
Move among the displayed
setting items.
The cursor location is indicat­ed by reverse characters.

1.2 Names and Functions of Parts

1.2 Names and Functions of Parts

Front Panel

1

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Manufacturer's Serial Number

Shows the serial number. Do not remove this label, as
it is required for product support.

Connect the supplied power cord (p. 22).

Connecting the Power Cord

RS-232C Connector

The RS-232C interface can be used to connect to
a PLC or computer (p. 101).
It is also used by the commercially available printer
with a serial interface (p. 83).

RS-232C Communications

Printer Output

GP-IB Connector (RM3543-01 only)

The GP-IB interface can be used to connect to a computer
(p. 101).

GP-IB Communications

SET MONITOR Connector

Connect another RM3543 here to compare instru­ment settings (p. 56).

Compare Two Instruments’

Settings

EXT I/O Connector

Connect to a PLC or I/O board to control
measurement start, and to acquire com­parator results (p. 89).

External Control

Bottom Panel

Stand

When using the stand

Extend the stand until it clicks into place.
Make sure to extend both legs of the stand.

Collapsing the stand

Fold in the stand until it clicks into place.

This instrument can be rack mounted.

See: "Appendix 5 Rack Mounting" (p. A11)

Parts removed from this instrument should be stored in
a safe place to enable future reuse.

Do not apply heavy downward pressure with the
stand extended. The stand could be damaged.

1.2 Names and Functions of Parts

Rear Panel

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Detailed Settings Screens (p. 19)

Measurement Settings Screens
[MEAS SETTINGS]

Data Settings Screens
[DATA SETTINGS]

System Screens
[SYSTEM]

Measurement Screen (p. 18)

Basic Settings Screen (p. 18)

Return to Previous Screen

Indicates a Continued Screen

Return to Previous Screen

1.3 Screen Organization

1.3 Screen Organization

The instrument has three general display screen types: Measurement, Basic Settings and Detailed
Settings.
Refer to "11.3 Error Displays and Remedies" (p. 185) for error displays.

The screen examples in this guide appear reversed (black on white) for best visibility on the printed page.
However, the instrument screens can actually be displayed only as white characters on black background.

1

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Measurement Screen

This screen normally appears while measuring. View cur­rently measured values and measurement conditions.
Some parts of the display depend on the comparator
mode and other settings.

Measured Value

Settings Menu (corresponding to F keys)

Displayed contents depend on the curre nt function set­tings.
Parentheses ( ) indicate the corresponding F-key

MENU (F1) Displays the Basic Settings screen
PRINT (F2) Print (p. 85)

Appears only when the interface is
set for the printer

ST AT (F3) Statistical calculation results (p. 78)

Appears only when statistical calcu­lation is enabled

NUMBER (F4) Set Auto-Memory number (quantity)

(p. 75)
Displays the number of stored data

items and the number of passed and
failed products at the lower left.

UNDO (F3) Deletes the previously stored mea-

surement and calculation result (only
one can be deleted) (p. 80)
Appears only when calculation re­sults are displayed

ALLCLR (F4) Clears all memory and calculation

(p. 80)
Appears only when calculation re­sults are displayed

LOCAL (F1) Enables local control (p. 108)
UNLOCK (F1) Cancels the key-lock state (hold 1s)

(p. 64)

Criteria Setting Values (p. 34)
Displayed contents depend on the
selected comparator mode.
(Ex.: REF% mode)

To display the Basic Settings screen

Measurement Conditions

Shows current setting contents. Displayed contents de­pend on the current settings.

INT/ EXT Trigger source type (p. 30)
 Measurement range (p. 31)
FAST/ MED/ SLOW Measurement speed (p. 29)
0ADJ/

OFF (not shown)

Appears only when zero-adjust is
enabled (p. 32)

OVC/

OFF (not shown)

(OVC: Offset Voltage Compensa­tion)
Appears only when OVC is en­abled (p. 61)

SC/

OFF (not shown)

Appears only when the scaling
function is enabled (p. 44)

NUM Appears only when tenkey input is

enabled

RMT Remote control (p. 108)
M.LOCK Disables all operations except

comparator settings (p. 63)

F.LOCK Disables all operations including

comparator settings (p. 63)

Basic Settings Screen

Make basic measurement condition settings on this
screen. Measurement speed and range can be changed
while viewing measured values. (Trigger source: INT)

TRG

Change trigger source (measurement start
control method) (p. 30)
When EXT triggering is enabled, [MANU] ap-

pears beside the F4 key (press to trigger
measurement manually).

RANGE Change range (p. 31)
SPEED Change measurement speed (p. 29)
0ADJ Turn zero-adjust on/off (p. 32)
COMP Turn comparator on/off (p. 34)
LOCK Enable/disable key lock (p. 63)

Select measurement
condition settings
Move with cursor keys.

Measurement condition
setting selections

Return to previous screen

To display the [MEAS SETTINGS] screen
To display the [DATA SETTINGS] screen
To display the [SYSTEM] screen

MISC To display the Detailed Settings screen

1.3 Screen Organization

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Measurement Settings Screen
[MEAS SETTINGS]

Shows detailed settings for measurements.
Adjust the measurement speed, stability and measurement fault
detection functions.

DELAY1 Adjust the delay from probing to trigger

input (p. 42)

DELAY2 Adjust measurement object electrical re-

sponse (p. 42)

SCALING(A*R+B) Correct measured values with the scal-

ing function (p. 44)

INT (FAST/ MED/
SLOW)

Make fine adjustment to integration time
(p. 46)

AVERAGE Stabilize measured values with the aver-

aging function (p. 48)

CONT CHECK Contact check threshold setting (p. 49)
CONT IMP Contact Improver function setting (p. 50)
VOLT MONITOR Voltage level monitor function setting

(p. 52)

CURRENT MODE Current mode setting (p. 53)

Data Settings Screen
(Save, Analysis, and Output)
[DATA SETTINGS]

These are settings for memory and statistical calculation functions.

AUTO MEMORY Turn Auto-Memory on/off (p. 75)
STATISTICS Statistical calculation on/off (p. 78)
DATA OUT Automatically output measured values

(communications) (p. 81)

Detailed Settings Screens

1.3 Screen Organization

1

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Set instrument system-related settings on this screen.

SET MONITOR Turn two-instrument setting comparison

on/off (p. 56)

PROBE CHECK Turn probe short-circuit detection on/off

(p. 54)

RETRY Retry function setting (p. 59)
TRIG EDGE (External I/O) Set trigger rising/falling

edge (p. 98)

EOM (External I/O) Set EOM (end-of-mea-

surement) signal (p. 97)

INTERFACE Communications interface settings

(p. 105)

100m CURR 100 m range measurement current set-

tings
100 mA/1 A (p. 28)

CALIBRATION Self-calibration operation settings (p. 60)
JUDGE BEEP Comparator beeper settings (p. 66)
KEY BEEP Key beeper on/off (p. 65)
CLOCK (Y-M-D) Set internal clock (p. 68)
LINE FREQ Set power source frequency (p. 67)
CONTRAST Adjust screen contrast (p. 69)
BACKLIGHT Adjust screen backlight (p. 70)
RESET Initialize (p. 71)
ADJUST Instrument Adjustment (p. A16)

System Screen
[SYSTEM]

1.3 Screen Organization

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Install this instrument (p. 7)

1

Rear PaneFront Panel

Connect measurement cables
(p. 23)

Turn the power on (p. 26)

5

Connect to the test sample
When finished measuring, turn the

power off (p. 26).

Connect the external interface

(as needed)

4

• Using the printer (p. 83)

• Using the RS-232C or GP-IB interface
(p. 101)

• Connecting to a PLC or I/O board
(p. 89)

• Automatically comparing the settings
of two instruments (Settings Monitor
function) (p. 56)

Connect the power cord (p. 22)

2
3

2

3

4

5

Make instrument settings (p. 27)

6

Measurement

Preparations Chapter 2

Be sure to read the "Operating Precautions" (p.7) before installing and connecting this instrument.
Refer to "Appendix 5 Rack Mounting" (p. A11) for rack mounting.

2

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Rear Panel

1 Confirm that the mains supply voltage matches the

instrument, and connect the power cord to the power
inlet on the instrument.

2 Plug the power cord into the mains outlet.

The POWER button on the front panel lights red.
In event of a power outage, operation resumes with the same

settings when power is restored (breaker reset, etc.).

Power inlet

2.1 Connecting the Power Cord

2.1 Connecting the Power Cord

• Before turning the instrument on, make sure the supply voltage matches that indi-

cated on its power connector. Connection to an improper supply voltage may dam­age the instrument and present an electrical hazard.

• To avoid electrical accidents and to maintain the safety specifications of this instru-

ment, connect the power cord only to a 3-contact (two-conductor + ground) outlet.

• Before using the instrument, make sure that the insulation on the power cord is

undamaged and that no bare conductors are improperly exposed. Any damage
could cause electric shock, so cont act your dealer or Hioki representative.

To avoid damaging the power cord, grasp the plug, not the cord, when unplugging it from th e
power outlet.

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2.2 Connecting Measurement Cables and Test Fixtures

Example of defeated guard measurement

Connecting measurement cables

Connecting a fixture

Connect directly to the measurement
jacks with the label side up, and affix
with the levers on the left and right.

Connect the red plugs to the
H

CUR

and H

POT

jacks, and the

black plugs to the L

CUR

and

L

POT

jacks.

Black plugs

Red plugs

BNC Jack Guide Pins
(on the instrument)

Lock

BNC plug slots

2

1

Align the slots in the BNC plug with the
guide pins on the jack on the instrument,
then push and twist the plug clockwise
until it locks.
Disconnecting BNC connectors
Push the BNC plug, twist it counterclock­wise, and pull it out.

Making your own probes and extenders (p. 24)

Connection Methods

2.2 Connecting Measurement Cables and
Test Fixtures

23

Connect your measurement cables, optional Hioki probes or test fixture to the measurement jacks.
Refer to "Options" (p.4) for details. See the instructions provided with the fixture for operating
details.

• Do not apply a voltage to the measurement terminals. Doing so may damage the unit.

• When disconnecting the BNC connector, be sure to release the lock before pulling off the
connector. Forcibly pulling the connector without releasing the lock, or pulling on the cable,
can damage the connector.

• We recommend using optional Hioki fix­tures.

• Use the GUARD jack only for Faraday
shield, and avoid more than 10 mA cur­rent flow. This jack is not for guarding
network resistance measurements.

2

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24

Wiring Diagram

Before Wiring

See: "Appendix 3 Unstable Measurement Values" (p. A3)

• Twist together the H

POT

and L

POT

wires, and the H

CUR

and L

CUR

wires. If not twisted together, measured

values may be unstable, and errors may occur, when measuring with low resistance values.

• The phenomenon of induction becomes pronounced in the 10 m and 100 m ranges (when the mea­surement current is set to 1 A). Changes in the cab le p ositio n and co nfigur ation ma y cau se me asur ed va l­ues to vary. Exercise particular care so that the cable position and configuration do not change.
Additionally, measurement cables and measurement targets should be kept as far as possible from metal­lic objects.

• When using two or more RM3543 units, do not group the wires from multiple instruments together. The
"C.E. Volt" error display may be trigger ed by the phenomenon of induction.

• Refer to the block diagram (p. 14) for internal circuit details.

• Probes and measurement objects should be shielded at BNC or GUARD jack potential.

• Wiring resistance in excess of the following values may cause a current monitor error, making measure­ment impossible. When using measurement current 1 A ranges, keep the wiring resistance as well as the
contact resistance between the DUT and probe low.

Range

10m 100m 100m 1000m 10 100 1000

Measurement Current

1 A 1 A 100 mA 100 mA 10 mA 10 mA 1 mA

Between H

CUR

and DUT

1  1  18  18  180  180  1.8 k

Between L

CUR

and DUT

1  1  8  8  80  80  800 

2.2 Connecting Measurement Cables and Test Fixtures

Making Your Own Measurement Cables

Recommended Measurement Cable Specifications

Conductor resistance
Capacitance 150 pF/m or less

Cable dielectric material

Connector insulating material

Length 2 m or less

Example: JIS standard 3C-2V, 1.5D-2V MIL standard RG-58A/U
* Teflon is a registered trademark of E. I. du Pont de Nemours and Company.

500 m

/m or less

Polyethylene (PE), Teflon* (TFE), polyethylene foam (PEF)
Insulation resistance at least 10 G

Teflon* (TFE), polybutylene terephtalate (PBT)
Insulation resistance at least 10 G

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25

• Measurement cable length should not exceed 2 m (with con ductor re sist ance 5 00 m/m or less). Long

cables are more susceptible to noise, and measured values may be unstable.

• Extensions should maintain the four-terminal structure. If converted to a two-terminal circuit in the wir-

ing, correct measurement may not be possible due to the effects of wiring and contact resistance.

• Cables and measurement ob jects should be shielded.

• After extending measurement cables, confirm operation and accuracy ("Measurement Specifications"

(p.180)).

• If cutting the ends off of optional measurement cables, make sure that the shield does not touch the

center conductor of the H

CUR

, H

POT

, L

POT

and L

CUR

cables. Correct measurement is not possible with

a shorted cable.

• Do not twist wires from multiple units together.

Extending Measurement Cables

Observe the following when extending measurement cables:

2.2 Connecting Measurement Cables and Test Fixtures

2

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26

Press the POWER button (it lights green).

Self-test

Indicates an error (p. 185).

After Power-On

A self-test (instrument diagnostic routine) is performed.
During the self-test, the following information is displayed while the hardware is verified.

Error

No Errors

Normal display (measurement screen)

The following information is displayed during self-testing:

• Manufacturer and model name

• Firmware versions (main, and measurement)

• Communication setting

• Line frequency setting

2.3 Turning the Power On and Off

2.3 Turning the Power On and Off

Turning Power On

When the power is turned on, the same setting as when the power was last turned off
appears (backup function).
When powered up for the first time, the default settings appear.

See: "Default Settings" (p.72)

Before Starting Measurement

To obtain precise measurements, provide about 30 minutes warm-up after turning power on.
Measurement settings are recalled from when the power was previously turned off (settings
backup).
However, measurement settings made through the RS-232C or GP-IB interface are not
retained, although they can be stored using the

Turning Power Off

Press the POWER button (it lights red when the instrument is off).
Disconnect the power cord from the outlet to extinguish the POWER button light.
When power is turned on again, operation resumes with the same settings as when last
turned off.

If a power outage (e.g., breaker trip) occurs when the instrument is on, it will automatically
turn on again when power is restored (without pressing the POWER button).

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:SYSTem:BACKup command (p. 139).

27

Do not use the instrument if damage is
found, as electric shock or short-circuit
accidents could result. Contact your
dealer or Hioki representative.

Metal Exposed

Is the power cord insulation torn, or is
any metal exposed?

1

Before using the instrument for the first time, verify that it operates normally to ensure that no dam­age occurred during storage or shipping. If you find any damage, contact your dealer or Hioki repre­sentative.

Peripheral Device Inspection

Is the insulation on a measurement
cable torn, or is any metal exposed?

No Metal Exposed

If there is any damage, measured val­ues may be unstable and measure­ment errors may occur. Replace the
cable with an undamaged one.

Metal Exposed

No Metal Exposed

If damage is evident, request repairs.

Yes

Is damage to the instrument evident?

Instrument Inspection

When turning power on

Does the self-test screen appear
(model no., version no.)? (p. 26)

No

2

The power cord may be damaged, or
the instrument may be damaged inter­nally. Request repairs.

Does the Measurement screen appear
after self-test?

No

Yes

The instrument may be damaged inter­nally. Request repairs.

See: "11.1 Troubleshooting" (p. 183)

"11.3 Error Displays and Reme­dies" (p. 185)

An error indication
occurs (ERR)

Yes

Inspection complete

Please read the "Operating Precautions" (p. 7) before use.

3.1 Pre-Operation Inspection

Measurement Settings
(Basic Measurements)

Chapter 3

See "Measurement Flow" (p. 2) for an outline of the measurement process from preparation to end­of-measurement.

3.1 Pre-Operation Inspection

3

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Measurement Current: 100 mA

To achieve more precise measure­ment

Measurement Current: 1 A

To limit the effects of external noise

The Basic Settings screen appears.

1

The System screen appears.
[SYSTEM]

Selection

2

Selection

1

2

100 mA (default)
1 A

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

The confirmation screen appears.

3.2 Switching 100 m range Measurement Currents

3.2 Switching 100 m range Measurement
Currents

The 100 m range measurement current can be switched between 100 mA and 1 A. The 100 mA
setting (which is the factory default) allows measurement at a high level of precision. The 1 A setting
can be used to provide better resistance to external noise.

See: "(5) DUT Becomes Warm" (p. A6)

(Example)If the resistance to be measured is 100 m

(Measurement Current)
100 mA 100 m × 0.12 = 1 mW
1 A 100 m

× 1

2

= 100 mW

Open the Basic Settings screen.

1

Open the System screen.

2

Select the 100 m range measurement current.

3

Return to the Measurement screen.

4

• The 100 m range measurement condition settings are configured separately for each measurement cur­rent. Consequently, the 100 m range measurement condition settings should be configured after first set­ting the measurement current.

• During measurement, a transient current equal to about 1.5 times the steady-state current will flow for sev-

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eral microseconds (or about 10 mApk in the 1 k range). Exercise special care when measuring targets
whose characteristics are prone to vary.

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29

The Basic Settings screen appears.

1

Selection

2

See table below
(default)

Press the up/down cur­sor keys to change the
setting.

3.3 Setting the Measurement Speed

3.3 Setting the Measurement Speed

The measurement speed can be set to FAST, MED (medium), or SLOW. A slower measurement
speed provides greater measurement precision, and a faster measurement speed results in greater
susceptibility to environmental noise. Ensure that measurement cables and the sample are suffi­ciently shielded.

The averaging function can be used to further stabilize measured values. (p. 48)

Open the Basic Settings screen.

1

Select the measurement speed.

2

3

Return to the Measurement screen.

3

Relationship Between Measurement Range and Speed

(factory defaults)

Measurement Range



10m
Average: 16 times

 11 ms 17 ms

10m
100m

(1A)



100m
(100mA)

 2.0 ms 6.4 ms

1000m

10

 1.6 ms 6.0 ms

 1.6 ms 4.0 ms

100

 1.6 ms 4.0 ms

1000

FAST MED SLOW

176 ms 272 ms

*1

5.0 ms 13 ms

3.8 ms 13 ms

752 ms
640 ms

47 ms
40 ms

43 ms
36 ms

43 ms
36 ms

41 ms
35 ms

41 ms
34 ms

41 ms
34 ms

41 ms
34 ms

Integration time can be optionally set for each range (p. 46).
Upper value: for 50-Hz power line frequency
Lower value: for 60-Hz power line frequency
Tolerance:

(Without retry)
*1 When performing external trigger measurement.

When performing internal trigger measurement, same as
when averaging is off.

±10%±0.2 ms

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Trigger signals are automatically generated internally for continuous
measurement.

Measure with internal (INT) triggering

To measure automatically

Measurements are triggered by an external signal.
Manual measurement triggering is also available.

• Apply a trigger signal at the EXT I/O connector (p. 89)

• Send the TRG command by communications interface (p. 130)

• Press F4 [MANU] (only appears when EXT is selected)

Measure with external (EXT) triggering

To measure at specific times
To retain measured values

• When internal triggering is enabled, the EXT I/O TRIG signal and the “TRG” command are ignored
(except for memory storage and statistical calculations).

• When using the internal trigger, the delay time (DELAY1) is obtained by adding 100 ms to the setting (to
prevent heat generation).

• To measure samples such as inductors that require time to settle, adjust delay time DELAY2. Start with
a long delay, and gradually shorten it while watching for the measured value to settle.

See: "4.2 Setting Pre-Measurement Delay" (p. 42)

• When external triggering is enabled, the Auto-Memory function is disabled by force.

The Basic Settings screen appears.

1

Selection

2

Internal trigger
External trigger

(default)

Press F3 [EXT] to display the F4 [MANU] indicator.
Press to trigger a measurement manually.

Press the up/down
cursor keys to
change the setting.

3.4 Setting Measurement Start Conditions (Trigger Source)

3.4 Setting Measurement Start Conditions
(Trigger Source)

Measurements can be started in two ways.

Open the Basic Settings screen.

1

Select internal (INT) or external (EXT) triggering.

2

Continuous measurement (:INITIATE:CONTINUOUS ON) is the normal trigger state when operating from
the front panel. Selecting the internal (INT) trigger source activates continuous triggering ("free-run"). When

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external (EXT) triggering is selected, each external trigger event initiates one measure ment. Continuous mea­surement can be disabled by sending the
IB. When continuous measurement is disabled, trigger acceptance is controlled only by the host (computer or
PLC).

See: for trigger command: "Triggering" (p. 142), "9.8 Data Exporting Methods" (p. 152)

Return to the Measurement screen.

3

:INITIATE:CONTINUOUS OFF command via RS-232C or GP-

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31

The Basic Settings screen appears.

1

Selection

2

Press the up/down
cursor keys to
change the setting.

Increments the
range

Decrements the
range

3.5 Selecting the Measurement Range

3.5 Selecting the Measurement Range

The measurement range can be set as follows. When making comparator settings with the panel
keys, the measurement range is selected automatically according to the settings (reference/toler­ance or upper/lower thresholds, see the following table). When the comparator settin gs are made by
remote control commands, the measurement range is unaffected.

Changing the Range

Measurement error is larger when measuring values nearer the bottom of a measurement range.

Auto-Ranging (when making comparator settings)

Reference (REF%) and
Upper/Lower Threshold (ABS) Ranges

0 to 10.009 m 10 m

10.01 to 100.09 m 100 m

100.1 to 1000.9 m 1000 m

1.001 to 10.009  10 

10.01 to 100.09  100 

100.1 to 1200.0  1000 

Selected Range

3

Manual Range Selection

Open the Basic Settings screen.

1

Select the range.

2

• 10m, 100m, 1000m, 10, 100, 1000 (default)

Return to the Measurement screen.

3

• The measurement range is automatically selected when using the comparator function, but an OvrRng
error may occur when the scaling function is on. If this occurs, set an appropriate range manually.
For example, the 1,000 m range will be selected under the following conditions, but the measurement tar­get of 2  will result in an OvrRng error:

Measurement target: 2 
Scaling compensation coefficient: 0.5
Displayed measured value: 1 
Comparator reference value: 1 

• During measurement, a transient current equal to about 1.5 times the steady-state current will flow for sev­eral microseconds (or about 10 mApk in the 1 k range). Exercise special care when measuring targets

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whose characteristics are prone to vary.

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32

The Basic Settings screen appears.

1

Selection

2

Internal trigger

Press the up/down cur­sor keys to change the
setting.

1

Selection

2

Disable zero adjustment (cancel)
Execute zero adjustment

3.6 Zero Adjustment

3.6 Zero Adjustment

When four-terminal measurement (Kelvin connection) is impractical such as when measuring very
small samples, the additional inherent resistance of the two-terminal wiring should be canceled out.
The zero-adjustment function can cancel out up to 10  additional resistance.

Before Zero Adjustment

• The guaranteed accuracy of the instrument applies to four-terminal connections without zero adjustment.
When using four-terminal connections, do not execute zero adjustment. Executing zero adjustment with
incorrect wiring may amplify measurement error. However, zero adjustme nt may be nee ded even with four­terminal measurements if they are affected by a large offset voltage, such as due to thermal emf.

• Execute zero adjustment when the ambient temperature has changed, or when a probe is replaced.

Execute zero adjustment after the warm-up period following power on.

Open the Basic Settings screen.

1

Select the internal (INT) trigger mode.

2

Short the probes together.

3

Confirm that the measured value does not exceed 10 .

4

If no measured value is displayed, increment the measurement range (p. 31).

Select whether to enable or disable zero adjustment.

5

After confirming that the measured value does not exceed 10 , execute zero adjustment.

Return to the Measurement screen.

6

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Zero Adjustment Faults

If zero adjustment fails, the following error message appears.

33

3.6 Zero Adjustment

Before attempting zero adjustment again, confirm the following:

• With the 10  range selected, confirm that the displayed value does not exceed 10 .

• Confirm that the probe connections are correct.

When the scaling calculation function is on, you may be unable to zero out the measured value, even if you
perform zero adjustment (because the zero-adjusted measured value is still subject to scaling calculation).

3

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34

Measured value is above
upper limit

Pass (meets criteria)

Measured value is below
lower limit

Select the REF% (relative values) decision
mode

Decide whether a measured value is
within specified tolerance limits rel­ative to a specified reference value
(p. 35)

Select the ABS (absolute values) decision
mode

Decide whether a measured value is
between specified upper and lower
threshold values (absolute values)
(p. 37)

12.000 m .... reference value

+0.080%........ positive tolerance

-0.080%......... negative tolerance

example

100.00 m .... upper threshold

80.00 m ...... lower threshold

example

Hi
IN
IN
Lo

Hi
IN

Lo

Positive
tolerance [%]

Reference value [

]

Negative
tolerance [%]

Upper
threshold [

]

Lower
threshold [

]

3.7 Judging Measured Values (Comparator Function)

3.7 Judging Measured Values
(Comparator Function)

Comparator results are available as external output (at the
EXT I/O connector) when the comparator reference/tolerance
or upper/lower threshold values have been set.

See: "Chapter 8 External Co ntrol" (p. 89)

Comparator results are also indicated by the COMP Hi/IN/Lo
panel lamps, and by audible beeper (disabled by default).

See: "Setting the Comparator Decision (“JUDGE”) Beeper" (p. 66)

The comparator decision mode can be set as one of the following:

Before Using the Comparator Function

• When the measured value is out of the selected measurement range, comparator decision indicators
appear as follows. In the event of a measurement fault, no decision is made.

See:"3.8 Confirming Faulty Measurements" (p. 38)

Out-of-Range Display Comparator Decision Indicator

+OvrRng Hi

-OvrRng Lo

• If power is turned off during comp arator setting, changes to settings are lost as they revert to their previous
values. To accept the settings, press the ENTER key.

• When setting comparator criteria, the appropriate range is selected automatically. Refer to "Auto-Ranging
(when making comparator settings)" (p. 31) for range settings.

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3.7 Judging Measured Values (Comparator Function)

The Basic Settings screen appears.

1

Selection

2

Disable the function
Enable the function

Press the up/down
cursor keys to
change the setting.

(When the function is disabled)
Comparator decisions are indicated only when the function is enabled.

Relative Value =
(tolerance)

Reference

Value

Measured

Value

- 1

X 100 [%]

Setting range:

-9.999% to +9.999% (When 10% or less)

-99.99% to +99.99% (When more than 10%)

Reference value
Positive tolerance (upper decision threshold)
Negative tolerance (lower decision threshold)

Enabling and Disabling the Comparator Function

The comparator function is enabled by default.
When the function is disabled, comparator settings are ignored.

Open the Basic Settings screen.

1

Enable or disable the comparator function.

2

35

3

Return to the Measurement screen.

3

Decide According to Reference Value and Tolerance (REF% Mode)

Example: Set a reference value of 10.5

To abort the setting process, press . Settings are abandoned and the display returns to the previous
screen.

 with ±4.5% decision tolerance.

Open the relative tolerance setting screen.

1

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36

Selection

1

To Reset Numerical Values

Deletes entered digits.
This key is enabled only when en­tering numerical values.

To change the value after selecting the
units, use the cursor keys to select
the item to change, then enter the new val­ue with the tenkeys.

1_ 10_ 10._ 10.5_ 10.500

m

(Example: 10.5m)

2

Selection

To Reset Numerical Values

Deletes entered digits.
This key is enabled only when enter­ing numerical values.

To change the value after selecting the
units, use the cursor keys to select
the item to change, then enter the new val­ue with the tenkeys.

To Set a Negative Value

Press this key to change the sign,
as needed.

1

+4_ +4._ +4.5_ +4.500%

(Example: 4.5%)

2

Selection

• Internal calculations are performed on floating-point values, and decisions round up any fraction of the

least-significant digit.

• Displayed values of the reference and tolerances are rounded according to the selected range. Internal

calculations use unrounded data, so decisions are based on the entered (setting) values.

• An error message appears if you press ENTER with the positive tolerance set lower than the negative

tolerance.

See: "11.3 Error Displays and Remedies" (p. 185) (ERR:001)

3.7 Judging Measured Values (Comparator Function)

Set the reference value.

2

Pressing an inoperative key during setting sounds a low-pitch beep (when the key beeper is enabled).

Press the units key to accept the setting and move the cursor to the positive tolerance.

Set the positive tolerance.

3

Press the % key to accept the setting and move the cursor to the negative tolerance value.
The negative tolerance is initially set to the same amplitude as the positive tolerance (change as needed).

Set the negative tolerance in the same way (as needed).

4

Accept the settings and return to the Measurement screen.

5

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37

Upper threshold
Lower threshold

1_ 15_ 150_ 150.0m

(Example: 150 m)

Selection

To Reset Numerical Values

Deletes entered digits.
This key is enabled only when enter­ing numerical values.

To change the value after selecting the
units, use the cursor keys to select
the item to change, then enter the new val­ue with the tenkeys.

1

2

1

2

Selection

(Example: 50 m)

5_ 50_ 50.0m

• Internal calculations are performed on floating-point values, and decisions round up any fraction of the

least-significant digit.

• Displayed values of the reference and tolerances are rounded according to the selected range. Internal

calculations use unrounded data, so decisions are based on the entered (setting) values.

• An error message appears if you press ENTER with the positive tolerance set lower than the negative

tolerance.

See: "11.3 Error Displays and Remedies" (p. 185) (ERR:001)

3.7 Judging Measured Values (Comparator Function)

Decide According to Upper/Lower Thresholds (ABS Mode)

Setting example: Upper threshold 150 m, lower threshold 50 m

To abort the setting process, press . Settings are abandoned and the display returns to the
previous screen.

Open the absolute value threshold setting screen.

1

Set the positive tolerance.

2

Pressing an inoperative key during setting sounds a low-pitch beep (when the key beeper is enabled).
No error message is displayed.

3

Press the units key to accept the setting and move the cursor to the lower threshold value.

Set the negative tolerance in the same way.

3

Press the units key to accept the setting and move the cursor to the upper threshold.

Accept the settings and return to the Measurement screen.

4

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38

Appears when the measured value is outside of the measurement or display range.
Check for a broken sample component.
The comparator result is Hi when +OvrRng is displayed, and Lo when -OvrRng is displayed.
No external measurement fault signal (ERR

) is output.

Out-of-Range

The resistance between the H

POT

and H

CUR

probe contacts, and between the L

POT

and L

CUR

probe contacts, are measured and compared with specified contact fault values.
An error message appears when the measured value reaches or exceeds the specified contact fault
values.
If this error persists, probe wear or cable failure may be the cause.
If the error is not cleared by shorting the tips of a known-good measurement cable, the instrument
requires repair.

Contact Check Fault

This method monitors the stability of the voltage between H

POT

and L

POT

probe contacts.
An error message appears when voltage instability is detected due to chattering of the probe con­tacts.
If this error persists, the probes may be degraded due to wear.
C.E. Volt may also be displayed when external noise is strong.

Voltage Level Monitor Fault

See: "Out-of-Range Detection Function" (p. 39)

See: "4.6 Checking for Poor or Improper Contact

(Contact Check Function)" (p. 49)

See: "4.8 Detecting Measurement Voltage Faults

(Voltage Level Monitor Function)" (p. 52)

This display appears after changing measurement settings and before the next measurement is
performed.

- - - - - - -

Display Examples: Display Measurement State and Appearance with Open-Circuit Probe

Display Measurement State

Current Monitor Results
Normal (PASS) Fault (FAIL)

Contact Check Results
Voltage Level Monitor

Results

Normal
(PASS)

Display: Measured Value
COMP indicator: According to the
measured value

Display: +OvrRng
COMP indicator: Hi
(when connection to the measure­ment object is broken)

Fault

(FAIL)

Display: C.E. Hi/ C.E. Lo/ C.E. Volt
COMP indicator: No decision
EXT I/O: ERR

signal output

Display: C.E. Hi/ C.E. Lo/ C.E. Volt
COMP indicator: No decision
EXT I/O: ERR signal output

+OvrRng

-OvrRng

C.E. Hi
C.E. Lo

C.E. Volt

Display

Display

Display

This method monitors the regulated measurement current for normal flow through the DUT.
An error is detected mainly when a measurement fault occurs due to an open-circuit DUT or between the H

CUR

and

L

CUR

probe's poor contacts.

The error display depends on the contact check and voltage level monitor states (see the table below).

Current Monitor Fault

See: "Current Monito r Function" (p. 39)

The measurement fault display differs according to detection order

and settings.

3.8 Confirming Faulty Measurements

3.8 Confirming Faulty Measurements

When a measurement is not performed correctly, a measurement fault indicator appears and a
measurement fault signal is output at the ERR
detection).
The instrument detects measurement faults by the following four methods.

pin of the EXT I/O connector (except for out-of-range

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Measurement Fault Detection Order

NoNoNoNoNo

No

No

Measurement Fault Detection Display EXT I/O signal

39

3.8 Confirming Faulty Measurements

Probe Short Circuit

Yes

Hi Wiring Contact Error

Yes

Lo Wiring Contact Error

Yes

Voltage Level Monitor Error

Yes

Constant-Current Error

Yes

Below Lower Limit

Yes

Above Upper Limit

Yes

No Measurement Data

Out-of-Range Detection Function

ERR: 021

C.E. Hi

C.E. Lo

C.E. Volt

+OvrRng

-OvrRng

+OvrRng

- - - - - - - -

PRB_SHORT output,
ERR output

ERR output,

output

CE_HI

ERR output,
CE_LO output

ERR output

HI output

LO output

HI output

Measurement fault detection
proceeds in the order shown at
the left, ending with display of
the first detected error.

Corresponding measurement
fault signals are also output at
the EXT I/O connector.

3

Examples of Out-of-Range Faults

Out-of-Range Detection Measurement Example
The measured value is outside of the

measurement range.
The relative tolerance (%) display of

the measured value exceeds the dis­play range (999.999%).

The zero-adjusted value is outside of
the display range.

While measuring, input voltage ex­ceed the A/D converter input range.

Attempting to measure 13  with the 10  range selected

Measuring 500  (+2400%) with a reference value of 20 

In the 1000 m range with 0.5  zero-adjustment in effect, measuring 0.1 
provides a zero-adjusted value of -0.4 , which is outside of the display range.

Measuring a large resistance value in an electrically noisy environment

Current Monitor Function

• The instrument supplies constant measurement current through the DUT via the H
current monitor fault occurs if constant current cannot be attained. If the contact check and voltage level

monitor results are normal, the out-of-range and comparator result displays indicate “Hi”.

• Wiring resistance in excess of the following values may cause a current monitor error, making measure­ment impossible. When using measurement current 1 A ranges, keep the wiring resistance as well as the
contact resistance between the DUT and probe low.

Range 10m 100m 100m 1000m 10 100 1000
Measurement Current 1 A 1 A 100 mA 100 mA 10 mA 10 mA 1 mA
Between H
Between L

and DUT 1  1  18  18  180  180  1.8 k

CUR

and DUT 1  1  8  8  80  80  800 

CUR

CUR

and L

probes. A

CUR

Example of Current Monitor Fault

• Broken DUT (open work)

CUR
CUR

or L
or L

•H

•H

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probe contact fault

CUR

cable break

CUR

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4.1 Making Range-Specific Measurement Settings

The Basic Settings screen appears.

The Measurement Settings Screen
appears.
[MEAS SETTINGS]

1

Selection

2

1

2

Selection

Customizing Measurement

Settings Chapter 4

(set as needed)

Change measurement settings as appropriate for your application.
Refer to "Detailed Settings Screens" (p. 19) for the available settings.

4.1 Making Range-Specific Measurement
Settings

41

4

These settings can be made for each range (except for the DELAY1 setting).

Open the Basic Settings screen.

1

Open the Measurement Settings Screen.

2

Select the range to use.

3

Set the items as needed.

4

The 100 m range measurement condition settings are configured separately for each measurement current.
Consequently, the 100 m range measurement condition settings should be configured after first setting the
measurement current (p. 28).

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42

The DELAY1 setting is common to all ranges. The default set­ting is 0 ms (corresponding to trigger signal input at the same
time as probe contacts become stable). Setting DELAY1 affects
measurements in all ranges.

Set DELAY1

Adjust this setting to allow for
probe contact mechanical stabili­zation.

Set DELAY2 to the time needed for stabilization after measure­ment current is applied, such as may be required for inductive
components. The setting affects only the selected range. The
default setting is 0 ms (corresponding to resistance measure­ment of non-inductive components).

Set DELAY2

Adjust this setting to allow for sta­bilization of the measurement
sample.

DELAY1 and DELAY2 Timing Chart

* Internal delay is provided to suit purely resistive (non-reactive) DUTs,

and is different for each measurement range.

Acquisition

Stable Contact

Internal

Delay*

Probe Contact
Condition

Start
TRIG

Measurement
Current

Acquisition of
Measured Value

End of Measurement
Signal
EOM

4.2 Setting Pre-Measurement Delay

4.2 Setting Pre-Measurement Delay

This setting specifies the delay between trigger signal input and the start of measurement.
Adjust this setting to delay measurement until the measured value has time to st abilize, so that even
if the sample is connected after triggering, measurement starts only after the specified delay. The
delay can be set by two methods, as follows.

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43

The Basic Settings screen appears.

The Measurement Settings Screen
appears.
[MEAS SETTINGS]

1

2

Selection

1

2

Setting range: 0.0 ms (default) to 100.0 ms

DELAY1 is common to all ranges, while
DELAY2 can be set for each range inde­pendently (p. 41).

Tenkeys

3

Selection

The confirmation screen appears.

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

4.2 Setting Pre-Measurement Delay

Determining the Delay Time

Set the delay so that inductance does not affect measurements.
To fine tune the delay, begin with a longer delay than necessary, then gradually shorten it while watching the

measured value.

Open the Basic Settings screen.

1

Open the Measurement Settings Screen.

2

Set DELAY1 or DELAY2.

3

Return to the Measurement screen.

4

4

When using the internal trigger, the delay time (DELAY1) is obtained by adding 100 ms to the setting (to pre­vent heat generation).

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44

The Basic Settings screen appears.

The Measurement Settings Screen
appears.
[MEAS SETTINGS]

1

2

Selection

Selection

1

2

Disables the function (default)
(go to step 6)

Enables the function

The setting is specific to the selected range
(p. 41)

1

2

Setting range: 0.50000 to 2.00000 (default: 1.00000)

Tenkeys

3

Selection

4.3 Correcting Measured Values (Scaling Function)

4.3 Correcting Measured Values
(Scaling Function)

When measuring the resistance of current sensing resistors, there may be a discrepancy between
the resistance value at the time of mounting on the board being used and the resistance value
obtained when measuring the component alone (due to the ef fects of the probing location and other
factors). The scaling function corrects the resistance measured value obtained from the component
alone to yield the resistance value during actual use. Scaling is performed by me ans of the following
equations:

Rs = A × R + B

R : Measured value before compensation
Rs: Resistance value after compensation
A : Compensation coefficient Setting range: 0.50000 to 2.00000 (default: 1.00000)
B : Offset resistance value Setting range: ±10% of full scale for each range

(default: 0 m)

See: "Appendix 4 Effects of Probing" (p. A9)

Open the Basic Settings screen.

1

Open the Measurement Settings Screen.

2

Enable the scaling function.

3

Set the compensation coefficient.

4

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Set the offset.

1

2

Setting range: ±10% of full scale for each range (default: 0 m)

Tenkeys

3

Selection

The confirmation screen appears.

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

5

Return to the Measurement screen.

6

45

4.3 Correcting Measured Values (Scaling Function)

4

• Scaling calculation is performed on measured values after zero-adjustment calculation. Consequently,
measured values may not equal zero even after zero adjustment.

• For the purpose of setting the offset resistance value, range full-scale signifies 1,200,000 dgt.

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46

The Basic Settings screen appears.

The Measurement Settings Screen
appears.
[MEAS SETTINGS]
(The settings for the current mea­surement range are displayed.)

1

Selection

2

1

Selection

Set in units of time
Set in units of power line cycles

2

The setting is specific to the selected range
(p. 41)

4.4 Setting the Measurement Integration Time Option

4.4 Setting the Measurement Integration Time
Option

The integration time can be optionally set for each range by selecting FAST, MED, or SLOW mea­surement speed. Integration time can be set in ms or PLC* units.

* PLC = Power Line Cycle, where one PLC is the period of the power line waveform. At 50 Hz, one PLC = 1/50th of a sec-

ond, and at 60 Hz, one PLC = 1/60th of a second.
PLC setting units are useful where measurements may be affected by power line noise (high- or low-resistance measure­ments)

Default Settings

Range

10m
100m (1A)
100m (100A)
1000m 0.3 ms 2.5 ms 1PLC
10 0.3 ms 2.5 ms 1PLC
100 0.3 ms 1.5 ms 1PLC ON
1000 0.3 ms 1.5 ms 1PLC ON

*1. Two measurements are made within the above integration times.

Open the Basic Settings screen.

1

Open the Measurement Settings Screen.

2

Integration Time [INT]

FAST MED SLOW

2.0 ms 5.0 ms 1PLC ON

1.0 ms 5.0 ms 1PLC ON

0.5 ms 5.0 ms 1PLC ON

OVC

ON
ON

*1
*1
*1
*1
*1
*1
*1

Select the integration setting units.

3

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Select the integration time.

Selection

1

Setting range:

• When setting in ms units: 0.1ms to 100.0ms

• When setting power-line-cycle units: 1 to 6PLC (60 Hz),

1 to 5PLC (50 Hz)

2
3

The confirmation screen appears.

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

4

Return to the Measurement screen.

5

47

4.4 Setting the Measurement Integration Time Option

4

• The instruments accuracy specifications are applicable only with the default integration
times. Investigate your measurement requirements carefully before changing the integra­tion time.

• When the ef fects of power line noise can be ignored, the integration time can be set longer
than the default to reduce scattering of measured values. On the other hand, if the inte gr a­tion time is too short, scattering increases.

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48

The Basic Settings screen appears.

The Measurement Settings Screen
appears.
[MEAS SETTINGS]

1

2

Selection

1

Selection

2

The setting is specific to the selected range
(p. 41)

Disables the function (default)
(go to step 5)

Enables the function

1

2

Setting range: 2 to 32 times (default: 16 times)

Tenkeys

3

Selection

The confirmation screen appears.

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

4.5 Stabilizing Measured Values (Averaging Function)

4.5 Stabilizing Measured Values
(Averaging Function)

The averaging function averages multiple measured values to stabilize them. Accuracy specifica-

*1

tions have been determined for the 16-iteration averaging setting in the 10 m range
more precise measurement to be performed.

For internal trigger measurement, a moving average is calculated. For external trigger measurement (and

:READ? command operation), a simple average is used.

Default setting Averaging function: OFF

Number of averaging iterations: 16Times

Open the Basic Settings screen.

1

, allowing

Open the Measurement Settings Screen.

2

Enable the averaging function.

3

Set the number of averaging iterations.

4

Return to the Measurement screen.

5

*1. SPEED = SLOW setting only.

Turning on the averaging function lengthens the external trigger measurement (and :READ? command oper­ation) time to (number of averaging iterations measurement time with averaging turned off). Since a moving
average is used for internal trigger measurement, the measurement time does not change.

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49

The Basic Settings screen appears.

The Measurement Settings Screen
appears.
[MEAS SETTINGS]

1

Selection

2

Selection

1

2

Disables the function (go to step 5)
Enables the function (default)

The setting is specific to the selected range
(p. 41)

Selection

1

2

50, 100 (default), 150, 200, 300,
400, 500
A contact fault occurs when a measured
value exceeds the threshold setting.

The confirmation screen appears.

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

4.6 Checking for Poor or Improper Contact (Contact Check Function)

4.6 Checking for Poor or Improper Contact
(Contact Check Function)

This function detects poor contact between the probes and DUT, and broken measurement cables.
The instrument continually monitors the resistance between the H

and L

L

CUR

When the resistance is outside of the specified value, a contact check fault occurs and the C.E. Hi
or C.E. Lo error message appears. No comparator decision is applied to the measured value . When
these error messages appear, check the probe contacts, and check for broken measurement
cables. If the error is not cleared by shorting the tips of a known-good measurement cable, the
instrument requires repair.

• During low-resist ance measure ment, poor co ntact of the H
range measurement.

• When contact checking is disabled, measured values may be displayed even when a probe is not contact­ing the DUT.

probes from the start of integration (including response time) and while measuring.

POT

or L

CUR

CUR

and H

CUR

probe may be detected as an out-of-

probes and the

POT

4

Open the Basic Settings screen.

1

Open the Measurement Settings Screen.

2

Enable the Contact Check function.

3

Select the contact check fault threshold resistance.

4

Return to the Measurement screen.

5

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50

OFF setting

ON setting

PULSE setting

* Internal delay is different for

each range.

Measurement

Measuring

Start

TRIG

Internal
delay *

Internal
delay *

Internal

delay *

Approx.

100

s

Measuring

Measuring

Start

TRIG

Start

TRIG

Measurement

Measurement

Contact Improver current: Off

Contact Improver current: On

Contact Improver current: Pulse

Probe Contact

Condition

Probe Contact

Condition

Probe Contact

Condition

Stable Contact

Stable Contact

Stable Contact

Timing Chart
(Contact Improver Function)

DELAY 2

DELAY 1

DELAY 2

DELAY 1

DELAY 2DELAY 1

4.7 Improving Probe Contact (Contact Improver Function)

4.7 Improving Probe Contact (Contact Improver
Function)

Probe contacts can be improved by applying current from the POT to the CUR probes before mea­suring.

The Contact Improver function applies voltage to the sample. Be careful when measuring
samples with characteristics that may be affected.

The current used for the Contact Improver functions can be selected as follows.
17 mA, 25 mA, 35 mA (default), 50 mA
Higher current provides more effective contact improvement, but at the cost of faster probe deterioration.
Contact Improver current can be set to be disabled (OFF), enabled (ON), or PULSE.
The PULSE setting applies the contact improvement current for about 100 µs immediately before measure­ment. The PULSE setting is useful to decrease Joule heating if the DUT is susceptible to its current.

DUT current Steady-state current: 2 mA max. *
DUT voltage 15 V max.

*:It takes several microseconds for the DUT current to reach the steady-state value. Until the steady-state

value is reached, a transient current that is approximately equal to the contact improvement current setting
(default setting: 35 mA) will flow.

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4.7 Improving Probe Contact (Contact Improver Function)

The Basic Settings screen appears.

The Measurement Settings Screen
appears.
[MEAS SETTINGS]

1

Selection

2

Selection

2

Disable probe contact improvement
(go to step 4).

Enable probe contact improvement.
Apply contact improvement current for

about 100

µs immediately before mea-

surement.

1

The setting is specific to the selected range(p. 41)

Selection

1

2

17mA, 25mA, 35mA (default), 50mA

The confirmation screen appears.

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

Open the Basic Settings screen.

1

Open the Measurement Settings Screen.

2

Set the Contact Improver current timing to disabled (OFF), enabled (ON), or PULSE.

3

51

4

(When selecting ON or PULSE)
Set the current limit value.

Return to the Measurement screen.

4

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52

The Basic Settings screen appears.

The Measurement Settings Screen
appears.
[MEAS SETTINGS]

1

Selection

2

Selection

1

2

Disables the function (go to step 5)
Enables the function (default)

The setting is specific to the selected range (p. 41)

Selection

1

2

Loose
Normal (default)
Severe

The confirmation screen appears.

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

4.8 Detecting Measurement Voltage Faults (Voltage Level Monitor Function)

4.8 Detecting Measurement Voltage Faults
(Voltage Level Monitor Function)

When a measurement voltage fault occurs due to probe chattering, the C.E. Volt error message
appears on the measurement screen and an
The C.E. Volt error may also appear when external noise is strong.

Check the following if errors occur frequently:

• Check for probe deterioration.

• Provide additional noise suppression. "Appendix 3 Unstable Measurement Values" (p. A3)

• Set the voltage level monitor to Loose, or OFF (disable).

• Keep wiring away from nearby equipment.

Open the Basic Settings screen.

1

ERR signal is output.

Open the Measurement Settings Screen.

2

Enable or disable the function.

3

(When enabled (ON selected))

4

Select the voltage level monitor threshold.

Return to the Measurement screen.

5

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53

The Basic Settings screen appears.

The Measurement Settings Screen
appears.
[MEAS SETTINGS]

1

Selection

2

Selection

1

2

Measurement current is applied while
awaiting trigger.

Measurement current is applied only
while measuring (default).

The setting is specific to the selected range (p. 41)

The confirmation screen appears.

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

4.9 Applying Current Only When Measuring (Current Mode Setting)

4.9 Applying Current Only When Measuring
(Current Mode Setting)

When the Contact Improver function is set to Pulse or disabled (CONT IMP: PULSE or OFF) and
measurement current is set for pulse output, open-circuit voltage when not measuring does not
exceed 20 mV.

See: "4.7 Improving Probe Contact (Contact Improver Fu nction)" (p. 50)

When the Contact Improver fu nctio n is enab led (CONT IMP: PULSE or ON setting), the current mode setting
is ignored even if set to continuous (CURRENT MODE: CONT setting). The Contact Improver function forces
pulse operation with measurement current applied only during measurement.

Open the Basic Settings screen.

1

4

Open the Measurement Settings Screen.

2

Select whether to apply current when not measuring.

3

To apply measurement current continuously (CONT setting) even when waiting for a trigger, confirm that
the Contact Improver function is disabled (CONT IMP: OFF, (p. 50)).

Return to the Measurement screen.

4

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Foreign Object

POT

CUR

DUT Electrode

DUT

Timin g Chart
(Probe Short-Circuit Detection)

Probe short-circuit

PRB_SHORT

Comparator

Hi, IN, Lo

End of Measurement

EOM

Measurement

Start

TRIG

Contact

Transport

Measurement
stage

Available

Short-Circuit
Detection

Transport

DUT1 contact

DUT2 contactTransport

Probe short-circuit

DUT1

measurement

DUT2

measurement

Short-Circuit

No Decision

Detection timing setting

4.10 Test for Short-Circuited Probe (Probe Short-Circuit Detection Function)

4.10 Test for Short-Circuited Probe
(Probe Short-Circuit Detection Function)

Four-terminal measurements are not possible when a conductive for­eign object is present between the POT and CUR probe tips. To
detect short-circuited probes, this function measures the resistance
between the CUR and POT terminals after a specific time (initially 5
ms) following the end of measurement. Probe short-circuit detection
is disabled by default.

When a probe short-circuit is detected, an error message appears on
the measurement screen, and the
output. (

Short-circuit detection can also be controlled by asserting the active-low PRB_CHECK EXT I/O signal.
Asserting the PRB_CHECK
end of measurement (p. 89).

ERR:021 Probe short error)

signal while measuring causes short-circuit detection to be performed after the

PRB_SHORT and ERR signals are

About Probe Short-Circuit Detection

• If probes are connected to the DUT during probe short-circuit detectio n, the short circuit is detected. Ensure
that the probes have sufficient time to separate from the measurement object.

• Probe short-circuit detection occurs within about 1 ms.

• The threshold for probe short-circuit detection is fixed at 500 , so if the resistance b etween CUR and POT
probes is larger, detection is not possible.

•

Even while the probe short-circuit detection function is set to be disabled, short-circuit detection is performed when the
EXT I/O PRB_CHECK signal is asserted.

• When the internal trigger [TRG: INT] source is selected, short-circuit detection is not performed after the end of mea-

• If probe short-circuit detection coincides with the timing of self-calibration processing, short-circuit detection will not be

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surement. However, short-circuit detection can still be executed by asserting the PRB_CHECK signal.
performed. Short-circuit detection using the PRB_CHECK

completes.

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signal will be performed after self-calibration processing

4.10 Test for Short-Circuited Probe (Probe Short-Circuit Detection Function)

The Basic Settings screen appears.

The System screen appears.
[SYSTEM]

1

Selection

2

Selection

1

2

Disables the function (default)
(go to step 5)

Enables the function

Selection

1

2

Setting range: 1 to 100 ms, 5 ms (default)

Short-circuit detection is delayed for the speci­fied time following the end of measurement.

3

The confirmation screen appears.

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

Probe Short-Circuit Detection Enable/Disable

Open the Basic Settings screen.

1

Open the System screen.

2

Enable or disable the function.

3

55

4

(When enabled (ON selected))

4

Set the probe detection timing.

Return to the Measurement screen.

5

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1st Stage

2nd Stage

Transport Direction

ABCDE

Automatic
Comparison

The SET MONITOR connectors are identical
to RS-232C connectors. Be careful to avoid
connecting the wrong connectors.

The Basic Settings screen appears.

The System screen appears.
[SYSTEM]

1

Selection

2

Selection

1

2

Disables the function (default)
Enables the function

4.11 Comparing the Measurement Settings of Two Instruments (Settings Monitor Function)

4.11 Comparing the Measurement Settings of
Two Instruments
(Settings Monitor Function)

This function automatically compares the settings of two
instruments to determine whether they are the same.
Only those measurement settings affecting the compar­ator and speed are compared. When the settings differ,
an alarm notification appears and subsequent
nal input is prevented from starting measurement.

When the settings of two instruments match, TRIG input is
accepted and measurement starts. However, if the range
defined by the upper and lower thresholds of the second
stage is broader than that of the first stage, measurement still
starts despite the different threshold settings.

TRIG sig-

Connect the two instruments’ SET MONITOR connectors together using a Hioki 9637

1

RS-232C cable.

Open the Basic Settings screen.

2

Open the System screen.

3

Enable the function on both instruments.

4

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Selection

1

2

Selects this instrument as the 1st stage
Selects this instrument as the 2nd stage

3

Enter the difference in tolerance (%) to be allowed at the 2nd stage from the tol­erance range set for the 1st stage.
Setting range: 0.000 to 9.999%

4

Example: If the 1st stage is set to measure
12

 ±0.800%, and the 2nd is to measure

12

 ±1.000%, enter the difference in toler-

ance of 0.300%.

Selection

1

2

Selects this instrument as the 1st stage
Selects this instrument as the 2nd stage

The confirmation screen appears.

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

1st stage

2nd stage

UPP [%]

REF% setting ABS setting

REF [

]

LOW [%]

Tolerance
range [%]

UPP []

LOW [

]

2nd upper limit - 1st upper limit

1st upper limit

Tolerance range [%] > 2nd upper limit [%] - 1st upper limit [%]

Tolerance
range[%]

1st lower limit - 2nd lower limit

1st lower limit

(upper limit)

(

lower limit)

Permissible tolerance is calculated using floating-point values, so the setting must be at least 0.001% la rger
than the difference between 2

nd

and 1st stage ranges. Set the upper and lower comparator thresholds ac­cording to the following conditions:
1

st

stage upper threshold < 2nd stage upper threshold

1

st

stage lower threshold > 2nd stage lower threshold

(upper limit)

(

lower limit)

1st stage

2nd stage

Tolerance
range [%]

>

Tolerance
range[%]

>

x 100

x 100

4.11 Comparing the Measurement Settings of Two Instruments (Settings Monitor Function)

Select the instrument to serve as the 1st stage, and set its tolerance range.

5

Set the instrument to serve as the 2nd stage (another RM3543).

6

4

Return to the Measurement screen.

7

Tolerance Range Setting Conditions

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58

1st Stage

TRIG Input Accepted

TRIG Input Inhibited

TRIG

Input Accepted

When changing the reference value

Change the reference value to match
the 1

st

stage

The error message appears when the
settings do not match.

2nd Stage

1st Stage

2nd Stage

1st Stage

2nd Stage

SET MONITOR: ON 1st 0.300%

(on the System screen)

SET MONITOR: ON 2nd

(on the System screen)

When an error is displayed

ERR:003
Setting monitor error. (COMP)

Comparator settings do not match. Please check.

ERR:004
Setting monitor error. (SPEED)

Measurement speed settings do not match. Please check.

4.11 Comparing the Measurement Settings of Two Instruments (Settings Monitor Function)

Practical Example

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4.12 Retrying Measurement After a Fault (Retry Function)

Retry

Chatter

Probe Contact
Condition

Start
TRIG

Contact
Improver

Measurement
Current

Contact Check

End of Measurement
EOM

The Basic Settings screen appears.

The System screen appears.
[SYSTEM]

1

Selection

2

Selection

1

2

Retry disabled (go to step 5)
Retry enabled (default)

Selection

1

2

Setting range: 1 to 50 ms (default: 50 ms)

3

The confirmation screen appears.

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

4.12 Retrying Measurement After a Fault
(Retry Function)

The Retry function causes measurement to be
automatically retried when a measurement fault
occurs due to probe chatter.

During Retry, all measurement operations including Con­tact Improvement and DELAY2 (but excluding DELAY1)
are restarted.
If a measurement fault persists after the specified contin­uous retry interval (e.g., if the DUT is not connected),
retrying is aborted and the
Retry is enabled, the maximum time to end-of-measure­ment occurs when recovering from a measurement fault
immediately before the retry interval expires, which
approaches the sum of the retry interval setting plus nor­mal measurement time. Decreasing test throughput may
indicate probe maintenance is required.

EOM signal is output. When

59

4

Open the Basic Settings screen.

1

Open the System screen.

2

Select whether to enable or disable Retry.

3

(When enabled (ON selected))

4

Set the continuous retry interval.

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Return to the Measurement screen.

5

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60

Configure automatically.

Execute automatically.

(default)

Configure manually.

Execute at user-selected timing.

Internal self-calibration is performed automatically once
every 10 minutes.

Self-calibration is performed at the user's desired timing us­ing the external control CAL input signal or a communica­tions command. Using this setting prevents self-calibration
from being performed automatically at unexpected times.

The Basic Settings screen appears.

The System screen appears.
[SYSTEM]

1

Selection

2

Selection

1

2

Configure automatically. (default)
Configure manually.

The confirmation screen appears.

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

4.13 Maintaining Measurement Precision (Self-Calibration)

4.13 Maintaining Measurement Precision
(Self-Calibration)

To maintain measurement precision, the instrument self-calibrates to compensate for internal circuit
offset voltage and gain drift. This function cannot be disabled.
You can select between two self-calibration function execution methods.

During self-calibration, the subsequent measurement is delayed for about 6PLC + 10 ms (PLC = Power Line
Cycles) for internal circuit compensation.

Self-Calibration Timing
Within 130 ms at 50 Hz, or 110 ms at 60 Hz

Open the Basic Settings screen.

1

Open the System screen.

2

Configure self-calibration operation.

3

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Return to the Measurement screen.

4

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61

RpRN–

2

----------------------

4.14 Compensating for Thermal EMF Offset (Offset Voltage Compensation - OVC)

• When the timing of self-calibration overlaps with a measurement, self-calibration is postponed until the end
of measurement.

• When a trigger signal is applied during self-calibr ation, th e start of the triggered measurement is postponed
until self-calibration is finished.

• Self-calibration executes automatically after changing comparator or measurement speed settings.

• During self-calibration, measureme nt curr en t an d th e Con tact Impr ov er curr e nt ar e inh ib ite d.

• When configuring manually, be sure to perform self-calibration if the temperature of the environment in
which the instrument is operating changes by 2 degrees or more. (Accuracy cannot be guaranteed if self­calibration is not performed.)

4.14 Compensating for Thermal EMF Offset
(Offset Voltage Compensation - OVC)

This function automatically compensates for offset voltage resulting from thermal emf or internal
instrument bias. (OVC: Offset Voltage Compensation)

See: "Appendix 2 Effect of Thermal emf" (p. A2)

The following value is known to be a true resistance value from RP (>0), the value measured with
current flowing in the positive direction, and R
negative direction.

Offset voltage compensation is automatically enabled for all ranges, and cannot be modified or dis­abled.

Depending on the test object, some delay (DELAY2) is required (p. 42) to allow adequate current flow before
starting measurement.

(<0), the value measured with current flowing in the

N

4

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5.1 Disabling and Enabling Key Operations

Key operations other than comparator settings (REF%, ABS, units and tenkeys)
and F1 [UNLOCK] keys are disabled.
To disable key operations: select [MENU]
[M.LOCK] is displayed when returning to the measurement screen.

Disabling All Except Comparator Settings

Only comparator
settings are enabled.

All key operations except F1 [UNLOCK] are disabled.
To disable key operations: select [FULL]
[F.LOCK] is displayed when returning to the measurement screen.

Disabling All Key Operations Including Comparator
Settings

Key operations to
change settings are
disabled (although key­lock can be canceled).

Asserting (Low) the EXT I/O KEY_LOCK signal disables all panel keys, including
F1 [UNLOCK] and F1 [LOCAL] (disables remote control) (p. 89).
To disable the key-lock function and re-enable the keys, de-assert (High) the
KEY_LOCK

signal.

Disabling All Panel Keys

All key operations are
disabled.

The Basic Settings screen appears.

1

Selection

2

Key operations enabled (default)
Disable all except key-lock cancel
Disable all except key-lock cancel and

comparator setting change

[UNLOCK] is displayed only
when key-lock is enabled by
front panel key operations.

System Settings Chapter 5

5.1 Disabling and Enabling Key Operations

Disabling Key Operations (Key-Lock Function)

Activate the key-lock function to disable the instrument’s front panel key operations.
Three key-lock levels are available to suit specific purposes.

63

5

Open the Basic Settings screen.

1

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Enable or disable key operations.

2

Return to the Measurement screen.

3

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64

5.1 Disabling and Enabling Key Operations

Re-Enabling Key Operations (Key-Lock Cancel)

Key-lock can be canceled only when [UNLOCK] is displayed.

Press and hold F1 [UNLOCK] for one second.

If key operations are disabled by the KEY_LOCK
keys.

signal, de-assert (High) the signal to unlock the

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5.2 Setting the Comparator Decision and Key Beepers

The Basic Settings screen appears.

The System screen appears.
[SYSTEM]

1

Selection

2

Selection

1

2

Disables the beeper
Enables the beeper (default)

The confirmation screen appears.

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

5.2 Setting the Comparator Decision and Key
Beepers

Enabling or Disabling the Key Beeper

The key beeper sound can be enabled and disabled.
The key beeper is enabled (ON) by default.

Open the Basic Settings screen.

1

65

5

Open the System screen.

2

Select whether to enable or disable the key beeper.

3

Return to the Measurement screen.

4

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The Basic Settings screen appears.

The System screen appears.
[SYSTEM]

1

Selection

2

Selection

1

2

Disables the beeper (default)
Enables the beeper

Selection

1

2

IN (beep when within range)
HI/LO (beep when out of range)
LOW (beep when below lower threshold)
HIGH (beep when above upper threshold)

The confirmation screen appears.

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

5.2 Setting the Comparator Decision and Key Beepers

Setting the Comparator Decision (“JUDGE”) Beeper

The comparator decision beeper can be enabled and disabled.
The decision beeper is disabled (OFF) by default.

Open the Basic Settings screen.

1

Open the System screen.

2

Select whether to enable or disable the decision beeper.

3

(When enabled (ON selected))

4

Select the decision beep conditions.

Return to the Measurement screen.

5

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67

The Basic Settings screen appears.

The System screen appears.
[SYSTEM]

1

Selection

2

Selection

1

2

Automatically detect local line frequency
(default)

When the line frequency is 50 Hz
When the line frequency is 60 Hz

The confirmation screen appears.

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

5.3 Power Line Frequency Manual Setting

5.3 Power Line Frequency Manual Setting

For proper electrical noise suppression, the instrument needs to be set to match the power line fre­quency. With the default setting (AUTO), the instrument attempts to automatically detect the line fre­quency, but manual setting is also available.
Unless the line frequency is set correctly, measured values may be unstable.
An error message appears if line noise is high enough to prevent correct frequency detection
(ERR:041(p. 185)). In that case, set the instrument’s line frequency manually.

When the AUTO setting is selected, the line frequency is automatically set to 50 or 60 Hz when the instrument
is turned on or reset.

However, automatic detection is not available when the line frequency changes after turning power on or
resetting.

If the actual line frequency deviates from 50 or 60 Hz, select the closest frequency.

Examples:
If the actual line frequency is 50.8 Hz, select the 50 Hz setting.
If the actual line frequency is 59.3 Hz, select the 60 Hz setting.

Open the Basic Settings screen.

1

Open the System screen.

2

Select the line frequency being used.

3

5

Return to the Measurement screen.

4

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The Basic Settings screen appears.

The System screen appears.
[SYSTEM]

1

Selection

2

Selection

1

2

Enter the last two digits of the year, and the month, day, hour, minutes and
seconds in that order (the cursor moves automatically).
Enter two digits for all values (e.g., 09).

Clock settings cannot be canceled.

5.4 Setting the Clock

5.4 Setting the Clock

To record and print the correct time when using statistical calculations (p. 78), the clock needs to be
set correctly. The time of printing is also output when printing statistical calculation results.

Open the Basic Settings screen.

1

Open the System screen.

2

Set the date and time.

3

Return to the Measurement screen.

4

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The Basic Settings screen appears.

The System screen appears.
[SYSTEM]

1

Selection

2

Selection

1

2

0 to 100%, 5% step
(default: 50%)

The confirmation screen appears.

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

5.5 Adjusting Screen Contrast

5.5 Adjusting Screen Contrast

The screen may become hard to see when ambient temperature changes. In this case, adjust the
contrast.

Open the Basic Settings screen.

1

Open the System screen.

2

5

Adjust the contrast.

3

Return to the Measurement screen.

4

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The Basic Settings screen appears.

The System screen appears.
[SYSTEM]

1

Selection

2

Selection

1

2

0 to 100%, 5% step, (default: 80%)

The confirmation screen appears.

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

5.6 Adjusting the Backlight

5.6 Adjusting the Backlight

Adjust backlight brightness to suit ambient illumination.

• When external (EXT) triggering is selected, backlight brightness is automatically reduced after non-opera­tion for one minute.

• Be aware that the display may be hard to see when brightness is set too low (near 0%).

Open the Basic Settings screen.

1

Open the System screen.

2

Adjust the backlight.

3

Return to the Measurement screen.

4

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The Basic Settings screen appears.

The System screen appears.
[SYSTEM]

1

Selection

2

Selection

1

2

Returns all settings to their factory
defaults

Cancel the operation

Execute

5.7 Initializing (Reset)

5.7 Initializing (Reset)

The instrument can be reset by three methods.

• System reset from the System screen: Returns all settings (except the clock) to factory defaults.

• Turn the instrument on while simultaneously holding the REF% and ABS keys: Returns all settings (except
the clock) to factory defaults.

• Reset by remote control command: returns all settings (except communication and clock settings) to their
factory defaults.



RST command (non-backup, (p. 127))

:SYSTem:RESet command (p. 141)

This procedure describes system reset from the System screen.

Open the Basic Settings screen.

1

5

Open the System screen.

2

Select RESET.

3

Select whether to cancel or proceed to execute system reset.

4

The Measurement screen is displayed when system reset finishes.

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5.7 Initializing (Reset)

Default Settings

Display Setting value Default Settings Setting Description

TRG
RANGE
SPEED

MENU

0ADJ
COMP
LOCK
MISC

MISC

DELAY1
DELAY2

SCALING

INT (FAST)
INT (MED)
INT (SLOW)

MEAS

AVERAGE

CONT CHECK

CONT IMP
VOLT

MONITOR
CURRENT

MODE
AUTO MEMO-

RY

DATA

STATISTICS
DATA OUT
SET MONITOR
PROBE

CHECK
RETRY
TRIG EDGE

EOM
INTERFACE

SYS­TEM

100m CURR
CALIBRATION
JUDGE BEEP

KEY BEEP
CLOCK
LINE FREQ
CONTRAST
BACK LIGHT
RESET
ADJUST

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INT/ EXT/ MANU EXT Trigger source selection (p. 30)
10m/ 100m/ 1000m/ 10/

100/ 1000
SLOW/ MED/ FAST FAST Measurement speed (p. 29)
OFF/ ON OFF Zero adjustment (p. 32)
OFF/ ON ON Comparator function(p. 34)
OFF/ FULL / MENU OFF Key-Lock function (p. 63)
MEAS/ DATA/ SYSTEM (Miscellaneous settings)

0 to 100 ms (all ranges) 0 ms Probe delay setting (p. 42)
0 to 100 ms 0 ms DUT response setting (p. 42)
OFF/ ON

Coefficient A
Offset B

0.1 ms to 100 ms
1PLC to 6PLC (60 Hz)
1PLC to 5PLC (50 Hz)

OFF/ ON
2 to 32 times

OFF/ ON
50 / 100 / 150 / 200 / 300

/ 400 / 500 
OFF/ ON/ PULSE

17 mA/ 25 mA/ 35 mA/ 50 mA
OFF/ ON
LOOSE/ NORMAL/ SEVERE

CONT/ PULSE PULSE Current mode setting (p. 53)

OFF/ ON OFF Auto-Memory function (p. 75)

OFF/ ON OFF
OFF/ ON OFF Data output function (p. 81)

OFF/ ON,
1st/ 2nd, 0.000% to 9.999%

OFF/ ON, 0 to 100 ms OFF, 5 ms Probe short-circuit detection (p. 54)
OFF/ ON, 1 to 50 ms ON, 50 ms Retry function (p. 59)

OFF EDGE/ ON EDGE ON EDGE Start Logic Setting (p. 98)
PULSE/ HOLD

1 to 100 ms
GP-IB/ RS232C/ PRINT

100mA/ 1A 100mA

AUTO/ MANU AUTO
OFF/ ON

IN/ HI/LO/ LOW/ HIGH
OFF/ ON ON Key beeper (p. 63)

AUTO/ 50 Hz/ 60 Hz AUTO Line frequency (detection) (p. 67)
0 to 100 50 Screen contrast adjustment (p. 69)
0 to 100 80 Screen backlight adjustment (p. 70)

- - Reset (p. 71)

- - Calibration (p. A16)

1000  Range selection (p. 31)

OFF
A: 1
B: 0

Depends on measurement range Integration time (p. 46)

OFF, 16Times Averaging function (p. 48)

ON, 100  Contact-check (p. 49)

ON, 35 mA Contact Improvement (p. 50)

ON, NORMAL Voltage level monitor (p. 52)

OFF, 1st, 0.000% Settings Monitor function (p. 56)

PULSE, 5 ms
RS232C, 9600bps

GP-IB, ADR01, LF

OFF, HI/LO Comparator decision beeper (p. 65)

Scaling function (p. 44)

Statistical calculation function
(p. 78)

End-of-measurement pulse width
(p. 97)

Interface setting (p. 105)
Switching 100 m range measure-

ment currents (p. 28)
Self-calibration operation settings

(p. 60)

Clock setting (p. 68)

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73

Store up to 30,000 measured values using the EXT I/O TRIG
signal or by pressing F4 [MANU] on the Basic Settings screen.

Data Memory Function (p. 74)

Store measured values at spe­cific times.

This is convenient for batch exporting
data to a controller while switching
reels.

Measured values are automatically stored as they become sta­ble.
When the specified number of data points (up to 99) is acquired,
the beeper sounds and auto-storing halts.

Auto-Memory Function (p. 75)

Store data after measured value
has stabilized.

This is convenient for sample inspec­tion after printing (vapor deposition)
resistors on a board.

Minimizes transfer time by eliminating the need for transmit re­quests from the remote controller. (RS-232C interface only)

Data Output Function (p. 81)

Automatically output (export)
measurements at the end of
measurement.

Stored measurements are lost when the instrument is turned off.

Therefore, be sure to print out or export important data to a PC.

Storing and

Exporting Data Chapter 6

Measured values can be stored or automatically exported, according to application. Stored data can
be output to a printer, RS-232C or GP-IB. Also, statistical calculations can be applied to internally
stored data.

The data memory and auto-memory functions cannot be enabled at the same time.

6

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74

6.1 Storing Data at Specific Times (Data Memory Function)

6.1 Storing Data at Specific Times
(Data Memory Function)

Measured values are stored in the instrument’s internal memory according to the following timings.
(up to 30,000 points)

• Every time a measurement is performed by external (EXT) triggering

• When a trigger is applied during internally (INT) triggered measurement

The following three storage methods are available:

• Store upon receiving an EXT I/O TRIG

• Store upon receiving a 

• Store by pressing the F4 [MANU] key on the [MENU] – [TRG] setting screen.

• This function can only be enabled by remote control. The data memory function should be enabled by
remote control beforehand. This setting is not available from the front panel.

• Stored memory dat a cannot be viewed on the instrument’ s scr een. Use remote control commands to export
stored data.

TRG command (p. 130)

signal (p. 89)

Data Memory Function Operating Procedure

Enable data memory mode.

1

Send this remote command to enable the data memory function:

:MEMory:MODE MEMory (p. 146)

Store measured values.

2

Execute external trigger measurement, or apply a trigger during internally triggered measurement.

Export the stored data.

3

Send this remote command to export the measured values stored in the instrument:

:MEMory:DATA? (p. 147)

Clear measurement data from instrument memory.

4

Send this remote command to erase the data from instrument memory:

:MEMory:CLEar (p. 146)

Stored data is automatically erased at the following times:

• when the memory function setting (including auto-mem-

ory) is changed (p. 146)

• when the range is changed (p. 31)

• when changing comparator settings (p. 34)

• when the scaling setting for the current range is changed

(p. 44)

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• when printing the statistical calculations (p. 86)

• when the DUT is changed (p. 28)

• upon system reset (p. 71)

• when the instrument is turned off

75

Printing (p. 86)

Prepare the printer (p. 83).
Enable Auto-Memory and set

the number of values to store.

Set decision criteria
(p. 34).

Measure

Beeper notifies when the specified number of values is stored.

6.2 Store as soon as Measurement is Stable (Auto-Memory Function)

6.2 Store as soon as Measurement is Stable
(Auto-Memory Function)

This function automatically stores the value measured each time the probes cont act the sample with
internal triggering. When the specified number of values has been acquired, auto-storage operation
stops.
St atistical calculations are applied to the stored dat a, with result s output to the screen or printer (RS­232C).

See: "6.3 Performing Statistical Calculations on Measured Values" (p. 78)

"Chapter 7 Printing" (p. 83)

Data storage and printing can be automatically controlled by the Auto-Memory function.

The Auto-Memory function is disabled by default.
Enable the Auto-Memory function before settin g the nu m ber of valu es to stor e.

Enabling the Auto-Memory function affects other functions as follows:

• Statistical calculation is forced on.

• The voltage level monitor function is forced off (although the setting itself is not set to OFF, the function is
actually disabled).

• The trigger source setting is forced to internal (INT).

When the trigger source is set to external (EXT), the Auto-Memory function is disabled by force.

Deleting Stored Data

Stored data is automatically erased at the following times:

• when the memory function setting (including auto-mem-

ory) is changed (p. 146)

• when the range is changed (p. 31)

• when changing comparator settings (p. 34)

• when the instrument is turned off

• when the scaling setting for the current range is changed

(p. 44)

• when printing the statistical calculations (p. 86)

• when the DUT is changed (p. 28)

• upon system reset (p. 71)

• upon setting the auto-memory number of values to store

(p. 77)

• when the instrument is turned off

6

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76

The Basic Settings screen appears.

The Data Settings screen appears.
[DATA SETTINGS]

1

Selection

2

Selection

1

2

Disable the function (default)
Enable the function

The confirmation screen appears.

When the function is enabled

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

6.2 Store as soon as Measurement is Stable (Auto-Memory Function)

Enabling the Auto-Memory Function

Open the Basic Settings screen.

1

Open the Data Memory Settings screen.

2

Enable the function.

3

Return to the Measurement screen.

4

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6.2 Store as soon as Measurement is Stable (Auto-Memory Function)

Displays the Auto-Memory setting
screen

Total Count Pass Count (IN) Fail Count (Hi/Lo)

Setting range: 1 to 99

To Reset Numerical Values

Deletes entered digits.
This key is enabled only when enter­ing numerical values.

(Example: 20 values set to be stored)

Setting the Number of Values to Store

Open the Auto-Memory Settings screen.

1

Enter the number of values to store.

2

77

To abort the setting process, press . Settings are abandoned and the display returns to the pre­vious screen.

Accept the settings and return to the Measurement screen.

3

Acquiring Measured Values Automatically

Momentarily disconnect (open-circuit) the probes.

1

Connect the probes to the DUT.

2

6

When the measurement is stable, the value is automatically stored and the count is incremented.
When the count reaches the specified number of values, a long beep sounds, and subsequent mea­surements are not stored.
The (one) last acquired value can be deleted (Undo function (p. 80)).

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78

n

x

x







n

x2nx2–



n

---------------------------- -

=



n1–

x2nx2–



n1–

---------------------------- -

=

16





n

LoHi

Cp



1

6

2







n

xLoHiLoHi

CpK



6.3 Performing Statistical Calculations on Measured Values

6.3 Performing Statistical Calculations on
Measured Values

Statistical calculations can be performed on up to 30,000 measured values, with results displayed.
Printing is also available (p. 86).

Calculation types: average, maximum and minimum values, population standard deviation, sample
standard deviation, process compatibility indices

Maximum value
Minimum value

Average

Population standard
deviation

Standard deviation
of sample

Process capability
index (dispersion) *

Process capability
index (bias)*

• When only one valid data sample exists, standard deviation of sample and process capability indices are
not displayed.

• When 

• The upper limit of Cp and CpK is 99.99. If Cp or CpK exceeds 99.99, the value 99.99 is displayed

• Negative values of CpK are handled as CpK = 0.

• If statistical calculation is turned off and then ba ck on again without first clearing calculation results, calcula­tion resumes from the point when it was turned off.

• Measurement speed is restricted when statistical calculation is enabled.

• When Auto-Memory is enabled (ON), statistical calculation is enabled (ON) by force.

• When statistical calculation is disabled (OFF), Auto-Memory is disabled (OFF) by force.

= 0, Cp and CpK are 99.99.

n-1

Xmax = MAX (x1, ....., xn)

Xmin = MIN (x1, ....., xn)

In these formulas, n represents the number of valid
data samples.

Hi and Lo are the upper and lower thresholds of the
comparator.

*. The process capability indices represent the quality

achievement capability created by a process, which
is the breadth of the dispersion and bias of the pro­cess' quality. Generally, depending on the values of
Cp and CpK, process capability is evaluated as fol­lows:

Cp, CpK>1.33.........Process capability is ideal

Cp, CpK>1.00 Process capability is adequate

1.33

Cp, CpK.........Process capability is inade-

1.00
quate

Deleting Statistical Calculation Results

Stored data is automatically erased at the following times:

•

when the memory function setting (including data-mem­ory) is changed (p. 146)

• when the range is changed (p. 31)

• when changing comparator settings (p. 34)

• when the scaling setting for the current range is changed

(p. 44)

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• when printing the statistical calculations (p. 86)

• when the DUT is changed (p. 28)

• upon system reset (p. 71)

• upon setting the auto-memory number of values to store

(p. 77)

• when the instrument is turned off

79

The Basic Settings screen appears.

The Data Settings screen appears.
[DATA SETTINGS]

1

Selection

2

Selection

1

2

Disable statistical calculation (default)
Enable statistical calculation

The confirmation screen appears.

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

When statistical calculation is enabled, F3 [STAT] appears
on the Measurement screen.
Confirm calculation results (p. 80)

6.3 Performing Statistical Calculations on Measured Values

Using Statistical Calculations

When statistical calculation is enabled and an EXT I/O trigger signal is applied, operation is as fol­lows depending on the trigger source setting:

• With external (EXT) triggering: One measurement is performed and subjected to statistical calculation.

• With internal (INT) triggering: The next measured value after the trigger signal is subjected to st atistical cal­culation.

Operation is the same in the following cases:

(Key Operations) (Remote Control)

• when pressing the F4 [MANU] key on the [MENU] ­[TRG] selection screen

• when pressing the F2 [PRINT] key on the Measurement
screen (with internal triggering and Auto-Memory dis­abled. Appears only when the interface is set for the
printer.)

• when acquiring measured values by the Auto-Memory
function (p. 75)

• when a TRG remote contro l command is
received

• when an EXT I/O print signal is applied on
the Measurement screen (with internal
triggering and Auto-Memory disabled)

Open the Basic Settings screen.

1

Open the Data Memory Settings screen.

2

Enable or disable statistical calculation.

3

Return to the Measurement screen.

4

6

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80

Displays the Calculation Results
screen (if statistical calculation is en­abled).

Num

Total data count

Val

Number of valid measured values (error-free data)

Ave

Mean

Sn

Population standard deviation

Max

Maximum

Sn1

Standard deviation of sample

Min

Minimum

Cp

Process capability index (dispersion)

Cpk

Process capability index (bias)

Output to the printer.
"Example Printouts" (p. 87)

Statistical calculation results and stored data are erased when printing finishes.

Erases the last measurement and calcula­tion result (executes only once).

Erases all measured values and statistical
calculation results.

After selecting, a confirmation screen ap­pears.

6.3 Performing Statistical Calculations on Measured Values

Confirming, Printing, and Erasing Calculation Results

Statistical calculation results are displayed on the screen.
Printing is also available with the commercially available printer with a serial interface. Calculation
results are automatically erased after printing. Before printing, select the [PRINT] interface setting.

See: "7.2 Instrument Settings" (p. 85)

The number of valid samples can be confirmed on the Calculation Results screen.

• When the number of valid samples is zero, no calculation results are displayed.

• When only one valid data sample exists, no standard deviation or process capability indices are displayed.

Display the Calculation Results screen.

1

To print

2

To print, select the printer as the interface setting on the System screen (p. 85)

To erase

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81

The Basic Settings screen appears.

The Data Settings screen appears.
[DATA SETTINGS]

1

Selection

2

Selection

1

2

Disable auto-exporting (default)
Enable auto-exporting

The confirmation screen appears.

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

6.4 Auto-Exporting Measured Values (at End of Measurement) (Data Output Function)

6.4 Auto-Exporting Measured Values (at End of
Measurement) (Data Output Function)

At the end of measurement, the measured value is exported to a computer via RS-232C.

See: "Chapter 9 Commu nications (RS-232C/ GP-IB Interface)" (p. 101)

• Set the interface to [RS232C] beforehand. This function is not applicable to the GP-IB Interface.

See:"9.4 Configuring the Communications Protocol" (p. 105)

• When internal (INT) triggering is selected, data is exported only when a TRIG signal is applied.

• Executing a

• For other queries, be careful to avoid overlapping query response timing with auto-exp orting mea sured va l­ues.

• The data format for measured values can be selected as ASCII (default) or BINARY. Transfer time is mini­mized when BINARY is selected.

See:":SYSTem:FORMat <ASCii/ BINary>" (p. 141)

:READ? query command exports duplicate measured values.

Open the Basic Settings screen.

1

Open the Data Memory Settings screen.

2

Enable or disable auto-exporting (DATA OUT)

3

6

Return to the Measurement screen.

4

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7.1 Connecting the Printer

Printing (p. 86)

• Measurement values and
comparator decisions

• Statistical calculation
results

Connecting the printer to
the instrument

Make instrument
settings (p. 85)

Make printer
settings

Printing Chapter 7

7.1 Connecting the Printer

83

Before connecting the printer

Because electric shock and instrument damage hazards are present, always follow
the steps below when connecting the printer.

• Always turn off the instrument and the printer before connecting.

• A serious hazard can occur if a wire becomes dislocated and contacts another con-

ductor during operation. Make certain connec tions are secure.

• As much as possible, avoid printing in h ot and humid environ ments. O therwis e, prin ter life
may be severely shortened.

• Use only compa tible recording p ap er in the printer. Using non-specified paper may not only
result in faulty printing, but printing may become impossible.

• If the recording paper is skewed on the roller, paper jams may result.

Recommended printer

The requirements for a printer to be connected to the instrument are as follows.
Confirm compatibility and make the appropriate settings on the printer before connecting it to
the instrument.

See: "7.2 Instrument Settings" (p. 85)

7

• Interface ................................ RS-232C

• Characters per line................ At least 45

• Communication speed........... 9600 bps

• Data bits................................ 8

• Parity............ ... .... ... ... ... .... ..... none

• Stop bits................................. 1

• Flow control........................... none

• Control codes........................ Capable of directly printing plain text

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84

1 Confirm that the instrument and printer are

turned off.

2 Connect the AC adapter to the printer, and

insert the power plug into an outlet.

3 Connect the RS-232C cable to the RS-232C

connectors on the instrument and printer.

4 Turn the instrument and printer on.

2

3

Printer (Example)

AC adapter

RS-232C cable

25 ....................... 14

Printer (25-pin) Connector (Example)

RM3543 (9-pin) Connector

Pin

Signal
Name

Function

2 TxD

Transmit Data

3 RxD

Receive Data

7 GND

Signal or Common Ground

4 RTS

Request to Send

5 CTS

Clear to Send

Function

Signal
Name

Pin

Receive Data

RxD 2

Transmit Data

TxD 3

Signal or Common Ground

GND 5

6 7 8 9

1 2 3 4 5

Connector Pinouts

13 ....................... 1

7.1 Connecting the Printer

Connecting the Printer to the Instrument

Connection Methods

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7.2 Instrument Settings

The Basic Settings screen appears.

The System screen appears.
[SYSTEM]

1

Selection

2

Selection

2

1

To use the printer

The confirmation screen appears.

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

Open the Basic Settings screen.

1

Open the System screen.

2

85

7.2 Instrument Settings

Select PRINT as the interface type.

3

Return to the Measurement screen.

4

7

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86

(When statistical calculation is enabled)

7.3 Printing

7.3 Printing

Before Printing

Verify that the instrument and printer settings (p. 85) are correct.

Printing Measured Values and Comparator Decisions

Printing by key operation

Press the PRINT key to print the measured value currently displayed on the Measurement screen.

Printing by external control

Measured values and comparator decisions print when the (active-low) PRINT signal (EXT I/O connec­tor) is connected to ISO_GND.

* ISO_GND is a pin in the instrument’s EXT I/O connector.

*

When statistical calculation is enabled [STATISTIC: ON] and internal triggering [TRG: INT] is selected, statistical calcula­tions are performed and measured values are printed. When external (EXT) triggering is selected, o nly measured values
are printed. Use the TRIG

signal to perform statistical calculations with external triggering.

Printing Statistical Calculation Results

Statistical calculation results can be printed when auto-memory or statistical calculation is enabled
(ON). To print, select PRINT on the screen or connect the (active-low) PRINT
connector to ISO_GND.

To enable auto-memory:

See: "6.2 Store as soon as Measurement is Stable (Auto-Memory Function)" (p. 75)

To enable statistical calculation:

See: "6.3 Performing Statistical Calculations on Measured Values" (p. 78)

signal on the EXT I/O

If no valid data exists, only the data count is printed. When only one valid data sample exists, standar d devia­tion of sample and process capability indices cannot be printed.

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Example Printouts

Resistance measurements

1 0.8725mOhm Lo
2 0.484mOhm Lo
3 10.99998 Ohm IN
4 -10.0026 Ohm Lo
27 9.9986 Ohm Hi
28 9.996 Ohm Hi
29 0.01003 Ohm Hi
30 0.00012 Ohm Hi

Measurement fault values

1 OvrRng Hi
2 -OvrRng Lo
3 C.E.Hi -­ 4 C.E.Lo -­ 5 C.E.Volt -­ 6 -------- --

• The “Valid” st atistical calculation result indicates the number (count)

of data samples not subject to errors such as measurement faults.

• Among the comparator decision result counts (Hi, IN, Lo, and OR),

“OR” indicates the number (count) of out-of-range measurements.

Auto-memory data and statistical calculation results

Date: 11-02-01 Time: 06:18:00
Ref: 1000.000 Ohm Upp: +1.000% Low: -1.500%
1 999.885 Ohm -0.011% IN
2 1001.885 Ohm +0.189% IN
3 1002.394 Ohm +0.239% IN
4 1002.892 Ohm +0.289% IN
5 1012.894 Ohm +1.289% Hi
6 1000.897 Ohm +0.090% IN
7 998.902 Ohm -0.110% IN
8 994.888 Ohm -0.511% IN
9 1000.391 Ohm +0.039% IN
10 979.892 Ohm -2.011% Lo
Hi: 1 IN: 8 Lo: 1 OR: 0
Number: 10 Valid: 10
Max 1012.894 Ohm +1.289% ( 5)
Min 979.892 Ohm -2.011% ( 10)
Avg 999.492 Ohm -0.051%
Sn 7.83568 Ohm
Sn-1 8.25953 Ohm
Cp 0.50
CpK 0.42

87

7.3 Printing

7

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89

Signal input/output

Connect the instrument’s EXT I/O
connector to the signal output or
input device.

Make instrument settings
(p. 97)

8.1 External Input/Output Connector and Signals

External Control Chapter 8

The EXT I/O connector on the rear of the instrument supports external control by providing outp ut of
the end-of-measurement and comparator decision signals, and accepting input of measurement
trigger and key-lock signals. All signals are isolated by optocouplers (inputs and outputs share a
common signal ground).

Confirm input and output ratings, understand the safety precautions for connecting a control sys­tem, and use accordingly.

8.1 External Input/Output Connector
and Signals

To avoid electric shock or damage to the equipment, always observe the following
precautions when connecting to the EXT I/O terminals.

• Always turn off the power to the instrument and to any devices to be connected

before making connections.

• Be careful to avoid exceeding the ratings of external terminals (p. 95).

• During operation, a wire becoming dislocated and contacting another conductive

object can be serious hazard. Use screws to secure the external connectors.

• Ensure that devices and syste ms to be connected to the EXT I/O ter minals ar e prop-

erly isolated.

• The ISO_5V pin of the EXT I/O connector is a 5 V power output, and the ISO_12V pin

is a 12 V power output. Do not apply external power to this pin.

To avoid damage to the instrument, observe the following cautions:

• Do not apply voltage or current to the EXT I/O terminals that exceeds their ratings.

• When driving relays, be sure to install diodes to absorb counter-electromotive force.

• Be careful not to short-circuit ISO_5V to ISO_COM.

• Be careful not to short-circuit ISO_12V to ISO_COM.

• Do not draw loads from ISO_5V and ISO_12V at the same time.

See: "Connector Type and Signal Pinouts" (p. 90)

8

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90

EXT I/O Connector (Instrument Side)

Connector: (Instrument Side)

37-pin D-sub female with #4-40 screws

Mating Connectors:

DC-37P-ULR (solder type) /
DCSP-JB37PR (pressure weld type)
Japan Aviation Electronics Industry Ltd.

TRIG

(Reserved)

KEY_LOCK

(Reserved)

(Reserved)

0ADJ

HOLD

ISO_5V

ISO_COM

ERR

HI

LO

CE_HI

(Reserved)

(Reserved)

(Reserved)

(Reserved)

(Reserved)

(Reserved)

(Reserved)

CAL

(Reserved)

(Reserved)

PRB_CHECK

(Reserved)

PRINT

ISO_COM

EOM

INDEX

IN

PRB_SHORT

CE_LO

(Reserved)

(Reserved)

(Reserved)

(Reserved)

ISO_12V

12345678910111213141516171819

202122232425262728293031323334353637

8.1 External Input/Output Connector and Signals

Connector Type and Signal Pinouts

Pos: positive, Neg: negative,: not applicable

Pin

Signal name I/O Function Logic Pin Signal name I/O Function Logic

1TRIG

(Reserved)

2
3

KEY_LOCK

(Reserved)

4

(Reserved)

5

6

0ADJ

7

HOLD

8

ISO_5V

9

ISO_COM

10

ERR

11

HI

12

LO

13

CE_HI

(Reserved)

14

(Reserved)

15

(Reserved)

16

(Reserved)

17

(Reserved)

18

(Reserved)

19

External trigger

IN





Key-Lock Neg Level

IN









Execute zero-ad-

IN

just
Enable external

IN

triggering
Isolated 5 V power



output
Isolated common



signal ground
Measurement fault Neg Level

OUT

HI comparator

OUT

decision
LO comparator

OUT

decision
Probe (HI side)

OUT

contact error

























Pos/

Neg

Neg Edge

Neg Level

Neg Level

Neg Level

Neg Level























Edge

20 (Reserved)
21




















CAL

(Reserved)

22

(Reserved)

23
24

PRB_CHECK

25

(Reserved)

26

PRINT

27

ISO_COM

28

EOM

29

INDEX

30

IN

31

PRB_SHORT

32

CE_LO

(Reserved)

33

(Reserved)

34

(Reserved)

35

(Reserved)

36
37

ISO_12V

Reserved pins are not connected inside the instrument.
Do not connect to reserved pins.





Execute self-calibra-

IN

tion









Execute probe short-

IN

circuit detection





Print measured val-

IN

ue
Isolated common

-

signal ground
End of measurement Neg Edge

OUT

Analog measure-

OUT

ment finished
IN comparator

OUT

decision
Probe short-circuit

OUT

error
Probe (LO side)

OUT

contact error

















Isolated 12 V power



output



Neg Edge




Neg Edge



Neg Edge





Neg Edge

Neg Level

Neg Level

Neg Level










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•The 0ADJ signal should be asserted (Low) for at least 10 ms.

• The connector shell is conductively connected to the metal instrument chassis and the protective earth pin
of the power plug. Be aware that it is not isolated from ground.

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Signal Descriptions

Input Signals

When external triggering (EXT) is enabled, one measuremen t is performed at the fall ing (ON)
or rising (OFF) edge of the TRIG
selected on the Settings screen (default: falling (ON) edge).
When internal triggering (INT) is enabled, external triggering is disabled. Also, when the Set-

TRIG

tings Monitor function is enabled and an error occurs, triggering is disabled (p. 56).
The TRIG

• Stores statistical calculation data (when statistical calculation is enabled)

• Stores measured data to internal memory (when the data memory function is enabled)

(also operates with internal triggering)

91

8.1 External Input/Output Connector and Signals

signal. Falling (ON) or rising (OFF) edge trigg ering can be

(p. 98)

signal performs the following operations in addition external triggering:

0ADJ

PRINT Asserting the PRINT signal prints the current measurement value.

CAL

HOLD

PRB_CHECK

KEY_LOCK

Asserting the 0ADJ signal executes zero adjustment once.
To avoid malfunction, this signal should be asserted (Low) for at least 10 ms.

Asserting the CAL signal executes self calibration. The time required for self calibration is as
follows:
Approximately 130 ms (with 60-Hz line frequency setting), or 110 ms (with 50-Hz setting)
If asserted during measurement, executes after the end of measurement.

Holding the HOLD signal low enables external triggering. When the HOLD signal is high, the
settings made on the Settings screen or by commands are re-enabled.

Asserting the PRB_CHECK signal executes probe short-circuit adjustment one time. If
asserted during measurement, executes after the specified time from the end of measurement.

While the KEY_LOCK signal is held low, all front panel keys (except POWER button) are dis­abled (key unlock and remote control cancellation operations are also disabled).

Output Signals

This signal indicates that a measurement fault has occurred (except out-of-range detection). It

ERR

CE_HI

is updated simultaneously with the EOM signal. At this time, comparator decision outputs are
all de-asserted (high).

This signal indicates that a contact check error has occurred between H
tacts. It is updated simultaneously with the EOM

puts are all de-asserted (high).

signal. At this time, comparator decision out-

CUR

and H

POT

(p. 32)

(p. 86)

(p. 60)

(p. 54)

(p. 63)

8

(p. 38)

con-

(p. 49)

CE_LO

PRB_SHORT

INDEX

EOM

HI, IN, LO

This signal indicates that a contact check error has occurred between L
tacts. It is updated simultaneously with the EOM

puts are all de-asserted (high).
This signal indicates that a foreign object is shorting the POT and C UR contacts in a four-ter-

minal probe tip. At this time, comparator decision outputs are all de-asserted (high).
This signal indicates that A/D conversion in the measurement circuit is finished.

When the asserted (low) state occurs, the measurement sample can be removed.
This signal indicates the end of a measurement. At this time, the states of the comparator deci-

sion outputs and ERR
These are the comparator decision output signals.

, CE_HI, CE_LO, and PRB_SHORT are all determined.

signal. At this time, comparator decision out-

CUR

and L

POT

con-

(p. 49)

(p. 54)

(p. 97)

• Input signals are ignored when the following are displayed: Basic, Detailed, and Comparator Settings
screens; Statistical Calculation Results screen (except for the print signal); and error messages (except
Setting Monitor errors).

• EXT I/O input and output signals are not usable while changing measurement settings.

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92

Contact check

Measurement

currents

Contact Improver

Checking

Measurement

processing

Available

End of
Measurement

8.2 Timing Chart

8.2 Timing Chart

Each signal level indicates a corresponding voltage level.

•The

• A self-calibration measurement (approximately 130 ms) is automatically performed every 10 minutes

• Do not apply a

• When changing settings such as measurement range, allow about 150 ms proc essin g time befor e applying

• Input signals are ignored when the following are displayed: Basic, Detailed, and Comparator Settings

•The

• Output of comparator decisions and error signals are determ ined before the

• With internal (INT) triggering, the

• When using the internal trigger [INT], the setting for the DELAY1 (t2) time is increased by 100 ms.

EOM operation when the EOM

The
The

See: "Setting End-of-Measurement Signal Output (EOM Signal Setting)" (p. 97)

EOM signal is operational when the trigger source setting is EXT and the EOM output setting is Pulse.

(between measurements).
ment is delayed until self-calibration is finished.

TRIG signal while measuring using external triggering (the signal is ignored).

TRIG signal.

a
screens; Statistical Calculation Results screen (except for the print signal); and error messages (except

Setting Monitor errors).

INDEX and EOM signals are de-asserted simultaneously.

nals are not de-asserted (OFF) when measurement starts.

EOM signal is asserted (ON) at the end of measurement.
EOM signal continues to be asserted until measurement starts again with the next TRIG signal input.

TRIG signal input is accepted during that ti me, but the correspond ing measure-

EOM signal is asserted.

EOM signal is fixed High (OFF). Also, comparator decisions and error sig-

Output setting is Hold

The EOM

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signal is de-asserted when the next measurement is started by the next TRIG signal.

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93

Output Signal State at Power-On

All signals are low (asserted active-low) when power is turned on.
All output signals become high (de-asserted active-low) when ch anging from the
initial screen to the Measurement screen.

Operation is shown when the trigger source is set to external triggering (EXT).

Instrument
State

Power-On

Initial Screen Measurement Screen

8.2 Timing Chart

Timing Chart Interval Descriptions

Inter-

Description Duration Remarks

val

Trigger Pulse

t0

Asserted (ON)
Trigger Pulse

t1

De-asserted (OFF)

t2 Delay 1 0 to 100 ms

t3 Delay 2 0 to 100 ms

1

t4 *

Measurement time 0.1 to 100 ms

t5 Calculation time 0.1 ms Calculation time is longer when memory storage is enabled.
t6 EOM pu lse width 1 to 100 ms Setting-de pendent

*1: When the averaging function is on, the processing (t3 + t4) (time) is repeated the set number of times.

Internal Delay

Range Internal Delay [ms]
10m 3.5
100m (1A) 1.6
100m (100mA) 1.4
1000m 0.7
10 0.5
100 0.5
1000 0.5

0.1 ms or more Falling (ON)-/rising (OFF)-edge selectable

0.1 ms or more
Setting-dependent (when using the internal trigger, increased by 100

ms)
Setting-dependent (When the Contact Improver function is set to

Pulse, 0.1 ms is added.)
OVC OFF: Integration Time + Internal Delay (see following table)

OVC ON: (Integration Time + Internal Delay)

8

× 2 + Delay2

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94

Input Circuit

Output Circuit

PLC, etc. (Controller)

Internally Isolated
Common Signal Ground

Do not apply external power

Common

Output

PLC, etc. (Controller)

Input

Common
Internally Isolated
Common Signal Ground

Zener Voltage
30 V

Internally Isolated 5 V

Internally Isolated 12 V

Internally Isolated 5 V

Internally Isolated 12 V

8.3 Internal Circuitry

8.3 Internal Circuitry

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Electrical Specifications

95

8.3 Internal Circuitry

Input Signals

Output Signals

Internally Isolated
Power Output

Input type Optocoupler-isolated, non-voltage contact inputs

(source input, active-low)
Input asserted (ON) voltage 1 V or less
Input de-asserted (OFF) voltage Open or 5 to 30 V
Input asserted (ON) current 3 mA/ch
Maximum applied voltage 30 V

Output type Optocoupler-isolated npn open-collector outputs

(current sink, active-low)
Maximum load voltage 30 V
Maximum output current 50 mA/ch
Residual voltage 1 V (10 mA), 1.5 V (50 mA)

+5 V power output

Output Voltage 4.5 to 5.0 V
Maximum output current 100 mA

+12 V power output

Output Voltage 11.0 to 13.0 V
Maximum output current 20 mA

External power input none

• The maximum output current figures for the +5 V and +12 V power outputs assume stan-

dalone use. Do not draw loads from the power supplies at the same time.

8

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96

Input Circuit
Connection Examples

Output Circuit
Connection Examples

Input

Input

Input

Output

Output

Common

Input

Common

Output

Output

Output

Output

Output

Output

Output

Input

Common

Input

Common

Active-Low Logic Output

Wired OR

Relay Connections

LED Connection

PLC Output (Source Output) Connections

PLC Output (Sink Output) Connections

Relay Connections

Switch Connections

PLC Input (Sink Input) Connections

PLC Input (Source Input) Connections

Active-Low
Logic Output

8.3 Internal Circuitry

Connection Examples

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97

The Basic Settings screen appears.

The System screen appears.
[SYSTEM]

1

Selection

2

Selection

1

2

The specified pulse is output after end­of-measurement (default).

The EOM signal remains asserted after
end-of-measurement (to step 5).

Setting range: 1 ms to 100 ms (default: 5 ms)

2
3

Selection

1

The confirmation screen appears.

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

8.4 External I/O Settings

8.4 External I/O Settings

These settings affect the logic of the end-of-measurement and trigger signals.

Setting End-of-Measurement Signal Output (EOM Signal Setting)

The selected EOM output level is retained until the next trigger input, or for the specified pulse
width.

Open the Basic Settings screen.

1

Open the System screen.

2

Select the EOM signal output type.

3

(When PULSE is selected)

4

Select the pulse width.

8

Return to the Measurement screen.

5

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98

The Basic Settings screen appears.

The System screen appears.
[SYSTEM]

1

Selection

2

Selection

1

2

Measurement starts at the rising (OFF)
edge of the (active-low) signal.

Measurement starts at the falling (ON)
edge of the (active-low) signal. (default)

The confirmation screen appears.

Return to the setting screen.
Save setting and return to

previous screen.
Discard setting and return to

previous screen.

8.4 External I/O Settings

Setting the Trigger (TRIG) Signal Logic

Select whether triggering occurs on the falling (ON) or rising (OFF) edge.

Open the Basic Settings screen.

1

Open the System screen.

2

Select the triggering logic edge.

3

Return to the Measurement screen.

4

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8.5 External Control Q&A

Common Questions Answers

99

8.5 External Control Q&A

How do I connect external trigger input?

Which pins are common ground for
input and output signals?

Are the common (signal ground) pins
shared by both inputs and outputs?

How do I confirm output signals?

How do I troubleshoot input (control)
signal issues?

Are the comparator decision signals
retained during measurement (or can
they be off)?

Why would the EOM signal not be
detected?

Connect the (active low) TRIG input pin to an ISO_COM pin using a
switch or open-collector output.

The ISO_COM pins.

Both common ground pins can be shared by inputs and outputs.

Confirm voltage waveforms with an oscilloscope. To do this, the output
pins such as EOM and comparator decision outputs need to be pulled up

(through several k
For example, if triggering does not operate properly, bypass the PLC and

short the TRIG pin directly to an ISO_COM pin. Be careful to avoid power
shorts.

The state is determined at the end of measurement, and is off once at the
start of measurement.

Try using the Pulse setting for EOM output.
When the measurement time is short and EOM
time to de-assert may be too short to be detected by the PLC. When the
EOM output is set to Pulse, the signal is asserted (ON) for the specified
pulse width before turning off.

).

output is set to Hold, the

What situations cause measurement
faults to occur?

Is a connector or flat cable for connec­tion provided?

Is direct connection to a PLC possible?

Can external I/O be used at the same
time as RS-232C or other communica­tions?

How should external power be con­nected?

Can free-running measured values be
acquired using a footswitch?

An error is displayed in the following cases:

• A probe is not connected

• A contact is unstable

• A probe or measurement object is dirty or corroded

• Measurement object resistance is much higher than the measurement

range

A solder-type connector is supplied. The cable must be prepared at the
user's side.

Direct connection is supported for relay or open-collector outputs and
positive-ground optocoupler inputs. (Before connecting, confirm that volt­age and current ratings will not be exceeded.)

After setting up communications, it is possible to control measurement
with the TRIG signal while acquiring measurement data via a communi­cations interface.

The instrument's external I/O input and output signals all operate from an
internal isolated power source, so power must not be supplied from the
PLC side.

Please use the free software for acquiring measured values available for
download from our website.

8

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100

E Nut #4-40UNC

Required tools:

• Screwdriver

• Shielded cable

• Soldering iron

Accessories

• A Cover.....................................2

• B Screws (+/-) #4-40UNC

(16.9 mm overall length) .......2

• C Screws (+/-) #4-40UNC

(12.6 mm overall length) .......2

• D Screws () #4-40UNC

(15.0 mm overall length) .......2

• E Nuts #4-40UNC.....................2

• F Cable Clamps........................2

• G Saddle Washers

(shell protection)....................2

• H Connector..............................1

B Screw (+/-) #4-40UNC (16.9 mm overall length)

A Cover

(Identical halves)

Shielded Cable
(recommended)

D Screw () #4-40UNC

(15.0 mm overall length)

B Screw (+/) #4-40UNC

(16.9 mm

overall length)

E Nut #4-40UNC

D Screw () #4-40UNC

(15.0 mm overall length)

A Cover

(Identical halves)

F Cable Clamps

G Saddle Washers

(shell protection)

Assembly Sequence

1. Solder the (shielded) cable wires to the supplied EXT I/O connector (H) pins.

2. Affix the cable clamps (F) on the cable with screws (C).

3. Position the cable clamps (F) to fit properly inside the cover (A).

4. Insert screws (D) through the saddle washers (G).

5. In one half of cover (A), place connector (H), clamps (F), saddle washers (G) and screws (D).

6. Place the other half of cover (A) on top.

7. Affix the halve s of th e co ver (A) to ge th er with scr ew s (B ) and nu ts (E).

Be careful not to overtighten the screws, which could damage the covers.

H Connector

C Screw (+/) #4-40UNC

(12.6 mm overall length)

8.6 Supplied Connector Assembly

8.6 Supplied Connector Assembly

The EXT I/O connector and shell are supplied with the instrument. Assemble as shown below.

• Use shielded cables to connect a PLC to the EXT I/O connector. Using non-shielded conductors may result
in system errors from electrical noise.

• Connect the shield to the ISO_COM pin of the EXT I/O connector.

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101

Wiring Diagram (p. 103)

Connect the Instrument
and Controller with a GP-IB
or RS-232C Interface Cable

Communications

Communications Protocol Settings
(p. 105)

Entering an address
Set the instrument to the same

communications protocol as the
controller

Select the transmission format

9.1 Overview and Features

Communications
(RS-232C/ GP-IB

Interface) Chapter 9

The symbols shown below indicate that the following instructions are specific to the RS-232C or the GP-IB
interface. Instructions without these symbols are for both the RS-232C and the GP-IB interface.

: RS-232C only/ : GP-IB only

Before Use

• Always make use of the connector screws to affix the GP-IB or RS-232C connectors.

• When issuing commands that contain data, make certain that the data is provided in the specified format.

• External command operation is undetermined when the Printer is selected as the interface type. In this
case, commands should not be sent.

9.1 Overview and Features

The instrument can be controlled by GP-IB or RS-232C. Instrument settings can also be reset.

Using the RS-232C, the measurement values can be printed out by connecting the instrument to
the commercially available printer with a serial interface (p. 83).

IEEE 488.2-1987 standard (essential) commands can be used.

Applicable standard IEEE 488.1-1987

•

• Reference standard IEEE 488.2-1987

If the output queue becomes full, a query error is generated and the output queue is cleared. Therefore, clear­ing the output queue and query error output from the deadlocked condition
supported.
For details about the communications commands, see "Message Format" (p. 109) and "Message Reference
Interpretation" (p. 126)

.

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*1. ANSI/IEEE Standard 488.1-1987, IEEE Standard Digital Interface for Programmable Instrumentation
*2. ANSI/IEEE Standard 488.2-1987, IEEE Standard Codes, Formats, Protocols, and Common Commands
*3. The situation in which the input buffer and the output queue become full, so that processing cannot continue.

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*1
*2

*3

as defined in IEEE 488.2 is not

9