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HIOKI RM3548
User guide
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User guide [de]
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HIOKI HIOKI RM3548 User guide

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RM3548
Instruction Manual
RESISTANCE METER
June 2021 Revised edition 4 RM3548A981-04 21-06H
EN
*600397884*

How to use the Instruction Manual (this manual)

See below, as appropriate:
Be sure to always read the following sections.
When you wish to use the instrument immediately
When you need further information on the various functions
To nd out about instrument specications
If the instrument does not operate as intended or expected
For detailed information related to resistance measurement
“Safety Notes” (p. 4)
“Usage Notes” (p. 7)
“Overview” (p. 15)
Refer to the “Contents” (p. i) and/or “Index”
(p. Ind.1) to nd the desired function.
“Specications” (p. 93)
“Troubleshooting” (p. 108)
“Appendix” (p. Appx.1)
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RM3548A981-04
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付録索引

Contents

Introduction ........................................................................................1
Verifying Package Contents .............................................................2
Safety Notes ....................................................................................... 4
Usage Notes ....................................................................................... 7
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1 Overview 15
1.1 Overview and Features .................................................15
1.2 Component Names and Operation Overview ............. 16
Power-on settings ....................................................................20
1.3 Flow of Measurement ...................................................21
1.4 Screen Layout ...............................................................22
1.5 Checking the Measurement Target .............................25
2 Preparing for Measurement 27
2.1 Attaching the Strap ....................................................... 28
2.2 Loading or Replacing the Batteries ............................29
2.3 Connecting the Test Leads ..........................................30
2.4 Connecting the Z2002 Temperature Sensor
(When Using TC or ΔT) ................................................. 31
2.5 Turning the Power On/Off ............................................32
Turning the power on ...............................................................32
Turning the power off ...............................................................32
Automatic power off with auto power save (APS) .................... 33
Disabling auto power save (APS) ............................................33
2.6 Pre-measurement Inspection .......................................34
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3 Basic Measurement 35
3.1 Setting the Measurement Range .................................36
3.2 Connecting the Test Leads to the Measurement
3.3 Reading the Measured Value .......................................39
Target .............................................................................38
Switching the display................................................................39
Verifying measurement errors ..................................................40
Holding a measured value .......................................................42
Memorizing a measured value ................................................. 42
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Appx. Ind.
i
Contents
4 Customizing Measurement Conditions 43
4.1 Using Zero Adjustment.................................................44
4.2 Stabilizing Measured Values (Averaging Function) ...49
4.3 Compensating for Thermal Effects
(Temperature Correction (TC)) ..................................... 50
4.4 Compensating for Thermal EMF Offset (Offset
Voltage Compensation Function: OVC Function) ...... 51
4.5 Setting the Delay Time for Measurement
(Delay Function) ............................................................ 53
4.6 Switching the Measurement Current (In the 300m
Range) ................................................... 55
Ω
5 Judgment and Conversion Functions 59
5.1 Judging Measured Values (Comparator Function) ....60
Judging based on upper and lower limit values (ABS mode) .. 63 Judging based on a reference value and allowable range
(REF% mode) ..........................................................................64
Verifying a judgment with a sound (judgment sound function) . 65 Verifying a judgment on a handheld device
(L2105 LED Comparator Attachment option) ..........................66
5.2 Performing Temperature Rise Test
(Temperature Conversion Function (∆T)) ...................67
5.3 Measuring the Length of a Conductor
(Length Conversion Function) ..................................... 69
6 Panel Save and Load (Saving and Loading
Measurement Conditions) 71
6.1 Saving Measurement Conditions
6.2 Loading Measurement Conditions
6.3 Clearing the Contents of a Panel .................................74
7 Memory Function (Saving and Exporting
Measurement Data to a PC) 75
7.1 Saving Data at Specied Time (Manual Memory) ......77
ii
(Panel Save Function) ..................................................72
(Panel Load Function) ..................................................73
Contents
7.2 Saving Data Automatically When Measured
Values Stabilize (Auto-Memory) ..................................78
7.3 Saving Data at Fixed Intervals
(Interval Memory Function) .......................................... 79
7.4 Displaying Saved Measurement Data
(Memory Display Function) .......................................... 81
7.5 Clearing Measurement Data (Memory Clear) .............82
7.6 Exporting Saved Measurement Data to a PC
(USB Mass Storage Mode) ...........................................86
8 System Settings 89
8.1 Displaying the Date and Time Verication Screen ....89
8.2 Setting the Clock ........................................................... 90
8.3 Initializing (Reset) .........................................................91
Default settings ........................................................................92
9 Specications 93
9.1 General Specications .................................................93
Measurement range ................................................................. 93
Measurement method .............................................................. 93
Measurement specications.....................................................93
Accuracy ..................................................................................96
Functions..................................................................................97
Interface ................................................................................. 104
Environmental and safety specications ................................ 105
Accessories ............................................................................ 105
Options ................................................................................... 106
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10 Maintenance and Service 107
10.1 Troubleshooting ..........................................................108
10.2 Repair and Inspection ................................................ 115
10.3 Replacing Fuses ......................................................... 116
10.4 Disposing of the Instrument ...................................... 117
Q&A (frequently asked questions and answers) ....................108
Error display and actions........................................................ 114
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Appx. Ind.
Contents
Appendix Appx.1
Appx. 1 Block Diagram ...............................................Appx.1
Appx. 2 Four-Terminal (Voltage-Drop) Method .........Appx.2
Appx. 3 DC Method and AC Method ..........................Appx.3
Appx. 4 Temperature Correction Function (TC) .......Appx.4
Appx. 5 Temperature Conversion (ΔT) Function ......Appx.7
Appx. 6 Effect of Thermoelectromotive Force
(Thermal EMF) ................................................Appx.8
Appx. 7 Zero Adjustment .......................................... Appx.11
Appx. 8 Unstable Measurement Values ...................Appx.17
Appx. 9 Locating Short-Circuits on a PC Board ..... Appx.27
Appx. 10 Test Lead Options .......................................Appx.28
Appx. 11 Calibration .................................................... Appx.30
Index Ind.1
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Introduction

Introduction
Thank you for purchasing the HIOKI RM3548 Resistance Meter. To obtain maximum
performance from the instrument, please read this manual rst, and keep it handy for
future reference.
Trademarks
Windows and Microsoft Excel are either registered trademarks or trademarks of Microsoft Corporation in the UnitedStates and other countries.
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Appx. Ind.
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Verifying Package Contents

電池
電池
Verifying Package Contents
• When you receive the instrument, inspect it carefully to ensure that no damage occurred during shipping. In particular, check the accessories, panel switches, and connectors. If damage is evident, or if it fails to operate according to the
specications, contact your authorized Hioki distributor or reseller.
• When transporting the instrument, use the same packaging materials used for the delivery to you.
Check the package contents as follows.
RM3548 Resistance Meter Instruction Manual
L2107 Clip Type Lead (p. 30) USB Cable (A-miniB type)
Z2002 Temperature Sensor (p. 31) Strap
LR6 Alkaline battery × 8
2
Spare fuse (F2AH/250 V)
Verifying Package Contents
JAPAN
Options
The options listed below are available for the instrument. To order an option, please
contact your authorized Hioki distributor or reseller. Options are subject to change.
Please check Hioki’s website for the latest information. (p. Appx.28)
L2107 Clip Type Lead 9467 Large Clip Type Lead
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9453 Four-Terminal Lead 9772 Pin Type Lead
9465-10 Pin Type Lead 9454 Zero Adjustment Board
Z2002 Temperature Sensor L2105 LED Comparator Attachment
C1006 Carrying Case
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Appx. Ind.
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Safety Notes

Safety Notes
The instrument is designed to conform to IEC 61010 Safety Standards, and has been thoroughly tested for safety prior to shipment. However, using the instrument in a way not described in this manual may negate the provided safety features.
Before using the instrument, be certain to carefully read the following safety notes.
DANGER
Mishandling during use could result in injury or death, as well as damage to the instrument. Be certain that you understand the instructions and precautions in the manual before use.
WARNING
With regard to the electricity supply, there are risks of electric shock,
heat generation, re, and arc discharge due to short circuits. If
persons unfamiliar with electricity measuring instruments are to use the instrument, another person familiar with such instruments must supervise operations.
This manual contains information and warnings essential for safe operation of
the instrument and for maintaining it in safe operating condition. Before using the
instrument, be certain to carefully read the following safety notes.
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Safety Notes
Notation
In this manual, the risk seriousness and the hazard levels are classied as follows.
DANGER
WARNING
CAUTION
IMPORTANT
Indicates an imminently hazardous situation that will result in death or serious injury to the operator.
Indicates a potentially hazardous situation that may result in death or serious injury to the operator.
Indicates a potentially hazardous situation that may result in minor or moderate injury to the operator or damage to the instrument or
malfunction.
Indicates information related to the operation of the instrument or maintenance tasks with which the operators must be fully familiar.
Indicates prohibited actions.
Indicates the action which must be performed.
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p. Indicates the location of reference information.
[ ] An item enclosed by [ ] indicates a key name.
Unless otherwise noted, Windows XP, Windows Vista, Windows 7, and Windows 8 are referred to as “Windows”.
Additional information is presented below.
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Appx. Ind.
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Safety Notes
Symbols afxed to the instrument
Indicates cautions and hazards. When the symbol is printed on the instrument,
refer to a corresponding topic in the Instruction Manual.
Indicates a fuse.
Indicates DC (Direct Current).
Symbols for various standards
Indicates the Waste Electrical and Electronic Equipment Directive (WEEE Directive) in EU member states.
Indicates that the instrument conforms to regulations required by the EU Directive.
Screen display
The instrument uses the following screen displays.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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Accuracy
We dene measurement tolerances in terms of f.s. (full scale), rdg. (reading) and dgt.
(digit) values, with the following meanings:
f.s.
rdg.
dgt.
See: “Accuracy calculation examples” (p. 96)
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(Maximum display value) This is usually the maximum display value. In the instrument, this indicates the currently used range.
(Reading or displayed value) The value currently being measured and indicated on the measuring instrument.
(Resolution) The smallest displayable unit on a digital measuring instrument, i.e., the input value that causes the digital display to show a “1”.

Usage Notes

Usage Notes
Follow these precautions to ensure safe operation and to obtain the full benets of
the various functions.
Use of the instrument should conrm not only to its specications, but also to the specications of all accessories, options, batteries, and other equipment in use.
Checking before use
Before using the instrument the rst time, verify that it operates normally to ensure that no damage occurred during storage or shipping. If you nd any damage, contact your authorized Hioki distributor or reseller.
DANGER
Before using the instrument, check that the coating of the test leads or cables are neither ripped nor torn and that no metal parts are
exposed. Using the instrument under such conditions could result in electrocution. Replace the test leads with those specied by our
company.
Installation
Installation environment
Operating temperature and humidity ranges
Storage temperature and humidity ranges
Installing the instrument in inappropriate locations may cause a malfunction of instrument or may give rise to an accident. Avoid the following locations.
0°C to 40°C 80%RH or less (no condensation)
-10°C to 50°C 80%RH or less (no condensation)
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• Exposed to direct sunlight or high temperature
• Exposed to corrosive or combustible gases
• Exposed to water, oil, chemicals, or solvents
• Exposed to high humidity or condensation
• Exposed to a strong electromagnetic eld or electrostatic charge
• Exposed to high quantities of dust particles
• Near induction heating systems (such as high-frequency induction heating systems and IH cooking equipment)
• Susceptible to vibration
CAUTION
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Appx. Ind.
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Usage Notes
IMPORTANT
Accurate measurement may be impossible in the presence of strong magnetic
elds, such as near transformers and high-current conductors, or in the presence of strong electromagnetic elds such as near radio transmitters.
Handling precautions
WARNING
• Do not allow the instrument to get wet, and do not use it with wet hands. This may cause electric shock accident.
• Do not modify, disassemble, or repair the instrument. This may
result in re, electric shock accident, or injury.
CAUTION
• Do not place the instrument on an unstable or slanted surface. It may
drop or fall, causing injury or instrument failure.
• To avoid any damage to the instrument, avoid any vibration or shock during transport or handling. Especially, be careful not to drop or fall the instrument which will cause shock.
• To avoid any damage to the instrument, do not input voltage or current to any measurement, TEMP.SENSOR, or COMP.OUT terminals.
Precautions during shipment
Observe the following during shipment. Hioki cannot be responsible for damage that occurs during shipment.
• During shipment of the instrument, handle it carefully so that it is not damaged due to a vibration or shock.
• To avoid damage to the instrument, remove the accessories and optional equipment from the instrument during shipment.
If the instrument is not used for an extended period of time
IMPORTANT
To avoid corrosion and/or damage to the instrument due to battery leakage, remove the batteries from the instrument if it is to be kept in storage for an extended period.
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CAUTION
Handling leads and cables
Usage Notes
DANGER
To avoid electrical shock accident, do not short test leads where voltage is applied.
CAUTION
• Avoid stepping on or pinching the leads, which could damage the lead insulation.
• To avoid damaging the cables, do not bend or pull the base of cables and the leads.
• When removing a connector, hold its plug portion, not its cable, to prevent a wire disconnection.
• The ends of pin type leads are sharp. Be careful to avoid injury.
• Melted lead wire is dangerous because its metal part is exposed.
Be careful not to allow contact between the lead wire and the heat
generating portion.
• The Z2002 Temperature Sensor is precision-machined. Excessively high voltage pulses or static electricity may damage the sensor.
• Do not apply an excessive impact to the tip of the Z2002 Temperature Sensor or bent the lead wire. It may cause failure or wire disconnection.
IMPORTANT
• Do not use any test lead or temperature sensor other than the ones specied by
our company. It may result in inaccurate measurement due to poor contact or other reasons.
• If the jack of a test lead or the temperature sensor is dirty, wipe it off. Otherwise,
the contact resistance will increase, affecting the temperature measurement.
• Be careful so that the temperature sensor connector does not come off. (The
temperature correction or conversion function will not work if the connector comes off.)
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Before attaching the strap
Use the four attachment points on the instrument to attach the strap securely. Otherwise, the instrument may drop during carrying, damaging the instrument.
CAUTION
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Appx. Ind.
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Usage Notes
Batteries
Poor performance or damage from battery leakage could result. Observe the cautions listed below.
WARNING
• Do not short circuit, charge, disassemble, or incinerate batteries. Doing so may cause an explosion and is dangerous.
• To avoid electric shock accident, remove any test leads before replacing batteries.
• After the replacement, be sure to reattach the cover.
CAUTION
• Do not use both new and old batteries or different types of batteries together.
• Be careful to observe battery polarity. Otherwise, poor performance or damage from battery leakage could result.
• Do not use batteries after their recommended expiry date.
• Do not allow used batteries to remain in the instrument.
• To avoid corrosion and/or damage to the instrument due to battery leakage, remove the batteries from the instrument if it is to be kept in storage for an extended period.
IMPORTANT
• When possible. When Replace the batteries.
• Be sure to turn the power off after using it.
• In this manual, the “batteries” are those used to power the instrument.
• Do not use any batteries other than the specied type (LR6 alkaline batteries). Ni-MH batteries may cause battery leakage, depending on the degree of battery charge and deterioration.
• Dispose of batteries in accordance with local regulations.
Remaining battery level indicator
The battery is fully charged.
As the remaining amount of batteries becomes low, the bars disappear from the left.
The battery becomes low. Replace the batteries as soon as possible.
(Blinking) There is no battery remaining. Replace the batteries with new ones.
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is lit, the battery becomes low. Replace the batteries as soon as
is blinking, the battery becomes too low for measurement.
Indication
Before connecting test leads
Usage Notes
DANGER
To avoid electric shock or short-circuit accident, turn any measurement target off before connecting test leads.
Before connecting the L2105 LED Comparator Attachment
CAUTION
• To prevent the instrument and the L2105 LED Comparator Attachment from breaking down, turn the power off before connecting the L2105 LED Comparator Attachment.
• The COMP.OUT terminal is for the L2105 only. Do not connect any terminal other than the L2105.
• Connect the temperature sensor securely. Otherwise, the specications may not be met.
• When a tie band is used, do not tighten the test lead excessively. It could damage the test lead.
• Do not perform the following as they could damage the core or coating of a cable.
Twisting or pulling the cable Connecting the cable around the L2105 LED Comparator Attachment by bending it compactly
Before connecting the Z2002 Temperature Sensor
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Connect the Z2002 Temperature Sensor securely. Otherwise,
specications may not be met or a failure may occur.
• To prevent the instrument and the Z2002 Temperature Sensor from breaking down, turn the power off before connecting the Z2002 Temperature Sensor.
• Insert the Z2002 Temperature Sensor all the way into the TEMP.SENSOR terminal. Otherwise, the measurement may have a large error.
IMPORTANT
If the jack of the Z2002 Temperature Sensor is dirty, wipe it off. Otherwise, the
temperature measurement may have an error.
WARNING
CAUTION
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Appx. Ind.
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Usage Notes
Measurement precautions
To avoid electrical shock accident, do not short test leads where voltage is applied.
• To prevent electric shock accident or damage to the instrument, do not apply voltage to any measurement terminal. To avoid electrical accident, remove power from the measurement target before measurement.
• Electrical sparks may occur at the moment of connecting/disconnecting the power cable to/from the measurement target. Do not use the instrument where combustible gases are generated.
• Do not measure a point where voltage is applied. When a motor is turned off, the motor does not stop immediately and is rotating inertially. And, in such a state, a large electromotive force is still being generated. If a transformer or motor is measured immediately after a voltage withstand test, the instrument will be damaged due to induced voltage or residual charge.
• When measuring a transformer or coil with an inductance of 5 H or more and with a resistance of 1
in which a measurement current of 1 A ows. The instrument may be
damaged.
• Do not attempt to measure the internal resistance of a battery. The instrument will be damaged. To measure internal resistance of a battery,
use a HIOKI 3554, 3555, BT3562, BT3563, or 3561 Battery HiTESTER.
DANGER
WARNING
The measurement target is connected to power.
CAUTION
Rotating inertially
or less, do not use the 3mΩ or 30mΩ range
Ω
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Usage Notes
IMPORTANT
• The SOURCE terminals are protected with a fuse. If the fuse is broken, “FUSE” appears, and resistance cannot be measured. In such a case, replace the fuse. (p. 116)
• Since the instrument uses DC current for measurement, it may be affected by thermal EMF (thermoelectromotive force), resulting in a measurement error. If so, use the Offset Voltage Compensation function. “4.4 Compensating for Thermal EMF Offset (Offset Voltage Compensation Function: OVC Function)” (p. 51) “Appx. 6 Effect of Thermoelectromotive Force (Thermal EMF)” (p. Appx.8)
• When a power transformer or open solenoid coil with a high inductance, or the
like is measured, the measured value may not stabilize. If so, connect a lm capacitor of 1 µF or so between the SOURCE A and B terminals.
• Ensure that the SOURCE-A, SENSE-A, SENSE-B, and SOURCE-B terminal connections are isolated from each other. If a core or shield wire touches another, the instrument will become unable to perform accurate four-terminal measurement, resulting in a measurement error.
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Using the Z2002 Temperature Sensor
CAUTION
The Z2002 Temperature Sensor does not have a waterproof construction. Do not put the sensor into water or any other liquid.
IMPORTANT
• When using the temperature correction function, wait until the measurement target and Z2002 Temperature Sensor come close enough to ambient temperature for the measurement. Otherwise, it may result in a large measurement error.
• Do not hold the Z2002 Temperature Sensor with a bare hand. It may cause
enough noise pickup to destabilize the measurement.
• The Z2002 Temperature Sensor is designed for ambient temperature measurement. The temperature of a measurement target cannot be measured correctly even if the Z2002 Temperature Sensor is attached to its surface or other portion.
• Insert the Z2002 Temperature Sensor all the way into the TEMP.SENSOR terminal. Otherwise, the measurement may have a large error.
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Appx. Ind.
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Usage Notes
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1

Overview

1.1 Overview and Features

The Hioki RM3548 employs the four-terminal method to highly accurately measure the DC resistance of measurement targets including motor and transformer windings, and welding, PC board patterns, fuses, resistors, and materials such as conductive rubber. The instrument allows temperature correction and so is especially suitable for measurement targets whose resistance values change with temperature.
Highly reliable specications implemented in a compact, light-weight body
• 35,000-dgt. high resolution
• 0.1µΩ resolution at 1 A measurement current
Neither a warm-up time nor zero adjustment is required before starting measurement
Simple temperature rise test (for temperature estimation during power stop)
• Temperature conversion and interval measurement functions
• Supports copying of measurement data le from the instrument memory to the PC
Well-designed instrument shaped for measuring without taking your hands and eyes off the target, making it ideal for maintenance and large product measurement
• Strap-attachable portable type
• Standard auto-memory and auto-hold, and optional L2105 LED Comparator Attachment
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Appx. Ind.
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Component Names and Operation Overview

1.2 Component Names and Operation Overview

Front
Strap attachment holes (four) (p. 28)
[POWER] key
Turns the power on/off. (p. 32)
Display (p. 22)
Measurement terminals (p. 30)
Operation keys (p. 18)
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Top view
Back view
Set screw
Component Names and Operation Overview
COMP. OUT terminal
Connect an optional L2105 LED Comparator
Attachment. (p. 66)
USB terminal
Connect a USB cable. (p. 86)
TEMP.SENSOR terminal
Connect the included Z2002 Temperature Sensor. (p. 31)
Fuse cover
Contains a fuse for measurement circuit protection. (p. 116)
Serial number
The 9-digit serial number indicates the year (rst two digits)
and themonth of manufacture (next two digits). Do not remove this sticker as the number is important.
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Appx. Ind.
Battery cover
Contains eight LR6 alkaline batteries. (p. 29)
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Component Names and Operation Overview
Operation keys
Key Description
[COMP] key (p. 62)
• Comparator: oFF → ON (ABS mode) → ON (REF% mode)
[BEEPSET] key (press and hold) (p. 65)
• Judgment sound: oFF → Hi → in → Lo → Hi-Lo → ALL1 → ALL2
[TC/∆T] key (p. 50) (p. 67)
• Temperature correction/conversion function: oFF → TC → ΔT
[LENGTH] key (press and hold) (p. 69)
• Length conversion function: oFF → ON
[PANEL] key (p. 73)
• Panel load: Changes the panel No. “PrSEt” initializes the measurement conditions.
[SAVE/CLEAR] key (press and hold) (p. 72, p. 74)
• Saves and clears panels: SAvE → CLr
[AVG] key (p. 49)
• Averaging function: oFF → 2 → 5 → 10 → 20
[OVC] key (press and hold) (p. 51)
• Offset voltage compensation (OVC) function: oFF → on
[] key
• Moves to a different digit of the setting
[DELAY] key (press and hold) (p. 53)
• Delay function: PrSEt (factory default) → 10 ms → 30 ms → 50 ms →
100 ms → 300 ms → 500 ms → 1000 ms
[] key
• Moves to a different digit of the setting
[M.BLOCK SEL] key (press and hold) (p. 76)
• Selects a memory block: A → b → C → d → E → F → G → H → J → L
[+] key
• Changes values and items
[VIEW] key (press and hold) (p. 39)
• Toggles the display: Temperature → no indicator → memory number
(MEMORY No.)
[−] key
• Changes values and items
[DATE] key (press and hold) (p. 89)
• Displays the date and time conrmation screen.
[ESC] key
• Cancels the setting (when in the setting screen)
• Releases a HOLD state (if in a HOLD state)
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[ENTER] key
Applies the setting
Component Names and Operation Overview
Key Description
[MEMORY] key (p. 77)
• Saves the measured values (manual memory)
[START/STOP] key (press and hold) (p. 79)
• Starts/stops interval measurement (when in interval mode)
[READ] key (p. 81)
• Displays saved measurement data
[MEMORY CLEAR] key (press and hold) (p. 82)
• Clears memory: LASt (Latest data from the selected block) → bLoC (Selected
block) → ALL (All data)
[MODE] key (p. 42, p. 78, p. 79)
Switches memory hold mode: oFF → A.HOLD (auto-hold) → A.HOLD,A.MEMORY (auto-memory) → INTERVAL (interval function)
[AUTO] key (p. 37)
Turns on/off the auto range: AUTO lit → not lit
[0 ADJ] key (press and hold) (p. 44)
Zero adjustment
[RANGE] key (p. 36)
Measurement range: 3m
↔ 30mΩ ↔ 300mΩ ↔ 3Ω ↔ 30Ω ↔ 300Ω ↔ 3kΩ ↔ 30kΩ ↔ 300kΩ ↔
Ω
3M
Ω
Operation overview
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Select a function.
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The function shown below each key can be selected by pressing and holding the key.
Congure settings.
2
Name of the key that turns ON when it is pressed
Name of the key that turns ON when it is pressed and held
Changes items/values.
Moves digits.
Apply settings.
3
Cancel
Apply
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Appx. Ind.
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Component Names and Operation Overview

Power-on settings

To perform one of the following settings, it is necessary to turn the power from off to on while holding-down a particular key. For details, see the indicated page.
Clearing zero adjustment (p. 48)
Switching to a different measurement current (p. 55)
Disabling auto power save (APS) (p. 33)
Changing the decimal point character or delimiter
character for a CSV le (p. 88)
Setting the date and time (p. 90)
Clearing all measurement data saved (p. 85)
Resetting the current measurement conditions (p. 91)
Resetting the system (p. 91)
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+ +
+ + +
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1.3 Flow of Measurement

Flow of Measurement
Before using the instrument, be sure to see “Usage Notes” (p. 7).
Preparing for measurement
Attach the strap. (p. 28)
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Load or replace the batteries. (
2
Connect the test leads. (p. 30)
3
Connect a Z2002 Temperature
4
Sensor. (p. 31)
p. 29
Measurement
1
)
2
3 4
Turn the power on and congure settings.* (p. 32)
Connect the test leads to the measurement target. (p. 38)
Clipping a thin wire (with the edge portion of the jaws)
Clipping a thick wire (with the base, non­serrated portion of the jaws)
Read the measured value. (p. 39) Remove the test leads from the
measurement target and turn the power off. (p. 32)
1
2
3
4
5
6
7
8
9
* In the following cases, perform zero adjustment:
The display is not cleared due to thermal EMF or other factors. → The display will be changed
to zero.
(Accuracy is not affected by whether or not the zero adjustment is performed.)
Thermal EMF can also be canceled by using OVC. (p. 51)
Four-terminal connection (called Kelvin connection) is difcult. → The residual resistance of the two-terminal connection wires will be canceled. For zero adjustment procedures, see (p. Appx.11).
10
Appx. Ind.
21
Screen Layout

1.4 Screen Layout

Display (when the entire display is lit)
Displays measurement conditions, settings, measured values, memory numbers (MEMORY No.), panel numbers, comparator settings, judgment results, etc. For information on the error display, see “Error display and actions” (p. 114).
Remaining battery
Indicators (p. 24)
Range
indicator
indicator (p. 10)
APS indicator (p. 33)
Resistance measurement screen
Comparator judgment
result
(p. 60)
22
Range (p. 36)
Using the [VIEW] key to switch the indicator display (p. 39)
(Temperature, no indicator, memory number (MEMORY No.))
Measured
value (p. 39)
Comparator lower limit (p. 60)Comparator upper limit (p. 60)
Screen Layout
Length conversion measurement screen (p. 69)
Interval measurement screen (p. 79)
(The screen shows when ∆T is ON.)
Non-measured value display (see “Verifying measurement errors” (p. 40) for details)
Out-of-range Current fault
Temperature conversion (∆T) measurement screen (p. 67)
Memory No.
Elapsed time
1
2
3
4
5
6
7
The protection function is working Fuse blown out
8
9
10
Appx. Ind.
23
Screen Layout
Indicator Description See
Lit: The comparator function is enabled. Blinking: The processing of the key pressed cannot be performed
because the comparator function is enabled.
Lit: The length conversion function is enabled. Blinking: The processing of the key pressed cannot be performed
because the length conversion function is enabled.
The temperature correction function is enabled. (p. 50)
Lit: The temperature conversion function is enabled. Blinking: The processing of the key pressed cannot be performed
because the temperature conversion function is enabled.
The measured value averaging function is enabled. (p. 49)
The OVC function is enabled. (p. 51)
The auto-hold function is enabled. (p. 42)
The auto-memory function is enabled. (p. 78)
Lit: The zero adjustment function is enabled. Blinking: Zero adjustment is in progress.
Lit: The interval measurement function is enabled. Blinking: The processing of the key pressed cannot be performed
because interval measurement is being performed or the interval measurement function is enabled.
The measurement current is set to Hi (300 mA) at the 300mΩ range. (p. 55)
The measured value is being held. (p. 42)
(p. 62)
(p. 69)
(p. 67)
(p. 44)
(p. 79)
24
The comparator judgment result shows “measured value > upper limit”.
The comparator judgment result shows “lower limit ≤ measured value ≤ upper limit”.
The comparator judgment result shows “measured value < lower limit”.
The range can be changed.
The auto range function is enabled.
Comparator upper limit value
Comparator lower limit value
Comparator reference value
Comparator allowable range
Retainable period of time (when in interval mode)
Measurement elapsed time (when in interval mode) Number of data items that can be retained (p. 76)
Temperature coefcient for temperature correction (when
temperature correction is enabled)
(p. 60)
(p. 36)
(p. 60)
(p. 79)
(p. 50)
Checking the Measurement Target

1.5 Checking the Measurement Target

To carry out proper resistance measurement, change the measurement conditions appropriately according to the measurement target. Before starting measurement,
use the examples recommended in the following table to congure the instrument.
Recommended settings
(Bold indicates a change from the factory default.)
Measurement target
Motor, solenoid,
choke coil, transformer, wiring
harness
For power
Contact, wiring harness,
connector, relay contact, switch
Conductive coating material,
conductive rubber
General resistance
measurement
Fuse, resistor, heater, wiring,
welding
Temperature
correction (p. 50)/
Temperature
conversion (p. 67)
TC
*1
-
*1
OVC
(p. 51)
OFF Lo
ON
OFF Lo
ON
Measurement current at
300mΩ range (p. 55)
Lo
Lo
1
2
3
4
5
6
7
8
Temperature rise test
(Motor, choke coil, transformer)
Automobile ground wire *1
For signal
Contact, wiring harness,
connector, relay contact, switch
2
∆T*
If the instrument is used to measure the resistance of a signal
contact, the contact status will be changed, because its open­circuit voltage and measurement current are both high. To measure a signal contact, use the RM3545.
OFF Lo
ON Hi (300mA)
9
10
Appx. Ind.
25
Checking the Measurement Target
*1
When the measurement target signicantly depends on temperature, use the temperature
correction function.
*2
The interval measurement function allows you to save a measured value every xed interval.
(p. 79)
IMPORTANT
If a measurement fails with the PrSEt (preset) delay setting, set a long enough
delay time. (p. 53)
26
2

Preparing for Measurement

Before using the instrument, be sure to see “Usage Notes” (p. 7).
Attaching the strap (p. 28)
Loading or replacing the batteries (p. 29)
Connecting the test leads (p. 30)
Connecting a Z2002 Temperature Sensor (p. 31)
Inspecting the instrument (p. 34)
Turning the power on (p. 32)
Measurement
Turning the power off (p. 32)
* If the instrument is not operated for a while, it will turn off automatically. (APS
function) (p. 33)
1
2
3
4
5
6
7
8
9
10
Appx. Ind.
27
Attaching the Strap

2.1 Attaching the Strap

Attaching the strap to the instrument allows you to use it with the strap around your neck. Follow the procedure below to attach the strap.
Attaching the strap
28
Loading or Replacing the Batteries

2.2 Loading or Replacing the Batteries

Before using the instrument for the rst time, load the eight alkaline batteries (LR6). Before measurement, check that the instrument has sufcient remaining battery
power. If the remaining battery level is low, replace the batteries. See the battery indicator to check the remaining battery level. (p. 10)
Preparations
• Alkaline battery (LR6) × 8
Remove the test leads.
2
Remove the battery cover on
3
the back of the instrument.
Turn the power off.
1
(Press the [POWER] key to turn the entire display off.)
Load eight batteries (LR6).
4
(Be careful of their polarity.)
1
2
3
4
5
6
7
8
Reattach the battery
5
cover on the back of the instrument.
9
10
Appx. Ind.
29
Connecting the Test Leads

2.3 Connecting the Test Leads

Use the included L2107 Clip Type Leads or select from our wide range of optional test leads. For more information on the lead options, see “Options” (p. 3).
Test leads
(Example: L2107 Clip Type Leads)
The V mark indicates a SENSE lead.
SENSE SOURCE
SOURCE SENSE
Red
Orange
Blue
Black
Red
SENSE SOURCE
SENSE SOURCE
Black
To clip a thin wire (Use the edge portion of the jaws.)
Connect the test leads to the instrument. Connect the four terminals: SOURCE (A and B) and SENSE (A and B).
30
To clip a thick wire (Use the base, non-serrated portion of the jaws.)
Black Red
SOURCE
SENSE
RedBlack
Connecting the Z2002 Temperature Sensor (When Using TC or ΔT)

2.4 Connecting the Z2002 Temperature Sensor (When Using TC or ΔT)

Connect the Z2002 Temperature Sensor to the TEMP.SENSOR terminal.
1
Connection method
Fully insert the jack.
2
TEMP.SENSOR terminal
3
4
5
6
7
8
9
10
Appx. Ind.
31
Turning the Power On/Off

2.5 Turning the Power On/Off

Turning the power on

Press the [POWER] key to turn the power on. Hold the key down until the entire display turns on.
Entire display lit
A self-test is started. The model name and version number are displayed during the self-test.
If an error occurs during the self-test
[POWER] key
Measurement screen

Turning the power off

Press the [POWER] key to turn the power off. Hold the key down until the entire display turns off.
Entire display off
IMPORTANT
When the instrument is turned on again, it starts up with the previous state used immediately before turning it off.
32
The error is displayed. (p. 114)
[POWER] key
Turning the Power On/Off

Automatic power off with auto power save (APS)

When the instrument is not being used, the APS function automatically turns it off to reduce battery consumption.
APS function ON
IMPORTANT
• During an interval measurement, the APS function automatically turns OFF. When the interval measurement ends, the APS function automatically turns ON.
• When the USB is connected, the APS function automatically turns OFF. When the USB is disconnected, the APS function automatically turns ON.
Lit Blinking
If no key is operated for 10 minutes or the instrument is in a measurement error state continuously, the APS indicator starts blinking.
Then, when a specic
time elapses after the start of blinking, the instrument automatically turns off.
1
2
3
4
5

Disabling auto power save (APS)

To disable the APS function, press the [POWER] key while holding the [MEMORY] key down when the power is off. The setting of the APS function is not saved. When the instrument is turned on again, the APS function is enabled again.
When the power is off, while
2
holding down the
press the
The APS function is OFF
3
(The power is on and the APS indicator turns off.)
key.
key,
Not lit
Turn the power off (if it is on).
1
[POWER] key
6
7
8
9
10
Appx. Ind.
[MEMORY] key
33
Pre-measurement Inspection

2.6 Pre-measurement Inspection

Before using the instrument, inspect it to verify that no damage has occurred during
storage or transportation and it operates normally. If you nd any damage, contact
your authorized Hioki distributor or reseller.
Instrument and peripheral checking
Inspection item Action
Is there any damage or a crack in the instrument? Are the internal circuits exposed?
Is there any dust or contamination, such as pieces of metal, on any terminals?
Is the test lead coating broken or is the metal exposed?
Power-on checking
Inspection item Action
Is the remaining battery power sufcient? The
Is anything missing from the screen? Turn the power on to make sure that the entire
When you turn the power on, does the entire display turn on and then the model name and a measurement screen appear on the screen?
If any damage is found, do not use it. Return it for repair.
If dust or contamination is adhered to a terminal, clean the terminal with a swab or the like.
If the coating of a test lead is broken, the measured value may become unstable or have an error. Replace the damaged test lead.
indicator at the upper right of the display indicates the current status. If the indicator changes to , the remaining battery level is low. Replace the batteries as early as possible. If the battery level becomes too low to continue with measurement, the
starts blinking. Replace the batteries.
display turns on. (p. 22) If there is anything missing, return the instrument for repair.
If the screen does not behave like this, the instrument may be damaged internally. Return it for repair.
See: “10.1 Troubleshooting” (p. 108)
“Error display and actions” (p. 114)
34
3

Basic Measurement

Before measurement, be sure to see “Measurement precautions” (p. 12).
This chapter describes the basic operations for using the instrument.
• “3.1 Setting the Measurement Range” (p. 36)
• “3.2 Connecting the Test Leads to the Measurement Target” (p. 38)
• “3.3 Reading the Measured Value” (p. 39)
For information on how to customize measurement conditions, see “Customizing Measurement Conditions” (p. 43).
1
2
3
4
5
6
7
8
9
10
Appx. Ind.
35
Setting the Measurement Range

3.1 Setting the Measurement Range

Select a measurement range. Automatic range selection (the auto range) is also available.
IMPORTANT
When the auto range is used or the measurement range is set to 30mΩ or less, a maximum current of 1 A may constantly ow through the measurement target, and
a maximum power of approximately 2 W may be applied*. If there are any of the following concerns, depending on the level of the measurement current, select a range using a lower measurement current.
• The measurement target may melt (such as a fuse or inator).
• The measurement target may heat up, causing a change in resistance.
• The measurement target may be magnetized, causing a change in inductance. Within each of the measurement ranges, the power for the measurement target can be expressed by “resistance × (measurement current) is deviated, the power may reach the value of “open-circuit voltage × measurement current” at maximum. Before connecting the measurement target, be sure to check the measurement range.
* At the moment of connecting the measurement target, a maximum inrush current
of 5 A ows.
(Convergence time: Approximately 1 ms for pure resistance)
2
”. If the measurement range
Using the manual range
3mΩ ↔ 30mΩ ↔ 300mΩ ↔ 3Ω ↔ 30Ω ↔ 300Ω ↔ 3kΩ ↔ 30kΩ ↔ 300kΩ ↔ 3M
36
Ω
[][] key
Setting the Measurement Range
Using the auto range
Use the [AUTO] key to switch to the auto range. (The default setting is AUTO.) When the instrument is in the auto range mode, AUTO is lit.
(The auto range)
AUTO lit
1
2
3
[AUTO] key
Toggles the auto
range ON and OFF.
(The manual range)
Not lit
IMPORTANT
• When the range is manually changed in the auto range mode, the auto range is
automatically disabled and the manual range is enabled.
• If the comparator function is turned ON, the range is xed and cannot be
changed. To change the range, turn the comparator function OFF or change the range in the comparator setting.
• Depending on the measurement target, the auto range may become unstable. In
such a case, specify the range manually or increase the delay time. (p. 53) For the measurement accuracy of each range, see “(1) Resistance measurement accuracy” (p. 93).
4
5
6
7
8
9
10
Appx. Ind.
37
Connecting the Test Leads to the Measurement Target

3.2 Connecting the Test Leads to the Measurement Target

Example: Using the L2107
Example: Using the 9772
Example: Using the 9453 The SENSE terminals should be located inside the SOURCE terminals.
38
(Press)
SOURCE A SOURCE B
SENSE A SENSE B

3.3 Reading the Measured Value

Reading the Measured Value
The instrument displays a resistance value.
If a non-resistance value is displayed, see “Verifying measurement errors” (p. 40).
To convert the measured resistance value, see the following pages:
• “5.2 Performing Temperature Rise Test (Temperature Conversion Function (∆T))”
(p. 67)
• “5.3 Measuring the Length of a Conductor (Length Conversion Function)” (p. 69)
IMPORTANT
If the measured value has a negative sign (-), check the following:
• The SOURCE and SENSE lead connections are reversed.
→ Connect the leads correctly.
• After zero adjustment for a two-terminal measurement, the contact resistance has decreased.
→ Perform zero adjustment again.

Switching the display

Press and hold the [+] (VIEW) key to switch the type of information displayed on the upper right of the screen. (Temperature, no indicator, memory number (MEMORY No.)) The type of information displayed during measurements can be selected.
Temperature → no indicator → memory number (MEMORY No.)
1
2
3
4
5
6
7
8
Press the [+] (VIEW) key to display a selection screen.
Press and hold
9
10
Appx. Ind.
39
Reading the Measured Value

Verifying measurement errors

If a measurement is not performed correctly, the measurement error is displayed on the screen.
Out-of-range*
Current fault or not measured yet
The protection function is working
Fuse blown out
1
Indicates that the measurement or display range has been exceeded. If oF is displayed, the comparator judgment is “Hi”, and if -oF is displayed, the comparator judgment is “Lo”. In the same manner, oF is displayed when the temperature exceeds the measurement range during temperature measurement.
This screen is displayed in the following two cases. If “-----” is displayed, comparator judgment is not performed.
1. Measurement current fault* Current cannot be supplied to the SOURCE A or SOURCE B terminals.
2. No measurement has been performed after changing a measurement condition.
If an overvoltage is applied to a measurement terminal, the function for protecting the internal circuitry is activated in this instrument. If an overvoltage is accidentally applied, remove the test leads from the measurement target immediately. Measurement cannot be performed while the protection function is activated. In order to cancel the protection function, contact test lead A (red) to B (black) or turn the power off and on.
2
Z2002 Temperature Sensor not connected
40
Each SOURCE terminal of the instrument is equipped with a fuse to protect against overvoltage input. If an overvoltage is accidentally applied and a fuse is blown, replace the fuse. (p. 116)
Temperature cannot be measured as the Z2002 Temperature
Sensor is not connected. When TC or ∆T is not used, it is not
necessary to connect the Z2002 Temperature Sensor. If the temperature is not to be displayed, switch the display by pressing the [+] (VIEW) key.
Temperature calculation error
Reading the Measured Value
The Z2002 Temperature Sensor is not connected even when TC
or ∆T is ON, or oF is displayed for the temperature. Check the
connection of the Z2002 Temperature Sensor.
IMPORTANT
If the measurement target is connected to the SOURCE terminal, but a SENSE terminal has a bad contact, the displayed measured value may be unstable.
*1 Out-of-range detection function
Examples detected as out-of-range
Out-of-range detection Measurement examples
The measurement range is exceeded. 40m
The relative display (% display) of a measured value exceeds the display range (999.99%).
The A/D converter input range is exceeded during a measurement.
The calculation result cannot be displayed.
*2 Current fault detection function
Current fault examples
• The SOURCE A or SOURCE B probe is open.
• The measurement target has a broken wire (open-circuit work).
• The SOURCE A or SOURCE B wiring has a broken wire or a bad connection.
is measured in the 30mΩ range.
Ω
(+2400%) is measured with a reference value of
500
Ω
20Ω.
Such an error occurs, for example, if a high resistance is measured in an environment with external noise.
The calculation result for the length conversion function exceeds 999.99 km.
1
2
3
4
5
6
7
8
IMPORTANT
A wiring resistance exceeding the following value in each range causes a current fault, making the measurement impossible. In the 1 A measurement current range, reduce the resistance of the wiring and contact between the measurement target and test leads.
Range [Ω] 3m 30m 300m 3 30 300 3k 30k to 3M
Wiring and contact
resistance [
The values listed above, which is for reference, indicate resistance values between the SOURCE B and SOURCE A, not including the measurement target.
9
10
Appx. Ind.
]
Ω
0.5 10 100 2k 800 2k
41
Reading the Measured Value

Holding a measured value

The auto-hold function helps to verify a measured value. When the measured value becomes stable, the value is automatically held.
1
oFF → Auto-hold (A.HOLD) → Auto-memory (A.HOLD, A.MEMORY) → Interval (INTERVAL) → oFF
2
3
Release the test leads from the measurement target and contact the leads to the target again. The HOLD is released. You can also release the HOLD by changing the range or pressing the
[ESC] key.
Cancel
Apply
During measurement (during release from HOLD)
Not lit
During HOLD
Lit
[MODE] key

Memorizing a measured value

The memory function helps to verify a measured value later. It saves the displayed measured value.
[MEMORY] key
For more details about the memory function, see “7.1 Saving Data at Specied Time
(Manual Memory)” (p. 77).
42
Customizing Measurement
4
Conditions
Before measurement, be sure to see “Measurement precautions” (p. 12).
1
This chapter describes the functions useful to perform more sophisticated and accurate measurement.
• “4.1 Using Zero Adjustment” (p. 44)
• “4.2 Stabilizing Measured Values (Averaging Function)” (p. 49)
• “4.3 Compensating for Thermal Effects (Temperature Correction (TC))” (p. 50)
• “4.4 Compensating for Thermal EMF Offset (Offset Voltage Compensation Function: OVC Function)” (p. 51)
• “4.5 Setting the Delay Time for Measurement (Delay Function)” (p. 53)
• “4.6 Switching the Measurement Current (In the 300m
Range)” (p. 55)
Ω
2
3
4
5
6
7
8
9
10
Appx. Ind.
43
Using Zero Adjustment

4.1 Using Zero Adjustment

In the following cases, perform zero adjustment:
(A resistance of up to ±3%f.s. can be canceled for any range.)
• The measurement value is not cleared due to thermal EMF or other factors.
→ The measurement value will be changed to zero.
Accuracy is not affected by whether or not the zero adjustment is performed. The thermal EMF can also be canceled by using OVC. (p. 51)
• Four-terminal connection (called Kelvin connection) is difcult.
→ The residual resistance of the two-terminal connection wires will be canceled.
(p. Appx.24)
For instructions on how to perform zero adjustment correctly, see “Appx. 7 Zero Adjustment” (p. Appx.11).
Before zero adjustment
IMPORTANT
• When the ambient temperature changes or the test leads are replaced after zero
adjustment, perform zero adjustment again. If zero adjustment is difcult because
the Pin Type Lead 9465-10, 9772, or the like is used, use the standard Clip Type Lead L2107 to perform zero adjustment and then replace the lead with the Pin Type Lead.
• Perform zero adjustment for each range used. In the manual range mode, only the current range is adjusted to zero. In the auto range mode, all ranges are adjusted to zero.
• Zero adjustment values are held internally even if the instrument is power off, but they are not saved in the panel.
• When the offset voltage compensation (OVC) function is turned from ON to OFF or from OFF to ON, the zero adjustment is cleared. Perform zero adjustment again.
• When the measurement current is changed from Lo to Hi or from Hi to Lo, the zero adjustment is cleared. Perform zero adjustment again.
• When a lower resistance is measured after zero adjustment, the measured value will be negative. Example: 2m
is connected in the 300mΩ range and then zero adjustment is
Ω
performed.
→If 1m
is measured, -1mΩ is displayed.
Ω
44
Performing zero adjustment
Short the test leads.
1
L2107
Using Zero Adjustment
1
Correct
Align the V symbols on the clips.
SENSE
SOURCE
Red Black
9453 (Option)
9465 (Option)
Incorrect
SENSE
SOURCE
Connect Connect
Perform zero adjustment while the alligator clips are located outside and the lead bar is located inside.
SENSE
SOURCE SENSE
Red Black
SOURCE-BSENSE-A SENSE-B SOURCE-A
Contact to SENSE terminal
2
SOURCE
3
4
5
6
7
8
9454 Zero Adjustment Board (Option)
9772 (Option)
Contact to SENSE terminal
Contact to SOURCE terminal
9454 Zero Adjustment Board (Option)
Contact to SOURCE terminal
For the pin on the SENSE side, a line is attached to the base section.
Line
When performing zero adjustment, be sure that this line faces the same direction on all of the pins.
9
10
Appx. Ind.
45
Using Zero Adjustment
Conrm that the measured value is within ±3%f.s.
2
If no measured value is displayed, make sure that the test leads are connected correctly.
If the connection is correct If the connection is wrong
Press and hold the [0 ADJ] key to perform zero adjustment.
3
If it is difcult to press the key as the Zero Adjustment Board is used, press
the [0 ADJ] key before shorting the measurement lead. Zero adjustment is automatically performed after the measured value is stabilized.
(Zero adjustment in progress)
Blinking
[0 ADJ] key
Press and hold
46
After zero adjustment
4
Zero adjustment has succeeded
The buzzer sounds and the measurement screen appears.
Indicator ON Indicator OFF
Zero adjustment has failed
The buzzer sounds and [FAIL] appears. Then, the measurement screen appears.
Using Zero Adjustment
1
2
3
Zero adjustment failed
When zero adjustment cannot be performed, the measured value before zero adjustment already exceeds ±3% of the full scale of each range or the instrument is in a measurement error state. Perform zero adjustment with the correct wire connection again. If the resistance is too high (e.g., due to a self-made cable), zero adjustment cannot be performed. In such a case, try to minimize the wiring resistance. (p. 41)
IMPORTANT
• If zero adjustment fails in the auto range mode, the zero adjustment is cleared for all ranges.
• If zero adjustment fails in the manual range mode, the zero adjustment is cleared for the current range.
4
5
6
7
8
9
10
Appx. Ind.
47
Using Zero Adjustment
Clearing zero adjustment
When the power is off, while holding the [0 ADJ] key, press the [POWER] key to clear the zero adjustment for all ranges.
Turn the power off (if it is on).
[POWER] key
[0 ADJ] key
48

Stabilizing Measured Values (Averaging Function)

4.2 Stabilizing Measured Values (Averaging
Function)
This function averages the measurement values in order to display a single value. It
helps to stabilize uctuations in the measured values.
oFF (factory default) → 2 → 5 → 10 → 20
1
2
3
4
5
6
The averaging frequency can also be changed with .
Changes the
averaging frequency.
([AVG] key)
Cancel
Apply
7
8
9
10
Appx. Ind.
49
Compensating for Thermal Effects (Temperature Correction (TC))

4.3 Compensating for Thermal Effects (Temperature Correction (TC))

This function converts a measured resistance value, based on the reference temperature, to display the converted value. For the principles of temperature correction, see “Appx. 4 Temperature Correction Function (TC)” (p. Appx.4). To perform temperature correction, connect the Z2002 Temperature Sensor to the TEMP.SENSOR terminal on the side of the instrument. Before connecting the sensor, be sure to read “2.4 Connecting the Z2002 Temperature Sensor (When Using TC or
T)” (p. 31).
Δ
oFF (factory default) → TC → ∆T
1
Use the key to select TC.
(Reference temperature setting)
2
Reference temperature setting
(Temperature coefcient setting)
3
4
Apply and move to the measurement screen.
IMPORTANT
If “t.Err” is displayed, the Z2002 Temperature Sensor may not be connected, or oF is displayed for the temperature. Check the connection of the Z2002 Temperature Sensor.
50
[TC/∆T] key
Changes values.
Cancel
Apply
Moves digits.
Temperature
coefcient setting
Compensating for Thermal EMF Offset (Offset Voltage Compensation Function: OVC Function)

4.4 Compensating for Thermal EMF Offset (Offset Voltage Compensation Function: OVC Function)

This function automatically compensates for an offset voltage caused by thermal EMF or an internal offset voltage. (OVC: Offset Voltage Compensation) See: “Appx. 6 Effect of Thermoelectromotive Force (Thermal EMF)” (p. Appx.8)
1
2
The function uses the resistance value measured when a measurement current ows,
R
and that measured when no measurement current ows,
P
resistance value
R
-
R
.
P
Z
oFF (factory default) ↔ on
Press and hold
Toggles the OVC function ON/OFF.
([AVG (OVC)] key)
R
, to display the actual
Z
Cancel
Apply
3
4
5
6
7
8
9
10
Appx. Ind.
The OVC function can also be toggled ON/OFF with .
51
Compensating for Thermal EMF Offset (Offset Voltage Compensation Function: OVC Function)
IMPORTANT
• When the offset voltage compensation function is ON (the OVC indicator is lit), the measured value will be slow to refresh.
• The OVC function cannot be used in the 3k automatically turned OFF.
• When the offset voltage compensation function is changed, the zero adjustment function is cancelled.
• When the measurement target has a high inductance, it is necessary to adjust the delay time. (p. 53) Start with a longer delay time than necessary, and decrease the time gradually, watching the measured value.
• If the measurement target has a low heat capacity, the offset voltage compensation function may have no effect.
range or higher. The function is
Ω
52
Setting the Delay Time for Measurement (Delay Function)

4.5 Setting the Delay Time for Measurement (Delay Function)

This function adjusts the time for measurement to stabilize by inserting a waiting period after use of the OVC or the auto range function to change the measurement current. When this function is used, the instrument waits for its internal circuitry to stabilize before starting measurement, even if the measurement target has a high reactance component. The PrSEt (preset value) depends on the range used and the offset voltage compensation function.
Preset OVC delay value (factory default) (Unit: ms)
1
2
3
Measurement
current
Lo
Hi 300m
Range Delay time
3m
to 30m
Ω
300m
30
Ω
to 3
Ω
to 300
Ω
Ω
Ω
Ω
200
50
30
200
4
5
6
7
8
9
10
Appx. Ind.
53
Setting the Delay Time for Measurement (Delay Function)
 
 
−−=
V
O
IR
n
R
L
t 1l
PrSEt (preset) → 10 ms → 30 ms → 50 ms → 100 ms → 300 ms → 500 ms → 1000 ms
Press the [] (DELAY) key to display a selection screen.
The delay time can also be specied with .
Delay time guideline
• If the measurement target, for example, is an inductor that takes longer to stabilize after applying a measurement current, and it cannot be measured with the initial delay (preset), adjust the delay. Set the delay time to approximately ten times the following calculation so that the reactance component (inductance or capacitance) does not affect the measurement.
• Start with a longer delay time, and decrease the time gradually, watching the measured value.
• As the delay is longer, the measured value display is slower to refresh.
54
Press and hold
L
: Measurement target inductance
Measurement target resistance + lead wire resistance +
R
:
contact resistance
I
: Measurement current (see: “Accuracy” (p. 94))
V
: Open-circuit voltage (see: “Accuracy” (p. 94))
O
Cancel
Apply

Switching the Measurement Current (In the 300mΩ Range)

4.6 Switching the Measurement Current (In the 300m
With this instrument, the measurement current for the 300mΩ range can be changed to 300 mA (100 mA at the time of shipment from the factory). This makes it possible to measure large current wiring under conditions that are similar to the actual usage conditions. It is also useful when performing measurement in an environment with external noise.*
IMPORTANT
• When the measurement current is set to 300 mA, a larger amount of power is consumed for the measurement target.
• If highly accurate measurement is required, use a measurement current of 100 mA.
• When the measurement current is changed, the zero adjustment values are cleared.
Range [Ω] 3m 30m 300m 3 30 300 3k 30k 300k 3M
Measurement
current [A]
Range)
Ω
1
1 300 m 100 m 10 m 1 m 100 µ 5 µ 500 n
1
2
3
4
5
6
7
8
9
10
Appx. Ind.
55
Switching the Measurement Current (In the 300mΩ Range)
Turn the power off (if it is on).
1
Make sure that the power
2
is off, and holding down the
, press the key.
When Lo is selected
3
(100 mA)
Not lit
[POWER] key
[] key
Use the or keys
to toggle.
When Hi is selected (300 mA)
4
Apply and move to the measurement screen.
Blinking
Cancel and move to the measurement screen. Apply and move to the measurement screen.
When measurement is performed with the 300 mA measurement current, the 300 mA indicator lights up.
56
Switching the Measurement Current (In the 300mΩ Range)
*1 When measuring resistance for connection sections (e.g., connector contact, welded section, caulked section, screw-secured section) through which large
current ows, such as power supply cables and ground cables, it is desirable that
measurement be performed using the maximum current, as far as possible, that can
actually ow through those sections. The following explains the reasons:
• Even in a connection completely free from abnormality, a relatively high resistance may be indicated at a lower measurement current.
This is due to an oxide lm that is generated around the contact while it is not used.
• Even when it is judged that no abnormality is found using a small current, the
connection sections are occasionally melted when a large current ows.
This problem occurs due to the Joule heat generated by a large current when a high resistance area is created locally.
1
2
3
4
5
6
7
8
9
10
Appx. Ind.
57
Switching the Measurement Current (In the 300mΩ Range)
58
Judgment and Conversion
5
Functions
This chapter describes the measured value judgment and conversion functions.
1
“5.1 Judging Measured Values (Comparator Function)” (p. 60)
“5.2 Performing Temperature Rise Test (Temperature Conversion Function (∆T))”
(p. 67) “5.3 Measuring the Length of a Conductor (Length Conversion Function)” (p. 69)
2
3
4
5
6
7
8
9
10
Appx. Ind.
59
Judging Measured Values (Comparator Function)

5.1 Judging Measured Values (Comparator Function)

This function judges a measured value to be Hi (measured value > upper limit), IN
(upper limit ≥ measured value ≥ lower limit), or Lo (lower limit > measured value) against the set reference value, or upper or lower limit values.
• The judgment result can be veried on screen, with the buzzer (factory default is
OFF), and the L2105 LED Comparator Attachment (option).
• There are two different judgment methods available: ABS mode and REF% mode.
IMPORTANT
• If ΔT or length conversion function is turned ON, the comparator function
automatically turns OFF.
• If the comparator function is set to ON, it becomes impossible to change the range (including the auto range). To use the auto range or change the range, set the comparator function to OFF, and then use the [AUTO] key or [][] keys.
• If the comparator function is set to ON, the interval memory function becomes
unavailable.
60
Judging Measured Values (Comparator Function)
Before using the comparator function
• If no measured value appears, the comparator judgment is displayed as follows:
If a measurement error occurs, judgment is not performed. (p. 40)
Display Comparator judgment display (COMP lamp)
oF Hi
-oF Lo
----- No judgment
• If the power is turned off during a setting process, any setting changes are lost and the previous values remain valid. To apply the changes, press the [ENTER] key.
ABS (absolute value judgment) mode
Set the upper and lower limit values for judgment, as absolute values.
Example: Upper limit value ......100.00m
Lower limit value ......80.00m
Upper limit value [Ω]
Ω
Ω
(100.00m
)
Ω
1
2
3
4
5
REF% (relative value judgment) mode
Set the allowable % of a reference value to determine the upper and lower limit values for judgment. In REF% mode, the upper and lower limit values cannot be set separately.
Example: Reference value.........................12.000k
Upper and lower limit values......±1.00%
Lower limit value [
Upper limit value [%]
Reference value [
Lower limit value [%]
Ω
Ω
]
(80.00m
)
Ω
6
7
8
Ω
9
(12.120k
]
(12.000k
(11.880k
)
Ω
)
Ω
)
Ω
10
Appx. Ind.
61
Judging Measured Values (Comparator Function)
Turning the comparator function ON/OFF
oFF (factory default) → ON (ABS mode) → ON (REF% mode)
oFF
ABS mode (p. 63)
[COMP] key
Upper limit
value
Lower
limit value
Cancel
Apply (To continue with the reference value and upper and lower limit
setting process, do not press this
key.)
REF% mode (p. 64)
Reference
value
62
Allowable %
Judging Measured Values (Comparator Function)

Judging based on upper and lower limit values (ABS mode)

Upper and lower limit value setting
Use the key to change
1
the comparator to ABS mode
(p. 62).
2
Change the range.
Unit of upper and lower limit values
Lower limit
value
Upper and lower
limit value setting
3
4
Upper limit
value
Apply the setting and
move to the measurement screen.
1
2
3
4
Change the
range
([][] keys)
5
Changes values.
Cancel
6
Apply
Changes settings, digits.
7
IMPORTANT
Any setting changes cannot be applied when: upper limit value < lower limit value.
8
9
10
Appx. Ind.
63
Judging Measured Values (Comparator Function)

Judging based on a reference value and allowable range (REF% mode)

In REF% mode, a measured value is displayed as a relative value. The upper and lower limit values cannot be set separately.
Relative value =
Measured value
Reference value
Reference value and allowable % setting
Use the key to change
1
the comparator to REF%
mode. (p. 62)
2
Change the range.
Unit of reference value
3
4
Reference
value
Apply the setting
and move to the measurement screen.
Upper and
lower limit (%)
Value setting
-1
× 100[%]
Change the
range.
([][] keys)
Changes values.
Cancel
Apply
Changes settings, digits.
IMPORTANT
The settings cannot be conrmed when the reference value is set to 0.
64
Judging Measured Values (Comparator Function)

Verifying a judgment with a sound (judgment sound function)

This function sounds the buzzer, based on a comparator judgment result.
oFF (factory default) → Hi → in → Lo → Hi-Lo → ALL1 → ALL2
(Beep sound setting)
[COMP] (BEEP SET) key
Changes beep sound.
If a setting other than OFF is selected, the appropriate
comparator is displayed and
the corresponding sound is
actually output.
Cancel
Apply the setting
and move to the measurement screen.
Press and hold
Cancel
Apply
1
2
3
4
5
6
7
8
The judgment sound can also be selected with .
9
10
Appx. Ind.
65
Judging Measured Values (Comparator Function)
JAPAN

Verifying a judgment on a handheld device (L2105 LED Comparator Attachment option)

By connecting an L2105 LED Comparator Attachment to the COMP.OUT terminal, you can obtain the judgment result on a handheld device. The lamp lights up in green
for the IN judgment, and it lights up in red for either Hi or Lo judgment.
Before connecting the L2105 LED Comparator Attachment, be sure to read “Usage
Notes” (p. 7).
Installing the L2105 LED Comparator Attachment
Install the L2105 LED Comparator Attachment wherever you desire.
Example: Install the L2105 LED Comparator Attachment to the test lead, by using the tie band
or spiral tube attached with it.
L2107 Clip Type Lead
L2105 LED Comparator Attachment
Spiral tube (small)
Spiral tube (large)
Tie band
Connecting the L2105 LED Comparator Attachment to the instrument
Connect the L2105 LED Comparator Attachment to the COMP.OUT terminal. Insert the lamp all the way to the back.
66

Performing Temperature Rise Test (Temperature Conversion Function (∆T))

5.2 Performing Temperature Rise Test
(Temperature Conversion Function (∆T))
This function converts the change in the winding resistance into a temperature rise
value, based on the temperature conversion principle (p. Appx.7). It can be used to
estimate the temperature of the motor or the inside of the coil while the power is cut off based on the change in the winding resistance.
IMPORTANT
• To perform temperature conversion, connect the Z2002 Temperature Sensor to the TEMP.SENSOR terminal on the side of the instrument. Before connecting the sensor, be sure to read the following. See: “2.4 Connecting the Z2002 Temperature Sensor (When Using TC or ΔT)”
(p. 31)
• When ΔT is set to ON, the comparator function or TC cannot be turned ON. If length conversion function is set to ON, ΔT automatically turns OFF.
• If “t.Err” is displayed, the Z2002 Temperature Sensor may not be connected,
or oF is displayed for the temperature. Check the connection of the Z2002 Temperature Sensor.
1
2
3
4
5
(1) After the motor and coil are stabilized at room temperature, measure the
resistance ( values to the instrument. (p. 68)
(2) Disconnect the test lead from the measurement target.
(3) After turning off the power, reconnect the test lead to the measurement target and
then measure the temperature rise value (∆ (It can be measured easily if the interval memory function is used.) (p. 79)
(4) Draw a line by connecting the collected temperature data (∆
the maximum temperature rise value (∆
t
∆
1
t
∆
t
∆
Initial temp.
R
) and instrument ambient temperature (
1
t
).
Temp.
2
n
t
∆
(1) (2)
Power
On
(4)
Off
t
to ∆
1
1 2 3
t
), and then input these
1
t
) at the preset intervals.
n
t
to ∆
t
), and estimate
1
n
(3)
. . . . . . . . . . .
n
6
7
8
9
10
Appx. Ind.
Time
67
Performing Temperature Rise Test (Temperature Conversion Function (∆T))
oFF (factory default) →TC→∆T
Use the key to select ∆T.
1
(Initial temperature
2
Set the temperature plus/minus sign + (displayed as 0) / -.
Lit
(Initial resistance value
3
Changes decimal point position, units.
Set the initial resistance value.
(Temperature coefcient reciprocal
4
Set the reciprocal (k) of the temperature coefcient.
5
Apply the setting and move to
the measurement screen.
t
setting)
1
Set the initial
temperature.
R
setting)
1
k
setting)
[TC/∆T] key
Changes values.
Cancel
Apply
Changes settings, digits.
Guideline for
IEC 60034 recommends the following:
• Copper: k = 235
• Aluminum: k = 225
Reference: “Appx. 5 Temperature
Conversion (ΔT) Function” (p. Appx.7)
k
Measurement screen
68
(∆T ON)
°C display
If you press the [MEMORY] key during
setting,
t
and
1
R
are set to the values
1
measured immediately before setting.
Measuring the Length of a Conductor (Length Conversion Function)

5.3 Measuring the Length of a Conductor (Length Conversion Function)

This function converts a resistance value to a length to display the length of the
measurement target (such as a conductor). Press and hold the [TC/∆T] (LENGTH) key to display the ON/OFF setting screen for the length conversion function.
1
2
Length [m] =
Example: When the measured resistance is 15
Length [m] =
IMPORTANT
When length conversion function is set to ON, the comparator cannot be turned
ON. If ΔT is set to ON, length conversion function automatically turns OFF.
Measured resistance [
Per meter resistance [Ω/m]
15 [
]
Ω
0.2 [Ω/m]
= 75 [m]
]
Ω
and per meter resistance is 200mΩ/m
Ω
3
4
5
6
7
8
9
10
Appx. Ind.
69
Measuring the Length of a Conductor (Length Conversion Function)
oFF ↔ ON (per meter resistance value setting)
Press and hold the (LENGTH)
1
key to select LENGTH.
(Per meter resistance value setting)
2
Press the [TC/∆T] (LENGTH) key to display a selection screen.
Changes decimal point position, units.
Move to the value setting.
3
Press and hold
• Changes decimal point position, units.
• Changes values.
Cancel
Apply
4
Apply the setting and move
to the measurement screen.
Measurement screen
IMPORTANT
The display format (decimal point position and unit) automatically changes depending on the range and setting. For details, see the instrument specications (p. 101). For some ranges, oF is always displayed, because the display range is exceeded,
depending on the setting.
70
Value setting
(Length conversion function ON)
Meter display
Moves digits.
Panel Save and Load
6
(Saving and Loading Measurement Conditions)
The panel save function can save up to nine sets of measurement conditions displayed at the time of the panel save operation, and the panel load function can load any set of the measurement conditions at any time. The panel data is retained even if the instrument is turned off.
• Press the [PANEL] key to display the panel load screen. (p. 73)
• Press and hold the [PANEL] (SAVE/CLEAR) key to display the setting screen for the panel save/clear function. (p. 72, p. 74)
Conditions that can be saved by panel save: Resistance measurement range, averaging, delay, comparator, judgment sound, temperature conversion (ΔT), measurement current change, length conversion, temperature correction (TC), OVC, and memory mode
1
2
3
4
5
6
7
1
2
Apply ([ENTER] key)
Panel load setting ([PANEL] key) Panel save setting (Press and hold the [PANEL] (SAVE/
CLEAR) key)
8
9
10
Appx. Ind.
71
Saving Measurement Conditions (Panel Save Function)

6.1 Saving Measurement Conditions (Panel Save Function)

This function saves the set of current measurement conditions.
Press and hold the (SAVE/
1
CLEAR) key.
Select SAVE.
2
[PANEL] (SAVE/CLEAR) key
Press and hold
or
SAVE ↔ CLEAR toggle
Select a panel number.
3
Moves items.
• Select SAVE.
• Select a panel number.
Cancel
Execute
or
4
IMPORTANT
• If the already saved panel number is selected and the [ENTER] key is pressed, the existing contents are overwritten.
• Zero adjustment values are not saved.
Save and move to the measurement screen.
72
Moves items.
Change the panel number. (1 to 9)
Loading Measurement Conditions (Panel Load Function)

6.2 Loading Measurement Conditions (Panel Load Function)

This function replaces the current measurement conditions with a saved set of measurement conditions.
Press the key.
1
1
2
Select a panel number.
2
Change the panel
or
number. (1 to 9)
[PANEL] key
Cancel
Apply and move to the
3
IMPORTANT
• If the number of a panel that is not saved is selected and the [ENTER] key is pressed, a warning sound is output.
• Zero adjustment values are not read. Zero adjustment can be performed both before and after panel loading.
• If PANEL No.PrSEt is selected, the measurement conditions are initialized. (Preset load) Also see “8.3 Initializing (Reset)” (p. 91) for initialization.
• The panel number is not displayed on the measurement screen.
The measurement conditions are loaded and move to the measurement screen.
measurement screen.
3
4
5
6
7
8
9
10
Appx. Ind.
73
Clearing the Contents of a Panel

6.3 Clearing the Contents of a Panel

Press and hold the (SAVE/
1
CLEAR) key.
Select CLEAR.
2
[PANEL] (SAVE/CLEAR) key
Press and hold
SAVE ↔ CLEAR toggle
Moves items.
Select a panel number.
3
Moves items.
Change the panel number. (1 to 9)
4
Delete the panel and then move to the measurement screen.
IMPORTANT
Once deleted, the contents of the panel cannot be restored.
• Select CLEAR.
• Select a panel number.
Cancel
Execute
74
Memory Function (Saving and
7
Exporting Measurement Data to a PC)
What the memory function does
This function can save a value currently being measured. The saved data is held even if the instrument is turned off. There are three different saving methods:
• Manual memory (up to 1,000 entries) (p. 77)
• Auto memory (up to 1,000 entries) (p. 78)
• Interval memory (up to 6,000 entries) (p. 79)
• Data to be saved in the memory (Some items cannot be displayed only with the instrument.)
Manual memory, auto memory
Interval memory
There are two different methods to view saved data.
• Displaying on the instrument (memory display function) (p. 81)
• Exporting to a PC (in USB mass storage mode) (p. 86)
Memory layout
Date and time, measurement value, temperature, resistance measurement range, averaging, comparator, changed measurement current, temperature correction (TC), and OVC
Start date and time, measurement value, temperature, resistance measurement range, averaging, temperature
correction (TC), temperature conversion (∆T), and interval
1
2
3
4
5
6
7
(Maximum number of entries) Manual or auto memory: 100 entries per block, a total of 1,000 entries for all blocks Interval memory: A total of 6,000 entries for all blocks
* To save up to the maximum amount of memory shown above, all blocks should be used for the
manual or auto-memory, or for the interval memory only. If both types of memory blocks exist, saving up to the maximum is not possible.
Memory block (10 blocks)
8
9
(The number of memory in each block is not xed.)
10
Appx. Ind.
75
Memory blocks
In manual or auto memory mode, the block to save data can be selected. In interval mode, data is saved in an available free block when the interval starts. In interval
mode, the memory block to save data cannot be specied.
Changing the memory block
1
Press and hold the []
(M.Block SEL) key.
Select a block.
2
or
Number of saved entries
3
Apply and move to the measurement screen.
Changes blocks.
Number of entries that can be saved
Press and hold
Press the [](M.Block SEL) key to display a selection screen.
Cancel
Apply and move to the
measurement screen.
No free memory availableNo data saved
76
Saving Data at Specied Time (Manual Memory)
7.1 Saving Data at Specied Time (Manual
Memory)
Press the [MEMORY] key to save the displayed measured value.
[MEMORY] key
1
2
3
4
5
During measurement
IMPORTANT
• If a measurement value being held is saved, the memory number to be used is displayed. When the hold is released, the next available memory number appears.
• The memory number is incremented by one each time data is saved, and cannot
be specied. If data is accidentally saved, clear the last data item saved (latest
data). See: “7.5 Clearing Measurement Data (Memory Clear)” (p. 82)
The memory No. blinks (during saving of data), and the next available memory number is displayed.
6
7
8
9
10
Appx. Ind.
77
Saving Data Automatically When Measured Values Stabilize (Auto-Memory)

7.2 Saving Data Automatically When Measured Values Stabilize (Auto-Memory)

When a measured value stabilizes, the value is automatically held and saved.
1
oFF→ Auto-hold (A.HOLD) →Auto-memory (A.HOLD, A.MEMORY) → Interval (INTERVAL) → oFF
2
Cancel
Apply
[MODE] key
3
During measurement
Lit
IMPORTANT
The memory number is incremented by one each time data is saved, and cannot be
specied. If data is accidentally saved, clear the last data item saved (latest data).
See: “7.5 Clearing Measurement Data (Memory Clear)” (p. 82)
During auto-hold Hold released
The memory No. blinks (during saving of data), and the memory number used to
Lit
save data is displayed.
Release the test leads from the measurement target and then contact the leads to the target again. The next measurement is started. (The hold state can also be released by changing the range or pressing the [ESC] key.)
The next memory No. is displayed during measurement
78
Saving Data at Fixed Intervals (Interval Memory Function)

7.3 Saving Data at Fixed Intervals (Interval Memory Function)

This function can save measured data at specied intervals. Using this function together with ∆T makes it easy to perform a temperature rise test (for estimation of
power-off temperature).
Setting the interval memory
1
oFF → Auto-hold (A.HOLD) → Auto-memory (A.HOLD, A.MEMORY) → Interval (INTERVAL) → oFF
2
(Interval time setting)
Set the interval time.
1
2
3
4
5
6
Time that data can be saved. (Example: 01:20 indicates one hour and 20 minutes.)
IMPORTANT
The time that data can be saved varies depending on the number of memory units already saved and the set interval time.
[MODE] key
7
Cancel
8
Apply
9
10
Appx. Ind.
79
Saving Data at Fixed Intervals (Interval Memory Function)
Measuring the interval memory
Interval stand-by
Lit
Press and hold
During measurement
Blinking
Press the [MEMORY] key to start/stop the interval measurement.
Press and hold
Elapsed time
IMPORTANT
• When the memory becomes full, the interval measurement automatically stops. To start an interval measurement again, clear the memory.
• When an interval measurement starts, data is automatically saved in an available free block. The memory block used cannot be changed. When the interval measurement stops, the used memory block displays FULL.
• When the interval memory function is set to ON, the comparator function cannot be used. When the comparator is set to ON, the interval memory function cannot be used.
• If “-----” (or other measured value error) is displayed after pressing the [START] key, saving of data does not start. After a measured value is displayed, saving of data starts.
80
Displaying Saved Measurement Data (Memory Display Function)

7.4 Displaying Saved Measurement Data (Memory Display Function)

1
Comparator result
Indicator
Range
Measured value
Changes memory numbers.
Changes values.
2
3
4
5
[READ] key
6
7
8
Moves digits.
Returns to the measurement screen.
9
10
Appx. Ind.
81
Clearing Measurement Data (Memory Clear)

7.5 Clearing Measurement Data (Memory Clear)

There are three different methods to clear saved measurement data.
• Clearing only the last data (latest data) saved in a block
• Clearing an entire block
• Clearing all
Clearing only the latest data saved in a block (block selectable) See: p. 83
Clearing an entire block of saved data See: p. 84
[READ (MEMORY CLEAR)] key
Press and hold
Clearing all data saved in the memory See: p. 85
(All data can also be cleared by turning the power off, and then turning it on while holding down the [READ] key.)
82
Clearing Measurement Data (Memory Clear)
Clearing only the latest data saved in a block (block selectable)
This method clears only the latest data saved in a block. This method is useful, for example, when data is accidentally saved in manual or auto-memory mode.
Press and hold the key.
1
2
[READ (MEMORY CLEAR)] key
Press and hold
1
2
3
4
or
Selected block
3
or
4
Clear the latest data from the selected block and move to the measurement screen.
Select LASt.
Proceed to block selection.
Memory number
for the latest data
Select the block containing the data to be cleared.
Changes items.
Moves items.
Cancel
5
Clear
6
7
8
9
10
Appx. Ind.
83
Clearing Measurement Data (Memory Clear)
Clearing an entire block containing saved data
This method clears an entire block containing saved data.
1
Press and hold the key.
[READ (MEMORY CLEAR)] key
Press and hold
or
Selected block
2
or
3
Select bLoC.
Proceed to block selection.
Total number of saved data entries
Select the block to be cleared.
Clear the selected block and move to the measurement screen.
Changes items.
Moves items.
Cancel
Clear
84
Clearing Measurement Data (Memory Clear)
Clearing all saved data
This method clears all data saved in the instrument.
Press and hold the key.
1
1
2
or
3
To delete all data as in the above method, press the [POWER] key while holding the [READ] key down when the power is off.
Select ALL.
Clear all data and move to the measurement screen.
[READ (MEMORY CLEAR)] key
Press and hold
Changes items.
Cancel
Clear
2
3
4
5
6
7
8
9
10
Appx. Ind.
85
Exporting Saved Measurement Data to a PC (USB Mass Storage Mode)

7.6 Exporting Saved Measurement Data to a PC (USB Mass Storage Mode)

Measured values stored in the memory are organized as les in CSV format.
Data saved in the internal memory can be exported to a PC, using USB mass storage mode.
Connecting a USB cable
Be careful of the orientation of the USB cable plugs and connect the plugs to the instrument and PC.
Removing the USB cable
To remove the USB cable connected to the instrument while the PC is running, use
the “Safely Remove Hardware” icon on the PC.
86
Exporting Saved Measurement Data to a PC (USB Mass Storage Mode)
Copying a le to the PC
Open [Start] → [My Computer] → [RM3548].
1
A memory block name is used as a le name.
Example: When the instrument memory is recognized as RM3548 (Z:)
Copy a le to the PC and open the le with a text editor (such as Notepad)
2
or spreadsheet program (such as Excel).
If the interval measurement is interrupted, the following end status is indicated at the end
of the le.
• When there is no free memory available and no more data can be saved: MemoryFull
• When there is no remaining battery power and the power is turned off: BatteryLow
Example: When Excel is used to open the le
1
2
3
4
5
6
7
File created in interval memory mode File created in auto- or manual memory mode
IMPORTANT
• No measurements or settings can be made during USB connection. They also cannot be made from the PC.
• The memory data is made read-only. No le can be changed or deleted from the
PC. To delete a le, remove the USB cable and use the memory clear function on
the instrument. (p. 82)
8
9
10
Appx. Ind.
87
Exporting Saved Measurement Data to a PC (USB Mass Storage Mode)
Changing the decimal point and delimiter characters for CSV les
You can select from three pairs of decimal point and delimiter characters to be used for CSV les.
Make sure that the power is off, and while holding down the [MODE] key, press the
[POWER] key.
Decimal point and delimiter characters for CSV les
Type
Type1 . (period) , (comma) .csv
Type2 , (comma) (tab) .txt
Type3 . (period)
While holding down the
2
key, press the
the power is off.
Decimal
point
Delimiter Extension
(space
character)
1
key when
Turn the power off (if it is on).
3
[POWER] key
Changes type.
.txt
[MODE] key
Changes type.
tyPE1 (factory default) → tyPE2 →
tyPE3
4
Apply and move to the measurement screen.
The type can also be changed with .
88
Cancel
Apply
8

System Settings

8.1 Displaying the Date and Time Verication
Screen
Press and hold the [−] (DATE) key to verify the date and time.
1
Press and hold the key.
2
3
Month Year
Time Day
Returns to the measurement screen.
[−] (DATE) key
Press and hold
1
2
3
4
5
6
7
8
9
10
Appx. Ind.
89
Setting the Clock

8.2 Setting the Clock

Set the date and time. To display the time setting screen, press the [POWER] key while holding the [−] key down when the power is off.
Turn the power off (if it is on).
1
While holding down the
2
key, press the key when
the power is off.
3
Time
Moves digits, items.
Changes values.
4
Month
Apply and move to the measurement screen.
Year
Day
[POWER] key
[−] key
Changes values.
Moves elds.
Cancel
Apply and move to the measurement screen.
90

8.3 Initializing (Reset)

Initializing (Reset)
This function provides the following three types of reset:
• Memory clear: Initializes the memory that stores measurement data. (This type of initialization is possible even if the power is on. (p. 82))
Turn the power off (if it is on).
• Reset (to reset the current measurement conditions): Resets data and settings other than the panel data, saved measurement data, and the clock settings to the factory defaults. (This type of initialization is possible even if the power is on. (p. 73))
Turn the power off (if it is on).
1
2
3
4
5
6
7
• System reset: Resets all settings other than the clock settings, including the panel data and saved measurement data, to the factory defaults.
Turn the power off (if it is on).
8
9
10
Appx. Ind.
91
Initializing (Reset)

Default settings

Function Available settings
Measurement range switch
Measurement range
Display mode None/Memory No./Temperature
Zero adjustment OFF/ON OFF (p. 44)
Averaging oFF/2/5/10/20 oFF (p. 49)
Temperature correction, temperature conversion (ΔT)
Offset voltage compensation (OVC)
Delay
range
300m
Ω
measurement current switch
Comparator oFF/ ON (ABS mode)/ ON (REF% mode) oFF (p. 60)
Judgment sound oFF/Hi/in/Lo/Hi-Lo/ALL1/ALL2 oFF (p. 65)
Length conversion oFF/ON oFF (p. 69)
Hold memory mode
Memory block A/b/C/d/E/F/G/H/J/L A (p. 76)
AUTO/MANUAL AUTO (p. 36)
3m
/30mΩ/300mΩ/3Ω/30Ω/300Ω/3kΩ/30kΩ/
Ω
300kΩ/3M
oFF/TC/∆T oFF
oFF/on oFF (p. 51)
PrSEt (factory default)/10 ms/ 30 ms/ 50 ms/ 100 ms/ 300 ms/ 500 ms/ 1,000 ms
Hi (300 mA)/ Lo (100 mA) Lo (p. 55)
oFF/A.HOLD (auto-hold)/A.HOLD,A.MEMORY (auto-memory)/INTERVAL (interval)
Ω
Default
value
3M
Temperature
PrSEt (p. 53)
oFF
(p. 36)
Ω
(p. 39)
(p. 50) (p. 67)
(p. 42) (p. 75)
See
92
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