Hioki RM3548 User manual

EN
RM3548
RESISTANCE METER
Instruction Manual
May 2015 Revised edition 1
RM3548A981-01 15-05H

How to use the Instruction Manual (this manual)
See below, as appropriate:
Be sure to always read the
following sections. 
“Safety Notes” (p. 4)
“Usage Notes” (p. 7)
When you wish to use the
instrument immediately “Overview” (p. 15)
When you need further information
on the various functions Refer to the “Contents” (p. i) and/or “Index” (p. Ind.1) to nd the desired function.
To nd out about product
specications
“Specications” (p. 93)
If the instrument does not operate
as intended or expected
“Troubleshooting” (p. 108)
For detailed information related to
resistance measurement “Appendix” (p. Appx.1)
RM3548A981-01
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付録索引

i
Introduction........................................................................................1
Verifying Package Contents.............................................................2
Safety Notes.......................................................................................4
Usage Notes.......................................................................................7
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
3 Basic Measurement 35
3.1 Setting the Measurement Range.................................36
3.2 Connecting the Test Leads to the Measurement
Target .............................................................................38
3.3 Reading the Measured Value.......................................39
Switching the display................................................................39
Verifying measurement errors..................................................40
Holding a measured value .......................................................42
Memorizing a measured value.................................................42
Contents
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Appx. Ind.

ii
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 300mΩRange)...................................................55
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
(Panel Save Function) ..................................................72
6.2 Loading Measurement Conditions
(Panel Load Function)..................................................73
6.3 Clearing the Contents of a Panel.................................74

iii
Contents
7 Memory Function (Saving and Exporting
Measurement Data to a PC) 75
7.1 Saving Data at Specied Time (Manual Memory) ......77
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
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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Appx. Ind.

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Contents
10 Maintenance and Service 107
10.1 Troubleshooting..........................................................108
Q&A (frequently asked questions and answers)....................108
Error display and actions........................................................114
10.2 Repair and Inspection ................................................115
10.3 Replacing Fuses .........................................................116
10.4 Disposing of the Instrument......................................117
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
Appx. 12 Adjustment...................................................Appx.33
Index Ind.1

1
Introduction
Introduction
Thank you for purchasing the HIOKI RM3548 Resistance Meter. To obtain maximum
performance from the product, please read this manual rst, and keep it handy for
future reference.
Registered trademarks
Windows and Excel are registered trademarks of Microsoft Corporation in the United
States and/or other countries.
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Appx. Ind.

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Verifying Package Contents
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
電池
ヒューズ
電池
ヒューズ
Spare fuse (F2AH/250 V)