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DT4281
DT4282
Instruction Manual
DIGITAL MULTIMETER
July 2016 Revised edition 7
DT4281A981-07 16-07H
EN
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Contents
Introduction .........................................................................1
Verifying Package Contents ..............................................1
Options (sold separately) ..................................................2
Safety Notes ........................................................................5
Usage Notes ......................................................................10
1
Overview 15
1.1 Overview and Features .................................15
1.2 Parts Names and Functions .........................16
1.3 Display ...........................................................21
1.4 Alarm Display and Battery Indicator ...........23
2
Preparation for Measurements 25
2.1 Measurement Workflow
................................25
2.2 Inserting/Replacing Batteries ......................26
2.3 Using Test Leads ...........................................28
2.4 Installation in Measurement Location .........31
Using the instrument with the stand ..........................31
Hanging the instrument with the strap ......................31
3
Performing Measurements 33
3.1 Inspection Before Use ..................................33
3.2 Measuring Voltage.........................................38
Measuring AC voltage ...............................................38
Measuring DC voltage ..............................................39
Measuring synthesized voltage of DC and AC .........39
Measuring voltage of DC and AC components .........40
3.3 Measuring Frequencies ................................40
3.4 Decibel Conversion (dBm/dBV) ...................41
DT4281A981-07 i
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Contents
3.5 Checking Continuity .....................................42
3.6 Measuring Diode ...........................................43
3.7 Measuring Resistance ..................................44
3.8 Measuring Temperatures ..............................45
3.9 Measuring Electrostatic Capacities .............47
3.10 Measuring Conductances (DT4282) ................48
3.11 Measuring Current ........................................49
Measuring DC/AC .....................................................49
3.12 Measuring AC Using Clamp-on Probe
(DT4281) .........................................................51
3.13 4-20 mA (0-20 mA) % Conversion ................53
4
Using Instrument Conveniently 55
4.1 Selecting the Measurement Range ..............55
Measuring with the auto range .................................55
Measuring with the manual range .............................55
4.2 Retaining the Measured Value .....................57
Retaining the measured value manually (HOLD) .....57
Automatically retaining the measured value when the value stabilizes (AUTO HOLD)..................57
4.3 When the Measured Value Fluctuates
(SLOW) ...........................................................59
4.4 Removing the Harmonic Components of the Inverter (FILTER) .................................60
4.5 Checking the Maximum/Minimum Value
(MAX/MIN) ......................................................61
4.6 Checking the Peak Value (V • A PEAK)
.......62
4.7 Checking the Relative Value/Performing
Zero Adjustment ............................................63
Checking the relative value (REL) ............................63
Performing zero adjustment ......................................64
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Contents
4.8 Using the Memory Function .........................65
Saving the measured value (MEM) ..........................65
Reading the memory data (READ) ...........................67
Clearing the memory data (CLEAR) .........................68
Clearing all memory data ..........................................68
4.9 Muting the Buzzer .........................................69
4.10 Turning On the Backlight ..............................69
4.11 Using the Auto Power Save (APS) ...............70
4.12 Using Plus/Minus Judgment Function for Measurement Value .................................71
4.13 Communicating with PC ...............................72
4.14 Setting and Checking the System ...............74
Checking that all indicators are displayed ................74
Checking the software version of the instrument ......74
Changing the temperature display unit .....................75
4.15 Resetting the System ....................................76
Table of default settings ............................................76
4.16 Power-on Option Table .................................77
5
Specifications 79
5.1 Electrical Characteristics .............................79
5.2 Accuracy Table ..............................................81
5.3 General Specifications
.................................95
6
Maintenance and Service 99
6.1 Repair , Inspection , and Cleaning .................99
6.2 Troubleshooting ..........................................101
6.3 Error Display ................................................105
6.4 Replacing Fuses ..........................................106
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Contents
Appendix Appx.1
Appx. 1 RMS and Average .............................Appx.1
Appx. 2 Operation Example ...........................Appx.2
Appx. 3 Capacitor Capacity Measurement
Principle.............................................Appx.3
Appx. 4 Dedicated Software
(DMM Communicator) ......................Appx.4
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Introduction
Introduction
Thank you for purchasing the HIOKI DT4281, DT4282 Digital
Multimeter. To obtain maximum performance from the product, please read this manual first, and keep it handy for future reference.
9243 graber
Verifying Package Contents
L4937 マグネットアダプ
タ
When you receive the instrument, inspect it carefully to ensure that no damage occurred during shipping.
In particular, check the accessories, panel switches, and connectors. If damage is evident, or if it fails to operate according to the specifications, contact your authorized Hioki distributor or reseller.
DT4911TestLead
DT4912TestLead
Check the package contents as follows.
マグネ付ストラップ
L9207-10 Test Lead (p. 28)
1
2
3
4
5
DT4281
L4931renketu
L4931 延長ケーブル
L4932(+9207-10cap)
L4935 ワニ口
L4936 バスバー
電池
6
(English)
Instruction manuals may also be available in other languages.
Please visit our website at http://www.hioki.com
/
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9243 graber
DM4910 熱電対
DT4911TestLead
DT4912TestLead
L4930 接続ケーブル
L4931renketu
L4931 延長ケーブル
L4932(+9207-10cap)
L4933 コンタクトピン
L4935 ワニ口
L4936 バスバー
9243 graber
Options (sold separately)
9243 graber
L4937 マグネットアダプ
タ
L4937 マグネットアダプ
タ L4937 マグネットアダプ
タ
Options (sold separately)
DM4910 熱電対
DM4910 熱電対
The following options are available for the instrument. Contact your authorized Hioki distributor or reseller when ordering.
L4934 小ワニグチ
L4934 小ワニグチ
DT4911TestLead
Connecting cables
L4934 小ワニグチ
DT4912TestLead
*1: CATIV 600 V/CATIII 1000 V/CATII 1000 V
*2: CATIV 600 V/CATIII 1000 V
*3: CATIII 1000 V *5: CATIII 300 V/CATII 600 V
*4: CATIII 600 V *6: 33 V AC/70 V DC
*7: CATIII 600 V/CATII 600 V
DM4910 熱電対
L4930 接続ケーブル
L4931renketu
L4937 マグネットアダプ
タ
L4931 延長ケーブル
L4931renketu
マグネ付ストラップ
L9207-10
マグネ付ストラップ
L9207-10
2
DM4910 熱電対
DT4911TestLead
DT4911TestLead
L9207-10* 1
L9207-10
Test Lead (10 A)
DT4912TestLead
DT4912TestLead
L4933*
L4934*
6
5
L4934 小ワニグチ
Contact Pin Set (3 A)
L4933 コンタクトピン
L4937 マグネットアダプ
タ
L4930*
(10 A)
2
Connection Cable Set
(Length: 1.2 m)
L4930 接続ケーブル
L4931renketu
L4931renketu
L4931renketu
L9207-10
L4935*
マグネ付ストラップ
L4934 小ワニグチ
Alligator Clip Set (10 A)
9243* 3
Grabber Clip (1 A)
L4930 接続ケーブル
L4936* 4
L9207-10
L9207-10
Bus Bar Clip Set (5 A)
マグネ付ストラップ
L9207-10
L4937 マグネットアダプ
タ
タ
L4937* 3
Magnetic Adapter Set (2 A) L4934 小ワニグチ
L4931* 2
9243 graber
L4931 延長ケーブル
L4931 延長ケーブル
L4932(+9207-10cap)
Extension Cable Set (10 A)
(Length: 1.5 m, with the coupling connector)
L4932(+9207-10cap)
L4932(+9207-10cap)
L4932* 1
Test Pin Set (10 A)
DT4911TestLead
L4935 ワニ口
L4933 コンタクトピン
DT4912TestLead
L4938* 7
L4933 コンタクトピン
Test Pin Set (10 A)
L4939* 4
L4936 バスバー
Breaker Pin Set (10 A)
L4930 接続ケーブル
* Figures in parentheses: maximum rated current
マグネ付ストラップ
L9207-10
L4931 延長ケーブル
L9207-10
L4931renketu
L4932(+9207-10cap)
L4931 延長ケーブル
L4933 コンタクトピン
L4932(+9207-10cap)
L4935 ワニ口
L4933 コンタクトピン
L4936 バスバー
L4935 ワニ口
L4936 バスバー
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Options (sold separately)
For the clamp current measurement (only compatible with the DT4281)
9704 Conversion Adapter
Clamp-on probe
9010-50, 9018-50
9132-50
9010-50, 9018-50, 9132-50* 4
Clamp-on Probe 1
Rated current
Diameter of the measurable conductor
500 A rms φ 46 mm or less
1000 A rms φ 55 mm or less, 80 × 20 mm bus-bar
タ
2
3
DT4910 Thermocouples (K) (p. 45)
•
• Temperature measuring junction: Exposed type (welding)
Sensor length: Approx. 800 mm
L4934 小ワニグチ
• Operating temperature: -40°C to 260°C (temperature measuring part), -15°C to 55°C (connector)
DT4912TestLead
マグネ付ストラップ
C0202 Carrying Case
L4930 接続ケーブル
The instrument, test leads, instruction manual, and others can be stored in the case.
L9207-10
L4931renketu
L4931 延長ケーブル
Z5004, Z5020 Magnetic Strap (p. 31)
L4932(+9207-10cap)
Attach this strap to the instrument and secure it on the wall surface such as a metal plate for use.
L4933 コンタクトピン
4
5
6
7
L4935 ワニ口 3
L4936 バスバー
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Options (sold separately)
DT4900-01 Communication Package (USB) (p. 72)
A communication adapter, USB cable, PC software, and communication specifications are included.
The instrument data can be stored on the PC.
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Safety Notes
Safety Notes
This 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, fire, 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.
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Protective gear
WARNING
To avoid electric shock when measuring live lines, wear appropriate protective gear, such as insulated rubber gloves, boots and a safety helmet.
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Safety Notes
Notation
In this manual, the risk seriousness and the hazard levels are classified 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 a high voltage hazard.
If a particular safety check is not performed or the instrument is mishandled, this may give rise to a hazardous situation; the operator may receive an electric shock, may get burnt or may even be fatally injured.
Indicates a strong magnetic-field hazard.
The effects of the magnetic force can cause abnormal operation of heart pacemakers and/or medical electronics.
Indicates prohibited actions.
*
Indicates the action which must be performed.
Additional information is presented below.
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Safety Notes
Symbols affixed 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 that dangerous voltage may be present at this terminal.
Indicates a double-insulated device.
Indicates a fuse.
Indicates a grounding terminal.
Indicates DC (Direct Current).
Indicates AC (Alternating Current).
Indicates DC (Direct Current) or AC (Alternating Current).
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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 set out by the EC Directive.
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Safety Notes
Screen display
This 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
RESET
####
メモリデータなし
1 2 3 4 5 6 7 8 9 0
VERSION TEMP F TEMP C
A different display is used in the case below.
Appears when a broken Thermocouple (K) is detected. (p. 45)
断線（Ｋ熱電対） Accuracy 電源遮断 ０−２０mA
We define measurement tolerances in terms of rdg. (reading) and dgt. (digit) values, with the following meanings:
メモリデータクリア rdg.
ブザーＯＦＦ オートパワーセーブＯＦＦ
The value currently being measured and indicated on the measuring instrument.
dgt.
(Resolution)
The smallest displayable unit on a digital measuring instrument, i.e., the input value that causes the digital display to show a “1” as the least significant digit.
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Safety Notes
Measurement categories
To ensure safe operation of measuring instruments, IEC 61010 establishes safety standards for various electrical environments, categorized as CAT II to CAT IV, and called measurement categories.
DANGER
• Using a measuring instrument in an environment designated with a higher-numbered category than that for which the instrument is rated could result in a severe accident, and must be carefully avoided.
• Using a measuring instrument without categories in an environment designated with the CAT II to CAT
IV category could result in a severe accident, and must be carefully avoided.
This instrument conforms to the safety requirements for CAT III 1000 V, CAT
IV 600 V measuring instruments.
CAT II: When directly measuring the electrical outlet receptacles of the primary electrical circuits in equipment connected to an
AC electrical outlet by a power cord (portable tools, household appliances, etc.)
CAT III: When measuring the primary electrical circuits of heavy equipment
(fixed installations) connected directly to the distribution panel, and feeders from the distribution panel to outlets
CAT IV: When measuring the circuit from the service drop to the service entrance, and to the power meter and primary overcurrent protection device (distribution panel)
Distribution panel
Service entrance
Service drop
CAT IV
Power meter
Internal wiring
CAT II
CAT III
T
Outlet
Fixed installation
See: “2.3 Using Test Leads” (p. 28)
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Usage Notes
Usage Notes
Follow these precautions to ensure safe operation and to obtain the full benefits of the various functions.
DANGER
If the test lead or the instrument is damaged, there is a risk of electric shock. Before using the instrument, perform the following inspection.
• Before using the instrument, check that the coating of the test leads 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 specified by our company.
• Before using the instrument for the first time, verify that it operates normally to ensure that no damage occurred during storage or shipping. If you find any damage, contact your authorized Hioki distributor or reseller.
Installation
Installing the instrument in inappropriate locations may cause a malfunction of instrument or may give rise to an accident. Avoid the following locations. For details on the operating temperature and humidity, see the specifications. (p. 95)
CAUTION
• 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 field 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
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Usage Notes
Handling the cables
WARNING
To prevent electric shock, when measuring the voltage of a power line use a test lead that satisfies the following criteria:
• Conforms to safety standards IEC61010 or EN61010
• Of measurement category III or IV
• Its rated voltage is higher than the voltage to be measured
All of the optional test leads for this device conform to the safety standard EN61010. Use a test lead in accordance with its defined measurement category and rated voltage.
CAUTION
• Avoid stepping on or pinching the cable, which could damage the cable insulation.
• To avoid damaging the cables, do not bend or pull the leads and the probe bases.
The ends of the test leads are sharp. Be careful to avoid injury.
For the test leads supplied with the instrument or the options to be connected to the instrument, see the following information.
Accessories and options
Test lead
Thermocouples (K)
Clamp-on probe
USB cable
Magnetic strap
Reference
“2.3 Using Test Leads” (p. 28)
“3.8 Measuring Temperatures” (p. 45)
See the Instruction Manual which accompanies the optional clamp.
“4.13 Communicating with PC” (p. 72)
“2.4 Installation in Measurement
Location” (p. 31)
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Usage Notes
Precautions during measurement
WARNING
If the instrument is used in locations where the rating indicated on the instrument or probes is exceeded, the instrument may be damaged resulting in personal injury. Do not use the instrument in such locations.
See “Measurement categories” (p. 9).
• With regard to the 10 A range, the maximum input current is 10 A DC/10 Arms AC. Supplying a current in excess of the maximum input may damage the instrument and result in personal injury. Do not supply current in excess of the specified limit. (Only the DT4282)
Observe the following to avoid electric shock and/or short circuits.
• Hazardous voltage may be generated in a free measurement terminal. Do not touch the free terminal.
• Use only test leads and optional equipment specified by our company.
• Do not allow the metal part of the test lead to touch any exposed metal, or to short between 2 lines.
Never touch the metal end.
• When connecting the clip-type test lead to the active terminal, do not allow the lead to touch any exposed metal, or to short between 2 lines.
• When the clamp-on probe is opened, do not allow the metal part of the clamp to touch any exposed metal, or to short between 2 lines, and do not use over bare conductors. (For the clamp current measurement, only the DT4281)
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Usage Notes
CAUTION
• Do not input voltage or supply current exceeding the specified measurement range. Doing so may damage the instrument.
• During the continuity check, diode test, or measurement of resistance, conductance, or electrostatic capacity, measurement signals are generated in the terminals of the instrument. Depending on the target for measurement, the measurement signal may cause damage.
Seeing “Measurement current” and “Open circuit voltage” in the accuracy table (p. 81), check, in advance, that there are no adverse effects of the measurement current and the open circuit voltage.
Precautions during shipment
Observe the following during shipment. Hioki cannot be responsible for damage that occurs during shipment.
CAUTION
• 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 before shipment.
If the instrument is not to be 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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1 Overview
1
Overview
1.1 Overview and Features
1
This measuring instrument is a multi-function, high-precision digital multimeter which ensures both safety and durability.
Main features
• Filter function effective for the inverter measurement
•
• Speedy display of the RMS measured value
• Environmental performance (can be used anywhere) (Operation temperature: -15 to 55°C)
• High noise-proof performance
Solid body which can be used for an extended period of time (drop-proof)
•
Useful functions during measurement
• Noise reduction (FILTER)
• Display stability (SLOW)
• Display hold (HOLD)
Maximum/Minimum value display
• High accuracy (DCV: 0.025%), wide band (20 Hz to 100 kHz) measurement
• Speedy measurement via a fast response (0 V → 100 V response 1 second*)
* Until the value falls within the accuracy specification range.
9243 graber
If too many data are entered, a hazard is indicated by the red backlight.
Large, easily-viewable display
Backlighting for use in dark environments
Problem finding a suitable installation location?
DM4910 熱電対
The strap with magnet allows the device to be hung conveniently.
DT4911TestLead
タ
2
3
5
L4934 小ワニグチ
114.1V
85.9V
100V 100V
For the DC power supply maintenance
The peak measurement function is used to capture the ripple voltage superimposed on the DC signal.
For control of the UPS battery cell voltage, etc., the measurement value can be saved to the embedded memory (up to 400 data). 7
PEAK max
114.1V
PEAK min 9243 graber
85.9V
100V
DC
The measurement test leads and the end pins can be selected depending on the purpose of use.
100V
AC 成分の波形
L4930 接続ケーブル
L4931 延長ケーブル
Data transmission to PC, control
The optional
DT4900-01
Communication
Package is required.
L4935 ワニ口
15
マグネ付ストラップ
L4936 バスバー
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114.1V
85.9V
100V L4931renketu
L4931 延長ケーブル
L4932(+9207-10cap)
100V
±14.1V
L9207-10
L4933 コンタクトピン
L4935 ワニ口
L4936 バスバー www.
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Parts Names and Functions
1.2 Parts Names and Functions
Front
Some indications are different between the DT4281 and DT4282.
DT4281
Display
(p. 21)
Operation keys (p. 17)
Rotary switch
(p. 18)
Measurement terminals
(p. 19)
DT4282
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Parts Names and Functions
7
8
9
5
6
2
3
1
Operation keys
4 6
5 7
1
2
3
4
10
8
9
(*) Pressing a key for at least 1 second activates the function indicated above the key. To disable the function, change the rotary switch setting.
1
10
2
•
• Displays the maximum or minimum value. (p. 61)
(*) activates the relative value display function. (p. 63)
• Selects the range (manual range). (p. 55)
• (*) changes to the auto range.
(The default is the auto range.)
Changes to the peak measurement. The maximum or minimum instantaneous value is measured. (p. 62)
•
• Deletes the stored data. (p. 68)
Clears the maximum or minimum value. (p. 61)
• Clears the peak value. (p. 62)
•
• Retains the displayed value. (p. 57)
(*) activates the auto hold function.
•
• Reads the stored data. (p. 67)
(*) toggles the filter function between on and off. (p. 60)
• Saves the measurement data. (p. 65)
• (*) toggles the display update speed between normal and slow. ([SLOW] is used to stabilize the display.) (p. 59)
Turns on or off the display backlighting. (p. 69)
Increases/Decreases the memory No. or numeric value.
(When / are displayed on the LCD, these keys can be operated.)
Changes the function of the rotary switch to that indicated shown in blue.
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2
3
Parts Names and Functions
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Parts Names and Functions
Measurement terminals
1
2 3 4
DT4281
1 2 3 4
DT4282
1 DT4282
Current measurement (A) terminal. The red test lead is connected.
When the rotary switch is set to the current measurement, the shutter opens.
2 Current measurement (µA, mA) terminal. The red test lead is connected. When the rotary switch is set to the current measurement, the shutter opens.
3 Commonly used for each measurement. The black test lead is connected.
4 Used for voltage measurement, resistance measurement, continuity check, diode test, temperature measurement, clamp current measurement DT4281 , or conductance DT4282 . Hereafter referred to as “V terminal”.
The red test lead is connected.
When the rotary switch is set to any of the measurements above, the shutter of the current measurement terminal is closed.
Be sure to carefully read the precautions in the following references.
See “Precautions during measurement” (p. 12).
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See “Replacing Fuses”
(p. 106).
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Parts Names and Functions
Rear
Serial number label
It is necessary for production control such as product warranty.
Do not peel off the label.
Communication port
When the communication adapter supplied with the optional
DT4900-01 Communication
Package is connected, the data can be transmitted to the PC.
(p. 72)
Test lead holder
The test lead can be held.
Strap hole
The optional Z5004 or Z5020
Magnetic Strap can be attached.
(p. 31)
Stand
The instrument can be set on the stand. (p. 31)
Battery cover
When replacing the batteries
(p. 26) or fuse (p. 106), remove the cover.
See p. 26.
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Display
1.3 Display
For error displays, see “6.3 Error Display” (p. 105).
3 4
Memory No.
1
2
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7
Main display
1
2
3
4
5
Sub display
9 8
Blinks if the maximum value in each range is exceeded. (Voltage, current, continuity, diode, resistance, temperature, electrostatic capacity, conductance)
Holds measured value. (p. 57)
The auto hold function is activated. (p. 57)
Communicating with the PC. (p. 72)
The memory function is activated. (p. 65)
Memory reading state (p. 67)
Stored data exist. (p. 65)
/ can be operated. (p. 65)
Battery indicator (p. 24)
The auto power save function is activated. (p. 70)
The buzzer can be used. (p. 69)
21
1
2
3
4
5
6
7
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Display
6
7 (Unit)
8
9
Maximum value (p. 61)
Minimum value (p. 61)
Each unit
The display update (sampling) is performed at SLOW speed. (p. 59)
The filter function is activated. (p. 60)
The relative value display function is activated. (p. 63)
Auto range (p. 55)
Manual range (p. 55)
Maximum value in the peak measurement (p. 62)
10
11
Minimum value in the peak measurement (p. 62)
When are displayed, change values.
/ can be used to
Threshold of the continuity check (p. 42)
Threshold of the diode test (p. 43)
AC measurement
DC measurement
AC measurement + DC measurement
During the temperature measurement, the temperature difference from the standard is displayed.
(p. 45)
Continuity check (p. 42)
Diode test (p. 43)
DT4281 Clamp current measurement (p. 51)
% conversion measurement of 4-20 mA (0-20 mA)
(p. 53)
( DT4281 : DT4281 only, DT4282 : DT4282 only)
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COPY: MEAS̲ dBm dBV
OVER 最大入力範囲超え 過負荷検出
COPY: MEAS̲ 4-20
RANGE
Alarm Display and Battery Indicator
1.4 Alarm Display and Battery Indicator
The following conditions are informed via the red backlight, display, and buzzer.
COPY: MEAS̲ dBm dBV
When the maximum input range is exceeded
Voltage/Current measurement blinks, the red backlight blinks, the maximum value within the maximum range blinks, and the buzzer sounds.
Corrective action:
Immediately move the test leads away from the measurement object.
When the measured value exceeds the maximum value in each range (Range over)
Voltage/Current measurement
blinks, the red backlight lights up, and the maximum value blinks.
Corrective action:
Change the range.
SLOW
OVER レンジオーバー
MAX
Measurements other than voltage and current
and the maximum value blinks.
Corrective action:
Change the range, or measure the samples in the specified range.
If the same symptom still occurs, check that the test leads are not broken. (p. 34)
OVER レンジオーバー (2)
23
HOLD
1
COPY: MEAS̲ 4-20
2
3
4
RANGE
5
6
7 REL
OVER レンジオーバー
HOLD
ΔＴ
SLOW MAX REL ΔＴ
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RESET
####
RESET
####
Alarm Display and Battery Indicator
When the Thermocouple (K) is broken (Temperature measurement)
TEMP C
断線（Ｋ熱電対）
Corrective action:
Check that the thermocouple has been connected correctly to the measurement terminal. If the display does not change, replace with a new Thermocouple
０−２０mA
メモリデータなし
Battery indicator
Fully charged.
(Charge: 60% or more)
メモリデータクリア ブザーＯＦＦ black charge bars disappear, one by one, from the left of the battery indicator.
The battery voltage is low. Replace the batteries as soon as possible.
(Blinks) The battery is exhausted.
Replace the batteries.
オートパワーセーブＯＦＦ
(Charge: 20% or more)
(Charge: 5% or more)
(Charge: less than 5%)
VERSION
断線（Ｋ熱電対）
Power shutdown
When the charge is 0% (less than 3.8 V ± 0.2 V),
[bAtt Lo] is displayed for 1 second and the power is shut down.
電源遮断 ０−２０mA
メモリデータなし メモリデータクリア
24
ブザーＯＦＦ オートパワーセーブＯＦＦ
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2 Preparation for Measurements
2
Preparation for Measurements
2.1 Measurement Workflow
Before using the instrument, be sure to read “Usage Notes” (p. 10).
Installation and connection
Insert the batteries. (p. 26)
As necessary, have other optional items available and ready.
Perform the startup check. (p. 33)
4
5
Measurement
3
1
6
1
2
3
4
7
3
5 2 measurement terminals. (p. 28)
(As necessary, perform zero adjustment. (p. 64))
1
Connect the test leads to the measurement object.
(As necessary)
Hold the display of the measured value. (p. 57)
Save the measured value. (p. 65)
Black
2
Red
6
7
8
9
End of the measurement
Move the test leads away from the measurement object and then turn off the power.
25
1
2
3
4
5
6
7
8
9
10
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Inserting/Replacing Batteries
2.2 Inserting/Replacing Batteries
Before using the instrument first time, insert four LR6 alkaline batteries. Before measurements, check that the battery level is sufficient. When the battery charge diminishes, replace the batteries.
Nickel-metal hydride batteries
Nickel-metal hydride batteries can be used. However, the discharge characteristic of these batteries is different from that of alkaline batteries. Be aware that the remaining battery power display does not function properly.
WARNING
To avoid electric shock, disconnect the test leads from the object to be measured before replacing the batteries.
To avoid the possibility of explosion, do not short circuit, charge, disassemble, or incinerate batteries.
After battery replacement but before using the instrument, reattach and screw down the battery cover.
CAUTION
Poor performance or damage from battery leakage could result. Observe the cautions listed below.
• Do no mix new and old batteries, or different types of batteries.
•
• Be careful to observe the battery polarity during installation.
Do not use batteries after their recommended expiry date.
• Do not allow used batteries to remain in the instrument.
• To avoid corrosion from battery leakage and/or damage to the instrument, remove the batteries from the instrument if it is to be kept in storage for an extended period.
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Inserting/Replacing Batteries
• The indicator appears when the battery charge diminishes.
Replace the batteries as soon as possible.
•
• After use, be sure to turn off the instrument.
Handle and dispose of batteries in accordance with local regulations.
Screws
Rear
1 Have the following items available and ready.
• Phillips screwdriver
• Alkaline (LR6) battery or manganese (R6) battery × 4
2 Remove the test leads from the instrument.
3 Set the rotary switch to OFF.
4 Using a Phillips screwdriver, remove the screws (2 locations) from the battery cover on the rear of the instrument.
5 Remove the battery cover.
6 When replacing the batteries, remove all old batteries.
7 Insert 4 new batteries (LR6 or R6), being careful to the battery polarity.
8 Reattach the battery cover.
9 Secure the cover with the screws.
After the battery cover is removed, the fuse can be seen. When replacing the fuse, see “6.4
Replacing Fuses” (p. 106).
1
2
3
4
5
6
7
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Using Test Leads
2.3 Using Test Leads
The L9207-10 Test Lead supplied with the instrument are used for measurements.
Depending on measurement locations, use our optional measurement cables. For details on the optional items, see “Options
(sold separately)” (p. 2).
WARNING
• To prevent a short circuit accident, be sure to use the test leads with the sleeves attached when performing measurements in the CAT III and CAT
IV measurement categories. (For the measurement categories, see “Measurement categories” (p. 9).)
• If the sleeves are inadvertently removed during measurement, stop the measurement.
CAUTION
• To ensure safe operation, use only test leads specified by our company.
• When carrying out measurements with the sleeves in place, be careful to avoid damaging the sleeves.
• The tips of the metal pins are sharp and may cause injury. Do not touch the tips.
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Using Test Leads
L9207-10 Test lead
Black
Red
Barriers Sleeves
1
Plugs
Cables Metal pins
The plugs of the test leads are covered with the safety caps.
Before use, remove the caps.
Safety cap
2
3
4
Metal pin Connect to the object to be measured.
4 mm or less (sleeve attached)
19 mm or less (sleeve removed)
Diameter φ approx. 2 mm
Sleeve
Barrier
Attach to the metal pins to prevent short circuit accidents.
Represents the safe handling distance from the metal pins.
During measurement, do not touch the area between the barrier and the tip of the sleeve.
Plug
Cable
Connect to the measurement terminals on this instrument.
Double sheathed cables (Length: approx. 900 mm, Diameter:
φ approx. 3.6 mm)
When the white portion inside the cable is exposed, replace with a new L9207-10 Test Lead.
5
6
7
29
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Using Test Leads
Removing and attaching the sleeves
Removing the sleeves Attaching the sleeves
Gently hold the bottom of the sleeves and pull the sleeves off.
Safely store the removed sleeves so as not to lose them.
Insert the metal pins of the test leads into the holes of the sleeves, and firmly push them all the way in.
Connecting to the instrument
1 Turn the rotary switch to the desired measurement function.
2 Connect the test leads to the relevant measurement terminals.
1
• Besides the current measurement
(excluding the clamp)
COM terminal
V terminal
Connect the black test lead.
Connect the red test lead.
2
• Current measurement
COM terminal Connect the black test lead.
µA/mA terminal Connect the red test lead.
A terminal (Only the DT4282)
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Installation in Measurement Location
2.4 Installation in Measurement Location
Using the instrument with the stand
Position the instrument with the stand at the rear.
CAUTION
• Do not position the instrument on an unstable table or inclined surface.
• When the instrument is set on the stand, do not apply a strong force above.
Doing so may damage the stand.
Hanging the instrument with the strap
Attach the optional Z5004 or Z5020 Magnetic Strap to the instrument and attach the magnet to the wall surface (with metal plate affixed).
Example: model Z5004
1
2
3
4
5
6
7
Strap holes Magnet
Attach it to the wall surface
(with metal plate affixed).
31
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Installation in Measurement Location
DANGER
Those with medical electronics such as pacemakers should not use the Z5004 or Z5020 Magnetic Strap.
Nor should such persons approach the Z5004 or
Z5020. It is extremely dangerous. The electronics may not operate properly and the life of the operator may be put at great risk.
CAUTION
• Do not use the Z5004 or Z5020 in locations where it may be exposed to rainwater, dust, or condensation.
In those conditions, the Z5004 or Z5020 may be decomposed or deteriorated. The magnet adhesion may be diminished. In such case, the instrument may not be hung in place and may fall.
• Do not bring the Z5004 or Z5020 near magnetic media such as floppy disks, magnetic cards, pre-paid cards, or magnetized tickets. Doing so may corrupt and may render them unusable. Furthermore, if the Z5004 or
Z5020 is brought near precision electronic equipment such as PCs, TV screens, or electronic wrist watches, they may fail.
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3
Performing Measurements
3
Performing Measurements
3.1 Inspection Before Use
Before using the instrument the first time, verify that it operates normally to ensure that the no damage occurred during storage or shipping. If you find any damage, contact your authorized Hioki distributor or reseller.
Appearance check of the instrument and test leads
Check item
The instrument is neither damaged nor cracked.
The internal circuits are not exposed.
The terminals are not contaminated with debris.
The coating of the test leads is neither broken nor frayed, or the white portion or metal part within the lead is exposed.
Action
Visually check the instrument.
If it is damaged, there is a risk of electric shock. Do not use the instrument but send it for repair.
Remove contamination with a cotton swab.
If the test lead is damaged, there is a risk of electric shock. Do not use the instrument but send it for repair.
1
2
3
4
5
6
Check when turning on the power
(Set the rotary switch to any position other than OFF.)
Check item Action
The battery voltage is sufficient.
When the indicator appears in the top right corner of the display, the battery voltage is low. Replace the batteries as soon as possible.
7
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1
2
3
4
Inspection Before Use
Check item
No indicators are missing.
Action
Display all indicators and ensure that no indicators are missing. (p. 74) If any of the indicators are missing, send the instrument for repair.
Operation check
This section introduces some of the operation checks. Periodical calibration is necessary in order to ensure that this instrument operates according to its specifications.
1 Check that the test leads are not broken.
Check method
Regarding the continuity check, deliberately short circuit the test
5
6
Action
Normal:
The value stabilizes at around 0.1 to 0.2 Ω .
Ω
7
Abnormal:
A numeric value other than the above appears.
Black
Red
Corrective action:
8
Replace with those specified by our company.
If the same phenomena persist even after the test leads are
9
Halt inspection and then send the instrument for repair.
1
2
3
4
5
6
7
8
9
10
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1
2
Inspection Before Use
2 Measure samples (such as battery, commercial power supply, and resistor) of which values have already been known, and check that the appropriate values appear.
Check method
Example:
4
5 measurement to measure the
3
Action
6
Normal:
An already-known value appears.
(In this example, the commercial
7
Abnormal:
The measured value does not appear.
8
The malfunction may occur.
Stop the inspection and do not use the instrument.
9
1
2
3
4
Black
Red 5
3 Check that the fuse is not broken.
Check method
1. Remove the fuse from the instrument. (p. 106)
2. Reattach the battery cover.
3. In the resistance measurement, check the resistance of the fuse. (Resistance measurement
(p. 44))
Normal:
Fuse rating
630 mA
11 A
Action
Resistance
Approx. 1.2 Ω
0.1 Ω or less
Abnormal:
If the value above is not obtained (the value higher than that is displayed), replace the fuse. (p. 106)
35
6
7
2
1
3
4
5
6
7
8
9
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Inspection Before Use
Before measurements
WARNING
Observe the following to avoid short circuit accidents.
• Always verify the appropriate setting of the rotary switch before connecting the test leads.
• Disconnect the test leads from the measurement object before switching the rotary switch.
• Operate or connect the instrument by following the procedure of each measurement example (or procedure steps).
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Inspection Before Use
Auto power save function
• Before shipping (In the default setting), the auto power save function is set to enabled. If the instrument has not been operated for approx. 15 minutes, it enters the sleep mode. (When the instrument is in the sleep mode, press any key or turn the rotary switch to recover from the sleep mode.)
When the sleep mode continues for approx. 45 minutes, the power turns off automatically.
• To recover from the power off state, set the rotary switch to OFF and then turn on the power again.
• During current measurement, before setting the rotary switch to
OFF, disconnect the test leads. If the rotary switch is forcibly turned, the shutter may be damaged.
• If the instrument will be used for an extended period of time, disable the auto power save function. (p. 70)
• After use, set the rotary switch to OFF. The auto power save function consumes a small amount of current.
Numerical value display with no input
When the measurement terminal is open during DC voltage (DCV) measurement or AC voltage (ACV) measurement in the 60 mV range or
600 mV, a random value is displayed. This does not indicate a malfunction of the instrument. When the probe is connected to the measurement target, a normal numerical value is displayed. A high-input impedance voltmeter is used in the instrument for highly sensitive measurement. Consequently, external noise, such as inductive noise, appears as a numerical value.
1
2
3
4
5
6
7
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Measuring Voltage
1
2
3.2 Measuring Voltage
AC voltage, DC voltage, synthesized voltage of DC and AC, and voltage of AC and DC components can be measured. Furthermore, the maximum, minimum, and peak (instantaneous) values of measured values can be checked. (p. 61)
Before measurements
WARNING
If the instrument is used in locations where the rating indicated on the instrument or probes is exceeded, the instrument may be damaged resulting in personal injury. Do not use the instrument in such locations.
See “Measurement categories” (p. 9).
The autoranging function of this instrument automatically selects the optimum measurement range. To change the range arbitrarily, use the manual range. (p. 55)
4
5
6
Measuring AC voltage
3 7
1
3
Measure the AC voltage.
Measure the frequency simultaneously.
8
The measured value is a true RMS.
(p. Appx.1)
9
Red
38
Black
2
1
2
3
4
5
6
7
8
9
10
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Measuring Voltage
Measuring DC voltage
4 6
3
1
3
Measure the DC voltage.
7
1
3
2 8 2 2
114.1V
85.9V
100V
1
2
1
3
9
Red
Black
1
4
2
5
Measuring synthesized voltage of DC and AC
3
5
6
4 6
2 7
100V
±14.1V
COPY: MEAS̲ACV 1
Black
2
PEAK
Red
3
4
COPY: MEAS̲DCV 8 COPY: MEAS̲ DC+ACV
7
導通
9
DC and AC.
The measured value is a true RMS.
(p. Appx.1)
ダイオード
8
5
3
2
6
9 COPY: MEAS̲DC-ACV
4
1
7
コンダクタンス（Ｓ）
It is also possible to check the AC or DC components individually. (p. 40)
4
5
5
1
2
6
3
6
4
7
7
8
9
10
8
9
10
5
39
DC+AC の波形
114.1V
静電容量（Ｃ）
85.9V
100V
温度ＴＥＭＰ COPY: MEAS̲DCuA 交流電流ＡＣＡ
6
7
8
9
10
DC 成分の波形
100V
AC 成分の波形
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±14.1V
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114.1V
85.9V
100V 100V
±14.1V
COPY: MEAS̲ACV
PEAK
静電容量（Ｃ）
Measuring Frequencies
4
5
4
6 5
6
3
3
7
114.1V
85.9V
1
4
100V
5
2
6
2
Synthesized voltage
7
DC component
AC component
8
±14.1V
2
1
1
8
4
1
DC+AC の波形
Black
3
114.1V
Red
85.9V
100V
9
Voltage of the DC component
Voltage of the AC component
COPY: MEAS̲DCV
DC+AC の波形
COPY: MEAS̲ DC+ACV COPY: MEAS̲DC-ACV
3.3 Measuring Frequencies
114.1V
成分の波形
85.9V
be checked in the sub display. It is not possible to change the frequency range.
1
9
2
3
7
DC 成分の波形
導通
AC 成分の波形
ダイオード
100V
コンダクタンス（Ｓ）
±14.1V
Frequency
AC 成分の波形
114.1V
• If signals out of the range of frequency measurement are measured,
[-----] appears. Be aware of it.
• The sensitivity of the frequency measurement is regulated by range.
(Minimum sensitivity voltage (p. 92), Minimum sensitivity current (p. 92))
When the value is less than the minimum sensitivity voltage (current),
COPY: MEAS̲DCuA 温度ＴＥＭＰ
114.1V
85.9V
85.9V
100V
• During the measurement of low frequency, if the auto range does not
40 stabilize and frequency cannot be measured, fix the range and measure again.
±14.1V
100V 100V
COPY: MEAS̲ DC+ACV
ダイオード
4
8
9
5
1
2
COPY: MEAS̲DC-ACV
コンダクタンス（Ｓ）
3
6
±14.1V
静電容量（Ｃ） 温度ＴＥＭＰ COPY: MEAS̲DCuA 交流電流ＡＣＡ
4
2 7
3
5
4
6 5
7
6
8
1 8
9
10
9
10
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8
9
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1
2
3
4
5
6
MEM
7
交流電流 ( クランプ入力 )
8
9
READ
導通ショート
Decibel Conversion (dBm/dBV)
2
3.4 Decibel Conversion (dBm/dBV)
The result of the AC voltage measurement is decibel-converted for the standard and then displayed. For details on the conversion formula, see “Decibel conversion measurement” (p. 93).
dBm For the voltage measurement, the “power ratio” for power 1 mW by the standard resistance is decibel-converted and then displayed.
(Cable loss)
5 dBV
3
1
4 6 voltage 1 V is decibel-converted and then displayed. (Voltage gain)
2
7
([dBm] or [dBV] lights up)
In the case of [dBm]
Electric telecommunication line
8
1
Amplifier
Transmitter
Black
3
Red
Example: Measuring the [dBm] cable loss
COPY: MEAS̲ dBm
抵抗
4 9
Frequency
In the case of [dBV]
10
Frequency dBV
1
2
3
4
5 dBV
1 Turn on the power while pressing
.
2 / (Select a desired value.)
3 (Confirm the value.)
Standard impedance selection range (p. 93)
COPY: MEAS̲DCA
Even after the power is turned off, the setting is retained.
SLOW
41
6
COPY: MEAS̲ 4-20
7
過負荷検出
RANGE
MAX
クランプ（レンジ設定） マニュアルレンジ オートホールド
SLOW
0adj 後
MAX REL
COPY: MEAS̲ 4-20 OVER レンジオーバー
OVER レンジオーバー
RANGE
HOLD
REL
ΔＴ
HOLD
ΔＴ
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1
2
3
4
Checking Continuity
3.5 Checking Continuity
The input short circuit is detected and informed via a buzzer and red backlight.
WARNING
Before measuring, be sure to turn off the power to the measurement circuit. Otherwise, electric shock may
6
Resistance
COPY: MEAS̲ DC+ACV
4
5
1
5
7 3
3
8 2
PEAK
Black
2
Red
9 1
Changing thresholds
Use / to change a threshold. Even after the power is turned off, the setting is retained.
ダイオード
COPY: MEAS̲DCuA
Detection
Open detection
Short circuit detection
20 Ω
(default)
220 Ω or more
50 Ω
250 Ω or more
20 Ω
or less
50 Ω
or less
100 Ω 500 Ω Buzzer
300 Ω or more
600 Ω or more
Does not sound
100 Ω
or less
500 Ω
or less
Sounds
Red backlight
Turns off
Turns on
42
6
COPY: MEAS̲DC-ACV
7
8
コンダクタンス（Ｓ）
9
10
交流電流ＡＣＡ
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Measuring Diode
1
2
3
3.6 Measuring Diode
COPY: MEAS̲ACV
The forward voltage of the diode is measured. If the forward voltage of the diode is the threshold or less, it is informed via a buzzer and red backlight.
WARNING
Before measuring, be sure to turn off the power to the measurement circuit. Otherwise, electric shock may occur or the instrument may be damaged.
COPY: MEAS̲DCV COPY: MEAS̲ DC+ACV
1
2
Forward voltage
4
PEAK
1
5
6
Black
3
Red
2
Anode Cathode
7
4
導通
8
9
2
In the case of the opposite connection
1
4 4
3
5
コンダクタンス（Ｓ）
5
6
7
交流電流ＡＣＡ 静電容量（Ｃ） COPY: MEAS̲DCuA
Use / to change a threshold.
ダイオード＿逆方向
Threshold: 0.15 V/0.5 V (default)/1 V/1.5 V/2 V/2.5 V/3.0 V
Even after the power is turned off, the setting is retained.
43
6
7
8
9
10
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1
2
3
4
Measuring Resistance
5
3.7 Measuring Resistance
Resistance is measured.
1
6
WARNING
Before measuring, be sure to turn off the power to the measurement circuit. Otherwise, electric shock may occur or the instrument may be damaged.
7
3
3
8
2
Black
2
Red
9 1
The open terminal voltage is approx. 2.5 V or less. The measurement current (DC) varies depending on the range. (p. 86)
To avoid damage to the measurement object, check the specifications before use.
4
5
6
7
8
9
10
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Measuring Temperatures
3.8 Measuring Temperatures
Using our optional DT4910 Thermocouples (K), temperatures can be measured.
CAUTION
To avoid damage to the instrument, do not input any voltage or supply current to the thermocouple.
1
2
1
3
RESET
When a breaking state of detected
TEMP F the Thermocouples (K) is
3
4
2
####
Be careful to observe the polarity when connecting the thermocouple.
Checking the temperature change
断線（Ｋ熱電対）
Check the following values.
• Relative value display (p. 63)
電源遮断
• Maximum/Minimum value display
(p. 61)
5
6
Changing the temperature units
Celsius and Fahrenheit can be
ブザーＯＦＦ
7
DT4910
TEMP C
０−２０mA
オートパワーセーブＯＦＦ
45
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Measuring Temperatures
When measuring temperatures with the thermocouple applied to the surface of the measurement object
Clean the surface so that the thermocouple can make contact with the object securely.
If no numeric value is displayed after the thermocouple is attached ([OPEn] is displayed):
The instrument or thermocouple may be malfunctioning.
Check this with the following procedure.
1 Short-circuit the V and COM terminals of the instrument using the test leads.
To step 2 The ambient temperature is displayed.
The ambient temperature is not displayed.
The instrument is malfunctioning. Send it for repair.
2 Connect the thermocouple in the correct direction.
[OPEn] remains displayed.
The thermocouple may be malfunctioning (blown).
Replace the thermocouple with a new one.
46
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1
2
3
4
5
Measuring Electrostatic Capacities
3.9 Measuring Electrostatic Capacities
The capacity of the capacitor is measured.
WARNING
Before measuring, be sure to turn off the power to the measurement circuit. Otherwise, electric shock may occur or the instrument may be damaged.
6
1
7
3
3
8 2
1
2
3
5
4
5 9 1
Black
2
Red
• When measuring the polar capacitor
Connect the V terminal (red test lead) to the + terminal of the capacitor and the COM terminal (black test lead) to the - terminal.
• For components on a circuit board, measurement may not be possible due to the effect of the peripheral circuit.
• If the capacity changes when the measurement range is changed (p. Appx.3)
6
7
47
6
7
8
9
10
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1
2
3
4
5
6
7
8
9
2
1
3
4
5
Measuring Conductances (DT4282)
3.10 Measuring Conductances (DT4282)
The resistance is measured and the inverse number is displayed
(Unit: nS, nano-siemen). When the resistance is excessively large, it is used.
Example: When the resistance is 50 M
(M = 10 6 , n = 10 -9 )
Ω
, 1/50 M
When the terminal is open, 0 nS appears.
Ω
= 20 nS.
6
1
WARNING
Before measuring, be sure to turn off the power to the measurement circuit. Otherwise, electric shock may occur or the instrument may be damaged.
2
7
4
8
Black
3
Red
9
10
The open terminal voltage is approx. 2.5 V or less. The measurement current (DC) is approx. 96 nA. (p. 87)
To avoid damage to the measurement object, check the specifications before use.
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Measuring Current
3.11 Measuring Current
DC/AC is measured.
DANGER
• Do not input any voltage to the current measurement terminals.
Doing so may result in short circuit accidents.
• To avoid electrical accidents, turn off the power to the circuit before measuring and then connect the test leads.
Measuring DC/AC
1
2
3
Function
is used to toggle between DC and AC.
→ µA Selected to measure 6000 µA or less.
mA Selected to measure 600 mA or less.
A Selected to measure 10 A or less.
(DT4282)
→
→
→
* The 0-20 mA input can be selected via the power-on option. (p. 77)
*
When measuring an unknown current
Set to the high range ( mA for the DT4281, A for the DT4282).
4
5
6
7
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1
2
3
4
5
6
7
8
9 1
2
3
4
5
Measuring Current
6
DT4281, DT4282
7
1
8
2
Control board
9
4
10
Red Black
3
Example: Measuring the current of the burner flame ( µA )
The measured current value of the burner flame varies with the input impedance of the instrument.
The μA input impedance of this instrument is approx. 100
Ω
.
DT4282
2
1
Power supply
Black
4
Red
Load
3
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Measuring AC Using Clamp-on Probe (DT4281)
3.12 Measuring AC Using Clamp-on
Probe (DT4281)
The current is measured using our optional clamp-on probe (9010-
50, 9018-50, 9132-50). To connect to this instrument, the 9704
Conversion Adapter is required. Before using the clamp-on probe, be sure to read the Instruction Manual which accompanies the optional clamp.
1 2
1
2
3
9704 Conversion Adapter 4
3 Clamp-on Probe
5
5
Set the clamp-on probe and the instrument to the same range.
4
Current range
6 Change the range in accordance with the actual measurement.
If the range of the clampon probe is changed during measurement, change the range of the instrument as well.
51
6
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Measuring AC Using Clamp-on Probe (DT4281)
When clamping a cable
Attach the clamp around only one conductor.
Single-phase (2-wire) or three-phase (3-wire) cables clamped together will not produce any reading.
OK NO NO
When blinks
The measured value exceeds maximum display counts. Increase
NO
OK
52
NO
NO
NO
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RESET
####
VERSION
RESET
####
COPY: MEAS̲ dBm
メモリデータなし
断線（Ｋ熱電対）
VERSION
TEMP F
断線（Ｋ熱電対）
電源遮断
4-20 mA (0-20 mA) % Conversion
TEMP F
電源遮断
3.13 4-20 mA (0-20 mA) % Conversion
The 4-20 mA (or 0-20 mA) signal of the instrumentation system can be converted to 0% to 100% and checked.
• 4 mA - 20 mA → 0% - 100%
(An input exceeding 20 mA is displayed up to a maximum of 350%.)
• 0 mA - 20 mA → 0% - 100%
(An input exceeding 20 mA is displayed up to a maximum of 300%.)
1
2
Two-wire transmitter
4-20 mA
24 V
Sensor Output signal
1
2
3
4
Red
4
3
Black
Distributor 5
TEMP C
０−２０mA
1 Turn on the power while pressing .
2 / (Select a desired value.)
3 (Confirm the value.)
The regular display reappears.
Even after the power is turned off, the setting is retained.
6
7
ブザーＯＦＦ
COPY: MEAS̲ 4-20
０−２０mA
OVER
53
メモリデータなし
OVER 最大入力範囲超え
メモリデータクリア
過負荷検出
ブザーＯＦＦ
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RANGE HOLD
オートパワーセーブＯＦＦ
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SLOW MAX REL ΔＴ
4
Using Instrument Conveniently
COPY: MEAS̲ dBm
OVER 最大入力範囲超え
SLOW dBV
MEM
過負荷検出
交流電流 ( クランプ入力 )
4
Using Instrument
Conveniently
4.1 Selecting the Measurement Range
Auto or Manual range can be selected. In the case of measurement where the desired range can be selected, [ RANGE: ] lights up in the bottom left of the display.
• Auto range Sets the optimum range automatically in accordance with the actual measurement.
• Manual range Sets the range and fixes it specifically.
Measuring with the auto range
READ
4-20
抵抗
1
2
3
4
When the manual range is set, pressing for at least 1 second changes to the auto range.
The instrument automatically selects the optimum measurement range.
5
COPY: MEAS̲DCA
6
Press .
Each time the key is pressed, a higher range is specified.
When the key is pressed at the highest range, the lowest range is specified once again.
Example: When measuring the AC voltage
60 mV 600 mV 600 V 1000 V
0adj 後
7
When the measurement function is switched using the rotary switch or
SHIFT , or when the peak measurement is canceled, the auto range is enabled.
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Selecting the Measurement Range
Range display list
ACV, DCV
DC+ACV
Ω
60 mV, 600 mV, 6 V, 60 V, 600 V, 1000 V
6 V, 60 V, 600 V, 1000 V
60 Ω , 600
600 M Ω
Ω , 6 k Ω , 60 k Ω , 600 k Ω , 6 M Ω , 60 M Ω ,
(Electrostatic capacity)
DCA, ACA
AC clamp
1 nF, 10 nF, 100 nF, 1 μF, 10 μF, 100 μF, 1 mF, 10 mF,
100 mF
600 µA, 6000 μA, 60 mA, 600 mA, 6 A, 10 A
10 A, 20 A, 50 A, 100 A, 200 A, 500 A, 1000 A
PEAK (DCV)
PEAK (ACV)
6 V, 60 V, 600 V, 1000 V
18 V, 180 V, 1500 V
PEAK (DC+ACV) 18 V, 180 V, 1500 V
PEAK (DCA/ACA) 1200 µA, 12000 µA, 120 mA, 1200 mA, 12 A, 15 A
PEAK (AC clamp) 30 A, 60 A, 150 A, 300 A, 600 A, 1500 A, 3000 A
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COPY: MEAS̲ dBm
SLOW dBV
MEM
OVER 最大入力範囲超え 過負荷検出
交流電流 ( クランプ入力 )
MAX
クランプ（レンジ設定）
COPY: MEAS̲ 4-20
READ
RANGE
導通ショート
REL
マニュアルレンジ
Retaining the Measured Value
4.2 Retaining the Measured Value
The measured value is retained manually or automatically.
• Manually When HOLD is pressed, the measured value is retained.
• Automatically When HOLD is pressed and held for at least 1 second, auto mode starts. When the measured value stabilizes, it is retained.
1
2
3
FILTER To retain the measured value, press . ( lights up and the measurement value is retained.)
(
To cancel the hold state, press it again.
goes off.)
Automatically retaining the measured value when the value stabilizes (AUTO HOLD)
ΔＴ
オートホールド
4
5
(
Press for at least 1 second.
lights up.)
(
When the measured value stabilizes, a beeping sound is generated and the value is retained.
lights up.)
If HOLD is pressed again, or the input signal exceeds the dead zone threshold again (see table on the next page), or when the range is switched internally and the measured value is stabilized once again, the hold state is canceled. ( goes off.)
To disable the auto hold function, press it for at least 1 second again. ( goes off.)
57
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Retaining the Measured Value
• If the input signal is too small for the relevant range (dead zone threshold p. 58), the measured value cannot be automatically retained.
• If the difference between the current and previous measured values remains less than the counts in the stable field of the table below, the instrument determines the current value has stabilized.
Dead zone threshold
Function
AC voltage
DC voltage
DC voltage + AC voltage
Continuity check
Diode test
Resistance
Conductance
DC
µA mA
A
AC
µA mA
A
AC (clamp input)
* No function is available for the mV range.
Stable (count)
1200, 200
(1000 V range)
1200, 200
(1000 V range)
1200, 200
(1000 V range)
100
80
1200, 120
(60/600M Ω range)
1200
1200
1200
1200, 200
(10 A range)
1200
1200
1200, 200
(10 A range)
5% of the range
58
Dead zone threshold
(count)
1200, 200
(1000 V range) *
1200, 200
(1000 V range) *
1200, 200
(1000 V range)
5900
3520
58800, 5880
(60/600M Ω range)
1200
1200
1200
1200, 200
(10 A range)
1200
1200
1200, 200
(10 A range)
5% of the range
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When the Measured Value Fluctuates (SLOW)
4.3 When the Measured Value
Fluctuates (SLOW)
COPY: MEAS̲ 4-20
When the measured value fluctuates and cannot be read, it is possible to stabilize the value. (When is lit)
• When is off (normal): refer to the display update rate
(p. 80) (Default setting)
• When is lit (slow): five times normal (average of 5 times)
OVER 最大入力範囲超え 過負荷検出 RANGE
1
2
3
(
Press
lights up.)
for at least 1 second.
4
(
To cancel the state, press it for at least 1 second again.
goes off.)
MAX REL SLOW
When the measurement function is switched using the rotary switch or SHIFT , the SLOW setting is disabled.
5
6
7
OVER レンジオーバー
HOLD
ΔＴ
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MEM
交流電流 ( クランプ入力 )
クランプ（レンジ設定）
READ
導通ショート
マニュアルレンジ
Removing the Harmonic Components of the Inverter (FILTER)
4.4 Removing the Harmonic
Components of the Inverter
(FILTER)
WARNING
To prevent electric shock, before setting the filter function, confirm if there is a voltage or not with the filter function disabled (OFF).
Remove the harmonic components when measuring the inverter output.
This function can be used when measuring the AC voltage or
AC+DC voltage. The cut-off frequency is 630 Hz.
(
Press for at least 1 second.
lights up .
)
(
To cancel the state, press it for at least 1 second again.
goes off.)
FILTER
Only 600V/1000V range.
抵抗
When the measurement function is switched using the rotary switch or SHIFT , the filter function is canceled.
When measuring voltage with a 400 Hz fundamental frequency (such as that on an aircraft), be aware that the FILTER function may cause attenuation and the indicated voltage may be 20% lower than the actual voltage.
The characteristics of the FILTER function
(low pass filter) are shown in the graph.
0dB
-10dB
-20dB
-30dB
-40dB
10Hz
60
100Hz 1000Hz 10000Hz
オートホールド 0adj 後
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MAX
Checking the Maximum/Minimum Value (MAX/MIN)
4.5 Checking the Maximum/Minimum
Value (MAX/MIN)
The maximum/minimum value after start of the measurement can be checked.
MAX
Press .
Each time the key is pressed, the display is changed in the order of the maximum value
(MAX), minimum value (MIN), and current value.
MIN
A buzzer sounds when the maximum value is updated with MAX displayed or the minimum value is updated with MIN displayed.
1
2
3
4
MIN
The maximum and minimum values are for the displayed value; they do not relate to peak values such as AC signals.
The main and sub displays update their maximum and minimum values individually.
5
6
Clearing the existing maximum/minimum value
When MAX or MIN appears, press .
Both maximum and minimum values are cleared.
After this, the maximum and minimum measurement values after clearing the previous ones are retained.
When saving to memory, only the value displayed on the screen (current value, maximum value, or minimum value) can be saved.
61
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Checking the Peak Value (V • A PEAK)
4.6 Checking the Peak Value (V • A
PEAK)
After starting the voltage/current peak measurement, the maximum/ minimum instantaneous value can be checked.
The peak measurement can be performed only with the manual range. Press RANGE to select the appropriate range before starting the measurement. (For the range configuration and display range, see page 84)
COPY: MEAS̲ACV COPY: MEAS̲DCV COPY: MEAS̲ DC+ACV
PEAK
Maximum instantaneous value
Minimum instantaneous value
Press .
The maximum/minimum instantaneous value can be retained, from the point at which
is pressed.
To cancel the display of the peak value, press it again.
A buzzer sounds when PEAKmax or PEAKmin is updated.
Clearing the maximum/minimum instantaneous value
Press .
The maximum/minimum instantaneous value can be displayed, from the point at which is pressed.
温度ＴＥＭＰ COPY: MEAS̲DCuA
COPY: MEAS̲DC-ACV
コンダクタンス（Ｓ）
交流電流ＡＣＡ
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COPY: MEAS̲ dBm
COPY: MEAS̲ dBm
OVER 最大入力範囲超え
OVER 最大入力範囲超え
SLOW MAX dBV
REL
Checking the Relative Value/Performing Zero Adjustment
4.7 Checking the Relative Value/
Performing Zero Adjustment
The relative value comparing to the standard value can be checked
(relative function).
It can also be used as the zero adjustment function.
Zero adjustment eliminates the influences of the wiring resistance
(resistance measurement) and the wiring capacity (capacitor measurement).
When the following measurement function is selected, this function is disabled.
OVER レンジオーバー
Peak measurement, Continuity, Diode, dBm/dBV, 4-20 mA
The measurement range cannot be changed when [REL] is lit. To change the range, press REL for at least 1 second to reset the
REL function.
Checking the relative value (REL)
OVER
RANGE
When the standard value is measured,
( press
lights up) .
for at least 1 second
To cancel the state, press it for at least 1 second again. ( goes off.)
Example 2: Temperature measurement
When measuring temperature, [REF] lights up and a standard temperature appears in the sub display.
Deviation from the standard temperature
Standard temperature
1
2
3
4
5
6
7
ΔＴ 63
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1
2
1
2
3
Checking the Relative Value/Performing Zero Adjustment
Performing zero adjustment
5 varies depending on the measurement function.
3
4 6
7
3
4
64
4
4
4
5 Black
Black
V, A, Ω
5
6 Short circuit
2
Red
6
3
, nS
Open
8
Example 1: Resistance
7
1 Select the measurement function.
2 8
3 Allow the test leads to short circuit.
4
9
for at least
1 second.
(After zero adjustment: 0.000 Ω )
5 Measure the resistance.
7
2
Red
1
3
Example 2: Capacitor measurement
1 Select the measurement
8
9 function.
Connect the test leads to the measurement terminals.
3 Allow the test leads to open.
4 Press for at least
1 second.
(After zero adjustment: 0.000 nF)
5 Measure the capacitor.
2
1
2
1
3
2
1
3
3
4
4
4
5
5
6
5
7
6
8
9
6
10
7
7
8
9
10
8
9
10
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Using the Memory Function
4.8 Using the Memory Function
The measurement result can be saved and read using the memory function. Up to 400 data can be saved. Data can also be deleted arbitrarily.
The saved data can be imported to the PC using the DT4900-01
Communication Package (optional).
####
Memory No.
MEM
メモリデータなし
交流電流 ( クランプ入力 )
1
2
TEMP F
1 Press ( lights up) .
Memory mode starts.
This function applies until the power is turned off.
The memory No. appears (only for the
電源遮断
3
4
2 Select the memory No. to be saved using / .
When the key is pressed and held, the memory No. can be incremented/
FILTER
5
6
3 Press to save the
ブザーＯＦＦ 7
When the measured value is saved, the memory No. for which the value is to be saved next appears.
Even when the power is turned off, the dBm インピーダンス変更
TEMP C
０−２０mA
抵抗
オートパワーセーブＯＦＦ
COPY: MEAS̲DCA
65
クランプ（レンジ設定） マニュアルレンジ オートホールド 0adj 後
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Using the Memory Function
• If the memory No. for which the data have already been saved is selected, [ ] appears.
• When MEM is pressed, the data are overwritten.
• When the value is saved with memory No. “400” displayed, a buzzer sounds and “FULL” appears in the display, and then “001” reappears.
] (data reading) is displayed, it is not possible to save the • When [ value.
• The current value, maximum value (MAX), minimum value (MIN), instantaneous maximum value (Peak max), and instantaneous minimum value (Peak min) cannot be saved simultaneously. Only the displayed numeric value can be saved.
• The continuity check data and the diode test data cannot be saved.
When both hands cannot be used during measurement
Enable the auto hold function. After the measured value is retained automatically, press MEM to save the data.
Items to be saved per data
• Function
• Measurement range
• Measured value in the main display
• Measured value in the sub display
• Whether or not the REL function is executed
• Filter ON/OFF
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MEM
交流電流 ( クランプ入力 )
クランプ（レンジ設定）
Using the Memory Function
Reading the memory data (READ)
RESET
####
Memory No.
READ
1 Press
Read mode starts.
( lights up) .
2 Select the desired memory No. using / .
TEMP F
Only the memory Nos. corresponding to saved
抵抗
Canceling the read mode
(
Press READ again or turn the rotary switch.
goes off.)
断線（Ｋ熱電対） 電源遮断
導通ショート
メモリデータなし
1
2
3
4
When no memory data exist
The relevant message appears and then the regular measurement display reappears.
メモリデータクリア
5
6
ブザーＯＦＦ
7
マニュアルレンジ オートホールド 0adj 後
TEMP C
０−２０mA
オートパワーセーブＯＦＦ
67
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RESET
MEM
####
交流電流 ( クランプ入力 )
メモリデータなし
クランプ（レンジ設定）
Using the Memory Function
Clearing the memory data (CLEAR)
Memory No.
VERSION
1 Press
Read mode starts.
( lights up) .
2 Select the No. to be cleared using
/ .
TEMP C
READ
3 Press
FILTER
.
抵抗
導通ショート
メモリデータクリア
マニュアルレンジ
電源遮断 ０−２０mA
1 Turn on the power while pressing
.
dBm インピーダンス変更
2 Press again within 3
All memory data are now cleared.
オートパワーセーブＯＦＦ
When 3 seconds elapse without pressing
CLEAR , all memory data are not cleared and the regular display reappears.
0adj 後
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Muting the Buzzer
4.9 Muting the Buzzer
The buzzer sound can be disabled.
Note, however, that the buzzer cannot be muted in the following cases.
Continuity check, diode test, and overload warning (only for the maximum value)
Turn on the power while pressing
When
.
is released, the regular display appears ( goes off).
Canceling the buzzer mute function
Turn on the power again while pressing .
When is released, the regular display appears ( lights up).
Even after the power is turned off, the buzzer setting is retained.
4.10 Turning On the Backlight
The backlight can be turned on/off by pressing .
When PC communication is started, the backlight is turned off forcibly.
Enabling/disabling the automatic deactivation of the backlight
Turn on the power while pressing .
Even after the power is turned off, the automatic backlight deactivation setting is retained.
Automatic deactivation
Enable
自動消灯解除 Disable 自動消灯
• When the automatic deactivation setting is enabled (on), the backlight goes off automatically, approximately 40 seconds after the backlight comes on.
• When the automatic deactivation setting is cancelled (oFF) and the auto power save function is disabled, if the instrument has not been operated for 3 minutes, the backlight
自動消灯解除
69
1
2
3
4
5
6
7
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RESET
####
VERSION
断線（Ｋ熱電対）
メモリデータなし メモリデータクリア
TEMP F
電源遮断
ブザーＯＦＦ
Using the Auto Power Save (APS)
4.11 Using the Auto Power Save (APS)
The auto power save function saves on power consumption. If the instrument has not been operated for approx. 15 minutes, it enters the sleep mode. (When the instrument is in the sleep mode, press any key or turn the rotary switch to recover from the sleep mode.)
When the sleep mode continues for approx. 45 minutes, the power turns off automatically.
Before shipping (as one of the default settings), the auto power save function is set to enabled. ( lights up)
It is also possible to disable the auto power save function.
At 30 seconds before the instrument enters the sleep mode, the
APS blinks to indicate its status. To continuously use the instrument, press any key or turn the rotary switch.
After use, set the rotary switch to OFF. The auto power save function consumes a small amount of current.
Recovering from the power off state
Set the rotary switch to OFF and turn on the power again.
(When the current measurement is used, disconnect the measurement cable and then turn on the power again.)
オートパワーセーブＯＦＦ
Turn on the power while pressing
.
When appears.
(APS goes off.)
is released, the regular display
This function is disabled until the power is turned off.
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Using Plus/Minus Judgment Function for Measurement Value
4.12 Using Plus/Minus Judgment
Function for Measurement Value
If the measured DC voltage falls below the following standard value, a buzzer sounds and the backlight lights up red.
This function is useful for checking for any incorrect connection of the DC power.
Standard value: -10 V or less
Measurement function: DCV
“Enabling/disabling the Plus/Minus judgment function” (p. 78)
1
2
3
4
5
6
7
71
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Communicating with PC
4.13 Communicating with PC
Using the optional DT4900-01 Communication Package, it is possible to transmit data to the PC or to control the instrument.
For details, see the Instruction Manual which accompanies the communication package.
Install the special software on the PC.
(See the Instruction Manual which accompanies with the communication package.)
Dedicated Software (p. Appx.4)
Attaching the USB cable to the instrument (p. 73)
Connect to the PC.
The virtual COM ports of the PC can be used as the USB interface.
• Communication method: Start-stop system, half-duplex transmission
• Baud rate:
• Stop bit:
19,200 bps fixed
8 bits
1 bit
• Parity:
• Delimiter:
None
CR+LF
Transmits data.
Controls the instrument.
72
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Communicating with PC
Attaching the communication adapter to the instrument
3
4, 5
USB cable
6
Communication adapter
Communication port
1, 2
1 Using a Phillips screwdriver, remove the screws (2 locations) from the battery cover.
2 Remove the battery cover.
3 Attach the communication adapter.
4 Reattach the battery cover.
5 Secure the battery cover with the screws.
6 Connect the
USB cable to the communication adapter.
1
2
3
4
5
6
•
• Connect the cables, being careful to orient each cable correctly.
• During communication,
When disabled.
appears in the display.
is lit, the operation keys of the instrument is
• During communication, do not disconnect the USB cable.
Disconnecting the cable stops the communication. In that case, a warning is displayed by the PC software. Connect the cable again.
• It is possible to use the instrument while the communication adapter is attached, however, the communication adapter is excluded from the drop-proof.
7
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RESET
####
Setting and Checking the System
4.14 Setting and Checking the System
Checking that all indicators are displayed
Check that there is no missing indicator.
If any indicator is missing, stop using the instrument and send it for repair.
Turn on the power while pressing
.
When appears.
is released, the regular display
Checking the software version of the instrument
For repair or calibration, check the version if necessary.
Example: Ver 1.00
Turn on the power while pressing
.
VERSION
When appears.
is released, the regular display
TEMP F TEMP C
74
断線（Ｋ熱電対） 電源遮断 ０−２０mA
メモリデータなし メモリデータクリア ブザーＯＦＦ オートパワーセーブＯＦＦ
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RESET
####
メモリデータなし
VERSION
断線（Ｋ熱電対）
メモリデータクリア
Setting and Checking the System
Changing the temperature display unit
The units of temperature (°C or °F) can be changed.
電源遮断
1
1 Turn on the power while pressing
and simultaneously.
2 Press for at least 3
2
3 Change the unit of the temperature using .
4 Press setting.
to determine the
3
4
5
The setting of the temperature unit is retained even after the power is turned off.
6
7
ブザーＯＦＦ オートパワーセーブＯＦＦ
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Resetting the System
4.15 Resetting the System
The system is returned to the state before shipping. The power-on option setting is also reset.
The memory data are not reset. To clear the memory data, clear the data individually for each memory No. (p. 68) or clear all data
(p. 68). The temperature unit is not reset, either.
RESET
1 Turn on the power while pressing
and .
2 Within 3 seconds, press again.
After [CLr] blinks, the system returns to the state before shipping.
TEMP F
If the instrument is not operated for 3 seconds, the system is not reset but the regular display reappears.
Table of default settings
Setting item
Filter function
Relative function
Default setting
Disabled
Disabled
Display
電源遮断
Display hold
Range
Auto hold
Maximum/Minimum value
Peak value
Auto power save function
Automatic backlight deactivation
Buzzer
Disabled
AUTO
Disabled
Disabled
Disabled
Enabled
Off
Enabled [
[
[
] is lit.
] is lit.
] is lit.
ブザーＯＦＦ dBm standard impedance
Temperature display unit
Plus/Minus Judgment Function for Measurement Value
76
°C
Ω
Disabled
TEMP C
０−２０mA
オートパワーセーブＯＦＦ
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Power-on Option Table
4.16 Power-on Option Table
The settings in the instrument can be changed or checked.
After changing the setting, the regular display then reappears.
+
Turn on the power while pressing the operation key.
(Turn the rotary switch from OFF.)
Setting change
Canceling the auto power save function
(APS)
Buzzer
(ON/OFF)
([
Method
([APS] goes off.)
Ref.
p. 70
] lights up/goes off.) p. 69
Automatic backlight deactivation setting
Automatic deactivation disabled:
[oFF], [bL-A]
Automatic deactivation enabled:
[on], [bL-A] p. 69
1
2
3
4
5
Clearing all memory data
System reset
Press this within
3 seconds.
p. 68
6
Press this within
3 seconds.
p. 76
7
Standard impedance setting (dBm measurement)
Select the desired setting.
Confirm the change.
p. 41
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Power-on Option Table
Setting change
Switching to
4-20 mA/
0-20 mA
Displaying all indicators
Checking the version
Method
Select the desired setting.
Ref.
Confirm the change.
p. 53 p. 74 p. 74
Switching the temperature unit
Select the desired setting.
Confirm the change.
Displaying the serial number
When
3 seconds or more p. 75
Serial No. display (9 digits)
1st to 4th digits: Main display
5th to 9th digits: Sub display
is released, the regular display appears.
Enabling/ disabling the
Plus/Minus judgment function p. 71
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5
Specifications
5
Specifications
5.1 Electrical Characteristics
AC measurement system
Noise suppression
•
True RMS measurement
NMRR DCV, -60 dB or less (50 Hz/60 Hz)
• CMRR DCV, -120 dB or less
(DC/50 Hz/60 Hz, 1 k Ω unbalance)
• CMRR ACV, -60 dB or less
(DC/50 Hz/60 Hz, 1 k Ω unbalance)
Response time
• Power ON time: within 2 seconds
(When the range does not move until the measured value is displayed in the screen)
*1 *2
• DCV Within 1 second
• ACV Within 3 seconds
• Ω Within 2 seconds
• Ω Within 2 seconds
Within 1.5 seconds
Within 8 seconds
Within 3 seconds
Within 3 seconds
(0 V → 100 V auto range operation)
(0 V → 100 V auto range operation)
(Infinity → 0 Ω auto range operation)
(0 Ω → 30 M Ω auto range operation)
*1: Until the value comes in the range of the accuracy specification
*2: Until the displayed value stabilizes (within ±2 counts)
3
6
7
1
2
4
5
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Electrical Characteristics
Display update rate
• V, Continuity,
Frequency, A, dBm, dBV: 5 times/s
• Electrostatic capacity
Ω , nS, Diodo, Clamp,
0.05 to 5 times/s (varies depending on the measured value)
• Temperature 1 time/s (including disconnection check)
• Peak measurement Up to 155 times/s when peak value is updated
• DC+ACV 2.5 times/s
Input impedance See “Accuracy Table” (p. 81).
Overload protection
• Ω
Function
• ACV, dBm, dBV, Hz,
AC clamp (DT4281)
•
• DCV
DC+ACV, Hz
• Continuity check, diode test
, temperature (K)
•
• Electrostatic capacity nS (DT4282)
• DCμA, ACμA, DCmA,
ACmA, (4-20mA)%, Hz
• DCA (DT4282),
ACA (DT4282), Hz
Overload protection
•
1100 V DC/AC (50/60 Hz) or 2 × 10 7 whichever is the lower value
Voltage applied for 1 minute
• Transient overvoltage 8000 V
V • Hz,
1000 V DC/AC or 2 × 10 7 the lower value
V • Hz, whichever is
• Voltage applied for 1 minute
• Current steady state under overload 15 mA or less
• Current transient state under overload 0.8 A or less
630 mA/1000 V fuse
Breaking capacity 50 kA AC/30 kA DC
11 A/1000 V fuse
Breaking capacity 50 kA AC/30 kA DC
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Accuracy Table
5.2 Accuracy Table
Guaranteed accuracy period 1 year
Regulated power supply range Until the power shutdown (3.8 V ± 0.2 V)
Temperature and humidity for guaranteed accuracy
Temperature characteristic
23°C ± 5°C (73°F ± 9°F), 80%RH or less
(non-condensating)
Adds “Measurement accuracy × 0.1/°C”
(except 23°C ± 5°C (73°F ± 9°F))
Comply with the temperature characteristic in the applicable accuracy table if individually specified.
Other conditions: For information related to the L4931 extension cable set
(coupled 2 cables, 3 m), see the accuracy table.
• rdg. (reading or displayed value): The value currently being measured and displayed on the measuring instrument.
• dgt. (resolution): The smallest displayable unit, i.e., the input value that causes the digital display to show a “1”.
1 AC voltage (V AC, mV AC)
Accuracy
Range 20 to below 45
[Hz]
45 to 65
[Hz]
Over 65 to 1 k
[Hz]
Over 1 k to 10 k
[Hz]
Over 10 k to 20 k
[Hz]
Over 20 k to 100 k
[Hz]
±0.4% rdg.
±40 dgt.
±0.6% rdg.
±40 dgt.
±0.9% rdg.
±40 dgt.
±1.5% rdg.
±40 dgt.
±20% rdg.
±80 dgt.
±0.4% rdg.
±40 dgt.
±0.6% rdg.
±40 dgt.
±0.9% rdg.
±40 dgt.
±1.5% rdg.
±40 dgt.
±8% rdg.
±80 dgt.
±0.2% rdg.
±25 dgt.
±0.3% rdg.
±25 dgt.
±0.4% rdg.
±25 dgt.
±0.7% rdg.
±40 dgt.
±3.5% rdg.
±40 dgt.
±0.2% rdg.
±25 dgt.
±0.3% rdg.
±25 dgt.
±0.4% rdg.
±25 dgt.
±0.7% rdg.
±40 dgt.
±3.5% rdg.
±40 dgt.
±0.2% rdg.
±25 dgt.
±0.3% rdg.
±25 dgt.
±0.4% rdg.
±25 dgt.
Not specified
Not specified
±0.2% rdg.
±25 dgt.
±0.3% rdg.
±25 dgt.
±0.4% rdg.
±25 dgt.
Not specified
Not specified
81
1
2
3
4
5
6
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Accuracy Table
Input impedance
Crest factor
Accuracy specification range
DC superimposition
1 M Ω ±4%, 100 pF or less
3 or less
(For the 60.000 mV/ 600.00 mV/ 1000.0 V range, 1.5 or less for 100% of the input of the range
3 or less for 50% of the input of the range)
5% or more of each range (less than 5% of each range is outside of the guaranteed accuracy)
With the filter ON, the accuracy is specified in 100
Hz or less. Furthermore, 2% rdg. is added.
Frequency range: 20 Hz to 100 kHz (A measured value outside of the accuracy guarantee range for frequency is also displayed.)
• For the superimposition on 200 V DC or less, see the accuracy table.
• For the superimposition on over 200 V DC to 500
V DC or less, 2% rdg. is added to the accuracy specification in 1 kHz or less.
• For the superimposition on over 500 V DC, 10% rdg. is added to the accuracy specification in 1 kHz or less.
2 DC voltage (V DC, mV DC)
Range Accuracy
60.000 mV ±0.2% rdg. ±25 dgt.
*1
600.00 mV ±0.025% rdg. ±5 dgt.
*1
6.0000 V
60.000 V
600.00 V
1000.0 V
±0.025% rdg. ±2 dgt.
±0.025% rdg. ±2 dgt.
±0.03% rdg. ±2 dgt.
±0.03% rdg. ±2 dgt.
Input impedance
1G Ω or more: 100 pF or less
1G Ω or more: 100 pF or less
11.0M
Ω ±2%: 100 pF or less
10.3M
Ω ±2%: 100 pF or less
10.2M
Ω ±2%: 100 pF or less
10.2M
Ω ±2%: 100 pF or less
*1: After leaving the instrument in an environment where the ambient air temperature has been stable for at least 30 minutes, allow the input to short circuit and activate the relative value display function (REL). The accuracy is then specified. After activating the REL, the temperature fluctuates within ±5°C.
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Accuracy Table
3 DC+ACV measurement
Range
60.000 V
600.00 V
1000.0 V
20 to below 45
[Hz]
Not specified
Not specified
Not specified
45 to 65
[Hz]
±0.3% rdg.
±30 dgt.
±0.3% rdg.
±30 dgt.
±0.3% rdg.
±30 dgt.
±0.3% rdg.
±30 dgt.
Accuracy
Over 65 to 1 k
[Hz]
Over 1 k to 10 k
[Hz]
Over 10 k to 20 k
[Hz]
Over 20 k to 100 k
[Hz]
±0.4% rdg.
±30 dgt.
±0.4% rdg.
±30 dgt.
±0.4% rdg.
±30 dgt.
±0.4% rdg.
±30 dgt.
±0.4% rdg.
±30 dgt.
±0.4% rdg.
±30 dgt.
±0.4% rdg.
±30 dgt.
±0.4% rdg.
±45 dgt.
±1.5% rdg.
±45 dgt.
±1.5% rdg.
±45 dgt.
Not specified
Not specified
±3.5% rdg.
±125 dgt.
±3.5% rdg.
±125 dgt.
Not specified
Not specified
Input impedance
Crest factor
Auto range
1 M Ω ±4%, 100 pF or less
3 or less
(For the 1000.0 V range, 1.5 or less for 100% of the input of the range, 3 or less for 50% of the input of the range)
The range moves depending on the DC+AC calculation result.
Accuracy specification range
5% or more of each range (less than 5% of each range is outside of the guaranteed accuracy)
With the filter ON, the accuracy is specified in 100
Hz or less. Furthermore, 2% rdg. is added.
Frequency range: 20 Hz to 100 kHz (A measured values outside of the accuracy guarantee range for frequency is also displayed.)
Accuracy of DCV (main display) and ACV (sub display) when SHIFT is pressed during DC+ACV measurement
1. DCV (main display): the accuracy of 45 Hz to 65 Hz in the accuracy table is applied. Note however that 2%rdg. should be added when there is AC voltage superimposition less than 45 Hz.
2. ACV (sub display): according to the accuracy table
1
2
3
4
5
6
7
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Accuracy Table
4 Peak measurement
(At the time of ACV, DCV, DC+ACV, Clamp, DCµA, DCmA, DCA, ACμA,
ACmA, ACA)
Main measurement
DCV
Signal width Accuracy
Other than
DCV
4 ms or more (single)
1 ms or more (repeated)
±2.0% rdg. ±40 dgt. *1
±2.0% rdg. ±100 dgt. *2
1 ms or more (single) ±2.0% rdg. ±40 dgt. *3, *4
250 μs or more (repeated) ±2.0% rdg. ±100 dgt.
*4, *5
*1: The accuracy is specified via the 5 V/4 ms single signal.
*2: The accuracy is specified at the peak value of 40000 counts/25 Hz sine wave.
*3: The accuracy is specified via the 5 V/1 ms single signal. (ACV, DC+ACV)
*4: The accuracy is specified at the peak value of the Max. counts/100 Hz sine wave in the main measurement range. (AC measurement)
*5: The accuracy is specified at the peak value of 40000 counts/100 Hz sine wave in the main measurement range. (DC measurement, 7 A/100 Hz for the 10 A range)
Maximum input range
Voltage measurement range
6.0000 V
60.000 V
600.00 V
1000.0 V
DCV
6.000 V
60.00 V
600.0 V
1000 V
*1: Up to 1000 V for the RMS
Peak measurement range
ACV DC+ACV
18.000 V
180.00 V
1500.0 V *1
None
18.000 V
180.00 V
1500.0 V *1
None
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Accuracy Table
Current measurement range
600.00 µA
6000.0 μA
60.000 mA
600.00 mA
Peak measurement range
DCA/ACA
1200.0 µA
12000 μA
120.00 mA
1200.0 mA
6.0000 A (DT4282) 12.000 A *3
10.000 A (DT4282) 15.00 A *3
*2 *2: Up to 600 mA for the
RMS
*3: Up to 10 A for the
RMS
AC clamp measurement range (DT4281)
10.00 A
20.00 A
50.00 A
100.0 A
200.0 A
500.0 A
1000 A
Peak measurement range
30.00 A
60.00 A
150.0 A
300.0 A
600.0 A
1500 A
3000 A
5 Continuity check
Range Accuracy
600.0
Ω ±0.5% rdg. ±5 dgt.
Measurement current
640 µA ±10%
Open circuit voltage 2.5 V DC or less
Continuity threshold 20 Ω (default) / 50 Ω / 100 Ω / 500 Ω
Threshold setting tolerance ±1% setting±0.5 Ω
Response time Open circuit or short circuit is detected for at least 10 ms.
85
1
2
3
4
5
6
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Accuracy Table
6 Diode test
Range
3.600 V
Accuracy
±0.1% rdg. ±5 dgt.
Measurement current
1.2 mA or less
Open circuit voltage 4.5 V DC or less
If the reading is lower than the threshold during the forward connection, a buzzer sounds and red backlight comes on.
When the reading exceeds the threshold by 0.01 V or more during the forward connection, the buzzer stops and the red backlight turns off.
Forward threshold 0.15 V/ 0.5 V (default)/ 1 V/ 1.5 V/ 2 V/ 2.5 V/ 3 V)
Threshold setting tolerance ±1% setting±0.005 V
7 Resistance (
Ω
)
Range Accuracy
60.000
Ω
600.00
Ω
±0.3% rdg. ±20 dgt. *1
±0.03% rdg. ±10 dgt. *1
6.0000k
Ω ±0.03% rdg. ±2 dgt. *1
60.000k
Ω ±0.03% rdg. ±2 dgt. *1
600.00k
Ω ±0.03% rdg. ±2 dgt.
6.0000M
Ω ±0.15% rdg. ±4 dgt.
60.00M
Ω
600.0M
Ω
±1.5% rdg. ±10 dgt. *2
±3.0% rdg. ±20 dgt. *2, *3
±8.0% rdg. ±20 dgt. *2, *4
Measurement current
640 µA ±10%
640 µA ±10%
96 µA ±10%
9.3 µA ±10%
0.96 µA ±10%
96 nA ±10%
96 nA ±10%
96 nA ±10%
*1: Allow the input to short circuit and activate the relative value display function (REL). The accuracy is then specified.
*2: The accuracy is specified for humidity 60%RH or less.
*3: The accuracy is specified for 200.00 M Ω or less.
*4: The accuracy is specified for more than 200.00 M Ω .
Open circuit voltage 2.5 V DC or less
Maximum capacity load 100 mF
Maximum inductive load 10 H
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Accuracy Table
8 Conductance (nS)
Range
600.00 nS
Accuracy
±1.5% rdg. ±10 dgt.
Measurement current
96 nA ±10%
•
• The accuracy is specified for humidity 60%RH or less.
For more than 300 nS, ±20 dgt. is added.
• The accuracy is specified in 20.00 nS or more.
Open circuit voltage 2.5 V DC or less
Maximum capacity load 100 mF
Maximum inductive load 10 H
9 Electrostatic capacity
Range Accuracy *2
1.000 nF
10.00 nF
100.0 nF
1.000 µF
±1% rdg. ±20 dgt. *1
±1% rdg. ±5 dgt. *1
±1% rdg. ±5 dgt. *1
±1% rdg. ±5 dgt.
10.00 µF
100.0 µF
±2% rdg. ±5 dgt. *3
±2% rdg. ±5 dgt. *3
1.000 mF ±2% rdg. ±5 dgt. *3
10.00 mF ±2% rdg. ±5 dgt. *3
100.0 mF ±2% rdg. ±20 dgt. *3
Measurement current
32 μA ±10%
32 μA ±10%
32 μA ±10%
32 μA ±10%
680 μA ±20%
680 μA ±20%
680 μA ±20%
680 μA ±20%
680 μA ±20%
Open circuit voltage
2.5 V DC or less
2.5 V DC or less
2.5 V DC or less
2.5 V DC or less
3.1 V DC or less
3.1 V DC or less
2.1 V DC or less
2.1 V DC or less
2.1 V DC or less
•
*1: In the case of the 100 nF range or less, the accuracy is specified after the
REL function is activated.
*2: The accuracy is specified in 0.22 nF or more.
*3: Adds “Measurement accuracy × 0.3/°C” (except 23°C ± 5°C)
• When the manual range is set, the accuracy is specified in 1% or more of the range.
• The accuracy is specified for series resistance of 5 Ω or less.
Maximum count for each range: 1100 (excluding 100.0 mF)
87
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2
3
4
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6
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Accuracy Table
10 Temperature (type K thermocouple)
Range
-40.0 to 800.0°C
-40.0 to 1472.0°F *2
Accuracy *1
±0.5% rdg. ±3°C
±0.5% rdg. ±5.4°F
*1: In an environment where the temperature of the instrument is ±1°C and stable, the accuracy is specified.
*2: Using the power-on option setting, °F display is activated.
Fahrenheit °F = (9/5) × Celsius°C + 32
• The optional type K thermocouple are used.
• The accuracy does not include the error of the type K thermocouple.
• Standard contact temperature compensation stability time
When the instrument environmental temperature fluctuates ±5°C or more:
120 minutes
After current measurement: 30 minutes
11 DC (DCµA, DCmA, DCA)
Range Accuracy Shunt
Fuse resistance
DCµA
DCmA
DCA
(DT4282)
600.00 µA ±0.05% rdg. ±5 dgt.
*1
6000.0 µA ±0.05% rdg. ±5 dgt.
60.000 mA ±0.05% rdg. ±5 dgt.
*1
600.00 mA ±0.15% rdg. ±5 dgt.
6.0000 A ±0.2% rdg. ±5 dgt.
*1
10.000 A ±0.2% rdg. ±5 dgt.
101
101
1
1
Ω
Ω
10m
10m
Ω
Ω
Ω
Ω
Approx.
1.2
0.1 less
Ω
Ω or
*1: Accuracy rule when using the slow display update rate. Add ±20 dgt. when using the normal rate.
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Accuracy Table
12 AC (ACµA, ACmA, ACA)
ACµA
ACmA
ACA *3
Range
[A]
600.00 µ
6000.0 µ
6.0000
10.000
*4
20 to below 45
[Hz]
±1.0% rdg.
±20 dgt.
±1.0% rdg.
±5 dgt.
Not specified
Not specified
45 to 65
[Hz]
Accuracy *1
Over 65 to 1 k
[Hz]
Over 1 k to 10 k
[Hz]
±0.6% rdg.
±20 dgt.
±0.6% rdg.
±5 dgt.
±0.6% rdg.
±20 dgt.
±0.6% rdg.
±5 dgt.
±0.6% rdg.
±20 dgt.
±0.6% rdg.
±5 dgt.
±0.6% rdg.
±20 dgt.
±0.6% rdg.
±5 dgt.
±0.8% rdg.
±20 dgt.
±0.8% rdg.
±20 dgt.
±0.8% rdg.
±5 dgt.
±0.8% rdg.
±5 dgt.
±2% rdg.
±20 dgt.
±2% rdg.
±5 dgt.
±1% rdg.
±20 dgt.
±1.5% rdg.
±10 dgt. *2
Not specified
Not specified
Over 10 k to 20 k
[Hz]
±4% rdg.
±20 dgt.
±4% rdg.
±5 dgt.
±2% rdg.
±20 dgt.
Not specified
Not specified
Not specified
1
2
3
4
5
ACµA
ACmA
ACA *3
Range
600.00 µA
6.0000 mA
60.000 mA
600.00 mA
6.0000 A
10.000 A
Shunt
101 Ω
101 Ω
1 Ω
1 Ω
10 m Ω
10 m Ω
Fuse resistance
Approx. 1.2
Approx. 0.1
Ω
Ω
*1: The accuracy is specified in 5% or more of the range. (Less than 5% of each range is outside of the guaranteed accuracy.)
*2: For more than 300 mA, the accuracy is specified in 5 kHz or less.
*3: Only the DT4282
*4: The accuracy is specified in 2 A or more.
Crest factor 3 or less (Note that it applies to 1/2 of the range.)
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Accuracy Table
Accuracy guarantee range for frequency
20 Hz to 20 kHz
(A measured value outside of the accuracy guarantee range for frequency is also displayed.)
13 AC clamp (DT4281)
Range
10.00 A
20.00 A
50.00 A
100.0 A
200.0 A
500.0 A
1000 A
Accuracy (only the instrument)
The accuracy is specified in 15% or more of the range. (Less than 15% of each range is outside of the guaranteed accuracy.)
40 to 65 [Hz] Over 65 to 1 k [Hz]
±0.6% rdg. ±2 dgt.
±0.6% rdg. ±4 dgt.
±0.6% rdg. ±10 dgt.
±0.6% rdg. ±2 dgt.
±0.6% rdg. ±4 dgt.
±0.6% rdg. ±10 dgt.
±0.6% rdg. ±2 dgt.
±0.9% rdg. ±2 dgt.
±0.9% rdg. ±4 dgt.
±0.9% rdg. ±10 dgt.
±0.9% rdg. ±2 dgt.
±0.9% rdg. ±4 dgt.
±0.9% rdg. ±10 dgt.
±0.9% rdg. ±2 dgt.
Conversion rate
(A/mV)
1.0
2.5
5
0.05
0.10
0.25
0.5
• The optional 9010-50, 9018-50, or 9132-50 clamp-on probe is used.
• For accuracy in combination with the clamp, add the accuracy of the clampon probe.
Input impedance
Crest factor
Accuracy guarantee range for frequency
1 M Ω ±4%, 100 pF or less
3 or less
40 Hz to 1 kHz
(A measured value outside of the accuracy guarantee range for frequency is also displayed.)
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Accuracy Table
14 Frequency (Hz)
(In the case of ACV, DC+ACV, ACµA, ACmA, or ACA)
Range
99.999 Hz
999.99 Hz
9.9999 kHz
99.999 kHz
500.00 kHz
Accuracy
±0.005% rdg. ±3 dgt.
±0.005% rdg. ±3 dgt.
±0.005% rdg. ±3 dgt.
±0.005% rdg. ±3 dgt. *1
±0.005% rdg. ±3 dgt. *1
*1: Measurement range where the accuracy is specified in the range of
99.999 kHz/500.00 kHz
Up to 200 kHz for ACV or ACµA
Up to 50 kHz for DC+ACV
Up to 100 kHz for the range from 60.000 mV AC to 600.00 mV AC
Up to 30 kHz for ACmA or ACA
Measurement range
Pulse width
0.5 Hz or more ( [-----] appears for less than 0.5 Hz.)
1 µs or more (duty ratio: 50%)
• With the filter ON, the accuracy is specified in 100 Hz or less.
• During DC+ACV measurement, it is in accordance with the attenuator range where the input component is large.
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Accuracy Table
Minimum sensitivity voltage (During DC+ACV measurement, it indicates an RMS of the AC component.)
Range
[Hz]
AC voltage range (sine wave)
60.000 mV 600.00 mV 6.0000 V 60.000 V 600.00 V 1000.0 V
99.999
*2,*3
6.000 mV 60.00 mV 0.6000 V 6.000 V 60.00 V 60.0 V
999.99
6.000 mV
9.9999 k 6.000 mV
99.999 k 6.000 mV
60.00mV
0.6000 V 6.000 V
60.00 mV 0.6000 V 6.000 V
60.00 mV 0.6000 V 6.000 V
60.00 V
60.00 V
Not specified
Not specified
60.0 V
60.0 V
Not specified
Not specified
The maximum input is within each range. (The 1000.0 V range depends on the ACV accuracy table)
*2: The minimum sensitivity voltage which is less than 5 Hz is tripled.
*3: With the filter ON, the minimum sensitivity voltage is multiplied by 0.7.
Minimum sensitivity current
Range
[Hz]
AC range (sine wave)
600.00 µA 6000.0 µA 60.000 mA 600.00 mA 6.0000 A 10.000 A
99.999
*4
60.00 µA 600.0 µA 6.000 mA 60.00 mA 0.6000 A 4.000 A
999.99
60.00 µA
9.9999 k 60.00 µA
600.0 µA
600.0 µA
6.000 mA 60.00 mA 0.6000 A 4.000 A
6.000 mA 60.00 mA 0.6000 A 4.000 A
99.999 k 60.00 µA 600.0 µA 6.000 mA
500.00 k 100.00 µA *5 1000.0 µA *5
Not specified
The maximum input is within each range.
*6 60.00 mA
Not specified
*6
Not specified
Not specified
*4: The minimum sensitivity current which is less than 5 Hz is tripled.
*5: Specified in 200 kHz or less.
*6: Specified in 30 kHz or less.
Not specified
Not specified
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Accuracy Table
15 Decibel conversion measurement
Function dBm dBV
Range Standard Standard impedance R
600.00 dBm W ref
= 1 m [W] 4/8/16/32/50/75/93/110/125/135/
150/200/250/300/500/600
(default)/800/900 /1000/1200 Ω
60.00 dBV V ref
= 1 [V] None
Conversion formula (as measured value V (V)) dBm
=
10log
10
V
2
R
W ref
=
10log
10
V
2 ×
1,000
R
dBV
=
20log
10
V
V ref
=
20log
10
V
Accuracy: dBm (when standard impedance is 600 Ω )
Measurement
Range
[dBm]
20 to below 45
[Hz]
45 to 65
[Hz]
Over 65 to 1 k
[Hz]
Over 1 k to 10 k
[Hz]
Over 10 k to 20 k
[Hz]
Over 20 k
to 100 k
[Hz]
-48 to below -21 ±0.8 dBm ±0.5 dBm ±0.5 dBm ±0.5 dBm ±0.6 dBm ±3.0 dBm
-21 to below -1
±0.3 dBm ±0.2 dBm ±0.2 dBm ±0.2 dBm ±0.3 dBm ±1.0 dBm
-1 to below
17
±0.3 dBm ±0.2 dBm ±0.2 dBm ±0.2 dBm ±0.2 dBm ±0.5 dBm
17 to below
37
Not specified
37 to below
57
Not specified
57 to 62 Not specified
±0.2 dBm ±0.2 dBm ±0.2 dBm ±0.2 dBm ±0.5 dBm
Not specified
Not specified
93
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Accuracy Table
Accuracy: dBV
Measurement
Range
[dBV]
20 to below 45
[Hz]
45 to 65
[Hz]
Over 65 to 1 k
[Hz]
Over 1 k to 10 k
[Hz]
Over 10 k to 20 k
[Hz]
Over 20 k
to 100 k
[Hz]
-50 to below -24 ±0.8 dBV ±0.5 dBV ±0.5 dBV ±0.5 dBV ±0.6 dBV ±3.0 dBV
-24 to below -4
±0.3 dBV ±0.2 dBV ±0.2 dBV ±0.2 dBV ±0.3 dBV ±1.0 dBV
-4 to below
15
±0.3 dBV ±0.2 dBV ±0.2 dBV ±0.2 dBV ±0.2 dBV ±0.5 dBV
15 to below
35
Not specified
35 to below
55
Not specified
55 to 60 Not specified
±0.2 dBV ±0.2 dBV ±0.2 dBV ±0.2 dBV ±0.5 dBV
Not specified
Not specified
16 4-20 mA% conversion measurement
Range
4-20 mA
350.00%
0-20 mA
300.00%
Conversion formula
Measured value [mA] - 4 [mA]
16 [mA]
× 100
Measured value [mA]
20 [mA]
× 100
60.000 mA DC range fixed
Accuracy
±0.1%rdg. ±20 dgt.
±0.1%rdg. ±20 dgt.
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General Specifications
5.3 General Specifications
Product warranty period
Guaranteed accuracy period
Operating temperature
3 years
1 year
-15°C to 55°C (5F° to 131°F)
Operating humidity Up to 40°C (104°F): at 80%RH or less (non-condensating)
40°C to 45°C (104°F to 113°F): at 60%RH or less (non-condensating)
45°C to 55°C (113°F to 131°F): at 50%RH or less (non-condensating)
-30°C to 60°C (-22°F to 140°F), at 80%RH or less (non-condensating)
Storage temperature and humidity
Operating environment
Drop-proof distance
Indoors, pollution degree 2, altitude up to 2000 m
(6562 ft.)
1 m on concrete
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General Specifications
Power supply
Batteries
Rated power supply voltage
Maximum rated power supply voltage
Maximum rated power
Rated power
Power during OFF/
APS
AA size alkaline (LR6) battery or AA size manganese
(R6) battery x 4
1.5 V DC × 4
6.8 V
0.5 VA (max) supply voltage 6.0 V, Continuity measurement, Input short circuit, Backlight on
0.2 VA (typ) supply voltage 6.0 V, DCV measurement,
Input short circuit, Backlight off
0.1 mVA (max) supply voltage 6.0 V
Continuous operating time
(Representative value:
DCV function)
AA size battery
Alkaline off
Backlight on
Approx. 100 hours Approx. 30 hours
Manganese Approx. 30 hours Approx. 10 hours
(Using new battery)
Dielectric strength Between all measurement terminals and case: 8.54 kV AC
(sine wave, 50 Hz/60 Hz, 60 seconds)
Maximum rated voltage between terminals
Maximum rated current between terminals
Maximum rated voltage between measurement terminals and ground
Between the V and COM terminals: 1000 V DC/AC or 2 × 10 7 V • Hz (whichever is the lower value.)
Between the μA/mA and COM terminals: 600 mA
DC/600 mA AC
Between the A and COM terminals: 10 A DC/10 A AC
(continuous)
1000 V (Measurement category III)
600 V (Measurement category IV)
Anticipated transient overvoltage: 8000 V
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General Specifications
Dimensions
Mass
Applicable standards
Approx. 93W × 197H × 53D mm
(3.66″W × 7.76″H × 2.09″D) (excluding the projection)
Approx. 650 g (22.9 oz.) (including batteries)
•
• Safety: EN61010
EMC: EN61326
• Dustproof and waterproof: IP40 (EN60529)
IMPORTANT
To avoid any failure, do not allow the instrument to get wet. If the instrument gets wet, have your authorized Hioki distributor or reseller inspect or repair it, if necessary.
Accessories
•
• L9207-10 Test Lead
Instruction Manual
• LR6 alkaline battery × 4 (unloaded)
Replacement parts • µA/mA terminal fuse (DT4281, DT4282)
Manufacturer
Rating
Breaking characteristics
HOLLYLAND
630 mA/1000 V
Fast-blow type
Breaking capacity 50 kA AC/ 30 kA DC
Size
Resistance
Printed color
φ 10.3 mm × 38 mm
Approx. 1.2
Blue
Ω
Options
• A terminal fuse (DT4282 only)
Manufacturer
Rating
Breaking
HOLLYLAND
11 A/1000 V
Fast-blow type characteristics
Breaking capacity 50 kA AC/ 30 kA DC
Size
Resistance
Printed color
φ 10.3 mm × 38 mm
0.1
Red
Ω or less
See “Options (sold separately)” (p. 2).
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6 Maintenance and Service
6
Maintenance and Service
6.1 Repair, Inspection, and Cleaning
DANGER
Customers are not allowed to modify, disassemble, or repair the instrument.
Doing so may cause fire, electric shock, or injury.
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2
Calibrations
IMPORTANT
Periodic calibration is necessary in order to ensure that the instrument provides correct measurement results of the specified accuracy.
The calibration frequency varies depending on the status of the instrument or installation environment. We recommend that the calibration frequency is determined in accordance with the status of the instrument or installation environment and that you request that calibration be performed periodically.
Replacement parts and longevity
The longevity of the instrument varies depending on the usage environment and frequency.
Note that operation within the following period of time is not guaranteed. When replacing the part, contact your authorized Hioki distributor or reseller.
Backlight
Parts Longevity
Approx. 50,000 hours
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Repair, Inspection, and Cleaning
Cleaning
• To clean the instrument, wipe it gently with a soft cloth moistened with water or mild detergent.
• Wipe the display gently with a soft, dry cloth.
IMPORTANT
Never use solvents such as benzene, alcohol, acetone, ether, ketones, thinners or gasoline, as they can deform and discolor the case.
Disposal
Handle and dispose of the instrument in accordance with local regulations.
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Troubleshooting
6.2 Troubleshooting
• When a malfunction of the instrument is suspected, check the information in “Before sending the instrument for repair” and then, if necessary, contact your authorized Hioki distributor or reseller.
• When sending the instrument for repair, remove the batteries and pack it carefully to prevent damage during transportation.
Include cushioning material so the instrument cannot move within the package. Be sure to include details of the problem.
Hioki cannot be responsible for damage that occurs during transportation.
Before sending the instrument for repair
Symptom
Nothing appears in the display.
Or the display disappears after a short time.
A numerical value appears when nothing is connected.
Check and/or remedy
Check that the batteries are not exhausted.
Replace with new batteries. (p. 26)
Check that the auto power save function has not been activated.
Check the setting of the auto power save function.
(p. 70)
When the measurement terminal is open during
DC voltage (DCV) measurement or AC voltage
(ACV) measurement in the 60 mV range or 600 mV, a random value is displayed. This does not indicate a malfunction of the instrument. When the probe is connected to the measurement target, a normal numerical value is displayed. A high-input impedance voltmeter is used in the instrument for highly sensitive measurement. Consequently, external noise, such as inductive noise, appears as a numerical value.
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Troubleshooting
Symptom
(Current measurement)
The measured value does not appear.
(Except the current measurement)
The measured value does not appear.
Even after the connection or measurement, 0
(zero) still appears.
Even after short circuit of the probe, the measured value does not appear.
Zero adjustment is impossible.
•
• Check that the test leads have been inserted at the ends.
Check and/or remedy
Check that the fuse is not blown.
Replace with a new fuse specified by our company.
(p. 106)
Check that the fuse holder is not deformed.
When removing the fuse, the holder is deformed if excessive force is applied. Pinch it with needlenose pliers and restore the shape of the fuse holder.
Check that the test lead is not broken.
Perform the continuity check to confirm the continuity of the test leads. (p. 34)
If the test lead is broken, replace the lead.
Check that the measurement method is correct.
• Check that the fuse is not blown. (p. 35)
If no problems have been found, the circuit may be malfunctioning. Send the instrument for repair.
The fuse may be blown.
Check method: “3 Check that the fuse is not broken.” (p. 35)
If the fuse is blown, replace with the specified fuse.
(p. 106)
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Troubleshooting
Symptom
The display does not stabilize and the value fluctuates; it is difficult to read the value.
Check and/or remedy
The display does not stabilize due to the influence of noise and/or input signals.
Set the display update slower (press SLOW for
1 second) so that the display fluctuation can be eliminated. (p. 59)
[-----] appears in the display.
Less than 5% of each range is outside of the guaranteed accuracy at AC voltage (V AC, mV AC),
DC+ACV measurement, and AC (ACμA, ACmA,
ACA).
Less than 15% of each range is outside of the guaranteed accuracy at AC clamp measurement.
The measured value does not stabilize if the measurement signal is small.
[----] appears when the rotary switch position is not confirmed. Set the rotary switch to the proper position.
The display does not stabilize due to the influence of noise and/or input signals.
The measured value of the frequency does not stabilize.
The range cannot be changed.
Turning on the power brings up the error display.
When nothing is connected, the error display appears.
The measurement range cannot be changed when
[REL] is lit. To change the range, press REL for at least 1 second to reset the REL function.
Reset the instrument. (p. 76)
If the same symptom still occurs even after resetting the instrument, send the instrument for repair.
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Troubleshooting
Other inquiries
Question
Would like to perform zero adjustment.
Would like to replace the fuse.
Would like to know how to obtain the fuse.
Can rechargeable batteries be used?
Solution
Using the relative value display function, zero adjustment can be performed. (p. 64)
These are available at authorized Hioki distributors or resellers.
Would like to control multiple instruments with 1 PC.
The instrument cannot communicate with the PC.
Would like to know commands.
Would like to perform communication using own software.
Rechargeable batteries can be used. However, the discharge characteristic of these batteries is different from that of alkaline batteries. Be aware that the remaining battery power display does not function properly.
To communicate with the instrument, the optional
DT4900-01 Communication Package is required. It is possible to control multiple instruments via USB ports.
• Is the communication setting between the instrument and the PC correct?
• Are the baud rate and parity check set correctly?
(p. 72)
•
• Is the USB cable connected correctly? (p. 72)
Are the light receiving and emitting parts clean?
To communicate with the instrument, the optional
DT4900-01 Communication Package is required.
For details on commands, see the communication specifications in the CD accompanied by the communication package. These can also be downloaded from our Internet website.
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Error Display
6.3 Error Display
Error display
Err 001
Err 002
Err 004
Err 005
Description Solution
ROM error
Program
ROM error
Adjustment data
EEPROM error
Memory data
ADC error
Hardware malfunction
When the error appears in the display, it is necessary to solve by the actions below.
• Replace with new batteries.
(p. 26)
• Reset the instrument. (p. 76)
If the same symptom still occurs, it is necessary to repair the instrument.
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4
For other warning displays, refer to “1.4 Alarm Display and Battery
Indicator” (p. 23).
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Replacing Fuses
6.4 Replacing Fuses
If a fuse is blown, replace it with a new one as follows.
For details on how to check that the fuse is blown, see “3 Check that the fuse is not broken.” (p. 35).
WARNING
Replace the fuse only with one of the specified type, characteristics, rated current, and rated voltage.
Do not use fuses other than those specified (especially, do not use a fuse with higher-rated current) or do not short circuit and use the fuse holder. Doing so may damage the instrument and result in personal injury.
Specified fuses
For µA/mA terminal
(DT4281, DT4282)
Rating Resistance
630 mA/
1000 V
Approx.
1.2 Ω
For A terminal
(DT4282)
11 A/
1000 V
0.1 less
Ω or
Specifications
Manufacturer: HOLLYLAND
Breaking characteristic:
Fast-blow type
Breaking capacity:
50 kA AC/ 30 kA DC
Size: φ 10.3 mm × 38 mm
The fuses can be purchased via authorized Hioki distributors or resellers.
When removing the fuse, do not apply excessive force on the fuse holder. If the fuse holder is deformed, the connection becomes poor and the instrument cannot measure the current.
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Replacing Fuses
CAUTION
When replacing the fuse, do not allow foreign matter to enter the instrument. It may cause a malfunction.
1 Remove the test leads from the instrument.
2 Set the rotary switch to
OFF.
Screws
Rear
3 Using a Phillips screwdriver, remove the screws (2 locations) from the battery cover.
4 Remove the battery cover.
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2
3
4
5
µA/mA terminal fuse (Blue label)
5 Insert a slotted screwdriver or a similar tool (from the direction of the arrow in the left figure), and remove the fuse.
A terminal fuse
(Red label)
6 Attach a new fuse.
7 Reattach the battery cover.
8 Secure the cover with the screws.
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Appendix
Appendix
Appx. 1 RMS and Average
Difference between the RMS and Average
When converting AC to RMS, 2 methods are available, “True RMS method (True RMS indication)” and “Average method (Average rectifying RMS indication)”.
In the case of the sine wave where no skew is included, the same values are indicated in both methods. However, if the waveform is skewed, a difference occurs between the 2 methods.
The true RMS method is applied to this instrument.
In the true RMS method, the high frequency component is also included and displayed.
In the average method, the input waveform is handled as a sine wave where no skew is included (only single frequency). The average of the AC signal is obtained, converted to the RMS, and then displayed. If the waveform is skewed, a greater measurement error occurs.
Measurement example
100 V sine wave
100 V square wave
True RMS
100 V
100 V
Average rectifying
100 V
111 V
V(t) V(t)
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7
Vm Vavg Vrms t
Vm=Vavg=Vrms t
T
Sine wave
T
Square wave
Vm: Maximum value, Vavg: Average value, Vrms: RMS, T: Time period
正弦波
方形波
Appx.
1
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DC+AC の波形
DC 成分の波形
AC 成分の波形
DC+AC の波形
DC 成分の波形
114.1V
1
2
3
85.9V
100V
Operation Example
114.1V
85.9V
100V 100V
±14.1V
Appx. 2 Operation Example
Checking the noise of the DC voltage
Measure the AC component voltage, DC component voltage, and peak value.
4
5
6
DC+AC の波形
114.1V
85.9V
100V
Synthesized components of AC and DC
DC
8
Black
Red AC 成分の波形
9
DC+AC
Synthesized voltage of AC and DC
114.1V
85.9V
100V
DC component
100V
AC component
±14.1V
DC+AC
1
DC component voltage
2
DC 成分の波形
85.9V
100V
100V
114.1V
±14.1V
85.9V
100V
AC 成分の波形
DC+AC
DC/AC
Peak voltage
±14.1V
100V
AC 成分の波形
±14.1V
DC/AC
PEAK
PEAK
Appx.
2
3
100V
±14.1V
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5
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8
9
10
PEAK
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Capacitor Capacity Measurement Principle
Appx. 3 Capacitor Capacity
Measurement Principle
The instrument measures the capacity using the CR self-excited oscillation method (triangle wave).
R: Instrument internal circuit Varies with each range.
C: Object to be measured Capacitor
When the capacitor to be measured is connected, self-excited oscillation begins. The capacity is calculated based on the measured frequency during self-excited oscillation. The frequencies during self-excited oscillation are shown in the table below.
Measurement range
1 nF
10 nF
100 nF
1 µF
10 µF
100 µF
1 mF
10 mF
100 mF
Resistance of the instrument internal circuit
100 k Ω
100 k Ω
100 k Ω
100 k Ω
5 k Ω
5 k Ω
5 k Ω
5 k Ω
5 k Ω
Reference oscillation frequency
500 Hz to 600 Hz
300 Hz to 600 Hz
60 Hz to 600 Hz
6 Hz to 600 Hz
15 Hz to 5100 Hz
1.5 Hz to 5100 Hz
5 Hz to 9300 Hz
0.5 Hz to 9300 Hz
0.05 Hz to 9300 Hz
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7
Even when the same capacitor is measured, the capacity may vary depending on the measurement range. This is because the oscillation frequency is different even in the same capacitor since the resistance R of the instrument internal circuit changes for each measurement range.
Consequently, the capacity differs as shown in the table below depending on the measurement range when a measurement target that is frequencydependent, such as an electrolytic capacitor, is measured. The table shows the capacity for each frequency and contains true values.
Appx.
3
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Dedicated Software (DMM Communicator)
(Example) Measurement of 100 µF electrolytic capacitor
Measurement range Oscillation frequency Instrument displayed value
100 µF
1 mF
1.369 Hz
50.797 Hz
101.9 µF
0.090 mF
Appx. 4 Dedicated Software
(DMM Communicator)
The PC application (DMM Communicator) can be used to send measurement data from the instrument to a computer or to configure instrument settings from a computer.
The DT4900-01 Communication Package (USB) dedicated communications adapter is required in order to connect the instrument to a computer.
Specifications
• Display, record, and graph measurement data from the instrument
• Configure instrument settings such as the range
• Display a connection screen based on the instrument’s measurement function
• Save recorded measurement data as a CSV-format text file
• Paste measurement data into Excel ®
• Load DMM instrument memory data
Microsoft Excel is a registered trademark of Microsoft Corporation in the
United States and other countries.
Appx.
4
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16-01 EN
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