Hioki DT4252 Instruction Manual
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Hioki DT4252 Instruction Manual

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DT4252
DT4253
DT4254
  Instruction Manual
DT4255
DT4256
DIGITAL MULTIMETER
EN
May 2015 Revised edition 2  
DT4251A981-02 15-05H
GlobalTestSupply
www.
.com
Find Quality Products Online at:
sales@GlobalTestSupply.com

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  • Page 1 DT4252 DT4253 DT4254   Instruction Manual DT4255 DT4256 DIGITAL MULTIMETER May 2015 Revised edition 2   DT4251A981-02 15-05H GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...

  • Page 2: Table Of Contents

    Contents Introduction .................1 Verifying Package Contents ..........1 Options (sold separately) ..........2 Safety Notes ................5 Usage Notes ..............10 Overview Overview and Features .........15 Parts Names and Functions ......16 Display ............22 Alarm Display and Battery Indicator ...23 Preparation for Measurements Measurement Workfl ow ........25 Inserting/Replacing Batteries ......26 Using Test Leads ...........29 Installation in Measurement Location ..32...
  • Page 3 Checking Continuity (DT4252 DT4253 DT4255 DT4256) .....47 Measuring Diode (DT4252 DT4253 DT4255 DT4256) .....48 Measuring Resistance (DT4252 DT4253 DT4255 DT4256) .....49 Measuring Temperatures (DT4253)....50 Measuring Electrostatic Capacities (DT4252 DT4253 DT4255 DT4256) .....52 Measuring Current (DT4252 DT4253 DT4256) ......53 Measuring DC/AC Current ........53 3.10 Measuring AC Current Using Clamp-on...
  • Page 4 Turning On the Backlight ......70 Using the Auto Power Save (APS) ....70 Using Plus/Minus Judgment Function for Measurement Value (DT4254 DT4255 DT4256) ......71 Communicating with PC .......72 4.10 Power-on Option Table .........74 Changing the temperature display unit ..... 77 Specifi cations General Specifi...

  • Page 5: Introduction

    Introduction Introduction Thank you for purchasing the HIOKI DT4252, DT4253, DT4254, DT4255, DT4256 Digital Multimeter. To obtain maximum performance from the product, please read this manual fi rst, and keep it handy for future reference. Verifying Package Contents When you receive the instrument, inspect it carefully to ensure that no damage occurred during shipping.

  • Page 6: Options (Sold Separately)

    Options (sold separately) Options (sold separately) The following options are available for the instrument. Contact your authorized Hioki distributor or reseller when ordering. Connecting cables *1: CATIV 600 V/CATIII 1000 V/CATII 1000 V *2: CATIV 600 V/CATIII 1000 V *3: CATIII 1000 V...
  • Page 7 Options (sold separately) For the clamp current measurement (Compatible only with the DT4253, DT4255, and DT4256) 9010-50, 9018-50, 9132-50 Clamp-on Probe 9704 Conversion Adapter Clamp-on probe Rated current Diameter of the measurable conductor 46 mm or less 9010-50, 9018-50 500 Arms 55 mm or less, 80×20 mm bus-bar 9132-50 1000 Arms...
  • Page 8 Options (sold separately) Z5004 Magnetic Strap (p. 32) Attach this strap to the instrument and secure it on the wall surface such as a metal plate for use. DT4900-01 Communication Package (USB) (p. 72) A communication adapter, USB cable, PC software, and communication specifi...

  • Page 9: Safety Notes

    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.
  • Page 10 Safety Notes Notation In this manual, the risk seriousness and the hazard levels are classifi ed as follows. Indicates an imminently hazardous situation that will DANGER result in death or serious injury to the operator. Indicates a potentially hazardous situation that may WARNING result in death or serious injury to the operator.
  • Page 11 Safety Notes Symbols affi xed to the instrument Indicates cautions and hazards. When the symbol is printed on the instrument, refer to a corresponding topic in the Instruction Manual. Indicates that dangerous voltage may be present at this terminal. Indicates a double-insulated device. Indicates a fuse.
  • Page 12 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 1 2 3 4 5 6 7 8 9 0 A different display is used in the case below.
  • Page 13 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.

  • Page 14: Usage Notes

    • Before using the instrument for the fi rst time, verify that it operates normally to ensure that no damage occurred during storage or shipping. If you fi nd 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.
  • Page 15 Usage Notes Handling the cables WARNING To prevent electric shock, when measuring the voltage of a power line use a test lead that satisfi es the following criteria: • Conforms to safety standards IEC61010 or EN61010 • Of measurement category III or IV •...
  • Page 16 Do not supply current in excess of the specifi ed limit. (Only the DT4252 and DT4256) Observe the following to avoid electric shock and/or short circuits.
  • Page 17 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.

  • Page 18: Overview

    Overview 1.1 Overview and Features This measuring instrument is a multi-function digital multimeter that ensures both safety and durability. Main features and functions • Solid body which can be used for an • Speedy display of the RMS extended period of time (drop-proof) measured value •...

  • Page 19: Parts Names And Functions

    1.2 Parts Names and Functions Front Some indications are different among the models. Display (p. 22) Operation keys (p. 17) Rotary switch (p. 18) Measurement terminals (p. 20) DT4252 DT4253 DT4255 DT4254 DT4256 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
  • Page 20 Parts Names and Functions Operation keys Pressed down for Power-on Normal at least 1 second option (p. 74) Manually sets/ Sets/cancels the auto Cancels the cancels the hold hold function for the auto power save function for the displayed value. function (APS).
  • Page 21 Parts Names and Functions Rotary switches and measurement descriptions Function AC voltage and √ √ √ √ √ frequency measurement √* √ √* √ √ DC voltage measurement DC voltage measurement √ (High accuracy 600.0 mV range) DC/AC voltage measurement √...
  • Page 22 Parts Names and Functions Function √* √ DC current (A) measurement AC current (A) and √* √ frequency measurement *1: No 600.0 mV range *2: No 60.00 mA and 600.0 mA range *3: No 600.0 mA range Ω *4: Input impedance 1800 k ±20% *5: Maximum allowable measurement range: 1700 V GlobalTestSupply...
  • Page 23 Parts Names and Functions Measurement terminals DT4252 DT4254 DT4253 DT4255 DT4256 Current measurement terminal. Hereafter referred to as “A terminal (μA terminal, mA terminal)”. The red test lead is connected. Commonly used for each measurement. Hereafter referred to as “COM terminal”.
  • Page 24 Parts Names and Functions Rear 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 Magnetic Strap can be attached.

  • Page 25: Display

    Display 1.3 Display For error displays, see “6.3 Error Display” (p. 99). Sub display Main display Communicating with • Relative value display (during temperature the PC. (p. 72) measurement) Retention of the • Temperature measured value. difference from the standard.(p. 68) (p.

  • Page 26: Alarm Display And Battery Indicator

    Alarm Display and Battery Indicator 1.4 Alarm Display and Battery Indicator When the measured value exceeds the maximum input range in each range Voltage/Current measurement The measured value and OVER blink and the red LED lights up. Measurement other than voltage and current The measured value and OVER blink.
  • Page 27 Alarm Display and Battery Indicator Power shutdown When the charge is 0% (less than 4.0 V ± 0.1 V), “bAtt” appears in the display for 3 seconds and the power is shut down. GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...

  • Page 28: Preparation For Measurements

    Preparation for Measurements 2.1 Measurement Workfl ow Before using the instrument, be sure to read “Usage Notes” (p. 10). Installation and connection As necessary, have other optional Insert the batteries. (p. 26) items available and ready. Perform the startup check. (p. 37) Measurement To ensure safe operation, To ensure safe operation,...

  • Page 29: Inserting/Replacing Batteries

    If you have lost a screw or fi nd that a screw is damaged, please contact your Hioki distributor for a replacement. GlobalTestSupply www.
  • Page 30 Inserting/Replacing Batteries 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. •...
  • Page 31 Reattach the battery cover. Secure the cover with the screw. (Only the DT4252, DT4253, DT4255, and DT4256) After the battery cover is removed, the fuse can be seen. When replacing the fuse, see “6.4 Replacing Fuses”...

  • Page 32: Using Test Leads

    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 •...
  • Page 33 Using Test Leads L9207-10 Test Lead Sleeves Barriers Black Plugs Metal pins Cables The plugs of the test leads are covered with the safety caps. Before use, remove the caps. Safety cap Metal pin Connect to the object to be measured. 4 mm or less (sleeve attached) 19 mm or less (sleeve removed) Diameter ...
  • Page 34 Connect the black test lead. V terminal Connect the red test lead. • Current measurement COM terminal Connect the black test lead. μA/mA terminal Connect the red test lead. (DT4253) A terminal (DT4252, DT4256) GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...

  • Page 35: Installation In Measurement Location

    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.
  • Page 36 Installation in Measurement Location DANGER Those with medical electronics such as pacemakers should not use the Z5004 Magnetic Strap. Nor should such persons approach the Z5004. It is extremely dangerous. The electronics may not operate properly and the life of the operator may be put at great risk. CAUTION •...

  • Page 37: Using The Carrying Case

    Using the Carrying Case 2.5 Using the Carrying Case C0201 Carrying Case The test leads can be stored. The instrument can be stored. The instruction manual can be stored at the bottom of the case. GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
  • Page 38 Using the Carrying Case Removing the cover Unfasten the button on the side of the cover marked with OPEN. Flip the cover to the back. Fasten the button. GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
  • Page 39 Using the Carrying Case Using the instrument with a strap around the neck 1 1 1 Unfasten the button. Secure the button at the position shown in the fi gure. GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...

  • Page 40: Performing Measurements

    Before using the instrument the fi rst time, verify that it operates normally to ensure that no damage occurred during storage or shipping. If you fi nd any damage, contact your authorized Hioki distributor or reseller. Appearance check of the instrument and test leads...
  • Page 41 Inspection Before Use Check item Action No indicators are missing. Display all indicators and ensure that no indicators are missing. (p. 75) 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 specifi...
  • Page 42 Inspection Before Use 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 Action Example: Normal: Perform the AC voltage An already-known value appears. measurement to measure the (In this example, the commercial commercial power supply, and then...
  • Page 43 Inspection Before Use Check that the fuse is not broken. DT4252, DT4256 check method Action 1. Set the rotary switch to Normal: resistance measurement. Fuse rating Resistance 2. Connect the tip of the red test lead to the A terminal and check Ω...
  • Page 44 Inspection Before Use DT4255 check method Action If normal at “ Check that the test Normal: leads are not broken.” (p.  3 8), the Fuse rating Resistance check below is unnecessary. Ω 630 mA 1 to 5 Abnormal: Abnormal: 1. Remove the fuse from the instrument.
  • Page 45 Inspection Before Use To check the electric charge properly, do not use the instrument with test leads wrapped around the instrument. The sensitivity of electric charge detection deteriorates. 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.

  • Page 46: Measuring Voltage

    Measuring Voltage 3.2 Measuring Voltage AC/DC voltage measurement and measurement using the AC and DC automatic judgment (only the DT4253, DT4254, DT4255, and DT4256) can be performed. Furthermore, the maximum, minimum, and average values of the measured values can be checked. (p.  6 6) Before measurements WARNING If the instrument is used in locations where the rating...

  • Page 47: Measuring Dc Voltage

    Measuring DC voltage Measure the DC voltage. “4.8 Using Plus/Minus Judgment Function for Measurement Value (DT4254, DT4255, DT4256)” (p.  7 1) is only used for the DT4252. Black (The position of the rotary switch varies depending on the model.) GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...

  • Page 48: Measurement Using The Ac And Dc Automatic Judgment (Dt4253, Dt4254, Dt4255, Dt4256)

    Measuring Voltage Measurement using the AC and DC automatic judgment (DT4253, DT4254, DT4255, DT4256) The AC and DC are automatically judged and the voltage is measured. (The instrument does not measure both AC and DC at the same time.) “4.8 Using Plus/Minus Judgment Function for Measurement Value (DT4254, DT4255, DT4256)”...

  • Page 49: Measuring Frequencies

    Measuring Frequencies 3.3 Measuring Frequencies During voltage/current measurement of AC, the frequency can be checked in the sub display. The frequency display is auto-ranging. The AC voltage and current ranges can be changed by pressing the RANGE key. Frequency • If signals out of the range of frequency measurement are measured, “-----” appears.

  • Page 50: Checking Continuity (Dt4252, Dt4253, Dt4255, Dt4256)

    Checking Continuity (DT4252, DT4253, DT4255, DT4256) 3.4 Checking Continuity (DT4252, DT4253, DT4255, DT4256) The input short circuit is detected and informed via a buzzer and red LED. 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.

  • Page 51: Measuring Diode (Dt4252, Dt4253, Dt4255, Dt4256)

    Measuring Diode (DT4252, DT4253, DT4255, DT4256) 3.5 Measuring Diode (DT4252, DT4253, DT4255, DT4256) The forward voltage of the diode is measured. If the forward voltage is within the range from 0.15 V to 1.5 V, it is indicated via a buzzer (intermittent buzzer sound) and red LED.

  • Page 52: Measuring Resistance (Dt4252, Dt4253, Dt4255, Dt4256)

    Measuring Resistance (DT4252, DT4253, DT4255, DT4256) 3.6 Measuring Resistance (DT4252, DT4253, DT4255, DT4256) Resistance is measured. To measure the low resistance accurately, it is necessary to cancel the resistance of the test leads. Perform zero adjustment for the displayed value using the relative value display (relative function p. ...

  • Page 53: Measuring Temperatures (Dt4253)

    Measuring Temperatures (DT4253) 3.7 Measuring Temperatures (DT4253) 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. When a breaking state of the Thermocouples (K) is detected Checking the temperature change...
  • Page 54 Measuring Temperatures (DT4253) 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.

  • Page 55: Measuring Electrostatic Capacities (Dt4252, Dt4253, Dt4255, Dt4256)

    Measuring Electrostatic Capacities (DT4252, DT4253, DT4255, DT4256) 3.8 Measuring Electrostatic Capacities (DT4252, DT4253, DT4255, DT4256) 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.

  • Page 56: Measuring Current (Dt4252, Dt4253, Dt4256)

    The % conversion of 4-20 mA can be checked in the sub display. • Selected to measure 10 A DC/AC or less. (DT4252, DT4256) The % conversion of 4-20 mA can be checked in the sub display. (Only the DT4256) When measuring an unknown current Set to the high range (mA for the DT4253).
  • Page 57 Measuring Current(DT4252, DT4253, DT4256) DT4253 Control board Black Example: Measuring the current of the burner fl ame (μA) The measured current value of the burner fl ame varies with the input impedance of the instrument. Ω The μA input impedance of this instrument is approx. 1 k...
  • Page 58 Measuring Current(DT4252, DT4253, DT4256) 4 - 20 mA % conversion (DT4253, DT4256) The 4 - 20 mA signal of the instrumentation system can be converted to 0% to 100% and checked. 4 mA - 20 mA → 0% - 100% (An input less than 4 mA or exceeding 20 mA is displayed with [----].)

  • Page 59: Measuring Ac Current Using Clamp- On Probe (Dt4253, Dt4255, Dt4256)

    Measuring AC Current Using Clamp-on Probe (DT4253, DT4255, DT4256) 3.10 Measuring AC Current Using Clamp- on Probe (DT4253, DT4255, DT4256) 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.
  • Page 60 Measuring AC Current Using Clamp-on Probe (DT4253, DT4255, DT4256) 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. When the measured value and OVER blink The measured value exceeds the maximum display counts.

  • Page 61: Checking The Electric Charge (Dt4254, Dt4255, Dt4256)

    Checking the Electric Charge (DT4254, DT4255, DT4256) 3.11 Checking the Electric Charge (DT4254, DT4255, DT4256) Whether a power line is energized can be checked easily. If the power line is energized, it is indicated via a buzzer and display. Use this function for coated power lines.

  • Page 62: Using Instrument Conveniently

    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 at the bottom of the display. • Auto range Sets the optimum range automatically in accordance with the actual measurement.

  • Page 63: Retaining The Measured Value

    Retaining the Measured Value 4.2 Retaining the Measured Value The measured value is retained manually or automatically. (The bar graph is updated.) • Manually When HOLD is pressed, the measured value is retained. (HOLD lights up.) • Automatically When HOLD is pressed and held for at least 1 second, auto hold mode starts (HOLD blinks), and when the measured value stabilizes, it is retained.

  • Page 64: Automatically Retaining The Measured Value When The Value Stabilizes (Auto Hold)

    Retaining the Measured Value Automatically retaining the measured value when the value stabilizes (AUTO HOLD) Press for at least 1 second. Press for at least 1 sec. (HOLD blinks, the instrument is Blinks (Waiting for measured for measured waiting for the measured value to value to stabilize) stabilize) ) stabilize.)
  • Page 65 Retaining the Measured Value Conceptual diagram (AC voltage) 100.0 V 99.0 V Displayed value Auto hold Not retained automatically. (Example) 100.0 V (The threshold is not exceeded.) Auto hold (Example) 99.0 V Threshold for Stable range auto holding. Measured value Dead zone Connect to the Release...
  • Page 66 Retaining the Measured Value Conditions for auto holding Stable range for auto Threshold for auto holding holding Function (Display count) (Dead zone display count) AC voltage 120 or less (except 1000 V 120 or less (except 1000 V range) range) 20 or less (1000 V range) 20 or less (1000 V range) DC voltage*...

  • Page 67: Reducing The Effect Of The Noise (Filter)

    Reducing the Effect of the Noise (FILTER) 4.3 Reducing the Effect of the Noise (FILTER) WARNING To avoid electric shock or other personal injury, select the appropriate passband setting when measuring the AC voltage. If an inappropriate frequency is selected, the measured value displayed will not be correct.
  • Page 68 Reducing the Effect of the Noise (FILTER) Example of frequency property when a fi lter is used Measured (AC voltage 600.0 V range, 100 V input) value [V] Filter OFF Passband 500 [Hz] Passband 100 [Hz] 1000 10000 Frequency at 100 V input [Hz] Example: Power frequency on an aircraft or marine vessel is 400 Hz When voltage is 100 V FILTER setting...

  • Page 69: Checking The Maximum/Minimum/Average

    Checking the Maximum/Minimum/Average 4.4 Checking the Maximum/Minimum/ Average The maximum value (MAX), minimum value (MIN), and average value (AVG) of the measured value can be checked. When the following measurement function is selected, this function is disabled. AUTO V, Electric charge detection Connect the test leads to the measurement object and press Each time the key is pressed, the main display...

  • Page 70: Checking The Relative Value/Performing Zero Adjustment

    Checking the Relative Value/Performing Zero Adjustment 4.5 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 infl uences of the test lead wiring resistance (continuity, resistance measurement) and the wiring capacity (capacitor measurement).
  • Page 71 Checking the Relative Value/Performing Zero Adjustment Example 2: Temperature measurement When the standard value is measured, press for at least 1 second. The standard temperature is fi xed as T1. (△T and T1 light up.) The currently measured temperature is displayed as T2 alternately with T1.
  • Page 72 Checking the Relative Value/Performing Zero Adjustment Performing zero adjustment When performing zero adjustment, the condition of the test leads varies depending on the measurement function. Perform zero adjustment, referring to the table below. Ω Measurement function V, A, Condition of the test leads Short circuit Open Example 1: Resistance measurement...

  • Page 73: Turning On The Backlight

    Turning On the Backlight 4.6 Turning On the Backlight The backlight can be turned on/off by pressing The backlight automatically turns off if the instrument is not operated for approx. 40 seconds. The automatic backlight deactivation function can be disabled. (p.

  • Page 74: Using Plus/Minus Judgment Function For Measurement Value (Dt4254, Dt4255, Dt4256)

    Using Plus/Minus Judgment Function for Measurement Value (DT4254, DT4255, DT4256) 4.8 Using Plus/Minus Judgment Function for Measurement Value (DT4254, DT4255, DT4256) If the measured DC voltage is less than the following standard value, a buzzer sounds and the red LED lights up. This function is useful for checking for any incorrect connection of the DC power.

  • Page 75: Communicating With Pc

    Communicating with PC 4.9 Communicating with PC Using the optional DT4900-01 Communication Package, it is possible to transmit data to the PC or to control the instrument. Install the special software on the PC. (See the Instruction Manual which accompanies with the communication package.) Attaching the USB cable to the instrument (p.
  • Page 76 Communicating with PC Attaching the communication adapter to the instrument Attach the USB cable communication adapter. Connect the USB cable to the communication Communication adapter. adapter Communication port • Connect the cables, being careful to orient each cable correctly. • During communication, appears in the display.

  • Page 77: Power-On Option Table

    Power-on Option Table 4.10 Power-on Option Table The settings in the instrument can be changed or checked. When the power is turned off, all setting changes, except the temperature display unit and plus/minus judgment function are lost. When the operation key is released after changing the setting, the regular display then reappears.
  • Page 78 Power-on Option Table Setting change Method Enabling/ The setting will be saved even when the power is turned disabling the off. ON and OFF is switched at each operation. Plus/Minus judgment function (First position from OFF) Example: Ver 1.00 Checking the software version (Third position from OFF)
  • Page 79 Power-on Option Table Setting change Method (Second position from OFF) FACT: Indicates that the settings have been adjusted by Hioki. USER: Indicates that the settings have been adjusted by Checking the the user. adjustment source GlobalTestSupply www. .com Find Quality Products Online at:...

  • Page 80: Changing The Temperature Display Unit

    Power-on Option Table Changing the temperature display unit The units of temperature (°C or °F) can be changed. Turn on the power while pressing simultaneously. Press and hold simultaneously. Press to change the (Display: tEMP) temperature unit. Press and hold to save the setting.

  • Page 81: Specifi Cations

    -25°C to 65°C (-13.0°F to 149.0°F): DT4254, DT4255, and humidity DT4256 -10°C to 50°C (14.0°F to 122.0°F): DT4252, DT4253 • Humidity: -25°C to 40°C (-13.0°F to 104.0°F): 80% RH or less (no condensation) 40°C to 65°C (104.0°F to 149.0°F) : reduces linearly to 40°C (104.0°F) 80% RH or less to...
  • Page 82 630 mA/1000 V fuse for voltage terminal (Breaking capacity 50 kA AC/30 kA DC Fast-blow type: 10.3 × 38 mm, HOLLYLAND) • DT4252, DT4256 11 A/1000 V fuse for current terminal (A) (Breaking capacity 50 kA AC/30 kA DC Fast-blow type: 10.3 × 38 mm, HOLLYLAND) Standards •...

  • Page 83: Electrical Characteristics

    ) /1000 V AC or voltage between 2×10 V • Hz terminals *1: DT4252, *2: DT4253, *3: DT4254, *4: DT4255, *5: DT4256 *6: Until the values stabilize within the accuracy specifi cation range. *7: Measured within the measurement range (excluding range movement). GlobalTestSupply www.
  • Page 84 Electrical Characteristics Maximum rated • DT4252, DT4256: Current terminal (A): 10 A DC/10 A AC current between • DT4253: Current terminal (μA, mA): 60 mA DC terminals Maximum rated 1000 V AC (Measurement category III) voltage between 600 V AC (Measurement category IV)

  • Page 85: Accuracy Table

    (no condensation) Temperature characteristic • “Measurement accuracy × 0.1/°C” is added (excluding 23°C ± 5°C (73.0°F ± 9.0°F)). • For resistance of DT4252 and DT4253 Ω 60.00 M range, “Measurement accuracy × 0.4/°C” is added (excluding 23°C ± 5°C (73.0°F ± 9.0°F)).
  • Page 86 Accuracy Table • Overload protection: 1100 V DC (1870 V DC )/1100 V AC or 2×10 V • Hz (energized for 1 minute) Transient overvoltage: 8000 V • Crest factor: The crest factor is 3 up to 4000 counts and reduces linearly to 2 at 6000 counts.
  • Page 87 Accuracy Table Minimum sensitivity voltage (sine wave) AC voltage range Range Measurement range 6.000 V 60.00 V 600.0 V 1000 V 99.99 5.00 Hz to 99.99 Hz 0.600 V 6.00 V 60.0 V or 100 V or or more or more more more 999.9...
  • Page 88 (energized for 1 minute) • Auto range movement threshold: 6000 counts or more for upper range, 540 counts or less for lower range. *1: DT4255, DT4256 *2: DT4254 *3: DT4252, DT4253 DC voltage (High accuracy 600.0 mV) Range Accuracy Input impedance Ω...
  • Page 89 Accuracy Table AUTO V Accuracy Range Input impedance DC, 40 to 500 Hz Over 500 Hz to 1 kHz Ω 600.0 V ±2.0% rdg. ±3 dgt. ±4.0% rdg. ±3 dgt. 900 k ±20% Ω 1800 k ±20% • Overload protection: 1100 V DC (1870 V DC )/1100 V AC or 2×10 V •...
  • Page 90 • Maximum inductive load: 10 H • Accuracy guarantee condition: After zero adjustment has been performed • Auto range movement threshold: 6000 counts or more for upper range, 540 counts or less for lower range. *1: DT4252, DT4253 *2: DT4255, DT4256 GlobalTestSupply www.
  • Page 91 • During the forward connection, an intermittent buzzer sounds (threshold: 0.15 V to 1.5 V) and the red LED blinks • A continuous buzzer sounds and the red LED lights up at 0.15 V or less. *1: DT4252, DT4253, DT4256 *2: DT4255 GlobalTestSupply www.
  • Page 92 Accuracy Table Temperature Thermocouple type Range Accuracy -40.0°C to 400.0°C ±0.5% rdg. ±2°C -40.0°F to 752.0°F ±0.5% rdg. ±3.6°F • Overload protection: 1000 V DC/1000 V AC or 2×10 V • Hz (energized for 1 minute) Current under overload: Steady state 15 mA or less, transient state 0.8 A or less •...
  • Page 93 Accuracy Table • Connection method: DC coupling *1: The accuracy is specifi ed in 1% or more of the range, however, ±5 dgt. should be added to 5% or less of the range. • Accuracy guarantee range for frequency: 40 Hz to 1 kHz (Measured values outside the accuracy guarantee range for frequency are also displayed.) The accuracy is not specifi...
  • Page 94 • Overload protection: 11 A/1000 V fuse, breaking capacity 50 kA AC/30 kA DC • Auto range movement threshold: 6000 counts or more for upper range, 540 counts or less for lower range. *1: DT4252 *2: DT4256 AC Current (A)
  • Page 95 Accuracy Table • For 100 Hz with the fi lter ON, ±1.5% rdg. is added to the accuracy specifi cation between 40 Hz and 100 Hz and the accuracy is not specifi ed in 100 Hz or more. • For 500 Hz with the fi lter ON, ±0.5% rdg. is added to the accuracy specifi...

  • Page 96: Maintenance And Service

    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 fi re, electric shock, or injury. Calibrations IMPORTANT Periodic calibration is necessary in order to ensure that the instrument provides correct measurement results of the specifi...

  • Page 97: 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.
  • Page 98 Troubleshooting Symptom Check and/or remedy The measurement If the measured current value does not appear, value does not check that the fuse is not blown. appear. Check method: “Check that the fuse is not broken.” Even after the (p. 40) measurement, 0 If the fuse is blown, replace it with the specifi...
  • Page 99 Using the relative value display function, zero zero adjustment. adjustment can be performed. (p. 69) Would like to replace The fuse can be purchased via authorized Hioki the fuse. distributor or reseller. Would like to know how to obtain the fuse.

  • Page 100: Error Display

    When the error appears in the ROM error Err 002 display, it is necessary to repair Adjustment data the instrument. EEPROM error Contact your authorized Hioki Err 004 Memory data distributor or reseller. ADC error Err 005 Hardware malfunction GlobalTestSupply www.

  • Page 101: Replacing Fuses

    For A terminal 11 A/ (DT4252, DT4256) 1000 V The fuses can be purchased via authorized Hioki distributor or reseller. 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.
  • Page 102 Replacing Fuses CAUTION When replacing the fuse, do not allow foreign matter to enter the instrument. It may cause a malfunction. Do not remove the fuse using the tip of test lead L9207-10 supplied with the instrument. The tip of the test lead may bend. Remove the test leads from the instrument.

  • Page 103: Appx. 1 Rms And Average

    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.
  • Page 104 13-09 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
  • Page 105 I he content of this manual is protected by copyright. No reproduction, duplication or modiflcation of the content is permitted wilhoul tt,a autt1orization of Hioki E.E. Corporal ion. HIOKI I IIOKI E. E. CORPOR.£>.rl□N 1502EN Edited and published by I lioki E.E.

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