HIOKI Digital Multimeter DT4200 Series

Defy conventional wisdom for achieving testing safety with a new and proprietary circuit breaker false trip prevention function.

Safety First: Preventing Accidents in Field Measurements

Mistakenly tripped circuit breakers and arcs due to careless input of voltage to the resistance range can be extremely hazardous.

Erroneous Circuit-Breaker Activation

The DT4223 and DT4224 feature a new proprietary function that prevents accidents resulting from breakers that mistakenly trip due to incorrect input.

Conventional Digital Multimeters vs. DT4223/DT4224

Conventional multimeters can cause hazards like tripped circuit breakers and arcing when voltage is mistakenly applied to the resistance range due to their measurement circuit design. The DT4223 and DT4224, however, switch measurement circuits only after detecting the appropriate signal. If voltage is mistakenly input, their high input impedance limits current to 1.5 mA or less, preventing hazards.

Key Safety Features Across the DT4200 Series

Hazard 1: Debris Prevention: Voltage input terminals on models like the DT4255 incorporate a protective fuse to prevent internal short-circuits from contamination.
Hazard 2: High Input Warning: A warning function immediately notifies the operator if the DMM receives excessively high input, preventing major accidents like fires. (Red screen available on high-end models and DT4223/DT4224).
Hazard 3: Mis-insertion Prevention: Models like the DT4281 and DT4282 use terminal shutters to block unused inlets, preventing probes from being inserted into the wrong ports.
Hazard 4: Mistaken Voltage/Current Measurement: Models like the DT4281, DT4253, DT4255, and DT4256 use clamp-on sensor-based current measurement to eliminate the risk associated with incorrect probe insertion for current measurements.

Measurement Categories and Safety Standards

Safe measurement requires an instrument suited to the location. IEC 61010 classifies locations into safety-based measurement categories (CAT II to CAT IV). Using an instrument that doesn't meet the required safety level can lead to accidents.

Measurement Category Suitability

Model Type	Measurement Category
High-end models	CAT III 1000 V / CAT IV 600 V
Standard models	CAT III 1000 V / CAT IV 600 V
Pocket models	CAT III 600 V / CAT IV 300 V

Field-Proven Strength and Usability

The DT4200 series is designed for durability, ease of use, and enhanced work efficiency in demanding field environments.

Robust Design

Drop-Proof: Capable of withstanding a drop from a height of 1 meter onto concrete.
Dust-Proof: Incorporates an O-ring around the rotary switch to prevent dust ingress and device failure.

Enhanced Usability

Inverter Voltage Measurement: Accurately measures output voltage on the secondary side of inverters, isolating fundamental waves with a low-pass filter.
Clear Display: Features a wide viewing angle and backlight for easy readability in dim locations or at angles.
Glove-Friendly Operation: Rotary switch is designed for easy operation even with thick work gloves.
Hands-Free Operation: Magnetic strap and auto-hold function allow for secure instrument placement and automatic value stabilization, freeing up hands for other tasks.
Probe Selection: Extensive selection of probe tips to suit various measurement locations and needs.

Advanced Functions

Auto-Hold: Automatically freezes the display when the measured value stabilizes.
Memory Function: Pressing the MEM key saves measured values to internal memory.
Computer Connectivity: Data can be managed on a computer via USB using the optional Communication Package DT4900-01.
True RMS Measurement: Ensures accurate readings for distorted current waveforms.
Intuitive Notifications: Red screen backlight and beep alert users to continuity check results and excessively high input.

Model Overview

High-End Models

Featuring high accuracy, extensive additional functionality, and a broad range of measurement parameters.

DT4281: For electrical work, designed for maximum safety when measuring current with clamp-on sensors.
DT4282: For laboratory and research use, designed for measuring a wide variety of parameters.

Standard Models

Field-optimized instruments chosen based on application.

DT4252: For laboratory and research use.
DT4253: For instrumentation, air-conditioning equipment, and gas-burning devices.
DT4254: Voltage measurement only, for high-voltage targets like megasolar installations (up to 1700 V DC).
DT4255: For electrical work, with voltage measurement terminals protected by a fuse.
DT4256: Multifunction model delivering broad functionality.

Pocket Models

Compact body for ergonomic hold and a reliable, safe design.

DT4221: For electrical work, prioritizing field safety for voltage measurement.
DT4222: For multiple applications, suitable for laboratories and R&D.
DT4223: For electrical work, prioritizing field safety for voltage measurement, includes circuit breaker false trip prevention.
DT4224: For multiple applications, suitable for laboratories and R&D, includes circuit breaker false trip prevention.

Key Specifications Comparison

The following tables provide a detailed comparison of the DT4200 series models.

Basic Characteristics Comparison

Characteristic	DT4281/DT4282	DT4252/DT4253/DT4255/DT4256	DT4221/DT4222	DT4223/DT4224
True RMS	Yes	Yes	Yes	Yes
DCV basic accuracy	±0.025% rdg. ±2 dgt.	±0.3% rdg. ±5 dgt.	±0.5% rdg. ±5 dgt.	±0.5% rdg. ±5 dgt.
Measurement Categories	CAT III 1000 V / CAT IV 600 V	CAT III 1000 V / CAT IV 600 V	CAT III 600 V / CAT IV 300 V	CAT III 600 V / CAT IV 300 V

Measurement Items (Typical Ranges)

Item	DT4281	DT4282	DT4252	DT4253	DT4254	DT4255	DT4256	DT4221	DT4222	DT4223	DT4224
DC Voltage	60 mV to 1000 V	60 mV to 1000 V	600 mV to 1000 V	600 mV to 1000 V	600 mV to 1500 V	600 mV to 1000 V	600 mV to 1000 V	600 mV to 600 V	600 mV to 600 V	600 mV to 600 V	600 mV to 600 V
AC Voltage	60 mV to 1000 V	60 mV to 1000 V	6 V to 1000 V	6 V to 1000 V	6 V to 1000 V	6 V to 1000 V	6 V to 1000 V	6 V to 600 V	6 V to 600 V	6 V to 600 V	6 V to 600 V
DCV + ACV	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
DCA Current	600 A to 600 mA	600 A to 10 A	600 mA to 10 A	60 A to 60 mA	n/a	60 mA to 10 A	600 mA to 10 A	n/a	n/a	n/a	n/a
ACA Current	600 A to 600 mA	600 A to 10 A	600 mA to 10 A	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
AC Clamp	10 A to 1000 A	10 A to 1000 A	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
Resistance	60 Ω to 600 MΩ	60 Ω to 600 MΩ	600 Ω to 60 MΩ	600 Ω to 60 MΩ	n/a	600 Ω to 60 MΩ	600 Ω to 60 MΩ	600 Ω to 60 MΩ	600 Ω to 60 MΩ	600 Ω to 60 MΩ	600 Ω to 60 MΩ
Temperature	-40°C to 800°C	-40°C to 800°C	-40°C to 400°C	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
Capacitance	1 nF to 100 mF	1 µF to 10 mF	n/a	1 µF to 10 mF	n/a	1 µF to 10 mF	1 µF to 10 mF	n/a	1 µF to 10 mF	n/a	1 µF to 10 mF
Frequency	99 Hz to 500 kHz	99 Hz to 99 kHz	99 Hz to 9.9 kHz	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
Continuity check	Yes	Yes	n/a	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Diode check	Yes	Yes	n/a	Yes	n/a	Yes	n/a	Yes	n/a	Yes	n/a
Conductance	n/a	Yes	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
Voltage detection	n/a	n/a	Yes	Yes	n/a	Yes	n/a	Yes	n/a	Yes	n/a

Additional Functions

Function	DT4281	DT4282	DT4252	DT4253	DT4254	DT4255	DT4256	DT4221	DT4222	DT4223	DT4224
AUTO AC/DCV	n/a	n/a	Yes	Yes	n/a	Yes	n/a	Yes	n/a	Yes	n/a
Peak measurement	DC/AC	Yes	n/a	Yes	n/a	Yes	n/a	n/a	n/a	n/a	n/a
Low-pass filter	Analog filter	Digital filter	n/a	Digital filter	n/a	Digital filter	n/a	Digital filter	n/a	Digital filter	n/a
Display update setting	Yes	Yes	n/a	Yes	n/a	Yes	n/a	Yes	n/a	Yes	n/a
Hold display value	AUTO / MANUAL	AUTO / MANUAL	Yes	Yes	n/a	Yes	n/a	MANUAL	AUTO / MANUAL	Yes	AUTO / MANUAL
Max/Min value display	Yes	Yes	n/a	Yes	n/a	Yes	n/a	n/a	n/a	n/a	n/a
Relative display	Yes	Yes	Yes	Yes	n/a	Yes	n/a	n/a	n/a	n/a	n/a
Decibel conversion	Yes	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
Percentage conversion display	Yes	n/a	Yes	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a
DC voltage polarity check	n/a	n/a	Yes	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a

Data Storage & Power

Feature	DT4281	DT4282	DT4252	DT4253	DT4254	DT4255	DT4256	DT4221	DT4222	DT4223	DT4224
Data Storage Capacity	Max 400 data	n/a	Yes	n/a	Yes	n/a	n/a	n/a	n/a	n/a	n/a
USB communication*1	Yes	Yes	n/a	Yes	n/a	Yes	n/a	n/a	n/a	n/a	n/a
Operating time (approx.)	100 hours*2	130 hours	40 hours	35 hours	n/a	n/a	n/a	n/a	n/a	n/a	n/a
Power supply	Alkaline (LR6) x4 / Manganese (R6P) x4	Alkaline (LR03) x4	Alkaline (LR03) x1	n/a	n/a	n/a	n/a	n/a	n/a	n/a	n/a

Display Features

Feature	DT4281	DT4282	DT4252	DT4253	DT4254	DT4255	DT4256	DT4221	DT4222	DT4223	DT4224
Back light	Yes	Yes	n/a	Yes	n/a	Yes	n/a	Yes	n/a	Yes	n/a
Dual display	Yes	Yes	Yes	Yes	n/a	Yes	n/a	n/a	n/a	n/a	n/a
Bar graph display	n/a	Yes	Yes	Yes	n/a	Yes	n/a	n/a	n/a	n/a	n/a

Safety Features

Feature	DT4281	DT4282	DT4252	DT4253	DT4254	DT4255	DT4256	DT4221	DT4222	DT4223	DT4224
Safety standard categories	CATIII1000 V/ CATIV600 V	CATIII1000 V/ CATIV600 V	CATIII600 V/ CATIV300 V	CATIII600 V/ CATIV300 V
Mis-insertion prevention shutters	Yes	n/a	n/a	n/a	n/a	Yes	n/a	n/a	n/a	n/a	n/a
Circuit breaker false trip prevention	n/a	n/a	n/a	n/a	n/a	Yes	n/a	n/a	n/a	Yes	n/a

Glossary of Terms

Auto AC/DCV: Automatically detects and measures AC and DC voltage.
Peak measurement: After starting PEAK value measurement, check maximum and minimum instantaneous voltage and current values.
Low-pass filter: Cuts high frequency content to provide stable numerical values for measurement.
Display update setting: Reduces the display value update rate to stabilize measurements.
Hold display value: Manual: press the button to freeze the display. Auto: the display freezes automatically when the measurement value is stable.
Max/Min value display: Pressing the MAX/MIN button displays the maximum and minimum displayed measurement values.
Relative display: Pressing the REL button displays subsequent measurements as values relative to that displayed when the button was pressed.
Decibel conversion: Displays AC voltage measurements converted to decibel values (dbm/dbv).
Percentage conversion display: Displays 4 to 20 mA (or 0 to 20 mA) signals converted to 0 to 100% values. (For the DT4253, only 4 to 20 mA).

Detailed Specifications

High-End DT4281/DT4282 Specifications

Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year.

DC Voltage

Range	Accuracy	Input Impedance
60.000 mV	±0.2 %rdg. ±25 dgt.	1 GΩ or more //100 pF or less
600.00 mV	±0.025% rdg. ±5 dgt.
6.0000 V	±0.025% rdg. ±2 dgt.
60.000 V	±0.03 %rdg. ±2 dgt.	10.3 MΩ ±2% //100 pF or less
600.00 V		10.2 MΩ ± 2% //100 pF or less
1000.0 V

AC Voltage

Range	Accuracy					Input Impedance
	20 to 45 Hz	45 to 65 Hz	65 to 1 kHz	1 k to 10 kHz	10 k to 20 kHz	20 k to 100 kHz
60.000 mV	±1.3 %rdg. ±60 dgt.	±0.4%rdg. ±40 dgt.	±0.6 %rdg. ±40 dgt.	±0.9 %rdg. ±40 dgt.	±1.5 %rdg. ±40 dgt.	±3.5 %rdg. ±40 dgt.	1 MΩ ± 4%//100pF or less
600.00 mV	±1 %rdg. ±60 dgt.	±0.2 %rdg. ±25 dgt.	±0.3 %rdg. ±25 dgt.	±0.4 %rdg. ±25 dgt.	±0.7 %rdg. ±40 dgt.	Undefined
6.0000 V	Undefined	Undefined	Undefined	Undefined	Undefined	Undefined
60.000 V		±0.3 %rdg. ±30 dgt.	±0.4 %rdg. ±30 dgt.	±0.4 %rdg. ±30 dgt.	±1.5 %rdg. ±45 dgt.	±3.5 %rdg. ±125 dgt.	10.3 MΩ ± 2.0% //100 pF or less
600.00 V							10.3 MΩ ± 2.0% //100 pF or less
1000.0 V							10.2 MΩ ± 2% //100 pF or less

DCV + ACV Measurement

Range	Accuracy						Input Impedance
	20 to 45 Hz	45 to 65 Hz	65 to 1 kHz	1 k to 10 kHz	10 k to 20 kHz	20 k to 100 kHz
6.0000 V	±1.2 %rdg. ±65 dgt.	±0.3 %rdg. ±30 dgt.	±0.4 %rdg. ±30 dgt.	±0.4 %rdg. ±30 dgt.	±1.5 %rdg. ±45 dgt.	±3.5 %rdg. ±125 dgt.	1 MΩ ± 4%//100pF or less
60.000 V	Undefined	Undefined	Undefined	Undefined	Undefined	Undefined	1 MΩ ± 4%//100pF or less
600.00 V							10.3 MΩ ± 2.0% //100 pF or less
1000.0 V							10.3 MΩ ± 2.0% //100 pF or less

AC Clamp (AC Current)

Range	Accuracy	DT4281 only
	40 to 65 Hz	65 to 1 kHz	1 k to 10 kHz	10 k to 20 kHz	20 k to 100 kHz
10.00 A	±0.6 %rdg. +2 dgt.	±0.9 %rdg. +2 dgt.	±2 %rdg. +2 dgt.	±4 %rdg. +2 dgt.	±0.9 %rdg. +2 dgt.	±0.9 %rdg. +2 dgt.
20.00 A	±0.6 %rdg. +4 dgt.	±0.9 %rdg. +4 dgt.	±2 %rdg. +4 dgt.	±4 %rdg. +4 dgt.	±0.9 %rdg. +4 dgt.	±0.9 %rdg. +4 dgt.
50.00 A	±0.6 %rdg. +10 dgt.	±0.9 %rdg. +10 dgt.	±2 %rdg. +10 dgt.	±4 %rdg. +10 dgt.	±0.9 %rdg. +10 dgt.	±0.9 %rdg. +10 dgt.
100.0 A	±0.6 %rdg. +2 dgt.	±0.9 %rdg. +2 dgt.	±2 %rdg. +2 dgt.	±4 %rdg. +2 dgt.	±0.9 %rdg. +2 dgt.	±0.9 %rdg. +2 dgt.
200.0 A	±0.6 %rdg. +4 dgt.	±0.9 %rdg. +4 dgt.	±2 %rdg. +4 dgt.	±4 %rdg. +4 dgt.	±0.9 %rdg. +4 dgt.	±0.9 %rdg. +4 dgt.
500.0 A	±0.6 %rdg. +10 dgt.	±0.9 %rdg. +10 dgt.	±2 %rdg. +10 dgt.	±4 %rdg. +10 dgt.	±0.9 %rdg. +10 dgt.	±0.9 %rdg. +10 dgt.
1000 A	±0.6 %rdg. +2 dgt.	±0.9 %rdg. +2 dgt.	±2 %rdg. +2 dgt.	±4 %rdg. +2 dgt.	±0.9 %rdg. +2 dgt.	±0.9 %rdg. +2 dgt.

The optional 9010-50, 9018-50, or 9132-50 CLAMP ON PROBE is used. Accuracy does not include the error of the clamp-on probe. Crest factor: 3 or less. Accuracy specification range: Minimum 1% of range; add ±5 dgt. when measuring at or below 5% of range.

Resistance Measurement

Range	Accuracy	Measurement Current	Open-terminal Voltage
600.0 Ω	±0.3 %rdg. ±20 dgt.	640 μA ±10%	DC2.5 V or less
6.000 kΩ	±0.03 %rdg. ±10 dgt.	96 μA ±10%
60.00 kΩ	±0.03 %rdg. ±2 dgt.	9.3 μA ±10%
600.00 kΩ	±0.15 %rdg. ±4 dgt.	0.96 μA ±10%
6.0000 MΩ	±1.5 %rdg. ±10 dgt.	96 nA ±10%
60.00 MΩ	±3.0 %rdg. ±20 dgt.
600.0 MΩ	±8.0 %rdg. ±20 dgt.

Accuracy guarantee condition: After zero adjustment has been performed.

Conductance (nS)

Range	Accuracy	Measurement Current	Open-circuit Voltage
600.00 nS	±1.5%rdg. ±10 dgt.	96 nA ±10%	DC2.5 V or less

Accuracy is defined for humidity 60% RH or less. Accuracy is defined for the range 20nS or more. In the case of 300 nS or more, ±20 dgt. is added.

Capacitance Measurement

Range	Accuracy	Measurement Current	Open-circuit Voltage
1.000 nF	±1 %rdg. ±20 dgt.	32 μA ±10%	DC2.5 V or less
10.00 nF	±1 %rdg. ±20 dgt.	32 μA ±10%	DC2.5 V or less
100.0 nF	±1 %rdg. ±5 dgt.	680 μA ±20%	DC3.1 V or less
1.000 µF	±1 %rdg. ±5 dgt.	680 μA ±20%	DC3.1 V or less
10.00 µF	±2 %rdg. ±5 dgt.	Approx. 10 μ/100 μ/200 μA	DC2.1 V or less
100.0 µF
1.000 mF
10.00 mF	±2 %rdg. ±20 dgt.	Approx. 100 μ/200 μA
100.0 mF

Temperature

Thermocouple Type	Range	Accuracy
K	-40.0 to 800.0 °C (-40.0 to 1472.0°F)	±0.5%rdg. ±3 °C (5.4°F)

The optional K Thermocouple DT4910 is used. Accuracy does not include the error of the K thermocouple.

Frequency (For AC V, DC+AC V, AC µA, AC mA, AC A)

Range	Accuracy
99.999 Hz	±0.005 %rdg. +3 dgt.
999.99 Hz	±0.005 %rdg. +3 dgt.
9.9999 kHz
99.999 kHz
500.00 kHz

Measurement range: 0.5Hz or more ([----] is displayed when frequency is less than 0.5Hz). Pulse width: 1µs or more (DUTY ratio is 50%). With the filter ON, accuracy is defined only for frequencies 100Hz or less. (For ACV, DC+ACV).

Peak Measurement (For AC V, DC V, DC+AC V, Clamp, DC µA, DC mA, AC A, AC mA, AC A)

Main measurement	Signal width	Accuracy
DCV	4ms or more (single)	±2.0%rdg. ±40 dgt.
	1ms or more (repeated)	±2.0%rdg. ±100 dgt.
Other than DCV	1ms or more (single)	±2.0%rdg. ±40 dgt.
	250µs or more (repeated)	±2.0%rdg. ±100 dgt.

Decibel Conversion Measurement : Standard impedance (dBm)

4/8/16/32/50/75/93/110/125/135/150/200/250/300/500/600/800/900/1000/1200 Ω (default : 600 Ω)

General Specifications

Specification	Details
Durability	Drop proof: YES
Operating temperature and humidity*1	-15°C to 55°C. Up to 40°C: 80%RH or less (non-condensating); 40°C to 45°C: 60%RH or less; 45°C to 55°C: 50%RH or less.
Storage temperature and humidity*2	-30°C to 60°C. 80%RH or less (non-condensating).
Applicable standards	Safety: EN61010, EMC: EN61326, Waterproof and dustproof: IP40
Safety	Maximum rated voltage between input terminals and ground: CATIII1000 V/ CATIV600 V. Maximum rated voltage between terminals: Between V and COM: 1000 V DC/AC. Maximum rated current between terminals: mA and COM: 600mA DC/AC; A and COM: 10A DC/AC.
Dimensions/Mass	93mm(W)×197mm(H)×53mm(D) / 650g (including batteries)
Accessories	TEST LEAD L9207-10, Instruction Manual, LR6 alkaline batteryx4

Standard Models DT4252/DT4253/DT4254/DT4255/DT4256 Specifications

Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year.

DC Voltage

Range	Accuracy	Input Impedance
High precision 600mV range*1	±0.2 %rdg. ±5 dgt.	10.2 MΩ ± 1.5 %
600.0 mV	±0.5%rdg. ±5 dgt.	10.2 MΩ ± 1.5 %
6.000 V		11.2 MΩ ± 2.0 %
60.00 V		10.3 MΩ ± 2.0 %
600.0 V		10.2 MΩ ± 1.5 %
1000 V	±0.3 %rdg. ±3 dgt.
1500 V*2	±0.3 %rdg. ±3 dgt.

*1: DT4252 only *2: DT4254 only

AC Voltage

Range	Accuracy		Input Impedance
	40 to 500 Hz	500 or more to 1kHz
6.000 V	±2.5 %rdg. ±3 dgt.	±1.0 %rdg. ±3 dgt.	11.2 MΩ ± 2.0%//100 pF or less
60.00 V	±1.0 %rdg. ±3 dgt.	±2.0%rdg. ±3 dgt.	10.3 MΩ ± 2.0%//100 pF or less
600.0 V	±2.0 %rdg. ±3 dgt.	±4.0 %rdg. ±3 dgt.	10.2 MΩ ± 1.5%//100 pF or less
1000 V

AUTO V (Identification)

Range	Accuracy	Input Impedance
600.0 V	DC, 40 to 500 Hz ±2.0%rdg. ±3 dgt.	500 or more to 1kHz ±4.0 %rdg. ±3 dgt.	900 kΩ ± 20%

DT4253, DT4254, DT4255, DT4256 only. Crest factor: 3 up to 4000 counts and reduces linearly to 2 at 6000 counts. For ACV, minimum 1% of range; add ±5 dgt. when measuring at or below 5% of range. With the filter ON, the accuracy is not specified in 100Hz/500Hz or more.

DCA Measurement

Range	Accuracy	Input Impedance
60.00 μA	±0.8 %rdg. ±5 dgt.	1 kΩ±5%
600.0 μA	±0.8 %rdg. ±5 dgt.
6.000 mA	±0.8 %rdg. ±5 dgt.
60.00 mA	±0.8 %rdg. ±5 dgt.*1
600.0 mA	±0.9 %rdg. ±5 dgt.	35 mΩ±30%
6.000 A	±0.9 %rdg. ±3 dgt.*2	35 mΩ±30%
10.00 A	±0.9 %rdg. ±3 dgt.*2	35 mΩ±30%

*1: DT4256: ±1.8 %rdg. ±15 dgt. Input Impedance: 35 mΩ±30%
*2: DT4252: ±0.9 %rdg. ±5 dgt.

ACA Measurement

Range	Accuracy		Input Impedance
	40 to 500 Hz	500 or more to 1kHz
600.0 mA*1	±1.4 %rdg. ±5 dgt.	±1.8 %rdg. ±5 dgt.	35 mΩ±30%
6.000 A	±1.4 %rdg. ±3 dgt.	±1.8 %rdg. ±3 dgt.	35 mΩ±30%
10.00 A	±1.4 %rdg. ±3 dgt.	±1.8 %rdg. ±3 dgt.	35 mΩ±30%

*1: DT4256 only. Crest factor: 3 up to 4000 counts and reduces linearly to 2 at 6000 counts. Accuracy specification range: Minimum 1% of range; add ±5 dgt. when measuring 300 counts or less.

Continuity Check

Range	Accuracy	Measurement Current	Open-terminal Voltage
600.0 Ω	±0.7 %rdg. ±5 dgt.	Approx. 200 μA	DC1.8 V or less

Continuity ON threshold: Approx. 25 Ω or less (continuous buzzer sound, red LED lights). Continuity OFF threshold: Approx. 245 Ω or more.

Diode Check

Range	Accuracy	Measurement Current	Open-terminal Voltage
1.500 V	±0.5 %rdg. ±5 dgt.*1	Approx. 0.5 mA (DT4222) Approx. 0.2 mA (DT4224)	DC2.5 V or less

*1: DT4255: ±0.5 %rdg. ±8 dgt. Forward threshold: Buzzer sounds intermittently at 0.15V to 1.5V, the red LED flashes.

Resistance Measurement

Range	Accuracy	Measurement Current	Open-terminal Voltage
600.0 Ω	±0.7 %rdg. ±5 dgt.	Approx. 200 μA	DC1.8 V or less
6.000 kΩ	±0.7 %rdg. ±3 dgt.*1	Approx. 100 μA
60.00 kΩ	±0.9 %rdg. ±3 dgt.*1	Approx. 10 μA
600.00 kΩ	±1.5 %rdg. ±3 dgt.*1	Approx. 1 μA
6.000 MΩ		Approx. 100 nA
60.00 MΩ		Approx. 10 nA

Accuracy guarantee condition: After zero adjustment has been performed. *1: DT4252/4253: ±5dgt.

Capacitance Measurement

Range	Accuracy	Measurement Current	Open-terminal Voltage
1.000 µF	±1.9 %rdg. ±5 dgt.	Approx. 10 n/100 n/1 μA	DC1.8 V or less
10.00 µF	±1.9 %rdg. ±5 dgt.	Approx. 10 n/100 n/1 μA	DC1.8 V or less
100.0 µF	±5.0 %rdg. ±20 dgt.	Approx. 1 μ/10 μ/100 μA
1.000 mF	±5.0 %rdg. ±20 dgt.	Approx. 1 μ/10 μ/100 μA
10.00 mF		Approx. 10 μ/100 μ/200 μA
100.0 mF		Approx. 100 μ/200 μA

Temperature

Thermocouple Type	Range	Accuracy
K	-40.0 to 400.0 °C	±0.5%rdg. ±2 °C

The optional K Thermocouple DT4910 is used. Accuracy does not include the error of the K thermocouple.

General Specifications

Specification	Details
Durability	Drop proof: YES
Operating temperature and humidity*1	-10°C to 50°C (DT4221, DT4222); -10°C to 65°C (DT4223, DT4224). Up to 40°C: 80%RH or less (non-condensating); 40°C to 45°C: 60%RH or less; 45°C to 65°C: 50%RH or less.
Storage temperature and humidity*2	-30°C to 60°C (DT4221, DT4222); -30°C to 70°C (DT4223, DT4224). 80%RH or less (non-condensating).
Applicable standards	Safety: EN61010, EMC: EN61326, Waterproof and dustproof: IP42
Safety	Maximum rated voltage between input terminals and ground: CAT III 600V/ CAT IV 300V. Maximum rated voltage between terminals: Between V and COM: 600 V DC/AC.
Dimensions/Mass	72mm(W)×149mm(H)×38mm(D) / 190g (including batteries and holster)
Accessories	TEST LEAD DT4911, Instruction Manual, LR03 Alkaline batteryx1, Holster

Pocket Models DT4221/DT4222/DT4223/DT4224 Specifications

Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year.

DC Voltage

Range	Accuracy	Input Impedance
600.0 mV	±0.5 %rdg. ±5 dgt.	11.2 MΩ ± 2.0 %
6.000 V		11.2 MΩ ± 2.0 %
60.00 V		10.3 MΩ ± 2.0 %
600.0 V		10.2 MΩ ± 1.5 %

AC Voltage

Range	Accuracy		Input Impedance
	40 to 500Hz	500 or more to 1kHz
6.000 V	±2.5 %rdg. ±3 dgt.	±1.0 %rdg. ±3 dgt.	11.2 MΩ ± 2.0%//100 pF or less
60.00 V	±1.0 %rdg. ±3 dgt.	±2.0%rdg. ±3 dgt.	10.3 MΩ ± 2.0%//100 pF or less
600.0 V	±2.0 %rdg. ±3 dgt.	±4.0 %rdg. ±3 dgt.	10.2 MΩ ± 1.5%//100 pF or less

AUTO V (Identification)

Range	Accuracy	Input Impedance
600.0 V	DC, 40 to 500 Hz ±2.0%rdg. ±3 dgt.	500 or more to 1kHz ±4.0 %rdg. ±3 dgt.	900 kΩ ± 20%

DT4221, DT4223 only. Crest factor: 3 up to 4000 counts and reduces linearly to 2 at 6000 counts. For ACV, minimum 1% of range; add ±5 dgt. when measuring at or below 5% of range. With the filter ON, the accuracy is not specified in 100Hz/500Hz or more.

Electric Charge

Detection Voltage Range	Detection Target Frequency
AC80 V to AC600 V	50 Hz / 60 Hz

During voltage detection, a continuous buzzer sounds.

Continuity Check

Range	Accuracy	Measurement Current	Open-terminal Voltage
600.0 Ω	±1.0 %rdg. ±5 dgt.	Approx. 200 μA	DC1.8 V or less (DT4221/DT4222) DC2.0 V or less (DT4223/DT4224)

Continuity ON threshold: Approx. 25 Ω or less (continuous buzzer sound). Continuity OFF threshold: Approx. 245 Ω or more.

Diode Check

Range	Accuracy	Measurement Current	Open-terminal Voltage
1.500 V	±0.9 %rdg. ±5 dgt.	Approx. 0.5 mA (DT4222) Approx. 0.2 mA (DT4224)	DC2.5 V or less

Resistance Measurement

Range	Accuracy	Measurement Current	Open-terminal Voltage
600.0 Ω		Approx. 200 μA	DC1.8 V or less (DT4222) DC2.0 V or less (DT4223/DT4224)
6.000 kΩ	±0.9 %rdg. ±5 dgt.	Approx. 100 μA
60.00 kΩ		Approx. 10 μA
600.00 kΩ		Approx. 1 μA
6.000 MΩ		Approx. 100 nA
60.00 MΩ	±1.5%rdg. ±5 dgt.	Approx. 10 nA

Accuracy guarantee condition: After zero adjustment has been performed.

Capacitance Measurement

Range	Accuracy	Measurement Current	Open-terminal Voltage
1.000 µF	±1.9 %rdg. ±5 dgt.	Approx. 10 n/100 n/1 μA	DC1.8 V or less (DT4222) DC2.0 V or less (DT4223/DT4224)
10.00 µF	±1.9 %rdg. ±5 dgt.	Approx. 10 n/100 n/1 μA	DC1.8 V or less (DT4222) DC2.0 V or less (DT4223/DT4224)
100.0 µF	±5.0 %rdg. ±20 dgt.	Approx. 1 μ/10 μ/100 μA
1.000 mF	±5.0 %rdg. ±20 dgt.	Approx. 1 μ/10 μ/100 μA
10.00 mF		Approx. 10 μ/100 μ/200 μA
100.0 mF		Approx. 100 μ/200 μA

Frequency

Range	Accuracy
99.99 Hz	±0.1 %rdg. +2 dgt.
999.9 Hz
9.999 kHz

Options and Accessories

Enhance the functionality of your HIOKI digital multimeter with a range of optional accessories.

Test Leads and Probes

TEST LEAD L9207-10: 90 cm cable, CAT III 1000V/CAT IV 600V.
TEST LEAD DT4911: 54 cm cable, CAT IV 300V/CAT III 600V.
CONTACT PIN SET L4933: For DC70V/AC33V.
SMALL ALLIGATOR CLIP SET L4934: CAT III 300V.
CONNECTION CABLE L4930: 1.2m length.
TEST PIN SET L4938, ALLIGATOR CLIP SET L4935, BUS BAR CLIP SET L4936, BREAKER PIN L4939, TEST PIN SET L4932, GRABBER CLIP 9243, MAGNETIC ADAPTER SET L4937, EXTENSION CABLE SET L4931.

AC Clamp-On Probes

Adapter 9704 required for connection to DT4281, DT4253, DT4255, DT4256.

9010-50: AC 10/20/50/100/200/500 A.
9018-50: AC 20/50/100/200/500/1000A.
9132-50: AC 50/100/200/500/1000A.

Other Options

THERMOCOUPLES (K) DT4910: For temperature measurement (-40 to 260°C).
COMMUNICATION PACKAGE (USB) DT4900-01: For PC data management.
MAGNETIC STRAP Z5004
MAGNETIC STRAP C0200
CARRYING CASE C0202 (DT4220 Series)
CARRYING CASE C0201 (DT4250/DT4280 Series)
CARRYING CASE 3853 (DT4250 Series)

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Safety First: Preventing Accidents in Field Measurements

Erroneous Circuit-Breaker Activation

Conventional Digital Multimeters vs. DT4223/DT4224

Key Safety Features Across the DT4200 Series

Measurement Categories and Safety Standards

Measurement Category Suitability

Field-Proven Strength and Usability

Robust Design

Enhanced Usability

Advanced Functions

Model Overview

High-End Models

Standard Models

Pocket Models

Key Specifications Comparison

Basic Characteristics Comparison

Measurement Items (Typical Ranges)

Additional Functions

Data Storage & Power

Display Features

Safety Features

Glossary of Terms

Detailed Specifications

High-End DT4281/DT4282 Specifications

DC Voltage

AC Voltage

DCV + ACV Measurement

AC Clamp (AC Current)

Resistance Measurement

Conductance (nS)

Capacitance Measurement

Temperature

Frequency (For AC V, DC+AC V, AC µA, AC mA, AC A)

Peak Measurement (For AC V, DC V, DC+AC V, Clamp, DC µA, DC mA, AC A, AC mA, AC A)

Decibel Conversion Measurement : Standard impedance (dBm)

General Specifications

Standard Models DT4252/DT4253/DT4254/DT4255/DT4256 Specifications

DC Voltage

AC Voltage

AUTO V (Identification)

DCA Measurement

ACA Measurement

Continuity Check

Diode Check

Resistance Measurement

Capacitance Measurement

Temperature

General Specifications

Pocket Models DT4221/DT4222/DT4223/DT4224 Specifications

DC Voltage

AC Voltage

AUTO V (Identification)

Electric Charge

Continuity Check

Diode Check

Resistance Measurement

Capacitance Measurement

Frequency

Options and Accessories

Test Leads and Probes

AC Clamp-On Probes

Other Options

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