HIOKI DT4255 Digital Multimeter

Digital Multimeter with Fuse-protected Terminals Ideal for Harsh Work Environments

OVERVIEW

The Hioki DT4200 Digital Multimeter Series consist of a complete lineup of 9 models ranging from professional to industrial to pocket meters, delivering a super fast response rate and safety features that take electrical testing to a higher level. The DT4255 is a digital multimeter designed for maximum safety with voltage measurement terminals that are protected by a fuse.

CAT IV 600 V, CAT III 1000 V

Key Features

FEATURES

Digital Multimeter designed for maximum safety with fuse-protected terminals
- Accepts an AC clamp sensor.
- Voltage detection function

Thorough prevention of shortcircuit accidents
When using the resistance measurement function, a protective circuit functions to prevent a short-circuit accident in the event of erroneous operation such improperly supplying voltage input. Even if a short-circuit occurs inside the tester, a current-limiting resistor will limit any short-circuit
current while a fast-blow fuse quickly and reliably disconnects the tester circuitry, preventing a short-circuit accident.

Clamp-on sensorbased current measurement eliminateｓ the cause of accidents
Mistakenly measuring voltage using the current range may lead to a short-circuit. The DT4255 eliminates the root cause of such accidents by providing clamp-on sensorbased current measurement functionality instead of using conventional probes.

Measure output voltage on the secondary sides of inverters by eliminating harmonic components
Accurately measure the fundamental wave alone by eliminating harmonic components with the DMM’s low-pass filter function.

Measurement data can be downloaded to, reviewed on, and saved to a computer.
If you connect the DT4255 to a computer with the optional Communication Package DT4900-01, you can graph data stored in the instrument’s internal memory and display measurement results in real time on the computer. In addition, displayed measured values can be saved (in text format).　

*The computer and multimeter are electrically isolated by means of optical communications so that data can be sent without concern for electrical hazards.

True RMS measurement for accurate measurement of even distorted current waveforms
Digital multimeters implement two types of measurement: mean-value measurement and true RMS measurement. The two methods yield significantly different measurement results for current waveforms, which are often distorted. For accurate measurement, it is necessary to use an instrument with true RMS capability.

Designed and manufactured in Japan to ensure high quality and guaranteed with a 3-year warranty for peace of mind

All development, design, and manufacturing processes for almost all Hioki digital multimeters are carried out at our Head Office in Nagano Prefecture. Some of the industry’s most advanced technological capabilities enable us to deliver products of the highest possible quality.

Safe measurement requires use of an instrument that suits the measurement location.

To ensure operators’ ability to use measuring instruments safely, IEC 61010 classifies the locations in which instruments are used into a series of safety-based measurement categories (ranging from CAT II to CAT IV). Using an instrument that does not satisfy the required safety level can lead to an electrical accident.


 

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SPECIFICATIONS

Basic specifications
Accuracy guaranteed: 1 year
Regarding DMM Accuracy: Due to the many ranges and functions available in a DMM, only the basic accuracy is indicated for reference. Please refer to the brochure for detailed accuracy information.
 

DC Voltage range	600.0 mV to 1000 V 5 ranges, Basic accuracy: ±0.3 % rdg. ±3 dgt.
AC Voltage range	6.000 V to 1000 V, 4 ranges, Frequency characteristics: 40 Hz to 1 kHz Basic accuracy 40 - 500 Hz : ±0.9 % rdg. ±3 dgt. (True RMS, crest factor 3)
AUTO AC/DCV	Yes
Resistance range	600.0 Ω to 60.00 MΩ, 6 ranges, Basic accuracy: ±0.7 % rdg. ±3 dgt.
DC Current range	N/A
From 4 to 20mA Percentage conversion display	N/A
AC Current range (use with Clamp on probes)	10.00 A to 1000 A, 7 ranges, Add the Clamp on probe accuracy to basic accuracy 40 - 1 kHz : ±0.9 % rdg. ±3 dgt. (True RMS, crest factor 3)
Temperature (thermocouples)	N/A
Voltage detection	Hi: AC40 V to 600 V, Lo: AC80 V to 600 V
Capacitance range	1.000 μF to 10.00 mF, 5 ranges, Basic accuracy: ±1.9 % rdg. ±5 dgt.
Frequency range	99.99 Hz to 99.99 kHz, 4 ranges (limited by the minimum detectable voltage), Basic accuracy: ±0.1 % rdg. ±1 dgt.
Continuity check	Continuity threshold [ON]: 25 Ω or less , [OFF]: 245 Ω or more, Response time: 0.5 ms or more
Diode test	Open terminal voltage: 5.0 V or less, Testing current 0.5 mA or less, Threshold of forward voltage: 0.15 V to 1.5 V
Other functions	Filter function, display value hold, auto hold, MAX/MIN/Average value display, relative value display, auto-power save, USB communication (option)
Display	Main and Sub displays: 4-digits LCD, max. 6000 digits, bar graph
Display refresh rates	5 times/s (Capacitance measurement: 0.05 to 5 times/s, depending on measured value, Frequency: 1 to 2 time/s)
Power supply	LR03 alkaline batteries ×4, Continuous use: 130 hours (backlight OFF)
Dimensions and mass	84 mm (3.31 in)W × 174 mm (6.85 in)H× 52 mm (2.05 in)D, 390 g (13.8 oz) (including batteries and holster)
Included accessories	Test lead L9207-10 ×1, Holster ×1, Instruction manual ×1, LR03 alkaline battery ×4