Hioki DT4223 - Digital Multimeter with Resistance Measurement For Electrical Work

It’s extremely dangerous to measure a commercial power supply with an instrument set to the resistance range (used to measure continuity, capacitance, and diodes). Doing so can cause electrical equipment to stop operating due to tripped circuit breakers or result in arcing.

The Hioki DT4223 Digital Multimeter prevents potential hazards that can be caused by erroneous instrument operation with a one-of-a-kind design. With the DT4223 the measurement circuit is switched after the instrument detects resistance, or continuity. Even if you mistakenly input voltage with the instrument set to the resistance range, the high input impedance will limit the current flowing to the instrument to 1.5 mA or less to prevent potential hazards. When the DT4223 detects resistance, or continuity, the LoZ icon is shown on the display, allowing you to identify at a glance which measurement circuit has been selected.

The Hioki DT4200 Digital Multimeter Series consists of a diverse array of meters 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 Hioki DT4223 is a pocket-sized digital multimeter featuring an innovating circuit-breaker false trip prevention function to enhance testing safety and a built-in voltage detector, ideal for electrical inspections.

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

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

Erroneous circuit-breaker activation

Arcing and sparks

Conventional Digital Multimeters

Because changing the measurement range also changes the measurement circuit, mistakenly inputting voltage with the instrument set to the resistance range will cause a large current to flow to the device, leading to hazards such as tripped circuit breakers and arcing.

Voltage range measurement circuit

Resistance range measurement circuit

DT4223 / DT4224 Digital Multimeter

The measurement circuit is switched after the instrument detects resistance, continuity, capacitance, or diode input. Even if you mistakenly input voltage with the instrument set to the resistance range, the high input impedance will limit the current flowing to the instrument to 1.5 mA or less to prevent potential hazards.

Resistance range measurement circuit

Input-based switching of the measurement circuit

Safe testers that protect workers from dangerous accidents

Engineered based on extensive customer feedback, the Hioki Digital Multimeter DT4200 series delivers the design and quality needed in order to ensure safety in field measurement.
 

Prevent unavoidable debris from shorting the  measurement target and causing an accident.

The DT4255’s voltage input terminals incorporate a protective fuse so that contamination of the instrument’s internal components with iron powder or other particulate matter will not result in an internal short-circuit. The fuse can be replaced easily on site.


 

Continued high input may result in major accidents such as fire.

To prevent an accident, a warning function immediately notifies the operator if the DMM receives excessively high input.
*Red screen available on high-end models and DT4223/DT4224 only.

Wrong insertion may lead to short-circuits.

The DT4281 and DT4282 use terminal shutters to keep  probes from being inserted into the wrong inlets. The  shutters block whichever terminal is not being used based  on the selected measurement function.


 

Mistakenly measuring voltage using the current range may lead to a short-circuit.

The DT4281, DT4253, DT4255, and DT4256 eliminate the  root cause of such accidents by providing clamp-on sensor- based current measurement functionality instead of using  conventional probes.

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.

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.

Field-Proven Strength and Usability DT4200 series

Fast, accurate measurement of the output voltage on the secondary side of an inverter

The DT series can accurately measure the voltage on the secondary side of an inverter, just like a power meter. Its low-pass filter rejects harmonic components so that the fundamental wave can be isolated and accurately measured.

The DT series can accurately measure the voltage on the secondary side of an inverter, just like a power meter. Its low-pass filter rejects harmonic components so that the fundamental wave can be isolated and accurately measured.
 

True RMS measurement for accurate measurement of  even distorted current waveforms

Current waveforms are often distorted, causing the average-value  and true RMS measurement methods to yield different results. To  obtain accurate readings, RMS measurement is indispensable.
 

Outstanding viewing angle so display is easy to read at  an angle or even in a dim location

The DT4200 series features a display  with a wide viewing angle and a  backlight function so that it’s easy to  read, even when you can’t view the  screen from the front or when making  measurements in a dim location.
 

Outstanding hands-free ease of use in the field when working with numerous measurement locations

It’s hard to carry out work tasks smoothly  when you’re juggling a measuring instrument,  probes, recording paper, and other supplies.  Field concerns like these are resolved by the  DT4200’s magnetic strap, auto-hold function,  and ability to save results in its internal  memory. These capabilities boost work  efficiency and help reduce work times.
*The auto-hold function is available exclusively in high-end,  standard models and DT4223,DT4224. The ability to save  results in internal memory is available exclusively in high- end models.
 

Extensive selection of probe tips that you can choose based on the measurement location, improving ease of measurement

With the DT4200, you can choose the probe  type that best suits your measurement  location, making it possible to measure in  areas that can’t be reached with conventional  probes and busbars that you wish to clamp  between probes.
*Compatible probe tips vary with the DMM model. The optional Connection Cable L4930 is  required in order to use the probes shown at the left.