9 April 2020 : Inspecting Medical Equipment for Leakage Current – Hioki ST5540

During this global pandemic, the need for medical equipment such as ventilators cannot be overstated, and manufacturers all over the world are rushing to meet the demand. As with most electrical equipment, medical devices must also be tested for safety, especially since the devices often come into direct contact with the patient or healthcare worker.

IEC 60601-1 Ed. 3 is a widely accepted safety standard for medical electrical equipment. Part of the standard addresses patient leakage current, i.e., leakage current that flows through a patient connected to an applied part or parts. The Hioki ST5540 Leak Current HiTester was developed to meet the requirements for this particular testing application. Among the many features, the ST5540:

  • Complies with IEC 60601-1 Ed.3.0:2005, IEC 60601-1 Amd.1 Ed.3.0:2014, and JIS T 0601-1:2017.
  • Provides an uninterrupted-power polarity switching function.
  • Supports current ratings of up to 20 A
  • Can measure protective conductor current
  • Provides an extensive range of check functionality

Leak Current Parameters For Medical-Use Electrical Devices : 

  • Ground Leak Current
  • Contact Current
  • Patient Leak Current
  • Patient Measurement Current

The ST5540 provides a single solution for measuring all these leak current variants.


Complies with IEC 60601-1:2005 +A1:2012 (Ed 3.1)

In order to prevent the danger of electric shock, electrical devices use power supplies that are isolated from parts of the device that may come into contact with the body. However, it is impossible to achieve infinite insulation resistance. Some leak current always exists, and its magnitude changes as the insulation degrades over time. The LEAK CURRENT HiTESTER ST5540 provides an easy-to-operate solution for measuring leak current in electrical devices, making it eminently suitable for use in an extensive array of applications, ranging from production lines to equipment maintenance and inspections.

Comparison of ST5540 Functionality
ST5540 vs General Use Electrical Devices


ST5540 Product Features

  • Compliance with  IEC 60601-1:2005 Ed 3.0 , JIS T 0601-1:2012. 
    (*Starting on June 1, 2012, medical electrical equipment sold in the EU must comply). Model ST5540 comply with IEC 60601-1:2005 +A1:2012 (Ed 3.1), and IEC 62353 of 2017

Model ST5540 comply with. IEC 60601-1:2005+A1:2012(Ed. 3.1), and IEC 62353 of 2017.

Compliance with Electrical Appliances and Materials Safety Act, JIS, IEC, and UL standards for general-use electrical devices.

  • Uninterrupted Polarity Switching Function
    The ability to conduct tests without turning off the power when switching the power supply polarity dramatically reduces cycle times.

The ST5540 can switch polarity without stopping the supply of power to the device under measurement. Old models require that the device under measurement be turned off and then back on again when switching polarity, but ST5540  let you progress smoothly to the next testing process.

  • Support for rated currents of up to 20 A
    Medical devices that incorporate a computer or sophisticated measurement system are becoming increasingly common. Consequently, these devices have increasingly high rated capacities. By increasing the rated capacity of 15A for the previous product (3156) to 20A, Hioki has made it possible to perform leak current testing for a broader range of medical devices.

    • Simple, interactive operation
      The ST5540/ST5541 uses a touch panel that lets you configure settings by touching selections in response to information displayed on the ipanel, keeping operation.
    • Ability to store up to 30 sets of measurement conditions
      The instrument can save and load up to 30 sets of measurement conditions, allowing you to immediately switch between conditions.
    • Save measurement data for 100 devices
      Measurement data (peak values) can be stored in the instrument’s built-in memory. Saved data can be checked on the stored data reference screen after measurement is complete. Data can be stored for up to 100 test targets, with each target being identified by a registered device name and control number. Additionally, the instrument can store a maximum of 2,000 peak value data points. Together, these capabilities eliminate the need to jot down measured values at the measurement site.

  • Improved test reliability – Blown fuse check function
    When measurement starts, the instrument checks for unintentional probe misalignment using of a preconfigured lower limit setting.
  • Safety conductor current measurement function
    The ST5540/ST5541 can perform safety conductor current measurement as defined in standards such as IEC 60990 and IEC 60950-1.
  • Automatic measurement functionality
    Simple operation allows you to switch power supply polarity and automatically make measurements with the target device in the normal and single-fault states, displaying the peak values. You can also set the measurement time and wait time. These capabilities help reduce operation time.
  • Circuit breaker for device under measurement
    The instrument’s workbench-type design features a terminal block and a circuit breaker on the front panel, making it deal for embedding in test lines and simplifying connectivity with the device being measured, even while rack-mounted.
  • 110% voltage application jack
    The instrument’s 110% voltage application jack, which is used during testing of medical devices, outputs the target device line power supply voltage as-is. The polarity can be switched (ST5540 only).

  • Standard USB interface
    The ST5540/ST5541’s standard USB interface simplifies automatic testing on manufacturing lines and in similar installations.
  • Standard RS-232C port
    The ST5540/ST5541’s standard RS-232C port can be used to control the instrument from a computer and to print data using the 9442 printer (option)
  • Separation of the instrument’s power supply and target device lines
    The instrument’s power supply and target device line power supply are separated, helping prevent damage due to the inadvertent input of an incorrect supply voltage. There’s no need to change the ST5540/ST5541’s supply voltage, even if the target device’s supply voltages changes.

  • Printing saved data – Printer 9442 (Sold Separately)
    The optional PRINTER 9442 can be used to print data via the instrument’s RS-232C interface, providing a convenient way to attach a hard copy of test data.
  • Combine with Hioki AC Grounding HiTester 3157 to meet JIS T 1022:2006
    Safety requirements of electrical installations for medically used rooms in hospitals and clinics.
    Measuring between the grounding center and grounding terminal :Verify that the electrical resistance between the medical outlet’s grounding electrode connector or medical ground terminal and medical ground center is less than or equal to 0.1 Ω by applying a current of approximately 25 A with an AC current with a no-load voltage of 6 V or less and measuring the resistance using the voltage droop method. Combination of Instruments for Leak Current Testing and Safety Conductor Testing The following are key parts of any safety inspection of electrical equipment:

    Leak current test: Measure with the ST5540 (medical use and electrical devices) and ST5541 (electrical devices only)

    Safety conductor test (also known as a ground line resistance test or ground conductor test): Measure with the 3157.

    The 3157 can also be used for conducting measurements under the JIS T 1022:2006 safety standard for hospital electrical equipment.

    Download Leak Current HiTester ST5540/ST5541 Product Catalog
    Download ST5540 Userguide 

1 April 2020 : Commemorating 35th Anniversary of Hioki Battery Tester Series!


Did you know that the history of HIOKI’s battery tester series began with the release of the AC Milliohm HiTester 3225 in 1986?

In 2020, Hioki commemorates its 35th anniversary as a strong leader in the industry. Hioki has seen the battery industry through its most critical stage of growth—the development and maturity of the Lithium-ion battery (LIB). LIB production sites of top battery manufacturers have proactively used HIOKI’s battery testers, starting in Japan, then spreading globally to Korea and China. Today, Hioki is trusted around the globe as the world’s de facto standard of battery testers for production as well as R&D.

The Hioki BT4560 battery impedance tester measures the impedance of lithium-ion batteries using the low-frequency AC-IR measurement method without charging and discharging the battery, substantially reducing the time needed to inspect the internal resistance of battery cells. Click here to find out more:


19 Feb 2020 : Hioki Power and Data Logger For HVAC Power Consumption Saving

Hioki Power and Data Logger For HVAC Power Consumption Saving


♦ What is HVAC?

Figure 1.0 Air Conditioning System Components And Cycle

HVAC stands for Heating, Ventilation, and Air Conditioning system. It provides heating or cooling and ventilation services to residential and commercial buildings [1] for thermal control and comfort. This system applies the principles of thermodynamics, fluid mechanics, and heat transfer for its functionality. The HVAC system consumes power to enable the heat transfer process to take effect. This article focuses on the air conditioning system in particular.


Figure 2.0 Air Conditioning Impact On The Environment


♦ Air Conditioning System And Its Impact
A few factors are known to affect the power consumption of the air conditioner as follow [4]:
1. Indoor air temperature
2. Outdoor air temperature
3. Thermal insulation of room
4. Air conditioner temperature setting

As there’s little or no control over the first three factors above, only the air conditioner temperature setting can help in power consumption saving. Hioki’s Clamp On Power Logger PW3360-21 is used to record the power consumption of a ceiling cassette air conditioner by different temperature settings and subsequently calculate the cost of electricity usage. At the same time, Hioki’s Wireless Voltage/Temp Logger LR8515 records the concurrent temperature readings during each setting period. The temperature settings are evaluated at the same location and period of the day over different days.

Figure 3.0 and Figure 4.0 show the integrated active power, and cumulative energy cost respectively on an hourly basis. The temperature setting of 22°C gives a consistent lower power consumption and cost compared to other temperature settings*.


Figure 3.0 Integrated Active Power By Time


Figure 4.0 Cumulative Energy Cost By Time Air Conditioner Power Consumption Saving


Figure 5.0 Temperature Data Log For Different Air Conditioner Temperature Setting

The temperature logging data (Figure 5.0) shows a steady temperature trend with low hour-to-hour fluctuations for the 22°C setting.


Figure 6.0 Estimated Annual Energy Consumption And Cost By Temperature Setting

Using this data, the estimated annual energy consumption and cost (Figure 6.0) is the lowest at the setting of 22°C*. This is a staggering 42% lower than the 20°C setting and 65% lower than the 24°C setting. The significant impact on energy cost shows the importance of finding the optimum temperature setting of an air conditioning system. Hence, Hioki’s Clamp On Power Logger PW3360-21 is a highly beneficial tool to determine the best temperature setting for the power consumption saving of a HVAC system.


Other than HVAC power consumption saving, the following can also be done at manufacturing facilities for energy saving efforts [6]:
1. Lighting usage – Switch off lights when not in use or install an automated lighting system based on room occupancy or daylight availability
2. Turn off and run equipment only on-demand – Air compressor, in particular, can use up to 20% of power usage [7] which have significant cost impact
3. Shade windows – This reduces heat from the direct sun from entering the building and thus reducing the air-conditioning requirements
4. Replace existing lights with LED – LED lights, especially ENERGY Star rated products, use 75% less energy and last 25 times longer than incandescent lighting [8]


In summary, energy consumption saving helps energy cost reduction and reduces the global warming effect. HVAC best setting for maximum power consumption saving can be easily determined using Hioki’s Clamp On Power Logger PW3360-21 and Wireless Voltage/Temp Logger LR8515 for temperature monitoring.


♦ Also Available
Clamp on Power Logger PW3365: World’s first non-metallic contact power meter and energy logger

♦ Advanced Energy Analysis
For more advanced surveys of power quality, we recommend the HIOKI PQ3198 or the PQ3100.


*Disclaimer: The concluded 22°C temperature setting is based solely on our study of a ceiling cassette air conditioner and one compressor type in a commercial office. Readers should not misconstrue this value to represent the universal best temperature setting for air conditioner energy cost-saving purposes. The temperature ranges of 22°C to 25°C are known to give both comfort and cost-saving [5] . Kindly approach our sales representatives for more information on studying the power consumption at your facility using Hioki’s power logger and data logger.


♦ Download Product Catalogs Here

Catalog: WIRELESS MINI LOGGER LR8515 Download PDF [3MB] English
Catalog: CLAMP ON POWER LOGGER PW3360 Download PDF  [5MB] English
Catalog: CLAMP ON POWER LOGGER PW3365 Download PDF  [8MB] English
Catalog: POWER QUALITY ANALYZER PQ3198, PQ3100 Download PDF  [3MB] English


♦ For Full Application Note, Please Fill In Your Details Below and Check Your Mailbox

* indicates required

18 Feb 2020 : Verify the Energy Savings Created by PV Systems

Verify the Energy Savings Created by PV Systems
Measure the amount of electricity generated by PV systems to verify the effectiveness and cost savings on the spot

♦ How is Energy Savings Measured?
The process of measuring energy savings is known as “Measurement & Verification” or “M&V” whereby measurement technologies are used to reliably identify the actual savings created as a result of energy saving measures. Although energy savings cannot be directly measured because that represents the absence of energy consumption, you can determine the effects of energy saving measures by comparing the energy cost before and after the installation of new equipment such as a solar or photovoltaic (PV) panels.

M&V activities include, among others:
• Installing meters
• Gathering data
• Developing computation methods to analyze data and plotting it against energy rates
• Reporting and quality assurance efforts
Often it is necessary to report to a customer or third party of the effects of the energy saving measures; in any case, it is always wise to verify that any new installed equipment is successful in cutting energy costs.


♦ Measuring and Computing Cost Savings
When verifying the effectiveness of PV equipment in reducing energy costs, the simplest way is to compute savings in monetary units based on the same energy usage before and after the installation. This method is sufficient for a typical household. However, large industrial facilities that invest heavily in energy savings equipment operate on a scale such that close monitoring of power consumption and energy conversion can lead to huge savings. In addition, some power utilities provide incentive programs to buy back any excess energy a PV system generates. This further increases the savings, but complicates the computations even more.


♦ What Type of Power Meter Should be Used to Measure Energy Savings?
M&V processes should be as accurate as required, but the costs should be small relative to the actual costs savings of the project. It is not practical to spend a tremendous amount of time and money on data analysis and computations only to find that those expenses were larger than the actual savings. To that end, a power meter that can provide the following functions can make the M&V process more expedient and efficient:
1. Present demand and energy fluctuation graphs showing hourly energy production and consumption
2. Measure and present equipment output in terms of voltage and frequency changes
3. Measure the amount of electricity purchased from and sold to the utility company


♦ A Solution in the HIOKI PW3360 Clamp On Power Logger
The PW3360 Clamp On Power Logger is a compact, 3-phase 4-wire energy logger utilizing clamp sensor input to accurately and safely measure power on single-phase to three-phase lines. The illustration below shows how 2 power loggers can provide the information necessary to aid in the M&V process:
1. Measure between the distribution panel and utility meter the amount of electricity sold to the utility
company and purchased by the customer simultaneously. The data will also enable you to confirm that the PV system is in good operating condition.
2. Compute electricity charges by specifying the unit cost (per kWh) so that the PW3360 can multiply the electricity charge unit cost by the active energy (power consumption) WP+ value.
3. Measure the output of the system’s power conditioner to display voltage and frequency changes in order to verify correct operation of relays.
4. Use the demand and energy fluctuation graphs to verify operation of the PV system in real time and make equipment adjustments where necessary to continuously optimize the system.


♦ Advanced Energy Analysis
For more advanced surveys of power quality, we recommend the HIOKI PQ3198 or the PQ3100.


♦ Products Used
• Clamp On Power Logger PW3360-21 (English model, main unit only, with harmonics analysis function)
• Clamp On Sensor 9661 (AC 500A)
• SD Memory Card Z4001 (2GB)
• Carrying Case C1005
• Power Logger Viewer (PC application software) SF1001
• Power Quality Analyzer PQ3198 (main unit only, PC application software included)
• Power Quality Analyzer PQ3100 (main unit only, PC application software included)


♦ Download Product Catalogs Here

Catalog: CLAMP ON POWER LOGGER PW3360 Download PDF [5MB] English
Catalog: POWER QUALITY ANALYZER PQ3198, PQ3100 Download PDF  [3MB] English


♦ For Full Application Note, Please Fill In Your Details Below And Check Your Mailbox

* indicates required

09 Jan 2020 : Hioki Launches the Battery Cell Voltage Generator SS7081-50

Hioki Launches the Battery Cell Voltage Generator SS7081-50

Easily and Accurately Evaluate Battery Management 
Systems Used with Lithium-Ion Battery Packs. 

Instrument Simulates Batteries so Users can Efficiently 
Build Testing Environments


Hioki is happy to announce the launch of the Battery Cell Voltage Generator SS7081-50 in March 2020.


The SS7081-50 is a 12-channel generator and measuring instrument that can easily and accurately evaluate the performance of battery management systems (BMSs) used in lithium-ion battery packs1 found in electric vehicles (xEVs) and storage batteries (energy storage systems [ESSs] and uninterruptible power systems [UPSs]).


As a simulated battery and voltage generator, the device facilitates performance and safety evaluation by making it possible to efficiently build an environment for testing parameters that would be difficult to reproduce with actual batteries, power supplies, or electronic loads.


In addition, the instrument provides high-precision voltage and current measurement capability so that researchers and developers can evaluate increasingly sophisticated BMS functionality.


Illustration of an LIB with a BMS board



The transition to electric powertrains for vehicles is accelerating worldwide against the backdrop of resource constraints and environmental problems. Demand for LIB packs is growing along with the EV market, and R&D programs targeting associated technologies are accelerating.


LIB packs incorporate a system board known as a BMS that monitors and optimally controls the battery. Failure of a BMS to properly monitor its battery will lower the product’s efficiency and prevent it from making full use of the battery’s capacity, for example by allowing excessive discharging to degrade the battery or by preventing adequate charging. Control by BMS boards is particularly important because excessive discharge of LIBs poses serious hazards such as fire and electric shock.


Against this backdrop, development of sophisticated BMS boards that can efficiently and safely control batteries is set to increase in the future, and this trend will likely drive up demand for the ability to easily and accurately evaluate those boards.



  1. Ability to efficiently build a testing environment by simulating batteries

The ST7081-50 can be used in place of an actual battery, power supply, or electronic load as a simulated battery/voltage generator and simulator.


BMS boards are connected to battery cells, whose capacity and other parameters they monitor. Battery cells exhibit individual differences in capacity due to differences in the operating environment and to manufacturing variations. Differences in capacity prevent adequate charging, making it impossible to take full advantage of the battery. BMS boards address this issue by eliminating variability when individual cells exhibit imbalances in terms of capacity.


Difficulty arises when evaluating the performance of those systems because it is difficult to create the desired state of imbalance with actual batteries.  Because it lets the user set or simulate cell conditions as desired using a computer application, the SS7081-50 makes it possible to build a BMS test environment efficiently and easily.


In addition, each SS7081-50 unit offers 12 channels. Multiple units, each capable of simulating 12 cells, can be connected together to create a multi-cell environment. This capability eliminates the cost of preparing numerous power supplies and electronic loads as well as the time that would be required to wire them together and fabricate large systems capable of controlling them.


  1. High-precision voltage and current measurement capability and support for measurement of minuscule currents

The SS7081-50 delivers high-precision voltage (±0.1% rdg. ±100 μV) and current (±0.07% rdg. ±100 μA) measurement capabilities to make possible more accurate evaluation of increasingly sophisticated BMS boards.


It also provides a 100 μA (0.1 mA) minuscule current range that is ideal for measuring dark current2 and standby current3. BMS boards draw their power from connected battery cells. It is important to ascertain BMS dark current and standby current in order to limit battery power consumption. The SS7081-50’s minuscule current range can make these measurements with a high degree of precision.


  1. Easy and safe simulation of wire breaks

The SS7081-50 can simulate wire breaks in the cable that connects the BMS to its battery. Use of actual batteries to evaluate BMS boards poses difficulties such as the need to fabricate specially designed test rigs and safety issues.


With the SS7081-50, you can easily and safely simulate wire breaks that would be difficult to replicate with an actual battery, making it possible to evaluate the target BMS board’s anomaly detection functionality. The SS7081-50 offers extensive functionality for simulating other defects so that users can evaluate safety from a variety of standpoints.



BMS research and development

Evaluation of BMS performance during shipping inspections


1 Lithium-ion battery packs are assembled batteries in which multiple cells are connected together.

2 Dark current refers to the current consumed while the BMS is powered off.

3 Standby current refers to the current consumed when the BMS is powered on but not operating.


Download Preview Catalogue here: Battery Cell Voltage Generator SS7081-50

26 Dec 2019 : Industry Outlook 2020 – Interview with Hioki Singapore Pte Ltd Managing Director, Seiichi Miyazawa

Asia’s leading automation publication, Industrial Automation Asia has recently conducted an interview with Mr. Seiichi Miyazawa, Managing Director of Hioki Singapore Pte. Ltd.

In this annual market outlook, the magazine finds out from executives on what they have in store for 2020 and their thoughts about the trends and opportunities in the manufacturing automation industry in the region and around the globe. Below is an adaptation of the article:

What is the next big thing coming down the line for the industry whether it’s a technology or market trend?

I trust so many things going to be automated and to moving towards the internet of Things – ie: all the utilities around our everyday lives, development, production, measurement, inspection, etc. I believe, at the same time, investments and developments for high-efficiency utilisation of energies can be so much accelerated because they are basis of our social infrastructures. Most of industry sectors should follow to this big stream, and then it is obvious that companies offering unique/high-level innovation based on their higher creativity can be the next worldwide leaders in such stream.

Where do you see opportunities for growth in 2020?

With the aforementioned stream, high-efficiency of social infrastructures and its stable supplies can bring us much more demands about various measurements and signal-sensing (like current, voltage, or so). Also, new measurement technologies for both rising of battery demands and progresses of components required for faster IoT spreading will be our growth opportunities.

What should companies be mindful of to stay ahead in the industry?

We are required to monitor markets with broader field of view – from on-site activities to development teams.  On the other hand, it is important for the whole HIOKI Group to make very best efforts to be an excellent solution provider who can provide customers ideal services which are able to offer them improvements.

Do you see a need to shift your strategies in order to facilitate growth, and/or be relevant in the industry?

We are required to strengthen our organisational strengths. It means that we should have capabilities to contact to possible customers rapidly/surely as well as to provide higher-level measurement solutions fitted to those customers.

To realise those, it is required for us to improve both our own capabilities and our internal education/training systems. As the results, HIOKI can obtain market demands which can be linked with our next-generation measurement technology developments.

What do you hope to see in 2020?

We should create markets which can be brought by new values of ours. That is why I would like to accelerate rapidly to broaden HIOKI brand in ASEAN/Oceania markets. Through these activities, I believe our measurement solutions can contribute to technology innovation in our society as well as in realising sustainable development goals.

This article first appeared in https://www.iaasiaonline.com/industry-outlook-2020/




24 Dec 2019 : Hioki IR4056-21 For Insulation Resistance Testing

What Is Insulation Resistance? 

Wires and cables are electrically conductive materials.  The external layer surrounding the wires, however, is made of insulating material that prevents accidental touching of other conductive material and protects them from environment threats [1]. This non-conductive insulating material has a high resistance value which enables only very low-value current to flow. Figure 1.0 shows a typical cable assembly with the conductive and insulation parts.

Figure 1.0 Parts in a typical cable assembly

Insulation Resistance Testing

The insulating material of wires and cables degrades with time, leading to decrement in its electrical resistivity [2]. This result in electrical leakages which poses a hazard to personnel safety and could damage equipment.  Hence insulation resistance testing is needed to identify any insulation deterioration before any untoward incidents occur. Figure 2.0 identifies some of the common factors that lead to insulation degradation.

Figure 2.0 Insulation Degradation Factors [3]

An insulation resistance tester detects the current leakages during the insulation resistance testing. The tester applies a known high DC voltage on the measurement target, which results in a current flow around the surface of the insulation. This current is measured and the equivalent resistance, expressed in megohms (MΩ), is automatically calculated and displayed. The resistance value is then compared with a pre-determined baseline value to determine its validity. Figure 3.0 illustrates a general set-up for insulation resistance testing using an insulation resistance tester.

Figure 3.0 Typical Insulation Resistance Testing Set Up

Hioki IR4056-21 For Insulation Resistance Testing

Hioki IR4056-21 is a value-for-money product to cater to customers’ need for a versatile insulation resistance tester. A competitive price accompanies the following advantages to assist a speedy and accurate insulation resistance testing.


All of the above IR4056-21 features allow users to execute safe and quick insulation resistance testing. The audio and visual result indication based on a pre-set value enhances user experience and error-proof the testing result. Among the insulation resistance testers available in the market within the same price range, Hioki IR4056-21 offers more advantageous multi-features compared to others, making it a value-for-money choice tester for users.



  1. https://www.performancewire.com/insulated-wire-protection/
  2. https://carelabz.com/learn-how-insulation-resistance-test-done/
  3. https://www.industrial-electronics.com/epemt_1f.html


10 Dec 2019 : Hioki Launches Memory HiLogger LR8450/LR8450-01

330-Channel Portable Logger Delivers 1 Ms Sampling, Even Over Wireless Connections, Available with Your Choice of Plug-In and Wireless Units

December 10, 2019 – Nagano, Japan

Hioki is pleased to announce the launch of the Memory HiLogger LR8450 and LR8450-01.

The LR8450, LR8450-01 and wired units are scheduled for international release on February 28, 2020, while the Wireless Units  are scheduled for international release on May 27, 2020.

The LR8450 is a portable logger capable of measuring multiple channels of strain*1 and voltage data. The LR8450 (standard model) and LR8450-01 (wireless LAN model) both boast a maximum sampling speed of 1 ms (1/1000 s), the fastest of any Hioki logger. Customers can choose from a selection of measurement units, including the Voltage/Temp Unit and the Strain Unit, according to their application. A single LR8450-01 can host up to 11 plug-in and wireless units to measure as many as 330 channels*2.

Customers in the automotive and environment/alternative energy sectors, both of which Hioki has identified as priority markets, have embraced the legacy Memory HiLogger LR8400 series (max. 10 ms sampling), which can measure a large number of channels despite its compact size, and the popular Wireless Logging Station LR8410 (max. 100 ms sampling), which separates data measurement (by units) and collection (by the instrument).

Common themes appearing in feedback from LR8400 and LR8410 users included a desire to measure large numbers of channels more quickly in development of products such as electric vehicles (EVs), to measure strain on vehicle chassis and batteries along with temperature, and to reduce wiring man-hours and measurement issues by capturing strain data wirelessly.

1. Sample a Large Number of Wired and Wireless Channels at Up to 1 ms
Customers need measurement solutions that are capable of accommodating abrupt changes in load in the development of electric vehicles such as EVs, hybrids (HVs), and plug-in hybrids (PHVs).  By using the High Speed Voltage Unit U8553, a 5-channel plug-in unit that can measure voltage at a sampling rate of 1 ms, customers can capture such rapid changes.

The LR8450 series is ideal for capturing output data from sensors that measure low-frequency (from 10 to several dozens of hertz) data such as resin pressure or vibration, which are difficult to measure at conventional sampling speeds. The Wireless High Speed Voltage Unit LR8533, a 5-channel wireless unit, can measure voltage at a sampling rate of 1 ms. This sampling rate is 100 times faster than the LR8410 Wireless Logging Station.

2. A Single Solution for Dynamic Strain Measurement
The Strain Unit U8554 (a plug-in unit) and the Wireless Strain Unit LR8534 (a wireless unit) are also capable of sampling data at up to 1 ms, making them useful in testing strain on vehicle chassis and brakes.

Strain gauges*3 are extremely thin, and their wires are prone to break when positioning them far from the host instrument. Wireless measurement allows wire lengths to be minimized so that wiring man-hours can be reduced and measurement issues such as wire breaks avoided.  Moreover, conventional products require an external component known as a bridge box in order to measure strain. The LR8450 has a built-in bridge box despite its compact size, allowing strain gauges to be connected directly to its measurement units. Strain gauge-type converters can also be connected to measure quantities such as pressure and acceleration.

3. Add Wired or Wireless Channels as You Need Them

Both the LR8450 (standard model) and the LR8450-01 (wireless LAN model) can accept a mix of up to four plug-in units. Since you can combine units with different sampling speeds, you can simultaneously observe fast voltage fluctuations and slow temperature changes.

The LR8450-01 can also connect to seven wireless units. Combined with its four slots for plug-in units, that means you can pair up to 11 units, allowing one LR8450-01 to measure as many as 330 channels.   You can choose whether to use wireless connectivity for measurements as conditions dictate.

• Testing of automobiles, farm and construction machinery, and electric devices
• Embedding in preventive maintenance systems for production equipment and evaluation equipment at manufacturing plants

Memory HiLogger  LR8450 (standard model)
Memory HiLogger  LR8450-01 (wireless LAN model)
Voltage/Temp Unit U8550 (15 channels, plug-in)
Wireless Voltage/Temp Unit LR8530 (15 channels, wireless)
*Example units shown (a total of five plug-in and five wireless units are available).
*Hioki plans to launch all wireless units in 2020.

*1 Strain: The ratio of the change in the form of elongation and contraction that occurs in an object when a force is applied. The minuscule change in electrical resistance caused by strain is detected and measured using a strain gauge.
*2 If four Voltage/Temp Unit U8552 (30 channels, plug-in) units and seven Wireless Voltage/Temp Unit LR8532 (30 channels, wireless) units are connected, the LR8450-01 can measure 330 channels of voltage and temperature data at a maximum sampling rate of 20 ms.
*3 Strain gauge: A sensor for measuring strain.

Download Catalog: Memory HiLogger LR8450/LR8450-01