14 November 2018 : Hioki Wireless Mini Logger LR8512 For Engine Load Testing

Engine Load Testing And Its Importance
Engines, particularly diesel ones, are expensive and known to have a long lifespan. Engines are built to run within an environment and load limit. However, the improper operation conditions often kill the engines prematurely. Overload is one of the top three common reasons [1]. An overloaded engine cannot reach its rated Revolutions per Minute (RPM) under a full load of fuel and water tanks capacity [2]. Continued operation of an overloaded engine leads to excessive black smoke emission during cruising, high exhaust temperature beyond manufacturer’s specification, excessive fuel consumption, slow acceleration, reduced engine life, and exhaust flow components failure.

Engine RPM As Engine Load Test Parameter
Engine RPM denotes the number of times the engine crankshaft rotates around its axis and translates to the torque or power produced. The piston movements during engine cylinder combustion drive the crankshaft’s rotational motion [3]. In engine commissioning test, the RPM test is one of the tests to ensure that the end user complies with the engine build specifications. The engine RPM measurement involves the measurement of the crankshaft gear’s rotational speed. This gear contains a fixed number of teeth (Figure 1.0).

Figure 1.0 Crankshaft gear with fixed teeth

Conventional Engine RPM Measurement Methods
There are two conventional methods of measuring RPM [4] before proximity sensors’ introduction:

i) Tachometers with mechanical sensors (contact on rotating body to be
measured) or optical sensors (infrared light/ laser beam). The measured RPM
is displayed either on a calibrated analog dial or digital display. A common
drawback for this method is that it requires space for instrument mounting and thus does not suit engine mounted at constraint spaces.

ii) Stroboscopic using intense flash that strobes at high frequency. The measured rotating object will appear to be stationary when the frequency of the light synchronized with the RPM of the object. It takes multiple adjustments to get the synchronized frequency and requires manual logging of the result.

Hioki LR8512 Pulse Logger For Engine RPM Testing
Hioki LR8512 pulse logger is convertible to be used for engine RPM measurement. It can be used independently for this sole purpose or paired with LR8410 central logger together with other logging modules for simultaneous measurement of various parameters (e.g. DC voltages and temperature) with RPM measurement. This feature is particularly useful
during engine commissioning where engine RPM and other parameters measurement are required. The LR8512 logger connection cable connects the logger to the magnetic or electrical pickup transducer that is mounted close to the engine gear area (Figure 2.0). The pickup transducer will return a signal when a gear teeth passes by the location the transducer [5].

Figure 2.0 Example of LR8512 probe set up for engine rpm testing

One complete rotation through all the teeth on the gear signifies one revolution. This number of teeth needs to be keyed into the logger as reference and can be done wirelessly (via Bluetooth) using LR8410 as shown in Figure 3.0 with an example of a gear with 97 teeth.

Figure 3.0 LR8512 gear teeth setting (viewed on LR8410)

The LR8512 reports RPM in r/sec (Figure 4.0). Users can also report in other units using the ‘Scaling’ function. Example for reporting in r/min unit set the scaling ratio value to ‘60’ and the unit to ‘r/min’ (Figure 5.0).

Hioki LR8512 is suitable for real-time engine rpm monitoring with the following key features:
• Compact size to fit constraint spaces such as engine bays
• Bluetooth wireless data sending for real-time monitoring (accessible thru
Android smart devices installed with free ‘Wireless Logger Collector’ app within 30m line-of-sight)
• Stand-alone use or pair with LR8410 together with other data loggers
(up to 7 modules) for simultaneous measurement of various parameters
(Multiple loggers data are combined automatically in a single csv file for user’s
convenience)
• 2 channels for 2 locations simultaneous tracking
• 500,000 data points per channel

Summary
Aside from the small size, the Hioki LR8512 mini logger’s easy set up features for engine rpm testing makes it an ideal tool for this purpose. The remote monitoring feature enables real-time monitoring and automated data retrieval of test data. Engine RPM testing is particularly useful for engines commissioning for warranty coverage by engine manufacturers.

References
1.https://mvdirona.com/TechnicalArticles/DieselEngineOverload/AvoidingDieselEngineOverload.htm
2. http://www.scottmarinepower.com/techtips/2015/9/24/full-power-engine-speed-readings-proper-engine-loading-aka-wide-open-throttle
3. http://knowhow.napaonline.com/understanding-engine-rpm-basics/
4. https://test.electronicsforu.com/rpm-measurement-sensors-techniques/
5. http://eblogbd.com/types-of-speed-sensor-and-their-comparison/

25 October 2018 : Understanding Memory HiCorders

While Memory Recorders don’t have sampling speeds that are as fast as those of digital oscilloscopes, these waveform recorders can be used to record various types of signals without worrying about potential differences between them and without using isolation amplifiers.

01. What is a Memory HiCorder?

Basic principle of Memory HiCorders

Typical waveform recording instruments have included the oscilloscope, electromagnetic oscillograph, and pen oscillograph (a category that includes pen recorders). With progress in digital technology, analog oscilloscopes gave way to digital oscilloscopes, while electromagnetic oscillographs and pen oscillographs gave way to memory-based recorders (transient recorders).
The Memory HiCorder is such a memory-based recorder. Figure 1-1 illustrates the basic architecture used by Memory HiCorders, which consist of A/D converters, data memory, a waveform display, and a printer along with a CPU that controls them. The A/D converters function to convert input analog signals into digital signals, which are then stored in the instrument’s memory and displayed or printed as waveforms.

Comparison with analog recorders

This section explains why analog pen oscillographs (pen recorders) and electromagnetic oscillographs were replaced by Memory HiCorders.

Pen oscillographs are self-balancing recorders with servomotors that operate in proportion to the amplitude of input signals to move pens and thereby record signal data. They have a response speed on the order of dozens of hertz, but their use of mechanical means to represent amplitude imposes limits on that speed, and ink-type variants require regular maintenance.

Electromagnetic oscillographs use high-sensitivity reflecting elements that are deflected according to the amplitude of the input signals in order to reflect light from a light source onto photosensitive recording paper. This method of measurement is capable of attaining high-speed recording with paper feed speeds of up to 200 centimeters per second (5 ms/cm) and response speeds on the order of several kilohertz, but it suffers from difficulties in the form of the high running costs associated with the photosensitive paper (resulting from the instrument’s high speed) and handling of the reflecting elements.

Memory HiCorders incorporate a thermal dot array printer (with a high resolution of 8 dots per millimeter) for printing recorded data, and this design offers high reliability due to the absence of moving parts such as pens. The instruments generally offer high response speeds, with sampling speeds of up to 20 MS/s (50 ns). They also combine extensive trigger functionality with low running costs, since users can retrieve only that waveform data which is necessary. Despite enhanced functionality and performance, the instruments have fallen in price, and for these reasons they have displaced electromagnetic oscillographs and pen recorders.

Memory HiCorder part names and functions

Memory HiCorders provide a color LCD for displaying waveforms and a printer for printing them. Both the display and printer can generate output in real time for certain signal loads. (Data acquired at a sampling speed of at least 10 kS/s is displayed on the screen in real time.)

With a maximum sampling speed of 20 MS/s, Memory HiCorders are slower than digital oscilloscopes, but they are characterized by the ability to accept input of numerous signals without use of isolation amplifiers or concern for potential differences between signals.

Recorded data can be stored on the instrument’s built-in SSD, a CF card, or a USB flash drive.

Each input unit generally provides two channels of input, and the instrument can accommodate input of up to 1000 V DC (700 V AC) as well as dynamic strain, thermocouple, logic, and other input simply by switching input units.

By connecting the instrument to a computer via its USB or LAN interface, users can transfer data and control the instrument remotely.

Memory HiCorder applications (Difference from digital oscilloscopes and data loggers)

Currently available recording and waveform observation instruments can be broadly divided into three categories: oscilloscopes in the high-speed segment of the market, Memory HiCorders in the medium- and low-speed segment of the market, and data loggers in the low-speed segment of the market. Customers choose instruments based on the frequency of the signal waveform being measured and recording interval, or based on characteristics such as input signal voltages, if the circuit being measured has a different ground potential.

While digital oscilloscopes excel in their ability to observe high-speed phenomena, their use of a common ground for all channels introduces the risk of shorts between circuits and ground faults when measuring circuits that are at different potentials relative to ground or when measuring targets such as mechatronic control circuits that mix strong and weak currents.

Since Memory HiCorders use isolated channels, they are able to perform tasks such as measuring DC control signals while observing a commercial power supply’s AC waveform or recording waveforms between inverter or converter inputs and outputs. As a result, they shine in applications involving measurement of circuits mixing strong and weak currents, as mentioned above.

Thanks to improvements in sampling speeds, Memory HiCorders have frequency characteristics that exceed the audible frequency range, and as discussed above, an extensive range of input units gives them capabilities ranging from electrical measurement to measurement of mechanical and vibration physical properties. Figure 1-6 illustrates the frequency bands for signal waveforms and compatible waveform measuring instruments in a variety of fields.

02. What is the Difference Between a Digital Oscilloscope and a Memory HiCorder?

No need for isolation amplifiers

The biggest difference between Memory HiCorders and digital oscilloscopes lies in isolation of input channels from one another and from the instrument.

A Memory HiCorder’s input channels are all electrically isolated. In a digital oscilloscope or A/D board, one side of each input channel is connected to the ground.

Digital oscilloscopes are well suited to use in applications where it is necessary to observe multiple signals that share the same ground, for example in measuring the electrical signals on a circuit board. However, if it were used to simultaneously measure the input and output sides of a power conversion device (such as a converter or inverter) like that shown in Figure 2-1, a digital oscilloscope would experience an internal short-circuit.

Memory HiCorders are extremely useful in applications such as this where a large number of signals at different potentials must be measured.

The only way to use a digital oscilloscope in such applications is to place an isolation amplifier between each signal and the instrument.

Difference of resolution and accuracy

Most digital oscilloscopes have a resolution of 8 bits (yielding 256 points). For example, if using a ±10 V range, that means the smallest interval that can be detected by the instrument is 0.078 V (obtained by dividing the full span of 20 V by 256 points).

Most Memory HiCorders have a resolution of 12 bits (yielding 4,096 points), enabling them to read values at an interval of 0.0048 V under the same conditions. A Memory HiCorder with a resolution of 24 bits would be able to read values at an interval of 0.000001192 V.

Memory HiCorders also offer superior accuracy. Whereas a typical digital oscilloscope provides accuracy of ±1% f.s. to ±3% f.s., Memory HiCorders deliver accuracy of ±0.01% rdg. and ±0.0025% f.s. to ±0.5% f.s.

This level of resolution and accuracy makes it possible to observe output from mechanical displacement, vibration, and other sensor types at a higher level of detail.

More channels and support for a larger variety of signals

Whereas typical digital oscilloscopes have 4 input channels, Memory HiCorders can accommodate from 2 to 54 channels of input, depending on the model.

In addition, different input units can be used, enabling Memory HiCorders to accept a larger variety of signals.

Available input units include analog units that can accept 1000 V DC (600 V AC) voltage input; units that can be connected to thermocouples, strain gauges, and acceleration pickups; and units that can be connected to high-precision current sensors.

Other units go beyond signal input to enable signal output with function generator and arbitrary waveform generation functionality.

Memory HiCorders shine in the field of mechatronics, where they deliver functionality that lies beyond the capabilities of digital oscilloscopes, for example in mixed recording of voltage and current waveforms and control signals for motors, inverters, and converters and in recording gasoline engine strain and ignition waveforms.

03. Basic Measurement Functions of a Memory Hicorder

Memory HiCorder basic measurement functions

Each Memory HiCorder provides enough functionality to be used as a number of different types of measuring instrument.

■ Memory recorder function
The instrument can record high-speed transients and sudden phenomena whose timing is unknown. It can also perform a variety of waveform calculations.

■ Recorder function
Although the instrument can be used as a real-time recorder or normal recorder, its extremely fast response speed, which is on the order of several microseconds, also enables it to record the amplitude of phenomena such as noise, even at low speed settings.

■ RMS recorder function
The instrument can record RMS voltage levels of current input without an RMS converter, and it can record fluctuations in supply voltage.

■ XY Memory・XY Recorder Function
The instrument can be used as an X-Y recorder for data from multiple X-T (time axis) recorded channels, with a user-specified channel as the axis.

■ Recorder&Memory Function
Recorder functionality can be used to record long-term fluctuations, and memory recorder functionality can be used to record sudden phenomena.

■ FFT Function
The instrument can analyze the frequency components of phenomena such as vibrations using its frequency analysis function.

■ Logic Recording Function
In addition to analog input, the instrument can record logic. Mixed digital/analog recording makes it possible to measure characteristics such as sequence timing.

04. The Power of Triggers

Trigger function and trigger types

The trigger function plays an important role in configuring a Memory HiCorder. When recording high-speed transients, this functionality makes it easy to start and stop measurement based on complex patterns that would be impossible for a human operator to duplicate manually.

The following introduces some Memory HiCorder trigger functions.

Figure 4-1 illustrates the types of trigger sources supported by Memory HiCorders. With the exception of manual triggers, triggers are activated based on AND/OR conditions between sources. Triggers can also be activated based on AND/OR conditions between analog channels and between logic channels.

■ Level Trigger
The level trigger is activated when the input voltage either rises above or falls below a set trigger level. A trigger filter can be set to keep the trigger from being activated by noise or other phenomena.

■ In-Window Trigger
Triggering occurs when the signal enters (IN) the defined upper and lower threshold range.

■ Out-of-Window Trigger
Triggering occurs when the signal exits (OUT) the defined upper and lower threshold range.

■ Voltage dip Trigger
Phenomena such as momentary voltage dips and power outages can be detected using a trigger designed specifically for use with commercial power supplies (50/60 Hz). The user sets a peak value (or an RMS value), and the trigger is activated if input falls beneath that level.

■ Period Trigger
Triggers can be activated when the period is outside of the specified time width, based on frequency variation and so on.

■ RMS Trigger
Triggers can be activated based on RMS levels.

■ Logic Trigger
Triggers can be activated according to signal input on logic channels.

■ Timer Trigger
Triggering occurs at the specified interval from the specified Start time until the Stop time.

Start  ‘00-1-1 0:00
Stop   ‘00-1-2 0:00
Ineterval   1:00

■ External Trigger
The external trigger is activated based on an external signal. The trigger is activated using a no-voltage contact signal or a 5 to 0 V signal. The external trigger has two inputs and outputs so that trigger output can be connected to another Memory HiCorder to enable simultaneous trigger operation.

■ Manual Trigger
Triggers can be activated by pressing the manual trigger key.

Trigger mode

Select from the below setting modes whether to record one recording length per trigger event, or to record continuously.

■ Single mode
Only one trigger activation is accepted by the instrument. When the trigger activates once, the waveform is recorded for the set recording length, and then measurement stops.

■ Repeat mode
Repeated trigger activations are accepted by the instrument. When no trigger has been activated, the instrument enters the trigger standby state.

■ Auto mode
Repeated trigger activations are accepted by the instrument. If no trigger is activated after approximately 1 s, the instrument automatically records the waveform for the recording length.

Trigger start point (Pre-trigger)

The user sets the trigger point as a percentage, using the recording start point for the set recording length as 0% and the recording stop point as 100%. By setting this pre-trigger, it is possible to review conditions before the trigger (malfunction or anomaly) occurred.

05. How to Use Memory HiCorders・Setting Examples

Example applications in different industrial fields

1. Electrical and power-related
•    Power supply analysis (momentary power outages, momentary voltage dips, power supply noise, harmonic analysis)
•    Analysis of problems with electrical control systems
•    Analysis of the characteristics of breakers and magnetic circuit interrupters
•    Detection of short-circuits and ground fault circuits
•    Generator and load dump testing
•    Battery charge/discharge testing
•    Servomotor and feedback system analysis
•    Analysis of magnetic card playback signals
•    Analysis of inverter input and output

2. Automotive, rail, and transport
•    Automobile and engine control testing
Engine combustion analysis, ECU signal analysis, ABS testing, suspension testing, navigation system testing, airbag testing, 4WD testing, transmission testing, vibration testing while the vehicle is driven, sensor signal analysis, etc.
•    Train car control testing
Element control testing, inverter motor control testing, train operation control testing, etc.; brake characteristics and vibration analysis, etc.

3. Manufacturing and machinery
•    Control analysis in steelmaking, chemical, and other types of industrial plants
Analysis of instrumentation signals, analysis of solenoid valve and control system malfunctions
•    Plant equipment maintenance, motor and bearing vibration analysis
•    Hydraulic equipment pressure testing
•    Analysis of characteristic vibration frequencies of various types of equipment and machinery
•    Analysis of control systems for injection molding machines
•    Diagnosis of malfunctions affecting rotating equipment
•    Measurement of welding currents
•    Analysis of malfunctions affecting automated equipment

4. Maintenance
•    Elevator acceleration testing and analysis of electrical control malfunctions
•    Analysis of rotating equipment

5. Other
•    Material testing (compression, tension, load, vibration, and impact testing, etc.)
•    Medical (recording of electrical activity of the heart, measurement in combination with various types of medical equipment)
•    Construction and civil engineering (vibration and impact testing; analysis of characteristic vibration frequencies of various objects)
Chemical (explosive testing of gunpowder and pressure analysis)

Example: Measuring the input and output characteristics of DC power supply

Objective:
To measure the rising time in output after the power supply switch is activated

Key considerations:
A level trigger should be activated at the rising edge of the primary input when the power switch is turned on.

1)    Setting recording length
Since we want to capture data for about 2 s, set the shot length (recording length) to 20 div. at 100 ms/div.

2)    Setting input range
Since the primary side of the circuit is 100 V AC, which yields a P-P value of 282 V, set channel 1 to 100 V/div. Since the secondary side is 5 V DC, set channel 2 to 1 V/div.

3)    Making trigger setting
Since the voltage will change from 0 to 100 V (RMS) when the switch is turned on, set the trigger level to a rising slope that is greater than 0 V. This explanation will use a setting of 10 V.

4)    Setting the trigger start point (Pre-trigger)
Since we want data after the switch is turned on, use a pre-trigger setting of 10%.

5)    Selecting trigger mode
Since we need only one measurement, use single mode.

6)    Data printing setting
If you wish the instrument to print data automatically when the trigger activates, turn on automatic printing on the status (settings) screen. If you wish to automatically save data in external memory, select the type of media and select the data format (binary or text). If you capture data on the screen even though automatic printing is off, you can record or print it later using the PRINT key, so turn this setting off.

7)    Setting [Waiting for pre-trigger]
Check the input cord connections and press the START key. If the display indicates that the instrument is in the trigger standby state, it has been set up properly.

8)    Recording
Turn on the power supply switch. If the instrument has been configured correctly, measurement will end once acquisition of the waveform data is complete.

Example: Measuring the input and output characteristics of DC power supply 2

Objective:
To measure the fall time in output after the power supply switch is activated

Key considerations:
Configure a trigger so that it is activated by the falling edge of the AC power supply. Since the level trigger would not be activated for channel 1, use either a voltage drop trigger with peak value detection or set up a trigger to activate at the falling edge of the DC output voltage level. If you have a line-use logic probe, you can also set up a trigger to activate when the input logic level switches from 1 to 0. This explanation will focus on the measurement procedure when using a voltage drop trigger. Once you understand how to use this voltage drop trigger, you will be able to measure momentary outages and momentary voltage drops affecting AC power supplies.

■ Measurement using a voltage drop trigger
1) Setting recording length
Select the voltage drop trigger for channel 1 and set it to 5 V.

2) Setting input range
Since the primary side of the circuit is 100 V AC, which yields a P-P value of 282 V, set channel 1 to 100 V/div. Since the secondary side is 5 V DC, set channel 2 to 1 V/div.

3) Setting display positions
Set the 0 positions to around 60% and 10% so that channels 1 and 2 do not overlap. (The positions can be changed later after data has been acquired if the channel displays overlap, so it’s fine if they do.)

4) Making trigger setting
Select the voltage drop trigger for channel 1 and set it to 5 V.

5) Setting the trigger start point (Pre-trigger)
Since we want data after the switch is turned on, use a pre-trigger setting of 10%.

6) Selecting trigger mode
Since we need only one measurement, use single mode.

7) Data printing setting
(Same setting as example of “Measuring the input and output characteristics of DC power supply”)

8) Setting [Waiting for pre-trigger]
Check the input cord connections and press the START key. If the display indicates that the instrument is in the trigger standby state, it has been set up properly.

9) Recording
Turn off the power supply switch. If the instrument has been configured correctly, measurement will end once acquisition of the waveform data is complete.
*Same as Figure 5-1

■ Measurement using a line-use logic probe
Change the trigger condition settings and the logic channel display settings. Other settings are the same as described above.

1) Making trigger setting
Since the trigger will be activated based on logic input, set up a logic trigger. Using channel A1 [0.x.x.x] 4, set up the trigger so that it activates when channel A1 changes from 1 to 0.

2) Displaying logic channel
Display the logic channel A1 on the channel display screen.

3) The remaining settings are the same as those that were described in the previous section.

If you encounter a self-hold circuit such as a sequence control circuit that exhibits the issue of resetting when this approach is applied, you can analyze the issue, for example in the power supply circuit, by setting up a trigger to activate depending on whether or not the self-hold circuit has a voltage.

Example: Measuring starting current waveforms of motors

Objective:
Although instruments such as normal ammeters cannot be used to measure quantities such as instantaneous load current fluctuations or starting current, a Memory HiCorder can easily do so using waveform levels when utilized in combination with a clamp current sensor.

Key considerations:
Use a clamp current sensor and set up a trigger so that it is activated by the starting current. Use the scaling function so that current values can be read directly. Use a Hioki 9018 Clamp On Probe. The output rate will be 500 A AC  200 mV AC. You can also display trace cursors, use them to measure the maximum value and rush current time, and then use the parameter calculation function to calculate the maximum value.

1) Setting recording length
The recording length varies with the load, but here we will use a setting of 10 div. at 50 ms/div. to capture 0.5 s.

2) Setting input range
Since the clamp current sensor we’re using generates 200 mV AC output, set the 0 position to 50% using the 50 mV/div. range.

3) Making scaling settings
Select 2-point scaling on the system’s scaling settings screen and configure the settings as shown in Figure 5-12. Since use of the ENG setting in combination with scaling enables settings in units of 103 and 106, you can read values as indicative of units with a K, M, or G prefix.

Voltage  Voltage values at 2-points
HIGH side 0.2000E+00 → 5.0000E+02  [A]
LOW side  0.0000E+00 → 0.0000E+00

4) Setting the trigger start point (Pre-trigger)
Since we need data after the trigger is activated, use a setting of 10%.

5) to 8) (Sama as “Measuring the input and output characteristics of DC power supply”)

6) Maximum value calculation
Set parameter calculation to “ON” on the status (settings) screen and specify a calculation for channel 1 only. Since data remains, moving the flashing cursor to the parameter calculation “ON” setting will cause an “EXECUTE” button to be displayed on the function key GUI display. Press that button. The maximum value calculation result will be displayed on the screen.

17 October 2018 : How To Use Hioki Insulation Testers

How to use Hioki insulation testers

Components of an insulation tester

The figure below illustrates the name of each part of the Hioki Insulation Tester IR4057. Full List Of Hioki Insulation Testers , click here:  Hioki Insulation Testers

Insulation resistance measurement

Warning: Do not attempt to measure insulation resistance on a live conductor.

・    Verify that the MEASURE key is not in the raised position ([1] in figure on the right).
・    Consult the table and determine the measurement voltage to which to set the rotary switch ([2] in figure on the right).
・    Connect the black test lead to the ground side of the object being measured. [3]
・    Connect the red test lead to the line to be measured. [4]
・    Press the MEASURE key. [5]
・    Read the value after the inductor has stabilized. [6]

*This list provides an overview of how to use insulation testers. Please consult the user manual for your product to ensure safe and proper use.
*Please note that values in the table apply to testing in Japan.

Discharging function

To properly discharge, be sure to perform as shown below after the measurement.

・    Without removing the test leads from the item being measured, release the MEASURE key.
・    The built-in discharge circuit automatically discharges the item.
・    The discharge will end when the “discharge mark” on the right side of the display disappears.

*This list provides an overview of how to use insulation testers. Please consult the user manual for your product to ensure safe and proper use.
*Please note that values in the table apply to testing in Japan.

“Product List” of the insulation testers, please refer to here.

Voltage measurement

Notes: Test leads should only be connected to the secondary side of a breaker.
Never press the MEASURE key while measuring voltage.

・    Use the rotary selector to select the V function.
・    Connect the black test lead to the ground side of the object being measured.
・    Connect the red test lead to the line side of the breaker.
・    Read the value after the indicator has stabilized.

*This list provides an overview of how to use insulation testers based on the Hioki Model IR4057. Please consult the user manual for your product to ensure safe and proper use.
*Please note that values in the table apply to testing in Japan.

Resistance measurement

Before measurement, perform zero adjustment to cancel the test leads’ wiring resistance and other potentially problematic quantities.

・    Set the rotary selector to the Ω function.
・    Short circuit the tip of the test lead.
・    Pull up the MEASURE key.
・    Turn off the MEASURE key to hold the measured value.
・    Press the “0Ω ADJ” key.
・    Connect the test lead to the ground side of the object being measured
・    Press MEASURE key and read the displayed value.
・    Turn off the MEASURE key after using.
The figure is an example of checking the continuity of ground wiring.

*This list provides an overview of how to use insulation testers based on the Hioki Model IR4057. Please consult the user manual for your product to ensure safe and proper use.
*Please note that values in the table apply to testing in Japan.

PVΩ measurement (Insulation Tester IR4053 only)

PVΩ measurement is used to measure insulation resistance between a solar panel and ground. The PVΩ measurement allows accurate resistance measurements without the effect from power generation.

・    Turn OFF the main switch to the connection box to be discontinued from the power conditioner.
・    Turn OFF all disconnect switches used for strings.
・    Check that MEASURE key has been turned OFF. [1]
・    Set the rotary switch to “PVΩ”.
・    Press the PVΩ 500V⇔1000V key and set the voltage to 500 V or 1000 V. [3]
・    Press the “500V/1000V RELEASE” key to release the lock. [4]
・    Connect the black test lead to the ground terminal. [5]
・    Connect the red test lead to terminal P of the string. [6]
・    Press the MEASURE key. [7]
・    A resistance will be indicated after approximately four seconds. [8]
・    Turn OFF the MEASURE key. [9]
・    If there is no deteriorated insulation performance found with terminal P measurement, connect the red test lead to the terminal N of the string to measurements by procedures from [7] through [9].

*This list provides an overview of how to use insulation testers based on the Hioki Model IR4053. Please consult the user manual for your product to ensure safe and proper use.
*Please note that values in the table apply to testing in Japan.

11 October 2018 : Four Hioki Products Including the Memory HiCorder MR6000 Win 2018 Good Design Awards

Hioki is pleased to announce that the Memory HiCorder MR6000Power Analyzer PW3390AC/DC Current Sensor CT6904, and Lux Meter FT3425, all of which it manufactures and sells, have been recognized with the 2018 Good Design Award by the Japan Institute of Design Promotion. Below are summaries of the features of these four award-winning products.

Memory HiCorder MR6000
This flagship model offers the most measurement capacity of any Memory HiCorder ever introduced along with high-speed measurement at 200 MS/sec. (10 times faster than legacy models), and high-speed real-time saving of data that is 32 times faster than earlier generation devices. Direct, intuitive operation using a capacitive touch panel combines with higher-speed sampling and faster data processing to improve work efficiency.

Power Analyzer PW3390
In addition to support for performance testing under the new WLTP mode fuel efficiency standard, the PW3390 provides high-accuracy power analysis with basic accuracy of ±0.09%, placing it in the top tier of its category in the industry and exceeding the performance of its predecessor (the 3390). In addition to a measurement frequency band that has been expanded to 200 kHz, the instrument features a new phase shift function. The product is poised to make a significant contribution to the development, production, maintenance, and management of electric devices in the fields of energy conservation and alternative energy.

AC/DC Current Sensor CT6904
This current sensor delivers both a world-class measurement band (4 MHz, or 40 times that of the legacy model) and high accuracy, making it ideal for use in applications such as the evaluation of next-generation inverters, which operate on increasingly large currents and at increasingly high frequencies.

Lux Meter FT3425
The world’s first illuminance meter to offer Bluetooth® communications, the FT3425 can transfer measured values to a smartphone or tablet via GENNECT Cross, an app developed by Hioki. This capability has allowed users to halve the amount of time they spend making measurements, recording readings, and creating reports. Furthermore, an optional extension cart helps reduce the physical workload on technicians.

The Good Design Award program has been comprehensively evaluating product designs and recommending them to consumers for more than 50 years. Since receiving its first Good Design Award in 1985, Hioki has won the accolade 73 times (including two Long-life Design Awards). Hioki’s approach to product design seeks to pinpoint how customers feel when they hold and use its products in an effort to enrich their lives and society as a whole. These awards recognize both products’ improved performance and the benefits that stem from their designs.

Memory HiCorder MR6000

 AC/DC Current Sensor CT6904

 Power Analyzer PW3390

 Lux Meter FT3425

Judges offered the following remarks concerning the products recognized this year:

Memory HiCorder MR6000
“Hioki has fine-tuned the design to transform it from a product that is used in maintenance in the field to one that can also be used in development, and in doing so it has looked toward development of technology for improving the energy efficiency of inverters and power conditioners as those devices continue to evolve. Although Hioki’s goal is to eke out every possible gain in measurement precision, enhancements such as sensitivity to the effects of minuscule changes, use of isolated channels, excellent portability, support for measurement over extended periods of time with features like an angled monitor and touch panel, and an interface capable of displaying multiple phenomena at once reflect the demands of both researchers and industrial customers, earning the product high marks.”

Power Analyzer PW3390
“Accurate power measurement plays an essential role in the development of technology for increasing the energy efficiency of inverters and power conditioners as those devices continue to evolve, and one can envision such instruments being used in a variety of settings and conditions. I was highly impressed with how well Hioki has made the instrument smaller, supported conversion cables and sensors, and designed an innovative power supply to accommodate use in a simply remarkable array of settings, all while maintaining the world-class level of measurement precision that it has achieved over the line’s many years of history.”

AC/DC Current Sensor CT6904
“Recent growth in the market for electric vehicles is boosting demand for current sensors that support large currents and high frequencies. I was impressed with the instrument’s world-class measurement accuracy and a level of performance that makes possible the world’s broadest measurement band. The product incorporates a variety of technical innovations and features that are designed to increase precision, including a compact design that reduces the distance between the sensor and the conductor under measurement, enhancements that reject noise, and a measurement band that is 40 times that of the previous model. By delivering such a demanding level of measurement accuracy, the CT6904 contributes to development, which is to say, to energy conservation. The design exhibits a comprehensive scope that accommodates the needs of users in the field through technological capability, a well-designed form factor, and innovative features.”

Lux Meter FT3425
“The product offers wireless capability and an auxiliary cart to solve issues with illuminance measurement work in buildings, namely the surprising inefficiency of such work and the sheer magnitude of repetition that it entails. As a result, work that previously required two people can be accomplished by one as reports become easier to create; mistakes, less frequent; and the process as a whole, faster. This revolutionary product introduces the first system of its kind in the world to reduce worker and time requirements while boosting efficiency for nighttime work that must be performed in a harsh environment over a limited timeframe that is measured in days.”

5 October 2018 : Hioki Memory HiCorder MR6000 Now Supported by FlexPro Data Analysis Software

Hioki is pleased to announce that its flagship memory waveform recorder, MR6000 Memory HiCorder, is now compatible with FlexPro, a powerful software package for analysis and presentation of scientific and technical data, developed by Weisang GmbH.  Earlier generations and sister models of the MR6000 have already been supported by FlexPro  – with the addition of the MR6000, Memory HiCorder users are now afforded even greater analytic capabilities with their measurement data.

In recent years, demand for multi-channel testing has significantly increased due to ever more complex equipment and the inter-dependence of signals.  This also results in huge data files that can be difficult to manage.  With FlexPro, measurement data can be managed systematically, analyzed using fast Fourier transform (FFT) processing and other methods, and presented as a report in smooth, easy steps.

Customers in the automotive, aeronautics, railway and other advanced industries use FlexPro extensively in their production, research and development efforts to analyze mission-critical measurement data.  Those who use Hioki Memory HiCorders to capture that data can now enjoy the advantages of FlexPro in order to improve data management efficiency and increase their analytical capabilities.

Compatible version (MR6000):  FlexPro 2017 (v11.0.15 or later)
Compatible Hioki Memory HiCorders: MR8875 Series, MR8847 Series, MR8847A Series,  MR8827MR8740MR8741MR6000 Series
Supported Memory HiCorder data format:  .MEM

More information:  https://www.weisang.com/en/flexpro/

Data from other legacy Hioki Memory HiCorders is also supported by FlexPro.  See complete list here.

 

5 October 2018 : Hioki Bundles Battery Tester BT3554 with Pin Type Lead L2020

New Additions to the BT3554 Lineup Delivers Greater Convenience and Efficiency

Hioki is pleased to announce availability of the Battery Tester BT3554-10 and BT3554-11 (with Bluetooth® wireless communication), which bundle the two versions of the Battery Tester BT3554 with the Pin Type Lead L2020, a testing probe with an L-shaped tip.

The BT3554 and its predecessor 3554 Battery HiTester have been widely recognized and utilized worldwide for their ability to easily diagnose the performance degradation of lead-acid batteries, including those used for uninterruptible power supplies, or UPS, letting customers know when the battery should be replaced in order to prevent power-dependent mission critical equipment from failing to operate.

In recent years, demand for greater implementation efficiency in UPS systems has called for the need to minimize the vertical distance between UPS racks, which in turn severely limits the accessibility of the battery terminals during testing. The BT3554 comes standard with a straight-tipped pin-type lead, but that design can be difficult to use in certain applications as it may not fit between equipment racks. To make possible measurement under such conditions, Hioki launched the Pin Type Lead L2020, which has an L-shaped tip, alongside the BT3554 in July 2016.

Reach deeply located terminals with L2020 L-shaped probe

Until now, the L2020 has been available only as an option that had to be ordered separately from the BT3554 instrument. Hioki’s decision to start shipping the tester with the L2020 as a standard accessory reflects growing demand for the lead.

We are confident that having more choices will help streamline purchasing decisions and asset management at the customer site.

Another update to the entire series will be the addition of a new removable rubber protector in our distinctive Hioki blue. In addition to providing a more ergonomic grip, the new holster will deliver added strength and protection to the battery tester.

Both BT3554-10 and BT3554-11 will be launched on 1st November 2018 and the price information will be released on 22nd October 2018. Register your interest now and be the first to know the price : http://www.hioki.com.sg/register-your-interest/

※The Bluetooth® word mark is registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by HIOKI E.E. CORPORATION is under license

1 October 2018 : Recorder Encoder Pulse Output to Verify Motor Operation

Use the MR6000 to capture an encoder’s A- and B-phase pulse output waveforms via high-speed sampling.

How are Rotary Encoders Used and Their Operation Verified?

Encoders are frequently used to monitor motor parameters such as speed, rate and rotational direction by converting rotary motion into a digital signal and then viewing the waveforms on data acquisition equipment. This is especially important when installing an encoder for the first time to verify that it is working properly and that its output matches the specifications of the motor, or when troubleshooting motor issues. By monitoring the two phases that are connected to the encoder, you can confirm duty cycle as well as a proper phase relationship between phases A and B.

Why is High-speed Sampling Important?

Oftentimes a high-resolution recorder that can sample quick motor changes is indispensable, especially when feedback from the encoder is necessary to ensure absolute synchronization of the motor with connected equipment. Let’s take, for example, a 3000 rpm motor, which is equal to 50 rotations per second. If you’d like to monitor the encoder’s rotation with 1° of resolution, the encoder would need to output 360 pulses per rotation. One second of a 3000rpm motor would translate to 18,000 pulses, resulting in a per pulse width of 55μsec. To capture such a narrow pulse cycle, you would need a recorder that can sample at 1MS/sec. Motor movement that requires even more precise control, such as those used for medical equipment or advanced robotics, may need to be monitored at an even higher resolutions of 0.1°, or even 1/100 of a degree, resulting in a narrower pulse that would require a sampling speed of 10MS, 50MS or 100MS/s.

A Comprehensive Solution

The Memory HiCorder MR6000 and High Speed Analog Unit U8976 present a comprehensive solution by delivering high-speed isolated measurement of up to 200MS/s across multiple channels, enabling you to definitively capture minute anomalies in encoder pulses over long observation periods, signals that could be missed if you use a general oscilloscope due to the latter’s short recording time. Simultaneous multi-channel testing lets you monitor multiple encoders at the same time, as well as conduct other electrical tests, to verify the ability of the encoders to properly trace the operation of the motors, and quickly and effectively analyze issues when they occur.

Additional Convenient Features

Use the MR6000’s Concierge function after measurement to easily search for waveforms that differ from a reference wave in order to quickly identify pulse anomalies or gaps that could be attributed to a faulty encoder, incorrect installation, or to shorted wires, loose couplings, or other system related issues.

Products used:

• MEMORY HiCORDER MR6000
*Application requires dedicated options such as an input unit. Choose equipment based on how many channels of data you need to capture.
• HIGH SPEED ANALOG UNIT U8976
• 10:1PROBE 9665

 

1 October 2018 : Hioki FT3432 Sound Level Meter For Noise Pollution Monitoring

Noise Pollution

Noise is unwanted sound [1] and measured in decibel (dB) unit. Noise pollution
happens when a regular noise at high dB unit is present and is harmful to humans or animals. A few sources of environmental noise pollution are listed in the photo above.

Effects of Noise Pollution

The most profound effect of noise pollution is auditory problems such as temporary or permanent hearing loss and tinnitus [3]. Emotional balance is also affected, leading to high blood pressure, headaches and heart failure.

There’s also economic impact as seen in the lawsuit case of some 5000 residents living around a Tokyo military base; they received USD22 million compensation over the annoyance and blood pressure irregularity suffered due to the noise pollution [4]. Eco-system imbalance also occurs as animals living near the sources of noise pollution that relies heavily on sound for hunting and protection loses their hearing capability as the noises drowned these sounds [5]. Hence it’s vital to monitor areas with potential loud noise generation such as construction sites and high traffic volume areas (cities, airports, train stations) to protect both humans and animals.

Hioki FT3432 for Noise Monitoring

Hioki’s FT3432 Sound Level Meter measures a wide range of sound from 30dB to 137dB and requires no range switching. This meter is highly portable with a compact- size weight of only 105g. Measurement capabilities include:
• Sound level
• Equivalent continuous sound level
• Sound exposure level
• Maximum sound level
• C-weighted peak sound level (*Only when peak range is selected)

There are 2 methods to use Hioki’s FT3432 for noise / sound recording and
monitoring as listed below. Both methods generate csv output files for reporting purpose.

1. Hioki FT3432 with the LR5042 Voltage Logger for scaled output (dB) recording with real-time noise monitoring.

This combo allows the scaled readings (dB) display on the LR5042 for real-time monitoring. The recording starts and stops time are controlled manually or automatically via the scheduled mode (configurable via PC). Output files can be viewed via LR5000 Utility software on PC in following formats:

2. Hioki FT3432 with the CM4372 Clamp Meter for DC output (V) with wireless
data transfer capability

Measured data on FT3432 is transferred wirelessly to smart devices via Bluetooth. The data is viewed via GENNECT Cross app (freeware) or transferred in csv file format for editing in xls.

There are two reporting formats option – csv (editable in xls ) and Hioki Connect Format ( via GENNECT Cross app ). A simple scaling calculation is required to get the readings in dB unit (Please consult our representatives for the details)

Noise pollution needs close monitoring especially with the urbanization of various areas. The above mentioned two methods of using Hioki’s FT3432 Sound Level Meter enables easy recording and reporting of noise pollution.

References
1. https://infrastructure.planninginspectorate.gov.uk/document/2322958
2. https://www.environmentalpollutioncenters.org/noise-pollution/
3. https://www.nidcd.nih.gov/health/noise-induced-hearing-loss
4. https://blog.arcadiapower.com/15-facts-stats-noise-pollution/
5. https://greentumble.com/how-noise-pollution-is-disrupting-the-ecosystem/