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  • Q01Trouble
    I am connecting the acceleration sensor "M-A352AD10" and the vibration sensor "M-A342VD10" to a PC via the evaluation board "M-G32EV041". I am unable to obtain data using the evaluation software "Vibration Logger". Please advise what to do.
  • Answer
    If you are unable to obtain data, you will need to determine whether the problem is with the sensor itself, or with the connection to the PC or the settings.

    Please check the appropriate solution for your situation below.

    1. If the red LED on the evaluation board "M-G32EV041" is not lit

    If the LED on the evaluation board is not lit, it means that power is not being supplied to the sensor. Please check the connection as follows.

    1-1 Check the operating environment
    We cannot guarantee operation outside of the recommended environment.
    Please check the operating environment. For details, see here.

    1-2. Check the connection between the evaluation board and the sensor
    Please make sure that the evaluation board and the sensor are connected correctly.

    1.3. Check the type of USB cable
    Please use a Type A to C data communication cable.
    Type C to C cables cannot be used.

    1-4. Check the USB cable
    The USB cable is suspected to be damaged or broken.
    Please replace the USB cable and try connecting again.

    2. If the red LED on the evaluation board "M-G32EV041" is on, but the "Find" button on the "Vibration Logger" is on red

    This state indicates a problem with the PC settings or the "Vibration Logger" settings. Please check the following.

    2-1. Check the type of USB cable
    Use a Type A to C data communication cable.
    Type A to C charging cables cannot be used.

    2-2. Check the USB driver
    Select "Ports (COM & LPT)" in "Device Manager" in the Control Panel and check that the COM port is recognized. If the FTDI USB driver is not installed, the COM port will not be recognized. Please install it using the following method in accordance with the company's terms of use.

    1. 1) Access the FTDI website (https://ftdichip.com/drivers/vcp-drivers/ ) and download the "setup executable" from the "Currently Supported VCP Drivers" list in the "comments" column of "Windows (Desktop)".
    2. 2) Run the downloaded file and install the USB driver. Also, refer to the FTDI Installation Guides (https://ftdichip.com/document/installation-guides/) if necessary.

    2-3. Check the COM port
    The PC's COM port may not be available.
    Try connecting to a different COM port.

    2-4. Check running applications
    There may be a COM port conflict. If "Vibration Logger" and terminal software, etc. select the same COM port, it will not work properly. Close the COM port of the terminal software, etc. before using "Vibration Logger".

    2-5. Check the serial communication port
    If the baud rate of the PC and the sensor do not match, "Vibration Logger" will not work properly.
    Check the baud rate from "Serial Port Config" in the "Tool" menu of "Vibration Logger". For the baud rate setting, refer to "3.4 Setting the Serial Port" in the "Vibration Logger User Guide".

    2-6. Check the Ignore Serial Port setting
    Check the Ignore Serial Port setting from "Serial Port Config" in the "Tool" menu.
    COM ports set to Ignore Serial Port cannot be used. Press the "delete" button to delete the target COM port from the Ignore Serial Port setting.

    3. If you cannot measure even after checking the above

    3-1. Restart your PC
    Your PC system may be unstable.
    Restart your PC and try measuring again.

    3-2. Check on another PC
    If you have multiple PCs, try measuring on another PC.

    3-3. Reinstall "Vibration Logger"
    "Vibration Logger" may not be installed correctly or may not be configured correctly.
    Try reinstalling it.
    *Before reinstalling, be sure to uninstall (delete) "Vibration Logger" and then reinstall it. To uninstall, select "Vibration Logger" from "Programs and Features" in the Control Panel and uninstall it. "

  • Q02Setup
    I am connecting the accelerometer "M-A352AD10" and the vibration sensor "M-A342VD10" to my PC via the evaluation board "M-G32EV041." Is it okay to use a USB extension cable when connecting them with a USB cable?
  • Answer
    Regardless of whether you are using the evaluation board "M-G32EV041" or not, USB extension cables may degrade communication quality, so caution is required. (so, please be careful.)
    When extending the cable, we recommend using a USB active repeater cable or USB extender that has a built-in function to prevent signal degradation.
  • Q03Setup
    I am connecting the accelerometer "M-A352AD10" and the vibration sensor "M-A342VD10" to a PC via the evaluation board "M-G32EV041." Is it okay to use a USB hub when connecting with a USB cable?
    Also, please tell me the precautions to take when using a USB hub.
  • Answer
    USB hubs can be used.
    Not only when using the evaluation board "M-G32EV041" but when (However, whether or not the evaluation board "M-G32EV041" is used, if)multiple sensors are connected to a bus-powered USB hub, there is a possibility that communication will not be possible due to insufficient power. We recommend using a self-powered USB hub.
    In addition, do not cascade USB hubs.
  • Q04Trouble
    When I start the evaluation software "Vibration Logger", a pop-up message appears saying "LabVIEW Run-Time Engine not found."
  • Answer
    "Vibration Logger" may not have been installed correctly. Please try reinstalling it.
    *Before reinstalling, be sure to uninstall (delete) "Vibration Logger". To uninstall, select "Vibration Logger" from "Programs and Features" in the Control Panel and perform the uninstallation.
  • Q05Trouble
    When I click the Find" button on the evaluation software "Vibration Logger", it just blinks yellow and doesn't work properly.What could be the cause?"
  • Answer
    There may be a communication error between the sensor and the PC. To restart the sensor, unplug and replug the USB cable connected to the sensor.
  • Q06Trouble
    Even if I click the "START" button on the evaluation software "Vibration Logger", no graph is displayed. What could be the cause?"
  • Answer
    There may be a communication error between the sensor and the PC. Please close and restart "Vibration Logger". Also, to restart the sensor, please unplug and replug the USB cable connected to the sensor."
  • Q07Setup
    Is there the manual regarding connecting the acceleration sensors "M-A352AD10" and "M-A552AR10" and the vibration sensors "M-A342VD10" and "M-A542VR10" to a PC or MCU board?
  • Answer
    The manual on connection is available. Please download the "A542A342_A552A352_QuickConnectionGuide_DeviceConnection" In addition to the connection method, it also lists the equipment required for connection, points to note when designing the connection board, and points to note when installing the sensor. In addition,the"A542A342_QuickConnectionGuide_DataCommunication" is also available for the "M-A342VD10" and "M-A542VR-10". This also lists the steps up to measurement, as well as basic control commands and register specifications.
  • Q08Function / Characteristics
    What is the resolution when measuring tilt angle using the accelerometer "M-A352AD10" and "M-A552AR10" ?
  • Answer
    The calculation resolution is 0.002 µrad/LSB (≒1.15×10^(-7)°/LSB), and the measurable range is ±1.0472 rad (≒±60°).
    In the actual measurement environment, the actual resolution is lower than the calculation resolution due to the effects of environmental vibration and temperature changes. This actual resolution depends on the environment in which it is used, so we recommend that you check whether the desired tilt change can be detected in the environment in which it is used.
    We have a track record of detecting tilt changes of approximately 17 µrad (≒0.001°) while controlling environmental vibration and temperature changes.
  • Q09Function / Characteristics
    What is the resolution when measuring acceleration using the accelerometer "M-A352AD10" and "M-A552AR10" ?
  • Answer
    The calculation resolution is 0.06 µG/LSB, and the measurable range is ±15G.
    Note that the resolution" and "minimum detectable acceleration" of our accelerometer are different. The minimum detectable acceleration has the characteristic of changing depending on the frequency. For example, in the case of the M-A352AD10, it is 0.12µG/√Hz in the frequency range of 1 to 20Hz. In the case of the M-A552AR10, due to its structure, it tends to be slightly higher than this.
    Please check the "Example of main characteristics (noise density)" on the brief sheet for the minimum detectable acceleration for each frequency.
  • Q10Function / Characteristics
    Why does the output value of the vibration sensor "M-A342VD10" and "M-A542VR10" fluctuate over a long period immediately after starting measurement? Also, how long does it take for the output value to stabilize?
  • Answer
    The fluctuation that occurs immediately after the start of measurement is a transient response of the integration process.
    This transient response converges after a certain amount of time has passed. It takes 10 seconds for the vibration velocity to converge, and 60 seconds for the vibration displacement to converge.
    If fluctuations in the output value affect the evaluation, exclude the data from the section where the transient response is occurring.
  • Q11Function / Characteristics
    Why does the bias of the accelerometer "M-A352AD10" and "M-A552AR10" fluctuate immediately after starting measurement? Also, how long does it take for the bias to stabilize?
  • Answer
    When measurement begins, bias changes occur due to circuit heat generation. This change converges in Typ. 5 min if the bias stabilization function is ON, and Typ. 15 min if it is OFF. After that, it becomes stable.
    If bias stability affects the measurement, we recommend performing measurement after the bias has stabilized.
    *If measurement is started when the temperature around the sensor has changed or the sensor is exposed to wind from an air conditioner, the time it takes for the temperature inside the sensor to stabilize will change, and the convergence time will also change.
  • Q12Function / Characteristics
    What is the service life and warranty period for
    the accelerometer "M-A352AD10" and "M-A552AR10" and the vibration sensor "M-A342VD10" and "M-A542VR10" ?
  • Answer
    We guarantee an MTBF of 87,600 hours (10 years).
    *MTBF stands for Mean Time Between Failure.
  • Q13Function / Characteristics
    What is the shock resistance of the accelerometer "M-A352AD10" and "M-A552AR10" and the vibration sensor "M-A342VD10" and "M-A542VR10" ?
  • Answer
    Both have a shock resistance of 1000G (action time 0.2ms half-sine).
  • Q14Function / Characteristics
    How do the velocity and displacement of the vibration sensor "M-A342VD10" and "M-A542VR10" be calculated?
  • Answer
    The detection element of the vibration sensor detects acceleration. This acceleration value is integrated once inside to convert it into vibration velocity, and integrated twice to convert it into vibration displacement, which is then output.
  • Q15Function / Characteristics
    What is the output rate of the vibration sensor "M-A342VD10" and "M-A542VR10" ?
  • Answer
    The output rate for vibration velocity mode is 3000sps, and for vibration displacement mode it is 300sps.
  • Q16Function / Characteristics
    What is the output rate of the accelerometer "M-A352AD10" and "M-A552AR10" ?
  • Answer
    Output rates can be selected from 1000, 500, 200, 100, and 50 sps.
  • Q17Function / Characteristics
    What can the accelerometer "M-A352AD10" and "M-A552AR10" and the vibration sensor "M-A342VD10" and "M-A542VR10" measure?
  • Answer
    The accelerometer is a sensor that can measure acceleration and inclination.
    In contrast, the vibration sensor is a sensor that measures vibration velocity and vibration displacement. In addition, The vibration sensor are sensors that comply with ISO10816.
  • Q18Setup
    Please tell me how to install the accelerometer "M-A552AR10" and the vibration sensor "M-A542VR10" if it is difficult to secure them with the screws.
  • Answer
    By using the optional evaluation tool magnetic base "M-A52EV161", it can be installed using a magnet.
  • Q19Setup
    Is the magnetic base "M-A52EV161" insulated from the object being measured?
  • Answer
    It is insulated.
  • Q20Setup
    What precautions should I take when mounting the accelerometer "M-A552AR10" and the vibration sensor "M-A542VR10" to the magnetic base "M-A52EV161" ?
  • Answer
    When installing, tighten the bolts and nuts to a torque of 1.5 Nm.
    If the bolts and nuts are tightened too much, the insulating coating on the surface of the magnet base may be scraped off, causing electrical conductivity. In addition, repeated tightening may cause the insulation to peel off.
    We recommend that you use the appropriate tightening torque.
  • Q21Setup
    What precautions should I take when installing the magnetic base "M-A52EV161" ?
  • Answer
    The magnetic force of the magnet is very strong, so there is a risk of accidentally subjecting the sensor to strong shocks. Install the sensor carefully to avoid shocks.
  • Q22Function / Characteristics
    What precautions should I take when using the self-test?
  • Answer
    Perform a self-test after turning on or initializing the power supply and before starting a measurement.
    If you perform a self-test after a measurement, it may not run correctly in rare cases.
    In that case, perform a software reset and then perform the self-test.
  • Q23Function / Characteristics
    What type of filter is built into the accelerometer "M-A352AD10" and "M-A552AR10" ?
  • Answer
    The accelerometer has two main types of filters built in.
    1. FIR filter
    1.1 FIR Kaiser filter: A selectable filter.
    1.2 User-defined filter: Use this if you want to adjust the filter yourself.
    2. Long-period filter (HPF, LPF): A moving average filter for long-period measurements, separate from the FIR filter.
  • Q24Function / Characteristics
    How do I set the FIR filter built into the accelerometer "M-A352AD10" and "M-A552AR10" ?
  • Answer
    If the frequency of the measurement target is unknown, the widest bandwidth is used: Sampling frequency = 1000sps, TAP512, fc = 460Hz
    If you know the frequency of the measurement target, set the appropriate sampling frequency and cutoff frequency.
    For details, refer to "Notes on FIR filters" in the data sheet. If you would like a data sheet, please request it from Contact Form.
  • Q25Function / Characteristics
    Is there any delay when using the accelerometer "M-A352AD10" and "M-A552AR10" to measure? If so, how much delay is there?
  • Answer
    Because the accelerometer uses an FIR filter, a certain amount of delay occurs due to the filter processing.
    This delay amount varies depending on the number of taps in the filter, and is 63.875ms at 512 taps, 15.845ms at 128 taps, and 7.875ms at 64 taps. The delay amount can be calculated as group delay amount = (number of taps - 1)/2*0.250µs.
  • Q26Function / Characteristics
    Is there any aliasing effect when measuring with the accelerometer "M-A352AD10" and "M-A552AR10" ?
  • Answer
    When measuring with the accelerometer's internal timer, only sampling frequencies and filter settings that suppress aliasing by -60dB or more can be applied.
    When using a user-defined filter or external trigger, set the cutoff frequency to 1/2 the sampling frequency or less.
  • Q27Function / Characteristics
    Can I customize the FIR filter for the accelerometer "M-A352AD10" and "M-A552AR10" ?
  • Answer
    The accelerometer is equipped with a "user-defined FIR filter" that allows the customer to set the filter coefficients as desired.
    Please refer to "User-defined FIR filter" in the data sheet for the setting method. If you would like a data sheet, please request it from Contact Form.
  • Q28Function / Characteristics
    What is the purpose and setting method of the long period filter (HPF, LPF) of the accelerometer "M-A352AD10" and "M-A552AR10" ?
  • Answer
    The long-period filter is a moving average filter for long-period measurements.
    Use this when you want to apply a long-period filter in addition to the FIR filter.
    For instructions on how to set up a long-period filter, see Long-period Filters (HPF, LPF)" on the data sheet. If you would like a data sheet, please request it from Contact Form.
  • Q29Function / Characteristics
    Can multiple the accelerometer "M-A352AD10" be used for synchronous measurement?
  • Answer
    The accelerometer M-A352AD10" can control the measurement timing externally by using the external trigger input function.
    Please refer to "External Trigger Input" on the data sheet for the setting method.
    In addition, since it does not have a time synchronization function, please synchronize the time and trigger on your system if necessary. If you would like a data sheet, please request it from Contact Form.
  • Q30Function / Characteristics
    Can multiple the accelerometer "M-A552AR10" be used for synchronous measurement?
  • Answer
    The accelerometer "M-A552AR10" does not have an external trigger input function, so synchronous measurement is not possible.
  • Q31Function / Characteristics
    Noise floor conditions for the accelerometer "M-A352AD10" and "M-A552AR10"
    Please tell me how to use "Standard Noise floor condition" and "Reduced Noise floor condition".
  • Answer
    The accelerometer has two types of noise floor conditions, which can be switched between.
    The factory setting is "Standard Noise floor condition".
    If you want to capture even smaller vibrations at frequencies of 3Hz or higher, set it to "Reduced Noise floor condition". It is not effective for vibrations below 3Hz.
    Please note that the "Reduced noise floor condition" consumes more current during measurement than the "Standard noise floor condition".
    For setting instructions, see "Low noise floor measurement" in the data sheet. If you would like a data sheet, please request it from Contact Form.

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