Larson Davis HVM200 Manual DRAFT IHVM200.
Copyright Copyright 2015 PCB Piezotronics, Inc. This manual is copyrighted, with all rights reserved. The manual may not be copied in whole or in part for any use without prior written consent of PCB Piezotronics, Inc. Trademarks PCB® is a registered trademark of PCB Group, Inc. Apple Store is a trademark of Apple, Inc. Google Play is a trademark of Google, Inc. All other trademarks are property of their respective owners.
CHAPTER 1 Introduction This chapter presents an overview of the HVM200 Human Vibration Meter. Features The Larson Davis HVM200 Human Vibration Meter is a Type 1 instrument designed for use in assessing vibration as perceived by human beings.
Optional Larson Davis CCS047 Hard Shell Case • Larson Davis CCS048 Arm Band for wearing the HVM200 • Larson Davis SEN041F accelerometer for Hand-Arm vibration measurements • Larson Davis SEN020 accelerometer for Hand-Arm and general vibration measurements • Larson Davis SEN027 Seat Adapter, accelerometer, and adapter for whole-body vibration measurements • Larson Davis ADP063, ADP080A, ADP081A, and ADP082A adapters for accelerometer placement • Larson Davis CBL210-05, CBL216, and CBL217-01 cable
The HVM200 could also be utilized through an alternative direct input. This would require, however, the use of some kind of external signal conditioning unit such as an external source of ICP power, or an external charge amplifier. • Charge mode sensors output a high impedance, electrical charge signal that is generated by the piezoelectric sensing element. This signal is extremely sensitive to corruption from environmental influences.
frequency response tables and graphs in this manual for more information on the HVM200 frequency response. Environmental Effects Consider temperature, humidity, and other physical agents, such as mounting surface, mounting method, mass, and environment. The mass of the accelerometer should ideally be no more that 1/50 of the mass of the object being measured.
CHAPTER 2 Getting Started This chapter provides instructions for setting up and configuring HVM200 meters for use with the G4App. Unpacking the HVM200 The HVM200 package includes a USB to mirco-USB cable with the meter. After removing the HVM200 and cable from the packaging, record the serial number and date of purchase in a safe place where it can be retrieved, in case you require customer support.
Step 4 Connect one end of the supplied cable to the HVM200 micro-USB port and the other end to a powered USB port. The Power LED displays a yellow color while charging. If the LED does not show any color, push the power button in for a few seconds. Power LED Status LED Power Button Micro-USB port FIGURE 2-2 HVM200 Micro-USB Port Refer to the back label of your HVM200 for a description of each LED indication. Step 5 Make sure the HVM200 is fully charged before performing any operations.
Connecting to a Wi-Fi Network To establish a Wi-Fi connection with the HVM200 meter, follow these steps: Step 1 Launch the HVM App. Step 2 Click the menu icon, as shown in Figure 2-3. Menu Icon FIGURE 2-3 HVM200 App Step 3 On the HVM200 Menu, select Setup Wi-Fi.
Step 4 If you have already entered a password and a stored network appears, select it and click Connect Network. If no stored networks appear in the Networks dialog box, select an available network and click Add Network. Click the up or down arrow to raise or lower the priority of the network connection. Higher numerical values establish higher priority in connection sequence. Secure network requires password.
Connecting the Accelerometer Refer to the "Introduction" in this manual for information on selecting the proper accelerometer for the HVM200 meter. To connect the accelerometer to your HVM200 meter, follow these steps: Step 1 Insert the accelerometer cable into the 4-pin connector on the HVM200 and then screw it tight. Step 2 Insert the other end of the accelerometer cable into the 4-pin connector on the accelerometer and then screw it tight.
Sensor information, including model, serial number, and sensitivity specifications are usually listed on the calibration certificate that comes with an accelerometer. FIGURE 2-8 Sensor List Identification and Sensitivity If you are using an accelerometer with TEDS capabilities, sensor information will appear automatically in this list. In the Sensor List, type the model, serial number of your accelerometer, and the sensitivity for the x, y, and z axes and then click Add.
CHAPTER 3 Making a Measurement This chapter provides an example procedure for performing a vibration measurement with the HVM200 meter and the HVM200 App. Overview The following example demonstrates procedures for measuring vibration, including: • Setting Up the Measurement • Making the Measurement • Downloading the Measurement Data Setting Up the Measurement To set up the measurement: 1. 2. Perform a calibration check. Specify a setup file on your mobile device.
Default Setup Application 60secLog ComfortBack ComfortFeet ComfortRot ComfortSeat Hand-Arm HealthSeat WmBuilding Table 3-1 HVM200 Default Setups You can also create new setup files on the Settings list. To create a new setup file, follow these steps: Name the Setup File The easiest way to create a new setup file is to modify an existing default setup and save it with a different name. Step 1 Right-click on a default setup file in the Settings list. Select Save As and specify the setup name.
FIGURE 3-2 Select New Setup File Set Operating Mode, Interval Time, and Weighting The interval time values represent the span that data is collected, averaged, and stored before starting a new sample. The Slow option is an exponential detector, meaning that each 1 second average computation includes all previous data in the measurement.
Set Measurement Schedule Step 4 If needed, schedule the HVM200 to take a measurement automatically by selecting the Enable Schedule option on the Schedule tab. Specify the Start Date and Start Time, as well as the End Date and Duration. Specify a Delay Start, if needed. Click Save.
The exposure settings show default values according to the EU Physical Agents Directive (2002/44/EC) but can be modified according to differing standards or needs. FIGURE 3-5 Misc. Settings Choose Tools Settings If you are connected to multiple meters, the HVM200 App displays a Tools tab for each meter, according to their numbered order. Single integration calculations convert acceleration values into velocity values; double integration converts acceleration values into displacement values.
FIGURE 3-6 Tools Settings The HVM200 multiplies the specified k-Factor by the instantaneous acceleration for each axis to produce the summation ( value on the HVM200 App. Verify Sensor Settings If you are using an accelerometer with TEDS capability, the Sensor tab settings are automatically specified. If your accelerometer does not have TEDS capability and you have not already specified the settings, refer to the section "Transducer Selection".
Refer to the seciton "Transducer Selection" for more information. Step 3 Connect the accelerometer to the HVM200. Step 4 Attach the accelerometer to an appropriate adapter. Position for Whole Body Vibration with Seat Adapter For whole body vibration measurements using the Larson Davis SEN027 Seat Adapter, follow these steps: The Seat Adapter is sold with the SEN027 accelerometer already housed within the adapter and with the cable already connected to the accelerometer.
• Y-axis • Z-axis To advance from one data display to the next, click the Next Arrow. To enlarge a data display, click the Zoom button. The Overall display shows cumulative data for all three axes and their summation for the measurement. Current overall root mean square (RMS) vibration value according to specfied units.
FIGURE 3-9 Summation Data Display The Axis displays provide real-time representations of current values for each axis. X Y graphical Z FIGURE 3-10 X, Y, and Z Axis Data Displays Stop and Annotate the Measurement Click the Stop button and, if needed, click the Annotate button to provide a note to include with the measurement. Downloading the Data Once the measurement is completed, you can download data as raw data or with a third-party tool.
3-10 Downloading the Data HVM200 Manual
APPENDIX A Technical Specifications Specifications are subject to change without notice. Numerical values given are typical. Refer to specific calibration or test results for accurate data on a specific unit.
Effects of Temperature The RMS level varies 0.5 dB when the complete instrument is tested over the - 10° C to 50° C temperature range. The reference reading, for this test, is taken at 20° C and 36% relative humidity (RH); the input signal is at 79.6 Hz. Effects of Humidity The RMS level varies 0.5 dB when the complete instrument is tested over the 0% to 90% RH, noncondensing range. This test is performed at 40° C, with an input signal of 79.6 Hz.
• 2 GB file size limit. No limit to number of files or setups. • No limit to number of files or setups • 5 minute (typical) data retention for clock during battery change • Data and settings are stored in non-volatile memory Data Rate • USB 2.0 hi-speed • Data rate > 1 MBps • Wi-Fi 802.11 b/g Connections • Input: 1/4-28 4-pin male • Charging and communicaiton: Micro USB Data Communication Characteristics Need specs.
Power Usage/Storage Need specs. Swapping Limitations Device must be off while replacing Micro SD card or battery. Adaptor Resonances and Frequency Responses Need specs Reference Values Reference Acceleration The reference acceleration (for displaying data in dB) is 10-6 m/s2. the user can also select a reference of 10-5 m/s2 (see section 4-3 of the manual for an explanation of how to select the reference acceleration.
Reference Calibration Vibration The reference calibration vibration is 1 m/s2 Typical Measurement Ranges Need specs for all filters. In both mv/g and dB? Frequency Weighting Curves Fa (Flat 0.4 Hz to 100 Hz) Freq ( Hz) Nominal HVM200 Manual Freq ( Hz) True Fa dB Tolerance dB 0.100 0.1000 -24.10 +2/- 0.125 0.1259 -20.12 +2/ - 0.160 0.1585 -16.19 +2/ - 0.200 0.1995 -12.34 +2/- 0.250 0.2512 -8.71 +2/-2 0.315 0.3162 -5.51 +2/-2 0.400 0.3981 -3.05 +1/-1 0.500 0.5012 -1.
Freq ( Hz) Nominal A-6 Freq ( Hz) True Fa dB Tolerance dB 5.00 5.012 0.00 +1/-1 6.30 6.310 0.00 +1/-1 8.00 7.943 0.00 0 10.0 10.00 0.00 +1/-1 12.5 12.59 0.00 +1/-1 16.0 15.85 0.00 +1/-1 20.0 19.95 -0.01 +1/-1 25.0 25.12 -0.02 +1/-1 31.5 31.62 -0.04 +1/-1 40.0 39.81 -0.11 +1/-1 50.0 50.12 -0.27 +1/-1 63.0 63.10 -0.64 +1/-1 80.0 79.43 -1.46 +1/-1 100 100.0 -3.01 +1/-1 125 125.9 -5.46 +2/-2 160 158.5 -8.64 +2/-2 200 199.5 -12.
Fb (Flat 0.4 Hz to 1260 Hz) Frequency Weighting Freq ( Hz) Nominal HVM200 Manual Freq ( Hz) True Fb dB Tolerance dB 0.100 0.1000 -24.10 +2 / - 0.125 0.1259 -20.12 +2 / - 0.160 0.1585 -16.19 +2 / - 0.200 0.1995 -12.34 +2 / - 0.250 0.2512 -8.71 +2 / -2 0.315 0.3162 -5.51 +1 / -1 0.400 0.3981 -3.05 +1 / -1 0.500 0.5012 -1.48 +1 / -1 0.630 0.6310 -0.65 +1 / -1 0.800 0.7943 -0.27 +1 / -1 1.00 1.000 -0.11 +1 / -1 1.25 1.259 -0.04 +1 / -1 1.60 1.585 -0.
Freq ( Hz) Nominal A-8 Freq ( Hz) True Fb dB Tolerance dB 31.5 31.62 0.00 +1 / -1 40.0 39.81 0.00 +1 / -1 50.0 50.12 0.00 +1 / -1 63.0 63.10 0.00 +1 / -1 80.0 79.43 0.00 0 100 100.0 0.00 +1 / -1 125 125.9 0.00 +1 / -1 160 158.5 0.00 +1 / -1 200 199.5 0.00 +1 / -1 250 251.2 -0.01 +1 / -1 315 316.2 -0.02 +1 / -1 400 398.1 -0.04 +1 / -1 500 501.2 -0.11 +1 / -1 630 631.0 -0.27 +1 / -1 800 794.3 -0.64 +1 / -1 1000 1000 -1.
Fc (Flat 6.3 Hz to 1260 Hz), Wh, and Wf Frequency Weighting. Freq ( Hz) Nominal Freq ( Hz) True 0.800 0.7943 -36.00 -36.00 +2 / - -76.00 +4 / - 1.00 1.000 -32.00 -31.99 +2 / - -68.00 +4 / - 1.25 1.259 -28.01 -27.99 +2 / - -60.00 +4 / - 1.60 1.585 -24.02 -23.99 +2 / - -52.00 +4 / - 2.00 1.995 -20.04 -20.01 +2 / - -44.00 +4 / - 2.50 2.512 -16.11 -16.05 +2 / - -36.00 +4 / -4 3.15 3.162 -12.27 -12.18 +2 / - -28.00 +4 / -4 4.00 3.981 -8.64 -8.
Freq ( Hz) Nominal Freq ( Hz) True 250 251.2 -0.01 -23.96 +1 / -1 0.00 +1 / -1 315 316.2 -0.02 -25.98 +1 / -1 0.00 +1 / -1 400 398.1 -0.04 -28.00 +1 / -1 0.00 +1 / -1 500 501.2 -0.11 -30.07 +1 / -1 0.00 +1 / -1 630 631.0 -0.27 -32.23 +1 / -1 0.00 +1 / -2 800 794.3 -0.64 -34.60 +1 / -1 0.00 +1 / -2 1000 1000 -1.46 -37.42 +2 / -2 0.00 +1 / -2 1250 1259 -3.01 -40.97 +2 / -2 -1.70 +4 / -4 1600 1585 -5.46 -45.42 +2 / -2 -4.
Wm, Wc, and Wd Frequency Weightings Freq ( Hz) Nominal HVM200 Manual Freq ( Hz) True Wm dB Wc dB Wd dB Tolerance dB 0.100 0.100 -32.04 -24.10 -24.09 +2 / - 0.125 0.1259 -28.20 -20.12 -20.12 +2 / - 0.160 0.1585 -23.98 -16.19 -16.18 +2 / - 0.200 0.1995 -20.23 -12.34 -12.32 +2 / - 0.250 0.2512 -16.71 -8.71 -8.68 +2 / -2 0.315 0.3162 -13.51 -5.51 -5.47 +2 / -2 0.400 0.3981 -10.98 -3.05 -2.98 +1 / -1 0.500 0.5012 -9.53 -1.47 -1.37 +1 / -1 0.630 0.
Freq ( Hz) Nominal A-12 Freq ( Hz) True Wm dB Wc dB Wd dB Tolerance dB 31.5 31.62 -6.16 -11.87 -24.01 +1 / -1 40.0 39.81 -8.11 -13.97 -26.08 +1 / -1 50.0 50.12 -10.09 -16.15 -28.24 +1 / -1 63.0 63.10 -12.43 -18.55 -30.62 +1 / -1 80.0 79.43 -15.34 -21.37 -33.43 +1 / -1 100 100.0 -18.72 -24.94 -36.99 +1 / -1 125 125.9 -23.00 -29.39 -41.43 +2 / -2 160 158.5 -28.56 -34.57 -46.62 +2 / -2 200 199.5 -34.03 -40.20 -52.24 +2 / - 250 251.2 -39.69 -46.
We, Wj, and Wk Frequency Weighting Freq ( Hz) Nominal HVM200 Manual Freq ( Hz) True We dB Wj dB Wk dB Tolerance dB 0.100 0.100 -24.08 -30.18 -30.11 +2 / - 0.125 0.1259 -20.09 -26.20 -26.14 +2 / - 0.160 0.1585 -16.14 -22.27 -22.21 +2 / - 0.200 0.1995 -12.27 -18.42 -18.37 +2 / - 0.250 0.2512 -8.60 -14.79 -14.74 +2 / -2 0.315 0.3162 -5.36 -11.60 -11.55 +2 / -2 0.400 0.3981 -2.86 -9.15 -9.11 +1 / -1 0.500 0.5012 -1.27 -7.58 -7.56 +1 / -1 0.630 0.
Freq ( Hz) Nominal Freq ( Hz) True We dB Wj dB Wk dB Tolerance dB 25.0 25.12 -28.01 +0.06 -5.84 +1 / -1 31.5 31.62 -30.04 +0.00 -7.89 +1 / -1 40.0 39.81 -32.11 -0.08 -10.01 +1 / -1 50.0 50.12 -34.26 -0.25 -12.21 +1 / -1 63.0 63.10 -36.64 -0.63 -14.62 +1 / -1 80.0 79.43 -39.46 -1.45 -17.47 +1 / -1 100 100.0 -43.01 -3.01 -21.04 +1 / -1 125 125.9 -47.46 -5.45 -25.50 +2 / -2 160 158.5 -52.64 -8.64 -30.69 +2 / -2 200 199.5 -58.27 -12.26 -36.
Freq ( Hz) Nominal HVM200 Manual Freq ( Hz) True Wg dB Tolerance dB 6.30 6.31 +0.1 +1 / -1 8.00 7.94 -1.0 0 10.0 10.00 -2.5 +1 / -1 12.5 12.59 -4.2 +1 / -1 16.0 15.85 -6.3 +1 / -1 20.0 19.95 -8.2 +1 / -1 25.0 25.12 -10.1 +1 / -1 31.5 31.62 -12.1 +1 / -1 40.0 39.81 -14.2 +1 / -1 50.0 50.12 -16.3 +1 / -1 63.0 63.10 -18.7 +1 / -1 80.0 79.43 -21.
Wm (Whole Body) Frequency Weighting Freq ( Hz) Nominal A-16 Freq ( Hz) True WM dB Tolerance dB 0.100 0.100 -36.00 +2 / - 0.125 0.1259 -32.00 +2 / - 0.160 0.1585 -28.01 +2 / - 0.200 0.1995 -24.02 +2 / - 0.250 0.2512 -20.05 +2 / - 0.315 0.3162 -16.12 +2 / - 0.400 0.3981 -12.29 +2 / - 0.500 0.5012 -8.67 +2 / -2 0.630 0.6310 -5.51 +2 / -2 0.800 0.7943 -3.09 +2 / -2 1.00 1.00 -1.59 +2 / -2 1.25 1.259 -0.85 +1 / -1 1.60 1.585 -0.59 +1 / -1 2.00 1.
Freq ( Hz) Nominal HVM200 Manual Freq ( Hz) True WM dB Tolerance dB 31.5 31.62 -15.09 +1 / -1 40.0 39.81 -17.10 +1 / -1 50.0 50.12 -19.23 +1 / -1 63.0 63.10 -21.58 +1 / -1 80.0 79.43 -24.38 +2 / -2 100 100.0 -27.93 +2 / -2 125 125.9 -32.37 +2 / -2 160 158.5 -37.55 +2 / -2 200 199.5 -43.18 +2 / - 250 251.2 -49.02 +2 / - 315 316.2 -54.95 +2 / - 400 398.1 -60.92 +2 / - 500 501.2 -66.91 +2 / - 630 631.0 -72.91 +2 / - 800 794.3 -78.
Typical Measurements Ranges Vibration - Fa Direct Charge (1000pF) ICP® Gain Noise Floor dBµV RMS Range dBµV Peak Range dBµV Noise Floor dBµV RMS Range dBµV Peak Range dBµV Noise Floor dBµV RMS Range dBµV Peak Range dBµV 0 dB See Note 1 60 dB 74-134 38 dB 99-137 See Note 1 60 dB 74-134 38 dB 99-137 See Note 1 60 dB 74-134 38 dB 99-137 20 dB See Note 1 60 dB 54-114 38 dB 79-117 See Note 1 60 dB 54-114 38 dB 79-117 See Note 1 60 dB 54-114 38 dB 79-17 40 dB 26 58 dB 36-94 36
Notes 1. The data in the above table was obtained by electrically testing the HVM200.
Direct Charge (1000pF) ICP® Gain Noise Floor dBµV RMS Range dBµV Peak Range dBµV Noise Floor dBµV RMS Range dBµV Peak Range dBµV Noise Floor dBµV RMS Range dBµV Peak Range dBµV 40 dB See Note 1 60 dB 34-94 38 dB 59-97 See Note 1 60 dB 34-94 38 dB 59-97 See Note 1 60 dB 34-94 38 dB 59-97 60 dB 14 50 dB 24-74 28 dB 49-77 14 50 dB 24-74 28 dB 49-77 14 50 dB 24-74 28 dB 49-77 Notes: 1.
Whole Body - Wd, We Direct Charge (1000pF) ICP® Gain Noise Floor dBµV RMS Range dBµV Peak Range dBµV Noise Floor dBµV RMS Range dBµV Peak Range dBµV Noise Floor dBµV RMS Range dBµV Peak Range dBµV 0 dB See Note 1 60 dB 74-134 38 dB 99-137 See Note 1 60 dB 74-134 38 dB 99-137 See Note 1 60 dB 74-134 38 dB 99-137 20 dB See Note 1 60 dB 54-114 38 dB 79-117 See Note 1 60 dB 54-114 38 dB 79-117 See Note 1 60 dB 54-114 38 dB 79-117 40 dB See Note 1 60 dB 34-94 38 dB 59-97 See
1. Under-Range (?) - The noise floor is below the measurement range of the analog to digital converter. 2. The data in the above table was obtained by electrically testing the HVM200.
• ISO 2631-4:2001 Mechanical vibration and shock -- Evaluation of human exposure to wholebody vibration -- Part 4: Guidelines for the evaluation of the effects of vibration and rotational motion on passenger and crew comfort in fixed-guideway transport systems • ISO 5349-1:2001 Mechanical vibration -- Measurement and evaluation of human exposure to hand-transmitted vibration -- Part 1: General requirements • ISO 5349-2:2001 Mechanical vibration -- Measurement and evaluation of human exposure to hand-tr
A-24 Standards Met HVM200 Manual
APPENDIX B Glossary The following table contains definitions and calculations for terminology used in the HVM200 manual. Term Equation Description RMS Acceleration Aeq = T 2 --1- a w t dt T 0 T= Integration time in seconds. aw (t) = instantaneous acceleration. t = Time, in seconds. The Aeq integration time is from Run to Reset; the display is updated once per second.
Term Energy Equivalent RMS Acceleration Equation Description The HVM100 measures the following quantities: 1 T 2 ------------------a t dt 8Hours w A 8 = 0 1 T 2 ------------------a t dt 4Hours w A 4 = 0 1 T 2 ------------------- a w t dt 2Hours A 2 = 0 1 T 2 ------------------a t dt 1Hours w A 1 = 0 Running RMS Acceleration LINEAR 1-- Arms = t0 2 aw t dt t 0- Integration time, in seconds.
Term Equation Description Vibration Dose Value 1 --- T 4 4 VDV = a w t dt 0 The VDV integration time is from Run to Reset; the display is updated once per second. The VDV is not calculated for units of dB or g. Maximum Transient Vibration Value Amax = maximum reading of all Arms readings from Run to Reset. Minimum Transient Vibration Value Amin = minimum reading of all Arms readings from Run to Reset.
Term Equation Description Short Term Crest Factor PeakCF = -----------Arms The CF measurement period is controlled by the Averaging time setting; a new CF value is calculated and displayed at the end of each Averaging time period. CF is not calculated if the Averaging time setting is SLOW.
APPENDIX A Regulatory Compliance Statement FCC This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Any changes or modifications not expressly approved by manufacturer could void the user’s authority to operate the equipment.
can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation.
