PCB Piezotronics Larson Davis HVM200 Bedienungsanleitung

IHVM200.01 Manual

DRAFT

Larson Davis

HVM200 Manual

DRAFT

manual may not be copied in whole or in part for any use without prior written consent of PCB

Piezotronics, Inc.

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Disclaimer

The following paragraph does not apply in any state or country where such statements are not

agreeable with local law:

Even though PCB Piezotronics, Inc. has reviewed its documentation, PCB Piezotronics, Inc. makes no

warranty or representation, either expressed or implied, with respect to this instrument and

documentation, its quality, performance, merchantability, or fitness for a particular purpose. This

documentation is subject to change without notice, and should not be construed as a commitment or

representation by PCB Piezotronics, Inc.

This publication may contain inaccuracies or typographical errors. PCB Piezotronics, Inc. will

periodically update the material for inclusion in new editions. Changes and improvements to the

information described in this manual may be made at any time.

Recycling

PCB Piezotronics, Inc. is an environmentally friendly organization and encourages our customers to

be environmentally conscious. When this product reaches its end of life, please recycle the product

through a local recycling center or return the product to:

PCB Piezotronics, Inc.

Attn: Recycling Coordinator

1681 West 820 North

Provo, Utah, USA 84601-1341

where it will be accepted for disposal.

Warranty

For warranty information, refer to our Terms and Conditions of Sale on our website at

www.larsondavis.com/TermsConditions.aspx.

HVM200 Purchase Information

Record the serial number and date of purchase below.

Serial Number:_______________________ Date of Purchase:____________________

HVM200 Manual Introduction 1-1

CHAPTER

1Introduction

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.

The HVM200 provides the following features for vibration

measurement:

• Whole body, hand-arm, and general vibration

applications

• Wireless mobile interface

• Compact design for easy wear and convenient placement

• Mobile G4 measurement application for configuring,

measuring, and viewing vibration data on multiple

meters

• Connection and control of multiple meters through Wi-Fi

access (

• Support for optional 1/1 and 1/3 Octave Band Analysis

• Support for full SLM Utility G4 Software analysis

Standard Accessories

• USB 2.0 to Micro-USB power and communications

cable

• Removable 64 GB SD memory

Optional Accessories

• 1/1 and 1/3 Octave Band Analysis firmware

• SLM Utility G4 for HVM Software

• Larson Davis PSA035 Power Supply

1-2 Transducer Selection HVM200 Manual

• 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

Optional Larson Davis CCS047

Hard Shell Case

• Larson Davis CBL210-05, CBL216, and CBL217-01

cables for connection between accelerometers and

HVM200 meter.

• Larson Davis 394C06 Hand-held Shaker for vibrational

measurement verification

• Larson Davis CCS047 Hard Shell Case for transport and

protection of HVM200 and accessories

Transducer Selection

The HVM200 requires a transducer to convert physical

vibration quantities into measurable, electrical signals. In

selecting a transducer for the HVM200, consider the

following

ICP®or Charge Accelerometers

The HVM200 has built-in ICP®

power supplies and charge

amplifiers. This allows the HVM200

to interface directly with ICP or

charge transducers, and eliminates

the need for external signal

conditioning.

•ICP

accelerometers are also called “Voltage Mode” or

“Low impedance” and may be known by various other

vendor trade names. ICP is PCB’s registered trademark

which stands for “Integrated Circuit Piezoelectric” and

identifies PCB sensors which incorporate built-in, signal

conditioning electronics. The built-in electronics serve to

convert the high impedance charge signal that is

generated by the piezoelectric sensing element to a

usable low impedance voltage signal which can be

readily transmitted over ordinary 2 wire or coaxial cables

to any voltage readout or recording device. The low

impedance signal can be transmitted over long cable

distances and used in dirty field or factory environments

with little signal degradation

HVM200 Manual Transducer Selection 1-3

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. To conduct

accurate measurements, it is necessary to condition this

signal to a low impedance voltage before it can be input

to a readout or recording device. A charge amplifier or

in-line charge converter is generally used for this

purpose.

Transducer Sensitivity

With accelerometers, the proper sensitivity depends on the

application being performed. If the application is a high

vibration level application, a low sensitivity should be

selected. For low vibration level applications, a high

sensitivity accelerometer should be used.

Transverse sensitivity may also affect measurements. It is

defined as the unwanted output signal of a motion sensor

when subjected to motion perpendicular to the sensitive

axis. This is usually expressed as a percent of the normal

axis sensitivity. For example if you are using a tri-axial

accelerometer and place an input signal on the Z axis, your

X axis could also be reading a level even though there is

really no x-axis signal present.

Resonant Frequency

The resonant frequency is defined as the frequency at which

the structure will readily vibrate. For accelerometers, there is

one frequency at which the accelerometer vibrates much

easier than at other frequencies. At this point, the reading

will be very high, and could overload the input of the

HVM200. However, for most of the recommended

accelerometers, the resonant frequency is well above the

upper limit of the HVM200, and will subsequently be

masked out by the low pass filter on the HVM200. If the

resonant frequency becomes an issue, it is recommended

that an external mechanical filter be used.

Frequency Range

Most recommended accelerometers will have a frequency

range sufficient for use with the HVM200. Refer to the

1-4 Transducer Selection HVM200 Manual

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. A ratio of as little as 1/10 is acceptable in extreme

circumstance

HVM200 Manual Getting Started 2-1

CHAPTER

2Getting 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.

Powering the HVM200

Before using your HVM200, you should charge the battery

completely by following these steps:

Step 1 Slide and remove the back battery cover from the

HVM200 meter.

FIGURE 2-1 Remove Battery Cover

Step 2 Insert the supplied battery into the HVM200 so that

the battery contacts align with the power contacts

in the device.

Step 3 Slide the back battery cover onto the HVM200.

2-2 Downloading the HVM200 App HVM200 Manual

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.

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. When fully charged,

the Power LED displays a solid green (not

blinking) color. This may take up to 6 hours,

depending on the type of USB port used to charge

the device.

Step 6 Once fully charged, allow the battery to

completely drain with HVM200 usage in the first

cycle before recharging. This allows the battery

power display in the software to more accurately

reflect battery life. After completing the first

cycle, avoid leaving the battery drained for

extended periods of time. This will maximize

overall battery life.

Downloading the HVM200 App

Once your HVM200 is fully charged, use your mobile

device to find and download the HVM200 app from Google

Play or the Apple Store®.

Power LED

Status LED Power Button

Micro-USB

port

HVM200 Manual Connecting to a Wi-Fi Network 2-3

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.

FIGURE 2-3 HVM200 App

Step 3 On the HVM200 Menu, select Setup Wi-Fi.

FIGURE 2-4 Wi-Fi Setup

Icon

2-4 Connecting to a Wi-Fi Network HVM200 Manual

Step 4 If no stored networks appear in the Networks

dialog box, select an available network and click

Add Network.

If you have already entered a

password and a stored network

appears, select it and click Connect

Network.

FIGURE 2-5 Networks Settings

Larson Davis recommends using

secure Wi-Fi networks with your

HVM200 meter.

Step 5 Enter the network password, if required, and click

Add.

With multiple stored networks, you

can establish a connection order by

assigning a priority number to the

network. An automatic connection is

first made to the network with the

highest priority. If multiple stored

networks have the same priority

number, an automatic connection is

made with the network displayed

higher on the list.

FIGURE 2-6 Enter Network Password

Step 6 Select the stored network and click Connect.

Step 7 Assign a connection priority value for the

network, if needed.

Step 8 If no network is available, click Set Access Point.

This enables the HVM200 to transmit and receive

data through Wi-Fi to your mobile device.

Click the up or down

arrow to raise or lower

the priority of the

network connection.

Secure network requires

password.

Higher numerical values

establish higher priority

in connection sequence.

If no network is

available, click to

transmit and receive data

through Wi-Fi from the

HVM200 to a mobile

device.

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