Extech Instruments VB450 Manual de usuario

USER GUIDE

Vibration Meter

Model VB450

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Introduction

Thank you for selecting the Extech Instruments Model VB450.

The VB450 is a portable vibration meter consisting of an

acceleration sensor and a digital measurement display circuit.

It can be used to measure vibration displacement, speed (or

intensity) and acceleration of mechanical equipment.

Equipment such as fans, pumps, compressors, motors, etc. can

be tested.

This device is shipped fully tested and calibrated and, with

proper use, will provide years of reliable service.

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Safety Notes

Warning: Use extreme care when using this vibration meter to

test mechanical devices. Damage to meter and injury to

persons can occur if this meter is used in a manner not

specified in this User Guide or if nominal, preparatory safety

measures are not taken. Please refer to, and follow, the safety

directives below.

oDo not take measurements on devices where the range is

known to be, or expected to be, outside the specified

measurement range of this device.

oDo not use this instrument if its housing appears cracked,

chipped, or otherwise damaged.

oDo not use this instrument if the sensor or its cable appears

damaged or compromised in any way.

oReplace the battery as soon as the low battery symbol

appears on the meter display.

oRemove the battery if the device is to be stored for > 60

days.

oNever dispose of batteries in a fire. Batteries may explode

or leak.

oDo not attempt to charge the 9V battery. The supplied 9V

battery is not rechargeable. This meter was not designed to

use rechargeable batteries.

oIf the meter operates abnormally, stop testing and have

the unit serviced before further use.

oNever use the meter in a wet environment or in an

atmosphere of combustible or explosive gas.

oDo not open the meter housing; there are no user-

serviceable parts. Contact Extech Instruments directly or

contact point-of-sale personnel for service inquiries.

oProtect the meter’s LCD from shock or vibration; allow only

the magnet and sensor to touch the devices under test.

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Meter Description

1. LCD Display

2. Three-position switch (selects measurement units)

3. Sensor and magnet

4. Lanyard

5. Power and Data Hold button

6. Service access nut (do not loosen; for service use only)

7. Sensor secure nut (turn counter-clockwise to loosen)

Battery Compartment on rear of meter

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Operation

Battery Installation and Replacement

Remove the rear battery compartment door by sliding in the

direction of the arrow. Install or replace 9V battery (observe

polarity) and replace the cover.

During operation, if the symbol appears in the display

the battery needs to be replaced.

Never dispose of used batteries or rechargeable batteries in

household waste.

As consumers, users are legally required to take used

batteries to appropriate collection sites, the retail store

where the batteries were purchased, or wherever batteries

are sold.

Disposal: Do not dispose of this instrument in household waste. The

user is obligated to take end-of-life devices to a designated collection

point for the disposal of electrical and electronic equipment.

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Selecting units of measure

Press and hold the power button. The display will illuminate

and an arrow will indicate the units selected. Slide the function

switch on the top of the meter to select the units desired.

m/s2

Acceleration

Meters per second

squared

PEAK

mm/s

Velocity

Millimeters per second

squared

RMS

m

Displacement

micrometers

Peak to

Peak

Measurements

Attach the sensor to the device to be measured with the

magnet or hold the sensor for nonferrous materials. Press and

hold the power button to display the results. Release the

power button to freeze the results in the display. After 60

seconds the meter will automatically shut off.

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Specifications

General Specifications

Display 3 ½ digit LCD (0~1999)

Sensor Accelerometer (magnetic base)

Cable Length 0.2m (7.9”) coiled cable

Low battery indication symbol

Power supply 9V Battery

Battery life Approx. 20 hours (alkaline)

Operating conditions 0 to 40oC (32 to 104oF) <90% RH

Storage conditions 0 to 40oC (32 to 104oF) <80% RH

Dimensions 185 x 68 x 30mm (7.3 x 2.7 x 1.2”)

Weight 300 g (10.6 oz.) including battery

Safety Standards GB 4793, 1-2007

For indoor use only

Range and Accuracy

Function

Acceleration

(Peak)

Velocity

(RMS)

Displacement

(Peak to Peak)

Range

0.1 to 199.9m/s2

0.1 to

199.9mm/s

1 to 199.9m

Frequency

Response

10 to 1500Hz

10 to 500Hz

Accuracy

0 to 2.0m/s2

±(10%+ 1 digit)

>2.0m/s2

±(5%+ 1 digit)

0 to 2.0m/s

±(10%+ 1d)

>2.0m/s

±(5%+ 1d)

0 to 2.0μm

±(10%+ 1 digit)

>2μm

±(5%+ 1 digit)

ISO-9001 Certified

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