Larson Davis System 824 Guía de instalación

I824.02

March 3, 1998

System 824

Training Manual

Larson•Davis Inc.

1681 West 820 North

Provo, UT 84601-1341

Phone: (801) 375-0177

FAX: (801) 375-0182

www.lardav.com

System 824 USER MANUAL

1997 by Larson•Davis,

Incorporated. This manual and the software

described in it are copyrighted, with all rights

reserved. The software may not be copied in

whole or in part for commercial use without

prior written consent of Larson•Davis Inc. The

manual may not be copied in whole or in part

for any use without prior written consent of

Larson•Davis Inc.

Disclaimer

The following paragraph does not apply in any

state or country where such statements are not

agreeable with local law:

Even though Larson•Davis, Inc. has tested the

software and reviewed its documentation,

Larson•Davis Incorporated makes no warranty

or representation, either expressed or implied,

with respect to this software 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

Larson•Davis Inc.

This publication may contain inaccuracies or

typographical errors. Larson•Davis Inc. will

periodically update the material for inclusion in

new editions. Changes and improvements to the

program described in this manual may be made

at any time.

Please examine your instrument and record the

following information below. You may be asked

to give this information in any future

communications you have with Larson•Davis,

Inc.

System 824 Serial #______________________

Microphone Model #____________________

Microphone Serial # ____________________

Table of Contents

Chapter 1 System 824 Overview 1-1

General Description ................................................................................1-1

User Interface...........................................................................................1-3

Chapter 2 Setup

2-1

Simple Sound Analyzer (SSA)...............................................................2-1

Chapter 3 View

3-1

Any Data...................................................................................................3-1

RTA Live, RTA Max, and RTA Leq......................................................3-6

Chapter 4 Data

4-1

Chapter 5 Tools

5-1

About.........................................................................................................5-1

Calibration................................................................................................5-5

Modifying the Calibration Level ....................................................5-10

Clock/Timer...........................................................................................5-11

TIMER.................................................................................................5-15

Memory...................................................................................................5-22

Lock .........................................................................................................5-24

Power Monitor.......................................................................................5-25

Communication.....................................................................................5-34

Chapter 6 Log - Logging Sound Level Meter (Option 01) 6-1

Current SLM.............................................................................................6-2

Modifying the SLM Settings..............................................................6-4

Stats ...........................................................................................................6-9

Modifying the STAT Settings...........................................................6-10

Ln Centiles..............................................................................................6-11

Modifying the Ln Settings ...............................................................6-12

Exposure.................................................................................................6-15

Modifying the Exposure Settings ...................................................6-16

System 824Training Manual

Overall SLM ...........................................................................................6-18

Modifying the Overall SLM Settings..............................................6-20

Run Log...................................................................................................6-21

Time History ..........................................................................................6-22

Modifying the Time History Settings.............................................6-22

Viewing Time History Data.............................................................6-29

Intervals ..................................................................................................6-31

Modifying the Interval Settings......................................................6-32

Viewing Interval Data ......................................................................6-39

Exceedance History...............................................................................6-41

Modifying the Exceedance History Settings.................................6-42

Viewing Exceedance History Data .................................................6-50

Spectra Intervals....................................................................................6-53

Viewing Spectra Intervals................................................................6-57

2/19/98 System 824 Overview

1-1

CHAPTER

System 824 Overview

Congratulations! You now have your hands on the

smallest, most powerful, smartest Real Time Analyzer

and Precision Sound Level Meter available. We at Lar-

son Davis thank you for your purchase of the System

824, and hope you receive many years of good service

from it. This Training Manual has been developed to

jump-start your initiation into the use of your new

instrument. Consider it a “getting started” guide as

you get to know your 824.

General Description

This manual is best used accompanied with the instru-

ment. You will be guided through a step by step tour of

the System 824. The appropriate keypad button will be

shown on the page. The resultant 824 display will then

be presented to verify that you have performed the

correct action.

For example:

This is the

SETUP

button on the lower set of keys on

your 824. Pressing this button will present the SETUP

menu on the 824’s display:

1-2

System 824 Training Manual 2/19/98

You will likely ﬁnd the user interface of the System 824

to be very intuitive. However, it is recommended that

you initially follow the steps shown in this manual

until you have full exposure to the nuances of the

instrument’s operating system. It should also be men-

tioned that for detailed explanations of the System

824’s functions, you should defer to the System 824

User Manual. The purpose of this manual is to help the

user navigate through the 824 interface and make mea-

surements immediately. You will ﬁnd that it will also

be useful to refer to this guide when you are trying

something new with the 824.

Step 1

If you have not already done so, turn the 824

on by pressing the On/Off key:

The instrument will go through a brief start up cycle,

where it ﬂashes the 824 ID screen.

It will then switch to the display that was established

before it was powered off in its previous session. The

On/Off key can also be used the check the battery

power, as well as verify the on/off status of the dis-

play’s backlight. Press the On/Off key again to view

the PWR screen:

Battery life is expressed in a percentage (100% being

fully charged). If you are powering the 824 with an

2/19/98 System 824 Overview

1-3

external source (such as AC), the voltage value will be

shown on this screen.

You can also toggle the screen’s backlight by pressing

the right arrow key

The screen contrast can be adjusted by continuous

presses of

. Contrast is expressed as a num-

ber between 0 and 100. You will ﬁnd a value between

64 and 70 to be optimal.

Step 2

Press

to exit the PWR screen

User Interface

There are quite a few places you can go from here. It’s

worthwhile to discuss the 824 User interface, starting

with the instrument keypad. The three keys on the top

1-4

System 824 Training Manual 2/19/98

of the keypad (nearest the LCD screen) are used when

a measurement setup has been established and you are

ready to begin making measurements. Following is a

brief description of each of these keys.

- This is the RUN/STOP key. It initiates or ends a

measurement.

- The PAUSE key suspends a measurement. Press-

ing the pause key again will allow the measurement to

continue.

- RESET is used to clear the current measurement

from the display. The screen will clear and a new mea-

surement can be acquired.

The ﬁve keys located at the lower most part of the key-

pad affect the way that data is gathered, viewed, and

reported. Following is a brief description of each.

Pressing the key once gets you into the associated

menu. Pressing the key again (within the menu),

brings you out of the menu.

The VIEW key is used to choose which data type to

be displayed. The views available depend the mea-

surement setup that you have selected.

- The DATA key is used to access the data store and

recall functions of the 824.

- The SETUP key brings the user into the instrument

setup menu. From here, the user can select a pre-con-

ﬁgured measurement setup, create a new one, or edit

an existing setup.

- The TOOLS key is used to access the different sys-

tem settings of the 824 including setting the clock,

viewing the available memory, establishing 824 lock-

ing (security) system, and external communications.

824 calibration is also handled within this area.

- The PRINT key is used to establish the setting

required to communicate with an external serial

printer. The user also selects the type of report that

they wish to print from within this menu.

2/19/98 System 824 Overview

1-5

The arrow keys:

, provide a variety of

different navigation operations within the 824’s oper-

ating system. This includes maneuvering through

menus and displays. Typically, the up

and down

arrows move the user up and down through

menus and through parameters within the display

screens. The left

and right

arrows move the

user from one related screen to the next, control cursor

movement, and moves the user in and out of menus.

The check key

is used to select an option or choice

from an 824 menu. It is also used to access the various

Settings menus from within the measurement displays

(views).

1-6

System 824 Training Manual 2/19/98

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