Larson Davis SoundTrack LxT User manual

®
LxT Manual
for
SoundTrack LxT
& SoundExpert LxT
TM

I770.01 Rev K Supporting Firmware Version 2.301
Larson Davis
LxT Manual
for
SoundTrack LxT
& SoundExpertLxT

Copyright
Copyright 2016 by 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, SoundTrack LxTand SoundExpertare registered trademarks of PCB Piezotronics, Inc.
Swithcraftis a registered trademark of Switchcraft, Inc. All other trademarks are property of their
respective owners.
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.
Record of Serial Number and Purchase Date
LxT Model: LxT1 LxT2 Serial Number: ___________
Preamplifier Model: ________ Serial Number: ___________
Microphone Model: _________ Serial Number: ___________
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:
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.
PCB Piezotronics, Inc.
Attn: Recycling Coordinator
1681 West 820 North
Provo, Utah, USA 84601-1341

Table of Contents
Chapter 1 LxT Features 1-1
SoundTrack LxT................................................................................................. 1-1
SoundExpertLxT ............................................................................................... 1-5
Chapter 2 Overview 2-1
LxT Components ................................................................................................... 2-1
Summary of Displays and Icons ........................................................................... 2-6
Navigating and Selecting ...................................................................................... 2-8
Basic Run Functions ............................................................................................. 2-9
Tab and Setting Displays ...................................................................................... 2-9
Chapter 3 Preparing for First Use 3-1
Unpacking and Inspection ..................................................................................... 3-1
Connecting the Microphone and Preamplifier ...................................................... 3-2
Connecting the Preamplifier to the LxT ............................................................... 3-3
Disconnecting the Preamplifier from the LxT ...................................................... 3-4
Powering the SoundTrack LxT ............................................................................. 3-4
Chapter 4 Basic Measurement Setup 4-1
Measurement Settings Tabs .................................................................................. 4-1
Chapter 5 Data Display 5-1
Data Labels ........................................................................................................... 5-1
Tabbed Display ..................................................................................................... 5-1
Live Tab ................................................................................................................ 5-3
Overall Tab ........................................................................................................... 5-8
Session Log Tab .................................................................................................. 5-20
View Spectrum Normalized (Optional) .............................................................. 5-21
Chapter 6 Making Measurements 6-1
Preparation ............................................................................................................ 6-1
Positioning the LxT ............................................................................................... 6-1
Performing Measurements .................................................................................... 6-2
Storing Measurements ........................................................................................... 6-7
Data Storage After Improper Shutdown ............................................................... 6-8
Chapter 7 Calibration 7-1
Calibration Overview ............................................................................................ 7-1

Control Panel - Calibrate .......................................................................................7-2
Acoustic Calibration ..............................................................................................7-4
Sensitivity Tab .....................................................................................................7-11
Calibration Without Preamplifier ........................................................................7-13
Certification .........................................................................................................7-14
Chapter 8 Voice Recording 8-1
Launching the Voice Recorder Dialog ..................................................................8-1
Making a Voice Recording ....................................................................................8-2
Playing a Voice Recording ....................................................................................8-3
Storing Voice Recordings ......................................................................................8-3
Chapter 9 Time History 9-1
Parameters Logged ................................................................................................9-1
Time History Setup ................................................................................................9-3
Time History Tab ...................................................................................................9-5
Link to Measurement History Display ..................................................................9-8
Markers ..................................................................................................................9-9
Chapter 10 Measurement History 10-1
Enabling Measurement History ...........................................................................10-1
Continuous and Timer Modes .............................................................................10-2
Timed Stop Mode ................................................................................................10-3
Manual and Stop When Stable Modes .................................................................10-3
Display of Measurement History .........................................................................10-3
Link to Time History .........................................................................................10-12
Chapter 11 Data Explorer 11-1
Control Panel - Data Explorer .............................................................................11-1
Chapter 12 System Properties 12-1
Control Panel - System Properties .......................................................................12-1
Device ..................................................................................................................12-2
Time .....................................................................................................................12-3
Power ...................................................................................................................12-4
Preferences ...........................................................................................................12-8
Localization .......................................................................................................12-15
Displays .............................................................................................................12-17
Options ...............................................................................................................12-21

Chapter 13 Lock/Unlock the LxT 13-1
Control Panel - Lock ........................................................................................... 13-1
Fully Locked ....................................................................................................... 13-4
Locked With Auto-Store ..................................................................................... 13-5
Locked With Manual-Store ................................................................................. 13-7
Calibration When The LxT Is Locked ................................................................ 13-7
Chapter 14 About 14-1
Control Panel - About ......................................................................................... 14-1
About Tab ........................................................................................................... 14-1
Standards ............................................................................................................. 14-2
Options ................................................................................................................ 14-3
User ..................................................................................................................... 14-3
Chapter 15 System Utilities 15-1
System Utilities ................................................................................................... 15-1
File System .......................................................................................................... 15-2
Chapter 16 Parameters Measured 16-1
Basic Sound Level Measurements ...................................................................... 16-1
Sound Exposure Metrics Measured .................................................................... 16-3
Statistical Metrics Measured ............................................................................... 16-4
Community Noise Parameters ............................................................................ 16-4
Exceedance Counters .......................................................................................... 16-5
Miscellaneous Parameters ................................................................................... 16-5
Chapter 17 Memory Utilization 17-1
Out Of Memory Stop .......................................................................................... 17-1
Overall Data ........................................................................................................ 17-1
Session Log ......................................................................................................... 17-1
Measurement History .......................................................................................... 17-1
Time History ....................................................................................................... 17-2
Voice Messages ................................................................................................... 17-2
Chapter 18 Upgrading Firmware and Options 18-1
SLM Utility-G3 ................................................................................................... 18-1
Upgrading LxT Firmware ................................................................................... 18-1
Upgrading LxT Options ...................................................................................... 18-4
Appendix A Technical Specifications A-1

Standards Met by LxT .......................................................................................... A-1
LxT Specifications ................................................................................................ A-2
Electromagnetic Emission ..................................................................................A-15
1/1 and 1/3 Octave Filters ...................................................................................A-16
Position of Instrument and Operator ...................................................................A-19
Frequency Response ...........................................................................................A-20
Microphone Preamplifier Specifications ............................................................A-43
Vibration Sensitivity ...........................................................................................A-59
Appendix B Testing to IEC61672-1 1
Sections 5, 6, 7 and 9 (except 9.3) ........................................................................ B-1
LxT1 ..................................................................................................................... B-8
LxT2 ................................................................................................................... B-13
Appendix C Glossary and Formulas C-1

LxT Manual LxT Features 1-1
CHAPTER
1LxT Features
This chapter describes the features for the SoundTrack
LxTand SoundExpertLxTsound level meters.
SoundTrack LxT
The following sections describe the features for the
SoundTrack LxT.
Hardware Features
The Larson Davis SoundTrack LxT has the following
features:
• Precision integrating sound level meter
• 2 GB unformatted standard data memory
• 160 X 240 pixel LCD display with backlight and icon-
driven user interface
• Silent Touch elastomeric keypad
• Large dynamic range
• Jack for AC/DC output or headset (ACC003)
• Preamplifier can drive a 61 m (200 ft.) microphone
extension cable (EXC200)
• 4-AA batteries provide 16 hour operating time
• USB 2.0 peripheral connector
• Field-upgradeable firmware
• Windscreen (WS001)
Basic Measurements
• SPL, Leq, Lmax, Lmin, SEL, Lpeak, Lpeak(max)
• RMS Detectors: Slow, Fast & Impulse
• RMS Frequency Weighting: A, C & Z
• Peak Frequency Weighting: A, C & Z
•L
Nstatistics: 6 user-selected values over the range (L0.01
through L99.99) and Histogram tables
• 2 Sets of hygiene metrics: Lavg, TWA(x), Dose,
ProjDose, Lep,d

1-2 SoundTrack LxT LxT Manual
•E,E8,E40
• SEA peak exposure
• 2 RMS event counters and 3 Peak event counters
Basic Operation
• Auto-Store with Auto-Reset
• Run Timer and Stop-When-Stable Control
• Real-time clock
• Start time, elapsed time and paused time
• Time stamping for Lmax, Lmin, Lpeak(max) metrics
• Session Log
• Lock functions
• Calibration with calibration history and list of calibrators
• Power management
• Status bar and About display
• Multiple language support
• Data files and Data Explorer
• Automatic data backup to prevent data loss on power
failure
• Overall measurement
Available Options
•LXT-OB1: Real-time 1/1 Octave Frequency Analysis
•LXT-OB3: Real-time 1/3 & 1/1 Octave Frequency
Analysis
•LXT-LOG: Automatic data logging with intervals from
1 second to 24 hours
•LXT-HSLOG: Extends data dogging (LXT-LOG) with
intervals down to 100 milliseconds
•LXT-ENV: Measurement History Environmental Data
Logging
•LXT-CN: Community Noise

LxT Manual SoundTrack LxT 1-3
•LXT-DVA: Digital Voice Annotation (includes headset
ACC003)
Standard Accessories
The LxT is delivered with the standard accessories described
below.
• One of the following preamplifier/microphone
combinations:
-PRMLXT1 preamplifier with a 377B02 micro-
phone
-PRMLXT1L preamplifier with a 377B02 micro-
phone
-PRMLXT2B preamplifier with a 375B02 micro-
phone
-PRMLXT2L preamplifier with a 375B02 micro-
phone.
• SWW-SLM-UTILG4 SLM Utility-G4 software
• SWW-SLM-UTILG3 SLM Utility-G3 software
•WS001 Windscreen, 3 1/2 in. diameter
• Alkaline Batteries: 4-AA
•Lanyard
Optional Accessories
Equivalent Electrical Impedance Adaptor
An equivalent electrical impedance adapter can be used in
place of the microphone when a measurement is being made
electrically. The adapter is simply a series capacitor with the
same capacitance as the microphone it is replacing. The
following adapters are available:
•ADP002 6.8pF adaptor for 1/4 in., 7pF microphone
(377C01 or 377C10)
•ADP005 18pF adaptor for 1/2 in., 18pF microphone
(375B02)
•ADP090 12pF adaptor for 1/2 in., 12 pF microphone
(377B02)

1-4 SoundTrack LxT LxT Manual
Cables
Direct Input Cable or Adaptor
•EXCXXX Microphone extension cable, where XXX is
the length in feet (XXX = 010, 020, 050, 066, 100 and
200 available)
•CBL138 USB Cable
•CBL139 AC/DC Output Cable
Power Supplies
•PSA029 Universal AC Power Adaptor
•PSA031 12 Volt DC to USB Power Adaptor
•BAT015 External battery powering device for the LxT,
holding 4 or 8 D-sized alkaline 1.5 volt batteries to
extend run time
Software
•SWW-BLAZE-LXT Blaze
• SWW-DNA DNA
Accessory Kits
•LXT-ACC including
- LXT-CCS Hard Shell Case
-CAL200 Class I Calibrator
-PSA029 Power Supply
-CBL138 USB Cable
•LXT-ACC1 including
- LXT-CCS Hard Shell Case
- CAL150 Class I Calibrator
- PSA029 Power Supply
- CBL138 USB Cable
Other
• 377C20 1/2” random incidence pre-polarized
microphone, 50 mV/Pa, providing performance
conforming to Class 1 sound level meter standards
• ACC003 Headset with microphone for voice recording/
Playback (included LXT-DVA)

LxT Manual SoundExpertâ LxT 1-5
•LXT-CCS Storage Case
Environmental Protection
•EPS2116 Environmental Shroud
•EPS2106-2 Environmental Shroud
•EPS2108-2 Environmental Shroud
•EPS030-LXT Environmental Case with one lead acid
battery to be used with an external microphone tripod
(the tripod is not included)
Tripods
•TRP001 Instrument/Camera Tripod with ADP032 1/2
in. microphone clip. Use with EPS2108-2
•TRP002 Microphone Stand with adjustable height and
boom angle
•TRP003 Support Tripod, heavy duty, can be used with
EPS030 or EPS2106-2
Calibrators
• CAL150
• CAL200
Printer
•PRN003 USB Serial Printer
SoundExpertLxT
The SoundExpert LxT sound level meter provides targeted
measurement of environmental noise, and is sold in two base
models:
• LXT1-SE-FF: SoundExpert LxT with free-field
microphone (377B02)
• LXT1-SE-RI: SoundExpert LxT with random
microphone (377C20).

1-6 SoundExpertâ LxT LxT Manual
Hardware Features
The hardware features for the SoundExpertLxT are the
same as those for the SoundTrack LxT.Additionally, the
following accessories are included with the SoundExpert
LxT:
• PSA029 Power Supply
• CBL138 USB Cable
Standard Features
The SoundExpert LxT is delivered with the standard
features listed below.
•LXT-LOG: Automatic data logging with intervals from
1 second to 24 hours
•LXT-ENV: Measurement History Environmental Data
Logging
•LXT-CN: Community Noise
•LXT-OB3: Real-time 1/1 & 1/3 Octave Band Analysis
Standard Accessories
The SoundExpert LxT is delivered with the standard
accessories described below.
•CBL138 USB Cable
•PSA029 Universal AC Power Adaptor
• One of the following preamplifier/microphone
combinations:
-PRMLXT1 preamplifier with a 377B02 micro-
phone
-PRMLXT1L preamplifier with a 377B02 micro-
phone
-PRMLXT1 preamplifier with a 377C20 micro-
phone
-PRMLXT2L preamplifier with a 375C20 micro-
phone.
• SWW-SLM-UTILG4 SLM Utility-G4 software
• SWW-SLM-UTILG3 SLM Utility-G3 software
•WS001 Windscreen, 3 1/2 in. diameter
• Alkaline Batteries: 4-AA

LxT Manual SoundExpertâ LxT 1-7
•Lanyard
Optional Accessories
Equivalent Electrical Impedance Adaptor
An equivalent electrical impedance adapter can be used in
place of the microphone when a measurement is being made
electrically. The adapter is simply a series capacitor with the
same capacitance as the microphone it is replacing. The
following adapters are available:
•ADP090 12pF adaptor for 1/2 in., 12 pF microphone
(377B02)
Cables
Direct Input Cable or Adaptor
•EXCXXX Microphone extension cable, where XXX is
the length in feet (XXX = 010, 020, 050, 066, 100 and
200 available)
•CBL139 AC/DC Output Cable
Power Supplies
•PSA031 12 Volt DC to USB Power Adaptor
•BAT015 External battery powering device for the
SoundExpertLxT, holding 4 or 8 D-sized alkaline 1.5
volt batteries to extend run time
Software
•SWW-BLAZE-LXT Blaze
• SWW-DNA +SWW-DNA-LXT
Other
• 377C20 1/2” random incidence pre-polarized
microphone, 50 mV/Pa, providing performance
conforming to Class 1 sound level meter standards
•LXT-CCS Storage Case
Environmental Protection
•EPS042 LxT1-SE-XX +BAT015 in small hard-shell
carrying case

1-8 SoundExpertâ LxT LxT Manual
•EPS2106/8-2 Environmental Shroud for outdoor
microphone protection
•EPS030-LXT Environmental Case with one lead acid
battery to be used with an external microphone tripod
(the tripod is not included)
Tripods
•TRP001 Instrument/Camera Tripod with ADP032 1/2
inch microphone clip. Use with EPS2108-2
Calibrators
• CAL200
•CER-LXT1LxT calibration with report
•CER-MICMicrophone calibration

LxT Manual Overview 2-1
CHAPTER
2Overview
This chapter provides an overview of the SoundTrack
LxTsound level meter, including the following sections:
• LxT Components
• Summary of Displays and Icons
• Navigating and Selecting
• Basic Run Functions
• Tab and Setting Displays
LxT Components
FIGURE 2-1 The LxT
Microphone
Preamplifier
LCD Display
Keypad
Connectors

2-2 LxT Components LxT Manual
The standard LxT shown in FIGURE 2-1 includes the
following:
• 1/2 in. diameter condenser microphone
• Backlit graphic 160 x 240 pixel LCD display
• 13-key soft rubber backlit keypad
• AC/DC output, control, USB, and external power
connectors (shown in FIGURE 2-2)
• True “hand held” instrument with “sure grip” pads
FIGURE 2-2 LxT Bottom View
DO NOT use the hardware power
switch to turn the LxT OFF. This may
cause data to be lost. Press the 0
(ON/OFF) key, then the Off soft key
to turn the LxT off.
•Hardware Power Switch: When set to “O”, the
hardware power switch completely powers down the
LxT for storage. Set the switch to “|” for instrument
operation.
•USB Interface: The USB 2.0 full-speed peripheral port
is used to control LxTs from PCs and transfer data to PCs
using a CBL138 or other USB cables under 5 m in
length. The LxT can also be powered via USB interfaces
using PSA029 external power supplies.
Hardware Power Switch USB Interface AC/DC Output and Headset Jack
Auxiliary Connector

LxT Manual LxT Components 2-3
•AC/DC Output and Headset Jack: This jack is used to
output analog AC and DC signals or to connect to
headsets for recording and playback of voice records
•Auxiliary USB Connector: The auxiliary USB
connector allows attaching USB storage devices.
Display
The LxT has a 160 x 240 graphic, liquid crystal display that
is backlit to provide comfortable viewing in most ambient
light situations. Controls are provided for contrast and
backlight adjustments.
When the LxT is first turned on, a display similar to
FIGURE 2-3 is shown.
FIGURE 2-3 Data Display Screen
Measurement
Name
OBA Overload Icon Input Overload Icon
Run Time
Measurement
Status
Power Indicator
Tabs Position
Indicator
Scroll Bar
Stability
Indicator
Left
Softkey
Center
Softkey
Right
Softkey

2-4 LxT Components LxT Manual
Keypad
The LxT has a 13 button keypad. This section describes the
buttons on the keypad.
Softkeys
The three buttons just beneath the display, on the body of the
LxT, are called Softkeys, as shown in Figure 2-3. Above
each Softkey, on the bottom of the display, is an icon or label
indicating the action that takes place when the key is
pressed. Softkeys are so named because the action
associated with the key can change.
Hardkeys
The ten remaining keys below the Softkeys are shown in
FIGURE 2-4 and are described in TABLE 2-1.
FIGURE 2-4 LxT Keys
Left
Softkey
Center
Softkey
Right
Softkey
RUN/PAUSE
STOP/STORE
UP
RIGHT
DOWN
LEFT
ENTER
RESET TOOLS
POWER

LxT Manual LxT Components 2-5
.
Use the Power, or ON/OFF button to turn the LxT on and off. The hardware
power wwitch on the base of the unit must be in the “|” position.
Use the Navigation buttons Up,Down,Left and Right to move to areas on the
display, to make selections from multiple options, or to enter alphanumeric
characters into data fields.
Use the Enter button to select data, options, or displays or to enter alphanu-
meric characters into data fields.
Use the Run/Pause button to initiate and pause measurements, and to continue
paused measurements.
Use the Stop/Store button to stop measurements and to store measurements
when measurements are stopped.
Use the Reset button to reset measurements.
Use the Tools button to specify settings such as date and time, managing power
options and setting personal preferences (i.e. language, decimal and date for-
mats, etc.).
TABLE 2-1 Keypad Hardkeys