LD-SoundExpert LxT

Precision sound level meter-LD-SoundExpert LxT

  • Integrating precision sound level meter of class 1,
  • Octave and octave bands
  • 2 GB of internal, nonvolatile memory,
  • Data recording with selectable parameters and adjustable sampling rate,
  • Measurement history serves as a second additional data logger next to the time course of the reading,
  • LCD and LED-backlit display,
  • USB communication
  • With METAS, PTB approval class 1

basic data
Averaging (integration method)Linear or exponential
RMS-term reviewSlow, fast or pulse
RMS FrequencyA, C or Z
Peak FrequencyA, C or Z
sampling rate51,200 Hz
Peak rise time≤30 µs
Field level error (OBA)≤± 0.1 dB
conformityANSI Type 1, IEC Class 1
areasSingle of the broadband, two areas for OBA
Max. Time deviation at 25 ° C<2.6 s per day
Octave and Terzbandfilter
Octave Band Filters8 ... 16,000 Hz
Terzbandfilter6.3 ... 20,000 Hz
Filter selectionWithout octave filter, third octave filters or octave and third octave filters
frequencyA, C or Z (unweighted)
Maximum spectrumMaximum in each band or broadband L max
conformityANSI Type 1, IEC Class 1
Recording and measurement history
recording time1 s ... 24 h
Recorded parameterseq , L max , L min , LC Seq  - LA Seq , LA leq  - La eq , 
octave band OBA L eq , L max , L min , 
Terzband OBA L eq , L max , L min , LA FTm5 , 
battery voltage, internal temperature
Duration of the measurement history (contin. Berieb)1 min ... 24 h
Parameters of measurement historyeq , L min  with time, L max  with time, L peak  with time-out timer with duration, LA eq , LC eq , 
octave band OBA L eq , L max , L min , 
Terzband OBA L eq , L max , L min
Urban planning Noise
measured parametersLDEN, LDN
Day, evening, nightProgrammable
Evening and night penaltyProgrammable
Time-averaged values ??of the integration time
minimum1 s
Maximum (error / lt; 0.5 dB)<23 days
In percentiles
Number of custom Ln6
In resolution0.01%
Resolution of the distribution table0.1 dB
Marker for different types of noise
Number of markers10
predefined marker5
Measuring modes
existing modesManual stop, timed stop, stop if stable, continuous, single-block timing, daily block timing
manual stopDefined measurement operation / stop button
Timed stopTime in hh: mm: ss
Stop if stableChange <xx, x dB for hh: mm: ss
continuousAuto. File storage 
1x, 2x, 4x, 6x, 12x, 24x, 48x, 96x, 144x per day
Single block timingStart: date and time, end date and time
Day Block TimingUp to 3 blocks with each start and end dates, 
blocks the dateline may exceed
AC / DC output
connection2.5 mm stereo
AC output - maximum voltage± 2.3 V pk
AC output - Recommended load?16 ?
DC output - Resolution10 mV / dB (0 ... 100 dB)
DC output - term reviewFollows the adjustment of the sound level meter (F, S, I)
DC output - FrequencyFollows the adjustment of the sound level meter (A, C, Z)
Dynamic range (typical)
A rating17 ... 118 dB
C-Rating19 ... 118 dB
Z Review24 ... 118 dB
power supply
batteries4 AA (LR6) 1.5 V, lithium or alkali
External power supply5 V via USB port
AC power supplyPSA029 (worldwide)
12 V power supply (optional)PSA031 - 12 V DC  to 5 V DC
continuous operationTypically 18 h with alkaline batteries
continuous operationTypically 30 hours with lithium batteries
continuous operationUp to 19 days battery pack BAT015 (optional)
measures and weight
Length (complete)29.2 cm
Length (housing of the measuring instrument)23.4 cm
width7,1 cm
depth4,1 cm
Weight (including batteries)471 grams
Weight (with batteries, microphone and preamplifier)513 grams
Max. Cable length for preamplifier61 m
temperature sensitivity? ± 0.5 dB, -10 ... 50 ° C
storage temperature-30 ... 60 ° C
moisture sensitivity? ± 0.5 dB, 30 ... 95% RH at 40 ° C
Sound Expert lxd - Standards
standardsANSI S1.4-1985 (R2001): specifications for Type 1 sound level meters 
ANSI S1.43-1997 (2002): Specifications for Integrating type 1 sound level meters 
ANSI S1.11-2004: Specifications for octave and third octave analog filter and digital filter, type 1 
IEC 61672-1: 2002: class 1 sound level meter 
IEC 61260: 2001: octave and Terzbandfilter, class 1 
IEC 60651: 2001: sound Level meter 
IEC 60804: 2000: Integrating sound level meters 
IEC 61010-1: 2001 Ed 2.0 : safety requirements for electrical equipment for measurement, control and laboratory use, part 1: General requirements 
IEC 61326-1: 2005: electrical equipment for measurement, control and laboratory use, EMC requirements 
CE directive 2004/108 / EC

included supply
PRMLxT1LMicrophone Preamplifier(1)
377B02Prepolarised free-field microphone capsule(1)
PSA029Universal AC power supply(1)
CBL138USB cable, 2 m(1)
batteriesAlkaline batteries (AA)(4)
WS001Windshield (90 mm), 1/2 "microphone(1)

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