Scarlet Tech ST-11D, User Manual, Page: 6 / 32

Note 1: test conditions based on normal temperature and pressure, and only turn on the
basic functions.
Note 2: when the logging and recording function is open, the consumption of power will
add 40mA.
(13) Dim. (H×W×D) mm: 310 mm×72 mm×32 mm
(14) Weight (kg): 0.4
(15) Operation environment:
Air temperature: -15
°C
~+50
°C
Relative humidity: 10 %~90 %
Air pressure: 65 kPa~108 kPa
(16) Measurement range:
Above range is the value in the factory, it may change when users tune the calibration
value or replace the microphone. The lower limit is determined by the background noise
plus 8dB.
(17) Main Parameters of Measurement
ST-11D: LFp, LSp, LIp, Leq,t, Lpeak, Leq,T, LFmax, LFmin, LSmax, LSmin, LImax, LImin, SEL,
Lex8h, LAVG, TWA, DOSE, Ln1, Ln2, Ln3, Ln4, Ln5, SD,Ts, Tm, Volt, E.
Note: the n1 to n5 in Ln1-Ln5 can be chosen from 1 to 99.
(18) Memory capacity: 2GB (in ST-11D model)
(19) Logging and recording: optional (in ST-11D model)
(20) Lithium battery (optional): built-in charger module can be charged with 5V external
power supply through USB socket. Use high-capacity lithium battery with 2300mAh
Microphone
Type
AWA14425
AWA14423
AWA14411
AWA14431
Measureme nt
range
（ dB ）
45 ∼ 140
27 ∼ 120
43 ∼ 138
25 ∼ 80
35 ∼ 132
15 ∼ 112
65 ∼ 160
45 ∼ 140
Peak
factor
Ref.10
dB
45 ∼ 123
27 ∼ 103
43 ∼ 121
25 ∼ 101
35 ∼ 115
15 ∼ 95
65 ∼ 143
45 ∼ 123
measurement
range （ dB ）
70 ∼ 143
50 ∼ 123
70 ∼ 141
50 ∼ 121
60 ∼ 135
40 ∼ 115
90 ∼ 163
70 ∼ 143
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