HT instruments HT157 - Manual (Page 59)

HT155 - HT157
EN - 57
10.2. STATISTIC ANALISYS CHARARCTERISTICS
 Functions:
SLM statistic analysis in weighting A
Frequency integration with programmable period
Statistic analysis in 24 hours (24H)
Analysis type Measured parameters (*)
Statistic
L
AFp
, L
AFmax
, L
AF5
, L
AF10
, L
AF50
, L
AF90
, L
AF95
, L
AFmin
, SD,
L
Aeq1s
, L
Aeq,T
, L
AE
, L
AfeqT.
24H L
d
, L
n
, L
dn
further to statistic analysis parameters
Integration
L
xyp
, L
xyi
, L
xeq,1s
, L
xeq,T
, L
AE
, E, C
peak+
, C
peak-
,L
AFmax
,L
AFmin
,L
AFeqT
, L
ASeqT
, L
AIeqT
(*) X = frequency weighting A/C/Z ; Y = time constants F/S/I
10.3. CHARACTERISTICS OF ANALYSIS IN 1/1 AND 1/3 OCTAVE BAND (HT157
ONLY)
 Functions:
Spectrum analysis of noise in octave band (1/1)
and 1/3 octave band with integration measure
 Frequency
weighting:
 A/C/Z
 Spectrum analysis interface:
spectrum frequency ensemble
 Total analysis interface:
realized with digital filter (see § 12.2)
 Weighting Z added with high-pass digital filter (cut-off frequency: 4Hz) (see § 12.4)
 Type of filter:
digital, G=2 for analysis 1/1 and 1/3 octave band
 Central frequencies of 1/1 octave band:
 16Hz, 31.5Hz, 63Hz, 125Hz, 250Hz, 500Hz, 1kHz, 2kHz, 4kHz, 8kHz, 16kHz (see §
12.2 and § 12.3)
 Central frequencies of 1/3 octave band:
 12.5Hz, 16Hz, 20Hz, 25Hz, 31,5Hz, 490Hz, 50Hz, 63Hz, 80Hz, 100Hz, 125Hz,
160Hz, 200Hz, 250Hz, 315Hz, 400Hz, 500Hz, 630Hz, 800Hz, 1kHz, 1.25kHz,
1.6kHz, 2kHz, 2.5kHz, 3.15kHz, 4kHz, 5kHz, 6.3kHz, 8kHz, 10kHz,12.5kHz, 16kHz
(see § 12.2)
 Measured parameters (*):
L
fmeq,1s
, L
fmeq,T
, L
xyp
, L
xyi
, L
xeq,1s
, L
xeq,T
, L
AE
, E, C
peak
Tm
(*) fm = central frequency; X = frequency weighting A/C/Z ; Y = time constants F/S/I
 Noise (E)’s exposure range :
0
 65.535Pa 2
h
10.4. CHARACTERITICS OF PORTABLE CALIBRATOR HT151
 Selectable SLM levels:
94dB and 114dB (reference 2x10
-5
Pa)
 Uncertainty: 0.3dB (94dB); 0.5dB (114dB)
 Reference
frequency: 1kHz
 1%
 Distortion:  1%
 Reference standard:
IEC 60942:2003 Class 1 and ANSI S1.40:1984
 Stability
time: 3s
 Operating
temperature: -10°C
 50°C (-14°F  122°F)
 Storing
temperature: -25°C
 0°C (-13°F  158°F)
 Reference
humidity: <90%HR
 Atmospheric
pressure: 65kPa
 100kPa
 Power supply:
1x9V battery type IEC 6F22 or NEDA 1604
 Dimensions:
117(L) x 53(
) mm ; 5(L) x 2()”
 Weight (with battery and ½” adapter):250g (9 ounces)