Spartan 730/730IS Dosimeter Manual
A-11
Option 730-OB1 OBA Measurement System
Option 730-OB1 Octave Band Analysis Measurements
A.1.6 Time History Specifications
Filter Type and
Sample Rate
Digital filters on this model sample at a rate of 32,000 samples per second (sps)
with Base 2 center frequencies and real-time performance for all filters.
Single-range, the reference input signal is 0.1 Volt rms at 1 kHz.
Exact Center
Frequencies
31.25, 62.5, 125, 250, 500, 1000, 2000, 4000, and 8000 Hz
Nominal Frequencies
32, 63, 125, 250, 500, 1000, 2000, 4000, and 8000 Hz
Maximum Input
1.58 Vrms
(Single range (for ANSI S1.11 and IEC 61260-1,2014, section 5.19)
Integration Method
Linear for Leq
Exponential for OBA Min and OBA Max
Frequency Weighting
Z
Time Weighting/Detectors
Time Weighting (Slow, Fast, or Impulse), indicated by
Ƭ
(follows SLM Detector
setting).
To calculate OBA Min and Max values, time weighting follows the Exceedance
Detector setting.
Resolution
0.1 dB
Reference Attenuation
0.0 dB (for all bands)
Instantaneous “Live”
Metrics
OBA Live Equivalent Level Spectrum, 1 second. (For display only. Not stored with
measurement data.)
Overall Metrics
To calculate OBA Min and Max values, time weighting (noted by
Ƭ)
follows the
Exceedance Detector setting (Slow, Fast, Impulse).
Period
1 sec, 1 min
Linear
Units
LZ
eq
, 1s
dB
Linear
Units
Overall Equivalent Level Spectrum
L
eq(f)
dB
Overall Maximum Level Spectrum
L
Ƭmax
(f)
dB
Overall Minimum Level Spectrum
L
Ƭmin
(f)
dB
