SoundAdvisor Model 831C
A-11
A.3.3 Measurement System
Integration Method
:
• Equivalent level integration method can be
Linear or Exponential.
• Exponential integrates the output of the
selected time weighting (Slow, Fast or
Impulse)
Integration Time
:
• Minimum: 0.1 s
• Maximum, <0.5dB error: > 23 days
Frequency Weightings
: A, C, Z parallel and
simultaneous for each Time Weighting, selected
frequency weighting (A, C or Z) indicated by
Peak Frequency Weightings
: A, C, Z parallel, selected
peak frequency weighting (A, C or Z) indicated by
Time Weightings/Detectors
: Slow, Fast, Impulse,
Linear and Peak simultaneously, selected time
weighting (S, F or I) indicated by
Peak Rise Time
: 30 µs
A.3.4 Measurements
Instantaneous “Live” Metrics
For display and profile graph, not stored with
measurement.
A primary frequency and time weighting is selected by
setting for RMS and Peak level to display, all levels are
available in an “Any Level” matrix.
A.3.5 Overall Metrics
A primary frequency and time weighting is selected by
setting for RMS and Peak level to display, all levels are
available in an “Any Level” matrix.
Occurrence Time for Minimum and Maximum Levels
Percentile Levels, percentages n1 through n6
selectable, 0.01 to 99.99%
Statistics are sampled every 10ms from the selected
frequency and time weighted detector.
Exceedance Metrics, exceedance levels (L1, L2, P1, P2
and P3) selectable in dB from 0.0 to 200.0, counts each
Time
Weighting
A
C
Z
Units
Linear
L
Aeq
L
Ceq
L
Zeq
dB
Slow
L
AS
L
CS
L
ZS
dB
Fast
L
AF
L
CF
L
ZF
dB
Impulse
L
AI
L
CI
L
ZI
dB
Peak
L
Apeak
L
Cpeak
L
Zpeak
dB
Time
Weighting
A
C
Z
Units
Linear
1
L
Aeq
L
Ceq
L
Zeq
dB
Linear
2
L
A
Ƭ
eq
L
C
Ƭ
eq
L
Z
Ƭ
eq
dB
Slow
Maximum
L
ASmin
L
CSmin
L
ZSmin
dB
Slow
Minimum
L
ASmax
L
CSmax
L
ZSmax
dB
1. Linear integration method selected by user
2. Exponential Integration method selected by user
Fast
Minimum
L
AFmin
L
CFmin
L
ZFmin
dB
Fast
Maximum
L
AFmax
L
CFmax
L
ZFmax
dB
Impulse
Minimum
L
AImin
L
CImin
L
ZImin
dB
Impulse
Maximum
L
AImax
L
CImax
L
ZImax
dB
Peak
L
Apeak(max)
L
Cpeak(max)
L
Zpeak(max)
dB
Time
Weighting
A
C
Z
Units
Slow
Maximum
T
ASmin
T
CSmin
T
ZSmin
y/m/d
h:m:s
Slow
Minimum
T
ASmax
T
CSmax
T
ZSmax
y/m/d
h:m:s
Fast
Minimum
T
AFmin
T
CFmin
T
ZFmin
y/m/d
h:m:s
Fast
Maximum
T
AFmax
T
CFmax
T
ZFmax
y/m/d
h:m:s
Impulse
Minimum
T
AImin
T
CImin
T
ZImin
y/m/d
h:m:s
Impulse
Maximum
T
AImax
T
CImax
T
ZImax
y/m/d
h:m:s
Peak
T
Apeak(max)
T
Cpeak(max)
T
Zpeak(max)
y/m/d
h:m:s
Units
1
L
ωƬ
n1
dB
2
L
ωƬ
n2
dB
3
L
ωƬ
n3
dB
4
L
ωƬ
n4
dB
5
L
ωƬ
n5
dB
6
L
ωƬ
n6
dB
1. Linear integration method selected by user
2. Exponential Integration method selected by user
