SoundAdvisor Model 831C
A-6
Storage Environment
: –30 to +60° C (–22 to
+158°F), less than 90% RH
Temperature Sensitivity
: ≤ 0.5 dB sensitivity, –10
to +50°C (14 to 122°F) at 1kHz
Humidity Sensitivity
: ≤ ±0.5 dB sensitivity, 25% to
90% relative humidity at 40°C (104°F) at 1kHz
Physical Characteristics
Dimensions
:
• 290 x 71 x 41 mm (11.35") including
microphone and preamplifier
• 224 x 71 x 41 mm (8.80") instrument body
only
Weight
:
• 531.6 g (18.8 oz) including batteries,
preamplifier and microphone
• 489.2 g (17.3 oz) including batteries
A.2 Base Software
Standards Met
Sound Level Standards:
• IEC 61672-1:2013 Class 1, Group X
• IEC 60651 Ed 1.2 (2001) plus Amendment 1
(1993-02) and Amendment 2 (2000-10) Type
1, Group X
• IEC 60804 (2000-10) Type 1, Group X
• ANSI S1.4-2014 Class 1
• ANSI S1.4-1983 (R2006) plus Amendment
ANSI S1.4A-1985 (R2006) Type 1
• ANSI S1.43-1997 (R2007) Type 1
• DIN 45657 Sound level meters - Additional
requirements for special measuring tasks
Correction Filters
• Frequency response correction filters are
available for sound field/microphone type
and
for
environmental
protection
accessories.
• Note: “RI” indicates “Random Incidence”
and “FF” indicates “Free-Field”
• For microphone 377B20: RI to FF
• For microphone 377B02: FF to RI
• For microphone 377B02 with EPS2106/8: FF
to RI, FF to FF, FF:90°
• For microphone 377B02 with EPS2116: FF
to RI, FF to FF, FF:90°
Table A.5 SLM with PRM831 and 377B02 Microphone
Frequency
0° Free Field
Corrections
1,2
1. add numbers in this column to levels read on the SLM to correct to the 0° Free Field level at frequency
2. From B&K 4226 Calibrator
3. From B&K UA033 EA
4. Corrections at 95% confidence.
EA - Electrostatic Actuator
WS - Windscreen
Note: Data was taken at reference conditions 23° C, 50% RH, 101.3 kPa
0° Free Field
Corrections with
WS
1,2
0° Free Field
Corrections
1,3
0° Free Field
Corrections with
WS
1,3
Expanded
uncertainty of
Corrections
1,4
Hz
dB re 1 kHz
dB re 1 kHz
dB re 1 kHz
dB re 1 kHz
dB
31.5
0.23
0.12
0.21
0.10
0.25
63
0.18
0.07
0.15
0.04
0.25
125
0.09
-0.02
0.10
-0.01
0.25
250
0.10
-0.01
0.07
-0.03
0.25
500
0.25
0.17
0.26
0.18
0.25
1000
0.00
0.00
0.00
0.00
0.25
2000
0.43
0.69
0.42
0.69
0.25
4000
0.97
0.94
0.97
0.95
0.25
8000
2.60
2.25
3.02
2.67
0.35
12500
5.65
5.33
6.51
6.19
0.50
16000
7.69
6.92
8.46
7.68
0.50
