Time History Software - Option 831C-Log; Ptb Approved Firmware - Larson Davis SoundAdvisor 831C Reference Manual

A.6 Time History Software – Option 831C-LOG
Time-History Measurement System
The Time History can log an abundant selection of
acoustic and non-acoustic metrics at equal time
intervals.
Time Period: Selectable for periods 2.5 ms, 5 ms, 10
ms, 20 ms, 50 ms, 100 ms, 200 ms, 500 ms, 1 s, 2 s, 5 s,
10 s, 15 s, 20 s, 30 s, 1 min, 2 min, 5 min, 10 min, 15 min,
20 min, 30 min, 1 h, and 24 h
Synchronization: Selectable to sync to time-of-day
clock, for periods of 1, 2, 5, 10, 15, 20, 30 seconds; 1, 2,
5, 10, 15, 20, 30 minutes; and 1, 24 hours
Acoustic Measurements
Metrics are individually selectable.
Period < 20 ms:
• OBA 1/1 Leq*
• OBA 1/3 Leq*
Period ≥ 20ms:L , L
Aeq Ceq
Period ≥ 100 ms:
• L , L , L
Aeq Ceq Zeq
• L , L , L , L
AS AF AI CS
A.7 PTB Approved Firmware
In order to be compliant with PTB requirements, the
PTB firmware option and approved firmware must be
installed on the Model 831C SLM. When the option and
approved firmware are installed, an indicator will be
displayed on the status bar indicating the PTB seal is
intact. If any deviation from the PTB approved state is
detected, the indicator will change to show that the
PTB seal has been broken.
Parameters checked:
• 831C-PTB option must not be masked
• NF30-101 option must not be enabled
• PTB approved firmware must be installed
• Must be using a PRM831 or PRM2103
preamp
• Must be using a 377B02 microphone
• Calibration must be within 1.5 dB of the
certified sensitivity
• Microphone corrections must be one of the
following:
• Off
• FF:RI
• FF:RI 2116
• FF:FF 2116
• FF:90 2116
SoundAdvisor Model 831C
, L , L , L , L
Zeq APeak Cpeak Zpeak
, L , L , L
Apeak Cpeak Zpeak
, L , L , L , L , L
CF CI ZS ZF ZI
• L , L
ASmax AFmax
L , L , L
CImax ZSmax
• L , L , L
ASmin AFmin
L , L , L
ZSmin ZFmin
• L -L , L
Ceq Aeq AIeq
Non-Acoustic Measurements
Metrics are individually selectable.
Millisecond Resolution, Period < 1 s: Tms
Period ≥ 100 ms: Battery Voltage, External Power,
Internal Temperature
426A12 or PRM2103 Metrics: Internal Temperature,
Internal Humidity
SEN031 Metrics: Windspeed; Wind Gust Speed; Wind
Direction; Temperature: Avg, Min & Max; Humidity: Avg,
Min & Max; Barometric Pressure
SEN032 Metrics: Windspeed; Wind Gust Speed; Wind
Direction
*OBA processing must be available by option 831C-OB3
and enabled by OBA Bandwidth setting.
The state of these parameters as well as the PTB seal
state are stored in each data file and are viewable on
the summary page of exported data.
PTB approved firmware can only be
TAKE NOTE
installed by an authorized representative.
, L , L , L
AImax CSmax
, L
ZFmax ZImax
, L , L , L
AImin CSmin CFmin
ZImin
-L L
aeq, AFTtm5
,
CFmax
,
CImin
A-20