Larson Davis SoundAdvisor 831C Reference Manual page 202

k) Battery Power Voltage Range
The battery power supply voltage range for which the 831C conforms to this standard:
16.8 Volts maximum
The 831C will shut down if the battery is below 4.0 Volts when used with alkaline batteries. Therefore
from 4.0 to 16.8 Volts is the usable range of battery voltage. The instrument will shut off to ensure that
no data is taken that would not meet the requirements of IEC 61672.
l) Typical Stabilization Time
The typical time interval needed to stabilize after changes in environmental conditions:
For a temperature change of 5 °C then 30 minutes are required.
For a static pressure change of 5 kPa then 15 seconds are required.
For a humidity change of 25% (non-condensing) then 30 minutes are required.
m) Field Strength > 10 V/m
The 831C was not measured for field strengths greater than 10 V/m.
n) Radio Frequency Emission
The mode of operation of the 831C that produces the greatest radio frequency emission levels is with the
831C set to run with the LCD backlights on, an external charger (PSAA20R-120 charger), Ethernet dongle,
and USB cable attached and with an EXC020 (20' microphone extension cable) between the PRM831 and
meter.
o) AC Power and Radio Frequency Susceptibility
The mode of operation of the 831C that produced the least immunity to the effects of exposure to AC
power-frequency and radio frequency field is with the 831C set to run with the LCD backlights on, an
external charger (PSAA20R-120 charger), Ethernet dongle, and USB cable attached and with an EXC020
(20' microphone extension cable) between the PRM831 and meter.
FIGURE B-2 EM Field Orientation
SoundAdvisor Model 831C
EM Field
Principal
Direction
B-7