Spartan 821/721 Manual IEC 61672-1 Section 9.3 B-20
j) Highest Sound Pressure Level
The highest sound pressure level the 821/721 is designed to accommodate at the level of overload is 140 dB.
The maximum peak-to-peak voltage is 28 Vpp input through the adapter, ADP090.
k) Battery Power Voltage Range
The battery power supply voltage range for which the meter conforms to this standard: 4.35 Volts maximum.
The 821/721 powers off when the battery is below 2.85 Volts. Therefore, from 2.85 to 4.35 Volts is the usable
range of battery voltage. The instrument powers off outside this range to ensure 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 821/721 was not measured for field strengths greater than 10 V/m.
n) Radio Frequency Emission
The mode of operation of the 821/721 that produces the greatest radio frequency emission levels is when
charging the battery wirelessly.
o) AC Power and Radio Frequency Susceptibility
The manner of operation for 821/721 that produced the least immunity to the effects of exposure to AC power-
frequency and radio frequency is charging via USB in the vertical position with the screen powered on.
FIGURE B-5 Susceptibility to EM Field
EM
Field
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