5
Specification (for microphone sensitivity 12.5mV/Pa):
•
Accuracy class
2
•
Frequency weightings
A, C
•
Time weightings
SLOW, FAST
•
Readout resolution:
-
measure
0.1dB
-
calibration
0.01dB
•
Maximum value of sound pressure,
causing no damage to the meter
150dB
•
Maximum unweighted sound pressure level
causing no activating of overload indicator
137.9dB
•
Maximum electrical signal value causing no
damage to the instrument (applied using electrical
input facility)
5.34V
p-p
•
The way of insert electrical signals into the meter
input
directly from the generator with
internal impedance
≤
600
Ω
•
Reference conditions
-
type of sound field
free
-
reference frequency
1000Hz
-
reference sound pressure level
94dB
-
reference level range
40 - 135dB
-
sampling frequency
41.7kHz
-
microphone reference direction
microphone symmetry axis
-
microphone reference point
microphone diaphragm centre
-
reference orientation
sound wave arriving from
reference direction
-
reference temperature
+23°C
-
reference humidity
50%
-
reference static pressure
101.325kPa
•
Starting point at which to begin tests of level
linearity deviation on the reference level range
reference sound pressure level
•
Permissible error for sinusoidal reference signal
(progressive sound wave incident perpendicularly
to microphone diaphragm, 94dB, 1000Hz)
≤
±
1.0dB
•
Total range for L
A
sound level and L
Aeq
time-average sound level)
40 – 135dBA
•
Measuring ranges at specified frequencies for sound level (L) and time-average sound
level (L
eq
)
31.5Hz
1kHz
4kHz
8kHz
A
40-98dBA
40-135dBA
40-137dBA
40-135dBA
C
45-135dBC
45-135dBC
45-135dBC
45-135dBC
•
Total range for L
CPk
peak sound level
50 – 138dBC
•
Self-generated noise
without microphone
with MK-401 microphone
A
≤
19dB
≤
35dB
C
≤
20dB
≤
43dB
•
Measurement duration with 1s resolution
999 hours 59 minutes 59 seconds
•
Warm-up time
-
after turn-on
1 minute
-
after environmental conditions change
15 minutes
•
Power supply
-
internal battery
Li-ION 7.2V 700mAh
-
charger
6WZS 12/400 (Tatarek)
•
Minimum operating voltage of internal battery
6.6V
