6
•
Operating temperature range
0
÷
+40°C
•
Storage temperature range
-10
÷
+50 °C
•
Operating humidity range
≤
90% (without condensation)
•
Operating static pressure range
65
÷
108kPa
•
Electromagnetic emission
within the limits specified in
EN 61672-1:2002 (maximum
emission when operating with
charger)
•
Dimensions (without microphone)
194 x 81 x 30 mm
•
Continuous operating time (battery fully charged)
16h
•
Weight
400g
•
Nominal corrections for effects of reflection
from instrument case (free field, 0° incidence)
See table below
f [Hz]
250
315
400
500
630
800
1000
1250
1600
2000
2240
dL [dB]
0.01
0.05
0.11
0.12
0.40
0.17
0.01
-0.22
-0.23
-0.01
0.22
U [dB]
≤
0.10
f [Hz]
2500
2800
3150
3550
4000
4500
5000
5600
6300
7100
8000
dL [dB]
0.24
-0.53
0.27
0.23
-0.34
0.31
0.18
-0.47
0.37
0.03
-0.02
U [dB]
≤
0.12
f [Hz]
8500
9000
9500 10000 10600 11200 11800 12500 13200 14000 15000
dL [dB]
0.00
-0.33
-0.29
0.28
0.39
-0.27
0.01
-0.41
0.37
-0.18
0.26
U [dB]
≤
0.12
≤
0.17
f [Hz]
16000 17000 18000 19000 20000
dL [dB]
0.38
-0.30
-0.30
-0.08
-0.26
U [dB]
≤
0.17
•
Differences between MK-401 microphone free
field frequency response at 0° incidence and
multi-frequency acoustic calibrator response;
expanded (k=2) uncertainty of the determination
of these differences:
See table below and Fig. 1.3.
f [Hz]
250
315
400
500
630
800
1000
1250
1600
2000
2240
dL [dB]
0.00
0.01
0.03
0.04
0.00
0.07
0.07
0.12
0.09
-0.03
0.06
U [dB]
≤
0.25
f [Hz]
2500
2800
3150
3550
4000
4500
5000
5600
6300
7100
8000
dL [dB]
-0.02
-0.06
-0.03
0.09
0.15
0.18
0.18
0.35
0.41
0.54
0.36
U [dB]
≤
0.25
≤
0.45
f [Hz]
8500
9000
9500 10000 10600 11200 11800 12500 13200 14000 15000
dL [dB]
0.67
0.79
0.81
0.76
0.78
0.95
1.37
1.73
1.61
1.84
2.56
U [dB]
≤
0.45
≤
0.58
f [Hz]
16000 17000 18000 19000 20000
dL [dB]
2.78
3.12
3.54
4.08
4.10
U [dB]
≤
0.58