Carmanah M650H, Руководство пользователя

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© 2014, Carmanah Technologies Corporation. June 2014. 61249_M650H_User_Manual_RevC
M650H USER MANUAL
75
RANGE (NM) EFFECTIVE INTENSITY (cd)
T = 0.74 T = 0.85
4.3 46 26
4.4 50 27
4.5 54 29
4.6 58 31
4.7 62 33
4.8 67 34
4.9 72 37
5.0 77 39
5.1 83 41
5.2 89 43
5.3 95 46
5.4 102 48
5.5 109 51
5.6 116 53
5.7 124 56
5.8 132 59
5.9 141 62
6.0 150 65
6.1 160 69
6.2 171 72
6.3 181 76
6.4 193 80
6.5 205 83
6.6 218 87
6.7 232 91
6.8 246 96
6.9 261 100
7.0 277 105
Effective Intensity
The effective intensity of a flashing lantern comes
from the following calculation known as Schmidt-
Clausen or Blondel-Rey documented in IALA
Recommendations E-122 (2001) and E-200-4
(2008). This method is valid for the rectangular,
non-fluctuating flash profiles below the flicker fusion
frequency (60 Hz) used by Carmanah lanterns.
I
e
=
I
p
x F
C + F
I
e
= effective intensity (cd)
I
p
= peak intensity (cd)
C = visual time constant (s)
F = flash duration (s)
The visual time constant is 0.2 s for a lantern at night-
time.