Kipp & Zonen CM 11, Инструкция по эксплуатации

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APPENDIX
I
49
APPENDIX I CLASSIFICATION ACCORDING TO WMO GUIDE 1996
Characteristics CM 11
High
quality
Good
quality
Moderat
e quality
ISO 9060 classification
Secondary
standard
First class
Second
class
Response time (95 percent response) 12 s < 15 s < 30 s < 60 s
Zero offset:
(a) Response to 200 W/m
2
net thermal radiation
(ventilated)
(b) Response 5 K/h change
in ambient temperature
<
±
7 W/m
2
(with CV 2)
<
±
2 W/m
2
<
±
7 W/m
2
<
±
2 W/m
2
<
±
15 W/m
2
<
±
4 W/m
2
<
±
30 W/m
2
<
±
8 W/m
2
Resolution (smallest detectable
change)
<
±
1 W/m
2
±
1 W/m
2
±
5 W/m
2
±
10 W/m
2
Stability (change per year, percentage
of full scale)
< 0.5 < 0.8 < 1.5 < 3.0
Directional response of beam radiation
(The range of errors caused by
assuming that the normal incidence
responsivity is valid for all directions
when measuring, from any direction, a
beam radiation whose normal
incidence irradiance is 1000 W/m
2
)
<
±
10 W/m
2
<
±
10 W/m
2
<
±
20 W/m
2
<
±
30 W/m
2
Temperature response (percentage of
maximum due to any change of
ambient temperature within an interval
of 50 K)
< 1
-10
0
C .. +40
0
C
< 2 < 4 < 8
Non-linearity (percentage deviation
from the responsivity at 500 W/m
2
due
to any change of irradiance within the
range 100 to 1000 W/m
2
)
< 0.5 < 0.5 < 1 < 3
Spectral sensitivity (percentage of
deviation of the product of spectral
absorptance and spectral
transmittance from the corresponding
mean within the range of 0.3 to 3
µ
m)
< 2 < 2 < 5 < 10
Tilt response (percentage deviation
from the responsivity at 0
°
tilt,
horizontal, due to change in tilt from 0
°
to 90
°
at 1000 W/m
2
irradiance)
< 0.2 < 0.5 < 2 < 5
Achievable uncertainty, 95 percent
confidence level
Hourly totals
Daily totals
3 %
3 % 3%
2% 8%
5% 20%
10%