Campbell Scientific EC155 CO2 and H2O Closed-Path Gas Analyzer and EC100 Electronics with Optional CSAT3A 3D Sonic Anemometer User Manual
Page 14
EC155 CO
2
and H
2
O Closed-Path Gas Analyzer
Factory calibrated range
CO
2
:
0 to 1000 µmol·mol
-1
H
2
O:
0 mmol·mol
-1
to 37
o
C dewpoint
Analyzer temp:
-30
o
to 50
o
C
Baro pressure:
70 to 106 kPa
CO
2
performance
Zero max drift
3
:
±0.55 mg·m
-3
·°C
-1
(±0.3 μmol·mol·°C
-1
)
Gain Drift:
±0.1% of reading·°C
-1
(maximum)
Sensitivity to H
2
O:
±5.6 x 10
-5
µmol CO
2
·mol
-1
H
2
O (max)
H
2
O performance
Zero max drift
3
:
±0.037 g·m
-3
·°C
-1
(±0.05 mmol·mol
-1
·°C
-1
)
Gain Drift:
±0.3% of reading·°C
-1
(maximum)
Sensitivity to CO
2
:
±0.05 mol H
2
O·mol
-1
CO
2
(maximum)
CSAT3A sonic measurement precision
4
u
x
:
1 mm·s
-1
u
y
:
1 mm·s
-1
u
z
:
0.5 mm·s
-1
Sonic temperature:
0.025
o
C
CSAT3A sonic accuracy
5
Offset error
u
x
, u
y
:
< ±8 cm·s
-1
u
z
:
< 4 cm·s
-1
Gain error
Wind vector ±5° horizontal: < ±2% of reading
Wind vector ±10° horizontal: < ±3% of reading
Wind vector ±20° horizontal: < ±6% of reading
CSAT3A sonic reporting range
Full scale wind:
±65.553 m/s
Sonic temperature:
-50° to +60°C
Sample cell sensors
6
Barometer
Basic barometer
Accuracy
-30 to 0°C:
±3.7 kPa at -30°C, falling linearly to ±1.5
kPa at 0
o
C
0° to 50°C:
±1.5 kPa
Measurement rate: 10 Hz
Optional enhanced barometer:
Manufacturer:
Vaisala
Model:
PTB110
Accuracy
-30 to 0°C:
±0.15 kPa
Measurement rate: 1 Hz
Temperature sensor:
Manufacturer: BetaTherm
Model:
100K6A1A Thermistor
Accuracy:
±0.15
o
C (-30
o
to 50
o
C)
4