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Máy đo cường độ quang hợp cầm tay
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Máy đo cường độ quang hợp cầm tay

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LI-6400XT Specifications

CO2 Analyzer

Type: Absolute, open-path, non-dispersive infrared gas analyzer.
Range:
0-3000 µmol mol-1.
Bandwidth:
10 Hz.
Signal Noise:
Typically 0.3 µmol mol-1 peak-to-peak at 350 µmol mol-1 with 1 second signal averaging; 0.8 µmol mol -1 maximum. With 4 second signal averaging, signal noise is typically 0.2 µmol mol-1 peak-to-peak.
Accuracy:
Maximum deviation: ± 5 µmol mol-1 from 0 to 1500 µmol mol-1 ± 10 µmol mol-1 from 1500 to 3000 µmol mol-1.
Sensor:
Solid state. Minimal sensitivity to motion.
Orientation Sensitivity:
± 1 µmol mol-1 at 350 µmol mol-1 from any orientation.

H2O Analyzer

Type: Absolute, open-path, non-dispersive infrared gas analyzer.
Range:
0-75 mmol mol-1, or 40 °C dew point.
Bandwidth:
10 Hz.
Signal Noise:
Typically 0.04 mmol mol-1 peak-to-peak at 20 mmol mol-1 with 1 second signal averaging; 0.06 mmol mol-1 maximum. With 4 second signal averaging, signal noise is typically 0.03 mmol mol-1 peak-to-peak.
Accuracy:
Maximum deviation: ± 1.0 mmol mol -1 from 0-75 mmol mol-1.

Temperature

Operating Temperature Range: 0 °C to 50 °C.
Optical Housing Block and Air Temperature:

Sensor Type:
3-wire thermistor.
Range:
-10 to 50 °C.
Accuracy:
Maximum error < ± 0.5 °C.
Typical Error:
< ± 0.25 °C.
Temperature Control:
Leaf chamber can be heated or cooled ± 6 °C from ambient.
Control Range:
0 to 50.0 °C.
Set point Resolution:
0.2 °C.
Leaf Temperature Thermocouple:

Type:
E.
Range:
± 50 °C of reference.
Reference:
Optical housing block thermistor.
Accuracy:
± 10% of Temperature difference between sample and reference junctions with amplifier zeroed; typically < 0.2 °C.

Output

RS-232: Hardwired DTE.
Expansion Slot :
Supports either Compact Flash or Ethernet card adapter.
Compact Flash Card:
Industrial Grade (included)
Ethernet Card Adapter:
Type 1 CF Ethernet card, 10/100 Mbps (included)

Air Flow

Flow rate: 0 to 700 µmol s-1 with 6400-01 CO2 injector and 150 to 1000 µmol s-1 without CO2 injector.

Pressure

Pressure Range: 65 to 110 kPa absolute.
Accuracy:
± 0.1% of full scale.
Resolution:
0.002 kPa.
Signal Noise (peak-to-peak):
0.002 kPa typical.

System Console

Processor: 400 MHz Intel XScale
Memory:
128 MB RAM for operation; 64 MB flash memory for data storage.
Display:
Adjustable contrast, backlit, 8 line x 40 character (240 x 64 dot) LCD graphic display.
Keyboard:
Full ASCII keypad, sealed from dust and moisture with membrane overlay.
Power Requirement:
10.5 to 15 VDC; 4 A maximum (current draw dependent upon system operation). < 10 A momentary peak.

6400-01 CO2 Injector

CO2 Mixing Range: < 50 µmol mol-1 to > 2000 µmol mol-1.
Operating Temperature Range:
0-50 °C.
CO2 Source Assembly:

Type:
12g pure liquid CO2 cylinder.
Lifetime:
8 hours after activation
CO2 Tank Connector Block:

Minimum Pressure:
1250 kPa (180 psig).
Maximum Pressure:
1500 kPa (220 psig).
Usage Rate:
constant at ~10 sccm.

Light Measurement

PAR Internal and External Chamber Sensors:
Range:
0 to > 3000 µmol mol-1.
Resolution:
< 1 µmol mol-1.
Calibration Accuracy:
± 5% of reading, traceable to NIST.

6400-02B LED Light Source

Output Range: 0 to 2000 µmol m-2 s-1 at 30 °C.
Minimum Fraction Blue:
5% (photon basis).
Typical Fraction Blue:
100 µmol m-2 s-1, 13%, 1000 µmol m-2 s-1, 10%, 2000 µmol m-2 s-1, 7%.
Red Peak Wavelength:
665 nm ±10 nm at 25 °C.
Blue Peak Wavelength:
470 nm ±10 nm at 25 °C.
Power Consumption at 2000 µmol m-2 s-1:
8 W.
Operating Temperature Range:
0-50 °C.
Size:
5.2H x 5.6W x 7.3D cm (2.0 x 2.2 x 2.9 in.).
Weight:
0.2 kg (0.44 lb.).

6400-40 Leaf Chamber Fluorometer

Measuring (Modulated) Light: Red LEDs, 630 nm, software controlled intensity, software selectable modulation frequencies of 0.25, 1, 10, and 20 kHz
Actinic Light:
Blue and Red LEDs, 470 and 630 nm, respectively, independent software control of blue and red intensity, 0 to 100 µmol m-2 s -1 PAR for the blue LEDs, 0 to 3000 µmol m-2 s-1 PAR for the red LEDs
Saturation Light:
Red LEDs, 630 nm, software controlled intensity, 0 to 7000 µmol m-2 s -1 PAR
Far-Red Light :
Far-Red LED, 740 nm, software controlled intensity
Fluorescence Signal Temperature Dependence
: < 1% drift with 10 °C change in temperature
User Interface:
LI-6400XT console and remote Windows® interface
F Data Output (Analog):
±5V analog output for external data acquisition
Power Consumption:
< 6W during saturation pulse
Leaf Area:
2.0 cm2
Operating Temperature Range:
0 - 50 °C
Dimensions:
6H x 6W x 8D cm
Weight:
0.4 kg


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