Environmental
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LI-7000 Specifications
Type: Differential, non-dispersive infrared gas analyzer.
Detectors: Two solid state detectors; one each for CO2 and H2O, filtered at 4.255 and 2.595 microns, respectively.
Chopping Frequency: 600 hertz.
Source: Single source, lifetime > 20000 hours.
Optical Bench: One optical bench. Sample cell size: 9.53 mm Dia. x 152.4 mm L (3/8" x 6"). Volume: 10.86 cm3.
Warm-up Time: Approximately 2 minutes to operation; 2 hours to temperature equilibration.
Gas Pressure: Maximum allowable pressure is 115 kPa (17 psi) with pressure sensor connected. 200 kPa (29 psi) max. w/o pressure sensor connected.
Maximum Flow through Analyzer: >50 liters/min.
Internal Pump: Yes
Display: 40 character x 8 line backlit LCD. 3 numeric screens available.
Graphing: 3 graphing screens available with 1-3 graphs per screen.
Back Panel Connections:
Analog: 4 user-scalable 14 bit DACs, 600 Hz update frequency.
RS-232: 9600-115200 baud, 8, N, 1. Supports XON/XOFF and trigger input.
USB: 2.0 compliant. PC must be running Windows® 2000 or XP to support USB connectivity.
Auxiliary Input Channels: 2, ±2.5V, 10 Hz bandwidth.
Tubing Connections: Swagelok.
Power Requirements: 100-240 VAC, 50-60 Hz, or 10.5-16 VDC, 4 amp max.
Power Consumption: 15-40Watts DC (dependent on temperature and pump usage).
Temperature Range: 0-50 °C ambient, 0-55 °C bench.
Size: 5" H x 9.875" D x 14.5" L (12.7 x 25 x 36.8 cm).
Weight: 19.4 lbs. (8.8 kg).
CO2 Analyzer Specifications
Range: 0-3000 ppm.
Accuracy: 1% nominal.
Zero Drift (with temperature): ±0.3 ppm/°C.
Span Drift: ±0.2% of reading/°C.
Water Sensitivity: <0.1 ppm CO2/mmol/mol H2O (Software algorithm corrects for band broadening effects).
Calibration: Factory linearization over 0-3000 ppm range using NIST-traceable standard gases.
Pressure Range: 0 to 115 kPa absolute.
Accuracy: 1% nominal.
Display Resolution: 0.01 µmol/mol.
Signal Noise: See Table 1.
H2O Analyzer Specifications
Range: 0-60 mmol/mol. Optical bench and interconnecting hoses must be maintained above the dewpoint temperature by the user.
Accuracy: 1%.
Zero Drift: ±0.02 mmol/mol/°C.
Span Drift: ±0.4% of reading/°C.
Signal Noise: See Table 1.
Table 1. Noise Specifications
*Specifications subject to change without notice
