Appendix B. Specifications
General
Output rate: Up to 2 measurements per second
Response time (T90)
CO
2
: <3.5 seconds from 0 to 375 ppm
H
2
O (LI-850 only): <3.5 seconds from 0 to 21 mmol mol
-1
Measurement principle: Non-Dispersive Infrared
Traceability
CO
2
: Traceable gases to WMO standards from 0 to 3,000 ppm; traceable gases
to EPA protocol gases from 3,000 to 20,000 ppm
H
2
O (LI-850 only): NIST traceable LI-610 Portable Dew Point Generator
Pressure compensation range: 50 to 110 kPa
Maximum gas flow rate: 1 liter min
-1
Output signals: Two analog voltage (0 to 2.5 V or 0 to 5 V) and two current (4 to
20 mA)
Digital outputs: TTL (0 to 5 V) or Open Collector
DAC resolution: 16 bits across user-specified range
Power requirements
Input voltage: 12-30 VDC
After warmup (without pump): 0.3 A @ 12 VDC (3.6 W) average
After warmup (with pump): 0.4 A @ 12 VDC (4.6 W) average
During warmup: 1.2 A @ 12 VDC (14 W) maximum
Operating temperature range: -20 to 45 °C
Relative humidity range: 0 to 95% RH, Non-condensing
Dimensions: 22.23 cm W × 15.25 cm D × 7.62 cm H
Weight
No pump, no display: 1.0 kg
No pump, with display: 1.02 kg
With pump, no display: 1.3 kg
With pump, with display: 1.32 kg
Internal optical cell volume: 14.5 mL
Pump specifications (optional)
Operating temperature range: 5 to 45 °C
Storage temperature range: -20 to 60 °C
Operating humidity range: 0 to 80% RH
Nominal flow rate: 0.75 liters minute
-1
Power consumption: <0.75 W
Expected life span: 8,000 hrs in standard conditions with a normal load
B-2 Using the LI-830 and LI-850 Gas Analyzers
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