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
Содержание LI-830
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