Specifications
A-1
A
A
Specifications
®
CO
2
/H
2
O ANALYZ
ER
Model LI-62
62
READY
ZERO
SPAN
CO
2
ON
OFF
FUNCTION
EEX,
ENTER
↓
↑
4
5
6
7
8
9
C
0
.
2
3
1
ZERO
SPAN
H
2
O
Type:
Differential, non-dispersive infrared gas analyzer. H
2
O or CO
2
channels can be independently configured for operation in either differential
or absolute mode.
Detectors:
Two solid state detectors; one each for CO
2
and H
2
O, filtered at
4.26 and 2.59 microns, respectively.
Chopping Frequency:
500 hertz.
Source:
Single source; lifetime >10,000 hours.
Optical Bench:
One optical bench. Sample cell size: 0.6 H
×
1.3 D
×
15.2
cm L (0.25"
×
0.5"
×
6.0"). Volume: 11.9 cm
3
.
Resolution:
High resolution and sensitivity provided via 16-bit analog-to-
digital converter and user selectable signal averaging time (up to 30 seconds,
set in 1 second increments). See individual specifications for CO
2
and H
2
O.
Warm-up Time:
5 minutes.
Gas Temperature:
Measured by a thermistor. Accuracy:
±
0.5
°
C, 0-60
°
C. Resolution: 0.01
°
C.
Gas Pressure:
Maximum allowable pressure is 17 kPa.
Maximum Flow through Analyzer:
10 liters/minute.
Software Features:
Setup of parameters, scaling of analog outputs, signal
averaging time, selection of RS-232C output parameters, selection of
automatic output of data, external control of software via the RS-232C port.
Program Memory: 32K ROM. System parameters (user entered) stored in
EEPROM. 8K bytes RAM.
Display:
2 line by 16 character backlit LCD with enlarged characters.
Back panel connections:
Analog:
Two channels, each having 100 mV, 5V, and 20 mA full scale,
12 bit D/A; The full range reading can be scaled within these output
ranges (e.g. a full range of 350 ppm over 100 mV full scale).
RS-232C:
Software selectable parameters (baud rates up to 9600, stop
bits, parity, check XON/XOFF).
Non-linear:
CO
2
: 0-7500 mV for 0 to 3000 ppm, typical.
±
15,000 mV maximum.
H
2
O: 0-4000 mV for 0 to 75 mmol/mol, typical
±
15,000 mV maximum.
Auxiliary Input/Output Channel:
0-4096 mV.
