Interfacing
6-1
6
6
Interfacing
®
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
6.1 General Information
Data can be obtained from the LI-6262 in three ways: 1) from the display;
2) from the RS-232C port; or 3) from one of the analog output channels.
RS-232C Output
Up to 10 different channels can be output (in columnar form) at a user-
specified time interval, or in response to a command (FCT 12). Data are
transmitted as ASCII characters that can be captured with a computer or
printed on a printer. The following communication parameters can be set in
the LI-6262 software (FCT 17):
Baud Rate: 300, 600, 1200, 2400, 4800, or 9600.
Data Bits: 7 or 8
Stop Bits: 1 or 2
Parity: Odd, Even, or None.
Check DTR: Yes, No
Check XON/XOFF: Yes, No
Analog Output
Two linear voltage output channels are provided which have 0-100mV or
0-5V ranges. The signals for these channels can be scaled over any
concentration range in any units (see Section 5.3, FCT 80). The linear
channels are available after digital to analog conversions of any channel
code 22-27, 32-38, or 42.
Two analog channels are also available for the raw CO
2
and H
2
O analyzer
outputs. Electronic filters provide both 0.1 second and 1 second response
times for CO
2
and H
2
O vapor. Units having serial numbers less than IRG3-
422 had 1 and 4 second response times, unless modified by the 6262-01 or
6262-02 option(s).
