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Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer
Teledyne Analytical Instruments 150
6.15.2.6. Remote Access by Modem
The GFC 7000TA can be connected to a modem for remote access. This requires a cable between the
analyzer’s COM port and the modem, typically a DB-9F to DB-25M cable (available from Teledyne
Instruments with part number WR0000024).
Once the cable has been connected, check to make sure the DTE-DCE is in the correct position. Also
make sure the GFC 7000TA COM port is set for a baud rate that is compatible with the modem, which
needs to operate with an 8-bit word length with one stop bit.
The first step is to turn on the MODEM ENABLE communication mode (Mode 64, Section 6.11.5). Once
this is completed, the appropriate setup command line for your modem can be entered into the analyzer.
The default setting for this feature is
AT Y0 &D0 &H0 &I0 S0=2 &B0 &N6 &M0 E0 Q1 &W0
This string can be altered to match your modem’s initialization and can be up to 100 characters long.
To change this setting press:
SETUP X.X SECONDARY SETUP MENU
COMM VARS DIAG ALRM EXIT
SETUP X.X PRIMARY SETUP MENU
CFG DAS RNGE PASS CLK MORE EXIT
SAMPLE* RANGE = 500.000 PPM CO2 =X.XXX
< TST TST > CAL SETUP
SETUP X.X COM1 MODEM INIT:AT
Y
&D &H
<SET SET> EDIT EXIT
SETUP X.X COM1 MODEM INIT:[A]T Y &D &H
<CH CH> INS DEL [A] ENTR EXIT
SETUP X.X COM1 MODE:0
SET> EDIT EXIT
SETUP X.X COM1 BAUD RATE:19200
<SET SET> EDIT EXIT
ENT
R
accepts the
new string and returns
to the previous menu.
EXIT ignores the new
string and returns to
the previous menu.
<C H and CH
>
move the [ ]
cursor left and right along the
text string
IN
S
inserts a
character before
the cursor location.
Press the [?]
key repeatedly to cycle through the
available character set:
0-9
A-Z
space ’ ~ ! # $ % ^ & * ( ) - _ =
+[ ] { } < >\ | ; : , . / ?
DEL deletes a
character at the
cursor location.
SETUP X.X COMMUNICATIONS MENU
ID INET COM1 COM2 EXIT
EXIT returns to
the previous
menu