Teledyne GFC-7000E - Trace CO2 Analyzer - Manual (Page 137)

Model GFC7000E Instruction Manual Operating Instructions
04584 Rev A1 126
NOTE
While Hessen Protocol Mode can be activated independently for COM1 and COM2, The
TYPE selection affects both Ports.
6.13.4.5. Setting The Hessen Protocol Response Mode
The Teledyne Instruments implementation of Hessen Protocol allows the user to choose one of
several different modes of response for the analyzer.
Table 6-30: Teledyne Instruments Hessen Protocol Response Modes
MODE ID MODE DESCRIPTION
CMD This is the Default Setting. Reponses from the instrument are encoded as the traditional
command format. Style and format of responses depend on exact coding of the initiating
command.
BCC Responses from the instrument are always delimited with <STX> (at the beginning of the
response, <ETX> (at the end of the response followed by a 2 digit Block Check Code
(checksum), regardless of the command encoding.
TEXT Responses from the instrument are always delimited with <CR> at the beginning and the end
of the string, regardless of the command encoding.
To Select a Hessen response mode, press:
SETUP X.X SECONDARY SETUP MENU
COMM VARS DIAG ALRM EXIT
SAMPLE ENTER SETUP PASS : 818
8 1 8 ENTR 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 HESSEN RESPONSE MODE :CMD
<SET SET> EDIT EXIT
SETUP X.X COMMUNICATIONS MENU
ID HESN COM1 COM2 EXIT
SETUP X.X HESSEN VARIATION: TYPE 1
SET> EDIT EXIT
SETUP X.X HESSEN RESPONSE MODE :CMD
BCC TEXT EDIT ENTR EXIT
Press to
change
response
mode.
ENTR key accepts the
new settings
EXIT key ignores the
new settings
6.13.4.6. Hessen Protocol Gas ID
The Model GFC7000E Analyzer is a single gas instrument that measures CO
2
. As such it’s default
gas ID has already been set to 310. There is no need to change this setting.