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357BRemote Operation Of The M400E M400E Ozone Analyzer Operator’s Manual
8.5.5. 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 8-7: 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 HESSEN RESPONSE MODE:CMD
<SET SET> EDIT EXIT
SETUP X.X COMMUNICATIONS MENU
ID HESN COM1 COM2 EXIT
SETUP X.X HESSEN VARIATION:TYPE1
<SET SET> EDIT EXIT
SETUP X.X PRIMARY SETUP MENU
CFG DAS RNGE PASS CLK MORE EXIT
SAMPLE RANGE=500.0 PPB O3= XXXX
<TST TST> CAL SETUP
SETUP X.X SECONDARY SETUP MENU
COMM VARS DIAG EXIT
SETUP X.X HESSEN VARIATION:TYPE1
BCC TEXT CMD ENTR EXIT
EXIT discards the new
setting
ENTR accepts the
new setting
Use these keys to
choose the Hessen
Response type.
Continue pressing NEXT until ...
142 04315 Rev. C1