Setting Hessen Protocol Status Flags; Table 6-6: Default Hessen Status Flag Assignments - Teledyne T300 Operation Manual

Teledyne API – Model T300/T300M CO Analyzer

6.7.3.4. SETTING HESSEN PROTOCOL STATUS FLAGS

06864B DCN6314
Teledyne API's implementation of Hessen protocols includes a set of status bits that the
instrument includes in responses to inform the host computer of its condition. Each bit
can be assigned to one operational and warning message flag. The default settings for
these bit/flags are:

Table 6-6: Default Hessen Status Flag Assignments

STATUS FLAG NAME
SAMPLE FLOW WARNING
BENCH TEMP WARNING
SOURCE WARNING
BOX TEMP WARNING
WHEEL TEMP WARNING
SAMPLE TEMP WARN
SAMPLE PRESS WARN
INVALID CONC
(The Instrument's Front Panel Display Will Show The
Concentration As "Warnings")
Instrument OFF
In MANUAL Calibration Mode
In ZERO Calibration Mode
O
In Calibration Mode (if
2
CO
In Calibration Mode (if
2
In SPAN Calibration Mode
UNITS OF MEASURE FLAGS
UGM
MGM
PPB
PPM
SPARE/UNUSED BITS
2
AZERO WARN
2
CANNOT DYN SPAN
3
CANNOT DYN ZERO
3
CONC ALARM 1
3
CONC ALARM 2
1
These status flags are standard for all instruments and should probably not be modified.
2
Only applicable if the optional internal span gas generator is installed.
3
Only applicable if the analyzer is equipped with an alarm options.
3
It is possible to assign more than one flag to the same Hessen status bit. This allows the grouping of
similar flags, such as all temperature warnings, under the same status bit.
Be careful not to assign conflicting flags to the same bit as each status bit will be triggered if any of the
assigned flags is active.
WARNING FLAGS
OPERATIONAL FLAGS
4
2,4
O
sensor installed )
2
2,4
CO
sensor installed )
2
UNASSIGNED FLAGS (0000)
DCPS WARNING
REAR BOARD NOT DET
SYNC WARNING
SYSTEM RESET
Communications Setup and Operation
DEFAULT BIT ASSIGNMENT
0001
0002
0004
0008
0010
0020
0040
0080
1
0100
0200
0400
0400
0400
0800
0000
2000
4000
6000
1000, 8000
1
1
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