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Teledyne API
6.5.2.8. SETTING HESSEN PROTOCOL STATUS FLAGS
SAMPLE FLOW WARNING
INVALID CONC
(The instrument's front panel display will show the
concentration as "Warnings")
In MANUAL Calibration Mode
In O
2
In CO
In O
2
In CO
UGM
MGM
PPB
PPM
SPARE/UNUSED BITS
BOX TEMP WARNING
O2 CELL TEMP WARN
CO2 CELL TEMP WARN
SAMPLE PRESS WARN
RELAY BOARD WARN
CANNOT DYN SPAN
CANNOT DYN ZERO
O2
CONC ALARM 1
1
These status flags are standard for all instruments and should probably not be
modified.
2
Only applicable if the analyzer is equipped with an alarm option.
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.
4
While these units are assigned flags, they are not applicable in the T802 which
reports in % when measuring O
07275B DCN6418
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
WARNING FLAGS
OPERATIONAL FLAGS
3
ZERO Calibration Mode
3
ZERO Calibration Mode
2
3
SPAN Calibration Mode
3
SPAN Calibration Mode
2
UNITS OF MEASURE FLAGS
UNASSIGNED FLAGS (0000)
2
T802 Paramagnetic O
1
1
4
0008, 0010 0020, 0040,
O2
CONC ALARM 2
ANALOG CAL WARNING
CAL MP O2
CAL MP CO2
REAR BOARD NOT DET
SYSTEM RESET
CO2
CONC ALARM 1
CO2
CONC ALARM 2
and when reporting CO
.
2
2
Analyzer Operation Manual
2
DEFAULT BIT
ASSIGNMENT
0001
0080
0200
0400
0400
0800
0800
0000
2000
4000
6000
0001, 0002, 0004,
0100, 1000, 8000
2
2
2
135
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