Teledyne M300EM Setting Hessen Protocol Status Flags, 8:Default Hessen Status Flag Assignments

Remote Operation Teledyne API – Technical Manual - Model 300E Family CO Analyzers

8.6.7.SETTING HESSEN PROTOCOL STATUS FLAGS

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 8-8: Default Hessen Status Flag Assignments

STATUS FLAG NAME	DEFAULT BIT
	ASSIGNMENT
WARNING FLAGS

SAMPLE FLOW WARNING	0001
BENCH TEMP WARNING	0002
SOURCE WARNING	0004
BOX TEMP WARNING	0008
WHEEL TEMP WARNING	0010
SAMPLE TEMP WARN	0020
SAMPLE PRESS WARN	0040
INVALID CONC	0080
(The Instrument’s Front Panel Display Will Show The
Concentration As “Warnings”)
OPERATIONAL FLAGS1
Instrument OFF	0100
In MANUAL Calibration Mode	0200
In ZERO Calibration Mode4	0400
In O2 Calibration Mode (if O2 sensor installed )2,4	0400
In CO2 Calibration Mode (if CO2 sensor installed )2,4	0400
In SPAN Calibration Mode	0800
UNITS OF MEASURE FLAGS
UGM	0000
MGM	2000
PPB	4000
PPM	6000
SPARE/UNUSED BITS	1000, 8000

		UNASSIGNED FLAGS (0000)
AZERO WARN2			DCPS WARNING
CANNOT DYN SPAN2			REAR BOARD NOT DET
CANNOT DYN ZERO3			SYNC WARNING1
CONC ALARM 13			SYSTEM RESET1
CONC ALARM 23
1	These status flags are standard for all instruments and should probably not be
2	modified.
	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.

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