Teledyne GFC 7001EM Setting Hessen Protocol Status Flags, Status Flag Name Default BIT Assignment

Remote Operation Model GFC7001E Carbon Dioxide Analyzer

8.6.7.SETTING HESSEN PROTOCOL STATUS FLAGS

Teledyne’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.
	Teledyne Analytical Instruments				182