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Communications Setup and Operation T400 Ozone Analyzer Operator’s Manual
152
6.7.8. SETTING HESSEN PROTOCOL STATUS FLAGS
Teledyne API 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 Bit Assignments
STATUS FLAG NAME
DEFAULT BIT
ASSIGNMENT
WARNING FLAGS
SAMPLE FLOW WARNING 0001
PHOTO REF WARNING 0002
SAMPLE PRESS WARN 0004
SAMPLE TEMP WARN 0008
O3 GEN REF WARNING
1
0010
O3 GEN LAMP WARNING
1
0020
O3 GEN TEMP WARN
1
0040
2
PHOTO TEMP WARNING 0040
2
OPERATIONAL FLAGS
In MANUAL Calibration Mode 0200
In ZERO Calibration Mode 0400
In SPAN Calibration Mode 0800
2
In LO SPAN Calibration Mode 0800
2
UNITS OF MEASURE FLAGS
UGM 0000
MGM 2000
PPB 4000
PPM 6000
SPARE/UNUSED BITS
0080, 0100,
1000, 8000
UNASSIGNED FLAGS (0000)
LAMP STABIL WARN LAMP DRIVER WARN
O3 SCRUB TEMP WARN
3
ANALOG CAL WARNING
BOX TEMP WARNING CANNOT DYN ZERO
SYSTEM RESET CANNOT DYN SPAN
RELAY BOARD WARNING INVALID CONC
REAR BOARD NOT DETECTED Instrument is in MP CAL mode
Instrument is in MP CAL mode
06870C DCN6332