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Operating Instructions Model GFC7000TA Carbon Dioxide Analyzer
Teledyne Analytical Instruments 144
The pin assignments for the Status Outputs are:
Table 6-24: Status Output Pin Assignments
OUTPUT # Status Definition Condition
1
SYSTEM OK
On if no faults are present.
2
CONC VALID
On if CO
2
concentration measurement is valid.
If the CO
2
concentration measurement is invalid, this bit is OFF.
3
HIGH RANGE On if unit is in high range of DUAL or AUTO range modes.
4
ZERO CAL
On whenever the instruments zero point is being calibrated.
5
SPAN CAL
On whenever the instruments span point is being calibrated.
6
DIAG MODE
On whenever the instrument is in diagnostic mode.
7
ALARM1
On whenever the measured CO
2
concentration is above the set point for
ALM1
8
ALARM2
On whenever the measured CO
2
concentration is above the set point for
ALM2
D
EMITTER BUS
The emitters of the transistors on pins 1-8 are bused together.
+
DC POWER
+ 5 VDC
Digital Ground
The ground level from the analyzer’s internal DC power supplies.