Teledyne API T802 Paramagnetic O2 Analyzer Operation Manual
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STATUS
1 2 3 4 5 6 7
8
D
+
SYSTEM OK
CONC VALID
CAL MODE
SPAN CAL
CAL MODE – RA NGE 2
Optional CO
2
CAL
Figure 3-9: Status Output Connector
Table 3-6: Status Output Signals
Rear Panel
Label Status Definition Condition
1 SYSTEM OK ON if no faults are present.
2 CONC VALID
OFF any time the HOLD OFF feature is active, such as during calibration or when
any faults exist invalidating the O2 measurement.
ON if concentration measurement is valid.
3 CAL MODE ON whenever the instrument is being calibrated. The Mode field
4 SPAN CAL ON whenever the instrument’s SPAN point is being calibrated.
5 RANGE2 CAL ON if unit is in high range of either the DUAL or AUTO range modes.
6 CO2 CAL If this analyzer is equipped with an optional CO2 sensor, this Output is ON when that
sensor is in calibration mode. Otherwise this output us unused.
7 & 8 SPARE
D EMITTER BUS The emitters of the transistors on Pins 1-8 are bussed together.
+ DC POWER + 5 VDC, 300 mA source (combined rating with Control Output, if used).
Digital Ground The ground level from the analyzer’s internal DC power supplies

3.3.1.6. CONNECTING THE CONTROL INPUTS

If you wish to use the analyzer to remotely activate the zero and span calibration

modes, several digital control inputs are provided through a 10-pin connector

labeled CONTROL IN on the analyzer’s rear panel.

There are two methods for energizing the control inputs. The internal +5V

available from the pin labeled “+” is the most convenient method (Figure 3-10,

left). However, if full isolation is required, an external 5 VDC power supply

should be used (Figure 3-10, right).

07275B DCN6418