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Getting Started Teledyne API - T100 UV Fluorescence SO2 Analyzer
48
Table 3-7: 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
other faults exist possibly invalidating the current concentration measurement
(example: sample flow rate is outside of acceptable limits).
ON if concentration measurement is valid.
3
HIGH RANGE
ON if unit is in high range of either the DUAL or Auto range modes.
4
ZERO CAL ON whenever the instrument’s ZERO point is being calibrated.
5
SPAN CAL ON whenever the instrument’s SPAN point is being calibrated.
6
DIAG MODE ON whenever the instrument is in DIAGNOSTIC mode
7&8
SPARE
D
EMITTER BUS
The emitters of the transistors on pins 1-8 are bussed together.
SPARE
+
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. However, if full isolation is
required, an external 5 VDC power supply should be used.
06807C DCN6650