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Teledyne ML - T100 UV Fluorescence SO2 Analyzer
REAR PANEL
STATUS
LABEL
DEFINITION
1
SYSTEM OK
2
CONC VALID
3
HIGH RANGE
4
ZERO CAL
5
SPAN CAL
6
DIAG MODE
7&8
D
EMITTER BUS
+
DC POWER
Digital Ground
The status outputs are accessed via a 12-pin connector on the analyzer's rear panel
labeled STATUS (Figure 3-9). Pin-outs for this connector are presented in Table 3-7.
1
2
Table 3-7: Status Output Signals
ON if no faults are present.
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.
ON if unit is in high range of either the DUAL or Auto range modes.
ON whenever the instrument's ZERO point is being calibrated.
ON whenever the instrument's SPAN point is being calibrated.
ON whenever the instrument is in DIAGNOSTIC mode
The emitters of the transistors on pins 1-8 are bussed together.
+ 5 VDC, 300 mA source (combined rating with Control Output, if used).
The ground level from the analyzer's internal DC power supplies
STATUS
3
4
5
6
7
Figure 3-9: Status Output Connector
CONDITION
SPARE
SPARE
+
8
D
Getting Started
47
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