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TELEDYNE INSTRUMENTS
Theory of Operation 460L Instruction Manual
54 05228 Rev B
PRINTED DOCUMENTS ARE UNCONTROLLED DCN 5164
The Measurement / Reference Cycle consists of:
Table 10-1 Measurement / Reference Cycle
CYCLE
STATUS
DURATION ACTIVITY
VALVE STATE
(FIG. 10-3)
- - Measure/Reference Valve Opens to the Measure Path.
0.50 sec.
Wait Period. Ensures that the Absorption tube has been adequately
flushed of any previously present gasses.
MEASURE
PERIOD
0.15 sec.
Analyzer measures the average UV light intensity of O
3
bearing
Sample Gas (I) during this period.
1 3
- - Measure/Reference Valve Opens to the Reference Path.
0.50 sec.
Wait Period. Ensures that the Absorption tube has been adequately
flushed of O
3
bearing gas.
REFERENCE
PERIOD
0.15 sec.
Analyzer measures the average UV light intensity of Non-O
3
bearing
Sample Gas (I
0
) during this period.
2 3
1 min 30 sec TOTAL CYCLE TIME
10.1.4. Digital Noise Filter
The 460L software processes sample gas concentration data through a noise filter that stabilizes
the concentration value reported to the display and via the monitor’s analog outputs.