Teledyne T802 Uživatelský manuál stáhnout pdf (Strana 72)

Section II Operating Instructions Teledyne API T802 Paramagnetic O

Analyzer Operation Manual

5.4. SETUP  RNGE: ANALOG OUTPUT REPORTING RANGE

CONFIGURATION

5.4.1. PHYSICAL RANGE VERSUS ANALOG OUTPUT REPORTING

RANGES

Functionally, the T802 analyzers have one hardware PHYSICAL RANGE that is

capable of determining O

concentrations from 0.00 % to 100.00 %.

This architecture improves reliability and accuracy by avoiding the need for

extra, switchable, gain-amplification circuitry. Once properly calibrated, the

analyzer’s front panel will accurately report concentrations along the entire span

of its physical range.

Because many applications use only a small part of the analyzer’s full physical

range, data resolution problems can occur for most analog recording devices. For

example, in a typical application where a T802 is being used to measure

atmospheric O

concentration, the full scale of expected values is only 21% of the

instrument’s full measurement range. Unmodified, the corresponding output

signal would also be recorded across only 21% of the range of the recording

device.

The T802 analyzers solve this problem by allowing the user to select a scaled

reporting range for the analog outputs that only includes that portion of the

physical range relevant to the specific application.

Only this REPORTING RANGE of the analog outputs is scaled, the physical

range of the analyzer and the readings displayed on the front panel remain

unaltered.

Note

Both the DAS values stored in the CPU’s memory and the concentration

values reported on the front panel are unaffected by the settings chosen for

the reporting range(s) of the instrument.

07275B DCN6418

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Teledyne T802 Uživatelský manuál Strana 72