Teledyne 3010TB, Operating Instructions Manual

Page: 21 / 102

Oxygen Analyzer Part I: Control Unit
Part I: 3-5
Teledyne Analytical Instruments
4–20 mA dc % Range: (-M Option) Current increases linearly with increas-
ing oxygen, from 4 mA at 0% to 20 mA at full scale
100%. (Full scale = 100% of programmed range.)
4–20 mA dc Range ID: (-M Option) 8 mA = Low Range, 12 mA = Me-
dium Range, 16 mA = High Range, 20 mA = Air
Cal Range.
Figure 3-5: Analog Output Connections
Examples:
The analog output signal has a voltage which depends on the oxygen
concentration AND the currently activated analysis range. To relate the
signal output to the actual concentration, it is necessary to know what range
the instrument is currently on, especially when the analyzer is in the
autoranging mode.
The signaloutput for concentration is linear over currently selected
analysis range. For example, if the analyzer is set on a range that was
defined as )-10 % O2, then the output would be as shown in Table 3-1.
Table 3-1: Analog Concentration Output-Examples