Teledyne 3000PA operating instructions Analyze Function, Signal Output

Percent Oxygen Analyzer Operation 4

Press Escape to re-enter the Analyze mode using the fixed range.

NOTE:When performing analysis on a fixed range, if the oxygen concentration rises above the upper limit (or default value) as established by the operator for that particular range, the output saturates at 1 V dc. However, the digital readout and the RS-232 output continue to read the true value of the oxy- gen concentration regardless of the analog output range.

4.7The Analyze Function

Normally, all of the functions automatically switch back to the Analyze function when they have completed their assigned operations. Pressing the Escape button in many cases also switches the analyzer back to the Ana- lyze function. Alternatively, you can press the Analyze button at any time to return to analyzing your sample.

4.8Signal Output

The standard Model 3000PA Percent Oxygen Analyzer is equipped with two 0–1 V dc analog output terminals accessible on the back panel (one concentration and one range ID). The –MA option also has two isolated 4– 20 mA dc current outputs (one concentration and one range ID).

See Rear Panel in Chapter 3, Installation, for illustration.

The signal output for concentration is linear over the currently selected analysis range. For example, if the analyzer is set on range that was defined as 0–10 % O2, then the output would be:

	Voltage Signal	Current Signal
% O2	Output (V dc)	Output (mA dc)
0	0.0	4.0
1	0.1	5.6
2	0.2	7.2
3	0.3	8.8
4	0.4	10.4
5	0.5	12.0
6	0.6	13.6
7	0.7	15.2
8	0.8	16.8
9	0.9	18.4
10	1.0	20.0
	Teledyne Analytical Instruments		4-17