Teledyne 3000ZA operating instructions Analyze Function, Signal Output

Trace Oxygen Analyzer Operation

as established by the operator for that particular range, the output saturates at 1 VDC(or 20 mA). However, the digital readout and the RS-232 output continue to read the true value of the oxygen concentration regardless of the analog output range.

4.7 The 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 Analyze function. Alternatively, you can press the Analyze button at any time to return to analyzing your sample.

4.8 Signal Output

The standard Model 3000ZA Trace Oxygen Analyzer is equipped with two 0–1 VDC analog output terminals accessible on the back panel (one concentration and one range ID), and two isolated 4–20 mA DC current outputs (one concentration and one range ID).

See Rear Panel in Chapter 3, Installation for connection details.

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 0–100 ppm O2, then the output would be:

Table 4-1: Output Signals

	Voltage Signal	Current Signal
ppm O2	Output (VDC)	Output (mA DC)
0	0.0	4.0
10	0.1	5.6
20	0.2	7.2
30	0.3	8.8
40	0.4	10.4
50	0.5	12.0
60	0.6	13.6
70	0.7	15.2

Teledyne Analytical Instruments 49