Teledyne T802 5.4.2. ANALOG OUTPUT RANGES FOR O2 CONCENTRATION

Teledyne API T802 Paramagnetic O2 Analyzer Operation Manual
71
5.4.2. ANALOG OUTPUT RANGES FOR O2 CONCENTRATION
The analyzer has several active analog output signals accessible through a
connector on the rear panel (see Figure 3-4).
CO
2
CONC RANGE1
Only active if the Optional CO
2
Sensor is installed
A
NALOG OUT
A1 A2 A3 A4
+ - + - + - + -
O
2
concentration
outputs
HIGH range when DUAL
mode is selected
Test Channel
LOW range when DUAL
mode is selected
Figure 5-1: Analog Output Connector Pin Out
All three outputs can be configured either at the factory or by the user for full
scale outputs of 0.1 VDC, 1VDC, 5VDC or 10VDC.
Additionally A1 and A2 may be equipped with optional 0-20 mA current loop
drivers and configured for any current output within that range (e.g. 0-20, 2-20,
4-20, etc.). The user may also adjust the signal level and scaling of the actual
output voltage or current to match the input requirements of the recorder or data
logger (See Section 5.9.5).
The A1 and A2 channels output a signal that is proportional to the O2
concentration of the sample gas. Several modes are available which allow them
to operate independently or be slaved together (See Section 5.4.3).
EXAMPLE:
A1 OUTPUT: Output Signal = 0-5 VDC representing 0-100 % concentration
values
A2 OUTPUT: Output Signal = 0 – 10 VDC representing 0-22 % concentration
values.
Output A3 is only active if the CO2 sensor option is installed. In this case a
signal representing the currently measured CO2 concentration is output on this
channel.
The output, labeled A4 is special. It can be set by the user (See Section 5.9.6) to
output several of the test functions accessible via the <TST TST> menu buttons.
07275B DCN6418