Teledyne Analytical Instruments 3020 M, Руководство по эксплуатации

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Paramagnetic Oxygen Analyzer Operational Theory
Teledyne Analytical Instruments
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The Paramagnetic sensor enclosure for the standard analyzer holds
not only the sensing elements, but the temperature controller electronics,
heating elements, sensor electronics, and preamplifier. The optional 0-
1% analyzer uses a separate PID temperature controller and oven for
controlling the thermal environment within the sensor housing.
The electronics and heating elements require a separate power
source, from the rest of the 3020M capable of delivering 1.5 amps
approximately at 24 volts DC. The output of the sensor is roughly
calibrated to be 0 to 1 volt DC for the range of 0 to 100% O
2
. The true
calibration of the sensor is carried out by the microprocessor as
described later in Chapter 4, The electrical interconnections to the sensor
are done through a 15 pin D connector on the standard sensor or a 16 pin
connector for the 0-1% sensor. Some signals from the sensor are not
connected. They are only useful for troubleshooting, by trained
personnel, as test points.
Figure 2-2: Sensor (rear view shown)
Pin out (Standard Version):
1 -15VDC test pin (not connected)
2 +15 VDCtest pin (not connected)
3 Measuring ground
4 Not used
5 Preamplifier output —0- 1 VDC
6 Not used
7 24 VDC return, power ground
8 Collector of transistor switching heating element (not connected)
9 Fault signal: <0 VDC = OK, >4.6 VDC = Fault (not connected)