1.4 System components
The basic XMO2 measurement system consists of
an XMO2 Transmitter mounted in a Sample System.
The sample system is mandatory, and can either be
provided by Panametrics or constructed according to our
recommendations.
1.4.1 The XMO2 transmitter
The XMO2 transmitter is self-contained, consisting of the
oxygen sensor and associated electronics. It requires a
24 VDC power input @1.2 A maximum at power-up, and it
provides a 4-20 mA analog output signal that is proportional
to the oxygen concentration of the sample gas and has fully
programmable zero and span points. Also provided is an
RS232 digital output for oxygen concentration, background
gas, and atmospheric pressure signals. Programming,
and calibration of the unit may also be performed via this
interface.
All XMO2 transmitters include a 10 ft (3 m), 4-conductor
cable for connecting the power input and the 4-20 mA
analog output. Optional XMO2 accessories available from
Panametrics include:
• Power/analog output cable lengths of up to 450 ft (150 m)
• 24 VDC power supply (Model PS5R-C24)
• 3-conductor cable with a DB9 (male or female) or DB25
(male or female) connector for connecting the XMO2
RS232 digital output to external devices
The XMO2 is designed to be installed in a sample system as
close as possible to the process sample point. It is available
in two environmental packages:
• Weatherproof
• Explosion-proof/Flameproof (with gas inlet and outlet
flame arrestors)
Figure 4: The XMO2 transmitter
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