The XMO2 transmitter, which is shown in Figure 4 on page 4,
can be configured for the following standard oxygen ranges:
0 to 1% 0 to 25%
0 to 2% 0 to 50%*
0 to 5% 0 to 100%*
0 to 10% 80 to 100%*
0 to 21% 90 to 100%*
*Pressure compensation is required
The standard XMO2 transmitter maintains the measurement
cell at an operating temperature of 45°C (113°F). An optional
60° (140°F) or 70°C (158°F) cell operating temperature is
available upon request.
Note: The 60° (140°F) or 70°C (158°F) cell operating
temperatures should be selected only when necessary, as
the higher cell operating temperature results in reduced
sensitivity
F1.4.2 The sample system
A sample system is mandatory for use with the XMO2
transmitter. The specific design of the sample system
depends on the conditions of the sample gas and the
requirements of the application. At a minimum, the sample
system should include a sample gas flowmeter and a gas
flow regulator valve.
In general, the sample system must deliver a clean,
representative sample of the gas mixture to the XMO2
transmitter at a temperature, pressure, and flow rate that
are within acceptable limits. The standard XMO2 transmitter
sample gas conditions are as follows:
• -20° to +40°C (-4° to +104°F), at the standard
measurement cell operating temperature of 45°C (113°F)
• Atmospheric pressure
• 1.0 SCFH (500 cc/min) flow rate
Panametrics offers sample systems for a wide variety of
applications. A typical sample system for use with the XMO2
transmitter is shown in Chapter 2, Installation. For assistance
in designing your own sample system, please consult the
factory.
IMPORTANT:
ATEX compliance requires both:
• Fast Response calibration of the XMO2 transmitter.
• Pressure Compensation of the XMO2 or constant control
of the sample system pressure.
1.4.3 Long cables (optional)
Panametrics provides a standard 10 ft (3 m), 4-conductor,
color-coded cable with each XMO2 to connect to the power
input and the analog output. Optional cables are available
in lengths up to 450 ft (150 m) as P/N X4(*), where * specifies
the length in feet. For longer cables or to use your own cable,
refer to Chapter 2, Installation, for recommendations.
1.4.4 Power supply (optional)
The XMO2 requires 24 VDC input power at a maximum start-
up current of 1.2 A. The Panametrics PS5R-C24 power supply
may be used to convert 100-240 VAC to the required 24 VDC.
1.4.5 The TMO2D display/controller (optional)
The Panametrics TMO2D Display/Controller provides a two-
line x 24-character back-lit LCD display for the XMO2’s 4-20
mA analog output signal. It also permits display and option
programming via its keyboard. Additional features include:
recorder outputs, a real time clock, alarm relays, and relays
for driving sample system solenoids for automatic zero and
span calibration. For more information on the TMO2D, please
contact Panametrics.
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