Panametrics XMO2 User manual

XMO2-IDM
User’s manual
910-141 Rev. G

ATTENTION! This manual should be used only for XMO2 units with
the IDM User Program (Option D = 3 or 4).
For XMO2 units with the Terminal User Program (Option D = 1 or 2),
manual number 910-141A must be used.
ii

XMO2-IDM
Oxygen analyzer
User’s manual
910-141 Rev. G
March 2015
iii

[no content intended for this page]
iv

Information paragraphs
Note: These paragraphs provide information that provides a
deeper understanding of the situation, but is not essential to
the proper completion of the instructions.
IMPORTANT:
These paragraphs provide information that emphasizes
instructions that are essential to proper setup of the
equipment. Failure to follow these instructions carefully may
cause unreliable performance.
CAUTION!
This symbol indicates a risk of potential minor
personal injury and/or severe damage to
the equipment, unless these instructions are
followed carefully.
WARNING!
WARNING! This symbol indicates a risk of
potential serious personal injury, unless these
instructions are followed carefully.
Safety issues
WARNING!
It is the responsibility of the user to make sure
all local, county, state and national codes,
regulations, rules and laws related to safety
and safe operating conditions are met for
each installation.
Auxiliary equipment
Local safety standards
The user must make sure that he operates all auxiliary
equipment in accordance with local codes, standards,
regulations, or laws applicable to safety.
Working area
WARNING!
Auxiliary equipment may have both manual
and automatic modes of operation. As
equipment can move suddenly and without
warning, do not enter the work cell of this
equipment during automatic operation,
and do not enter the work envelope of this
equipment during manual operation. If you
do, serious injury can result.
WARNING!
Make sure that power to the auxiliary
equipment is turned OFF and locked out
before you perform maintenance procedures
on the equipment.
Qualification of personnel
Make sure that all personnel have manufacturer-approved
training applicable to the auxiliary equipment.
Personal safety equipment
Make sure that operators and maintenance personnel have
all safety equipment applicable to the auxiliary equipment.
Examples include safety glasses, protective headgear,
safety shoes, etc.
Unauthorized operation
Make sure that unauthorized personnel cannot gain access
to the operation of the equipment.
Environmental compliance
Waste Electrical and Electronic Equipment (WEEE) directive
Panametrics is an active participant in Europe’s Waste
Electrical and Electronic Equipment (WEEE) take-back
initiative, directive 2012/19/EU.
The equipment that you bought has required the extraction
and use of natural resources for its production. It may
contain hazardous substances that could impact health
and the environment.
In order to avoid the dissemination of those substances in
our environment and to diminish the pressure on the natural
resources, we encourage you to use the appropriate take-
back systems. Those systems will reuse or recycle most of
the materials of your end life equipment in a sound way.
The crossed-out wheeled bin symbol invites you to use
those systems.
If you need more information on the collection, reuse and
recycling systems, please contact your local or regional
waste administration.
Visit https://www.bakerhughesds.com/health-safetyand-
environment-hse for take-back instructions and more
information about this initiative.
v

Contents
Information paragraphs ..............................................................................v
Safety issues .........................................................................................v
Auxiliary equipment ..................................................................................v
Environmental compliance ...........................................................................v
Chapter 1. Features and capabilities .....................................................1
1.1 Introduction ......................................................................................1
1.2 Basic features ....................................................................................1
1.3 Theory of operation ...............................................................................1
1.4 System components .............................................................................4
1.4.1 The XMO2 transmitter .....................................................................................4
1.4.2 The sample system .......................................................................................5
1.4.3 Long cables (optional) ....................................................................................5
1.4.4 Power supply (optional)...................................................................................5
1.4.5 The TMO2D display/controller (optional) ..................................................................5
Chapter 2. Installation ..................................................................6
2.1 Introduction .....................................................................................6
2.2 Installing the XMO2 transmitter ..................................................................6
2.3 Installing the sample system ....................................................................6
2.3.1 A basic system ............................................................................................6
2.3.1 Wiring the XMO2 transmitter ..............................................................................7
2.3.2 CE Mark requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
2.3.3 Grounding the XMO2 enclosure ...........................................................................8
2.3.4 Cable specifications ......................................................................................9
2.3.5 Accessing terminal Blocks TB1 and TB2....................................................................9
2.3.6 Wiring the signal connections ............................................................................11
2.4 Establishing the RS232 communication link ......................................................11
2.5 Connecting to other devices .....................................................................12
2.5.1 The PS5R-C24 power supply .............................................................................12
2.5.2 TMO2D display ...........................................................................................12
2.5.3 LDP display ...............................................................................................12
2.5.4 XDP display ..............................................................................................12
2.5.5 Moisture image/monitor series analyzers................................................................12
2.5.6 System 1 analyzer ........................................................................................12
Chapter 3. Startup and operation ...................................................... 13
3.1 Introduction .....................................................................................13
3.2 Powering Up the XMO2 transmitter ...............................................................13
3.3 Establishing a sample gas flow ..................................................................13
3.4 Analog output calibration options .............................................................. 14
3.5 Factory calibration procedures ................................................................. 14
3.6 Enhancing the factory calibration............................................................... 16
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3.7 Required calibration materials.................................................................. 16
3.8 Preparing for field calibration ................................................................... 16
3.9 One-Gas pushbutton field calibration .......................................................... 18
3.10 Two-Gas pushbutton field calibration........................................................... 18
3.10.1 Setup.....................................................................................................18
3.10.2 Zero gas pushbutton calibration.........................................................................18
3.10.3 Span gas pushbutton calibration........................................................................19
3.11 IDM Digital communication calibration ......................................................... 19
3.12 The edit functions menu ........................................................................ 19
3.13 The field cal menu ..............................................................................20
3.13.1 Perform cal..............................................................................................20
3.13.2 Configure cal ...........................................................................................20
3.13.3 Calibration drifts ........................................................................................ 22
3.13.4 Clear calibration ........................................................................................ 23
3.13.5 Hold last value .......................................................................................... 23
3.14 Changing the 4-20 mA analog output range ...................................................23
3.14.1 4-20mA range .......................................................................................... 23
3.14.2 4mA cal ................................................................................................. 23
3.14.3 20 mA cal ............................................................................................... 23
3.14.4 4-20mA test............................................................................................. 25
3.14.5 %O2 test.................................................................................................25
Chapter 4. Programming with instrument data manager ..............................27
4.1 Introduction ....................................................................................27
4.2 The edit functions menu ........................................................................27
4.2.1 The error handler menu..................................................................................27
4.2.2 Total drift error ..........................................................................................28
4.2.3 All other error conditions................................................................................28
4.3 The factory cal menu ...........................................................................28
4.3.1 Background gas labels .................................................................................28
4.3.2 Pressure compensation.................................................................................29
4.4 The advanced menu .............................................................................31
4.4.1 Fast response ........................................................................................... 32
4.4.2 Language ............................................................................................... 32
4.4.3 Meter ID .................................................................................................33
Chapter 5. Specifications ..............................................................35
5.1 Performance....................................................................................35
5.2 Functional specifications .......................................................................36
5.3 Physical specifications..........................................................................36
5.4 Optional accessories ...........................................................................37
5.5 Ordering information ...........................................................................37
5.6 Calibration specification........................................................................38
5.7 A Calibration sheet .............................................................................39
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Appendix A. Two typical applications ..................................................40
A.1 Blanketing gases in hydrocarbon liquid storage tanks ..........................................40
A.1.1 The problem ............................................................................................40
A.1.2 Equipment used. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
A.1.3 Basic operating procedure ..............................................................................41
A.1.4 Previous systems.........................................................................................41
A.2 Reactor feed gases in formaldehyde production ................................................42
A.2.1 The problem ............................................................................................42
A.2.2 Equipment used. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
A.2.3 Basic operating procedure .............................................................................43
A.2.4 Previous systems........................................................................................43
Appendix B. Outline and installation drawings .........................................44
Appendix C. IDM Menu maps ..........................................................60
Appendix D. Programming with PanaView .............................................64
D.1 Introduction ....................................................................................64
D.2 Wiring the RS232 interface ......................................................................64
D.3 Setting Up the communications port............................................................64
D.4 Adding the XMO2 ...............................................................................65
D.5 Changing meter settings .......................................................................66
Appendix E. CE Mark compliance ......................................................68
E.1 CE Mark requirements ..........................................................................68
E.2 EMI filter board..................................................................................69
E.3 Wiring the signal connections for the weatherproof version .....................................70
E.4 Wiring the signal connections for the explosion/flameproof version..............................71
viii

Chapter 1. Features and capabilities
1.1 Introduction
This chapter introduces you to the features and capabilities
of the Panametrics XMO2 Thermoparamagnetic Oxygen
Transmitter. The following specific topics are discussed:
• Basic features - a brief discussion of the XMO2
Transmitter’s basic features and capabilities
• Theory of operation - details on the sensor’s construction
and how the measurements are made
• System components - a description of the available XMO2
options and the required sample system
Note: The XMO2 technical specifications and ordering
information can be found in Chapter 5, Specifications.
1.2 Basic features
The XMO2 Transmitter measures the concentration of
oxygen in the 0-100% range in a variety of gas mixtures,
and it provides a 4-20 mA analog output signal that is
proportional to the oxygen concentration. In performing
these measurements, the microprocessor-based XMO2
provides automatic oxygen signal compensation for
background gas composition and/or pressure variations.
In addition, the XMO2 is equipped with Fast-Response
software, real-time error detection, and push-button field
calibration.
The XMO2 Transmitter offers several unique design features:
• Ultra-stable thermistors and a measuring cell that is
temperature-controlled at 45°C (113°F) provide excellent
zero and span stability, as well as a high tolerance to
ambient temperature variations. Optional measurement
cell operating temperatures of 60°C (140°F) and 70°C
(158°F) are available for special applications.
• The measurement cell design is resistant to
contamination and relatively tolerant of sample gas
flow rate variations. As it has no moving parts, the XMO2
performs reliably under the shock and vibration found in
many industrial applications.
• The XMO2’s unique “bridge-within-a-bridge”
measurement circuit and microprocessor-based
operation automatically compensate the oxygen signal
for variations in the magnetic and thermal properties
of the background gas that would otherwise cause
measurement errors.
• At high oxygen concentrations, changes in atmospheric
pressure have significant effects on the measured
oxygen level. However, the XMO2 provides automatic
microprocessor-based atmospheric pressure
compensation of the oxygen signal for these applications.
• The XMO2 modular construction means that the unit can
be field-calibrated quickly and easily. Also, the plug-in
measuring cell can be replaced with a pre-calibrated
spare in just minutes.
• The XMO2 transmitter, which is available in weatherproof
or explosion-proof packaging, is designed to be installed
as close as possible to the process sample point. It can
be located up to 450 ft (150 m) from the control system,
display, or recorder using standard Panametrics cables.
• An RS232 serial communications interface and a multi-
level, menu-driven User Program provide a convenient
means for calibrating and programming the XMO2.
• Internal software algorithms along with user-programmed
calibration data provide compensation of the oxygen
signal for background gas composition, atmospheric
pressure, or both background gas composition and
atmospheric pressure.
• Panametrics proprietary Fast-Response software provides
enhanced response times to track rapidly changing
processes.
• Sophisticated error-checking software with user-
programmable defaults and error limits detects abnormal
measurement conditions.
• Pushbutton adjustment of the 4-20 mA analog output zero
and span values is a standard feature with the XMO2.
• A drift calibration routine provides automatic drift
compensation for minor changes in the sensor calibration
setting.
• Programmable recalibration is accomplished in the
field via a computer interface, with no potentiometers to
adjust.
1.3 Theory of operation
The XMO2 measures the concentration of oxygen in a gas
mixture by utilizing the unique paramagnetic properties of
oxygen.
As its magnetic susceptibility is approximately 100 times
greater than that of most other common gases, oxygen
can be easily distinguished from these gases based on
its behavior in a magnetic field. Also, oxygen’s magnetic
susceptibility varies inversely with temperature. Therefore,
by carefully combining a magnetic field gradient and a
temperature gradient within the XMO2 measuring cell,
an oxygen-containing gas mixture can be made to flow
along these gradients. This induced gas flow is known as a
magnetic wind. The intensity of this magnetic wind depends
on the concentration of oxygen in the gas mixture.
Figure 1 below shows a flow schematic for the XMO2
measuring cell. Permanent magnets within the cell create
a magnetic field, while the cell temperature is controlled
at 45°C (113°F) to maintain thermal equilibrium. In addition,
the cell contains two pairs of highly-stable, glass-coated
1

thermistors. One thermistor of each pair located inside the
magnetic field and the other thermistor of each pair located
outside the field. Because the thermistors are electrically
heated, a temperature gradient is thus created within the
magnetic field.
Figure 2 below shows the arrangement of the two thermistor
pairs.
A small portion of the sample gas flow is allowed to
diffuse from the lower chamber into the upper chamber
of the measurement cell. If the sample gas contains
a paramagnetic gas such as oxygen, it is attracted to
the magnetic field, causing the sample gas pressure to
become locally higher in the center of the chamber. At the
same time, the sample gas pressure is slightly lower near
the thermistors because the high thermistor temperature
causes the paramagnetic properties of oxygen to decrease.
This slight gradient in sample gas pressure causes the
sample gas to flow outward from the center of the magnetic
field and over the thermistors. As a result, the inner, wind-
generating thermistors decrease in temperature as they
lose heat to the magnetic wind. This causes a temperature
gradient between the cooler inner thermistors and the
warmer outer thermistors.gure 2: Typical XMT1000 labels (stainless
Figure 1: Measuring cell flow schematic
Figure 2: Arrangement of the thermistor pairs
2

steel enclosure)
Figure 3: XMT1000 enclosure clearances (ref. dwg. 712-2164)
Figure 3 below shows how the two thermistor pairs are
connected in series in an electronic bridge circuit. The
bridge circuit becomes unbalanced as the electrical
resistance of the thermistors changes with temperature.
This circuit imbalance causes a voltage drop, which is
proportional to the oxygen concentration in the gas being
measured, to appear across the bridge circuit.
As the background gases that comprise the balance of an
oxygen-containing gas mixture change, the magnetic and
thermal properties of the gas mixture also change. This
affects the accuracy and response of any paramagnetic
oxygen analyzer. To compensate for such variations, the
XMO2 has a unique “bridge-within-a-bridge” design.
The oxygen measuring bridge circuit described on the
previous page is itself one arm of another compensation
bridge circuit that maintains the oxygen bridge at a
constant temperature as background gas composition
changes. The electrical power change necessary to keep
the oxygen bridge at constant temperature is a function of
the thermal properties of the background gas. Therefore,
this power fluctuation provides a signal that is related to
the thermal conductivity of the background gas. That signal
is then used to reduce the effects of the background gas
variation on the oxygen span point measurement.
In addition to maintaining a constant oxygen bridge
temperature, the XMO2 microprocessor compensates
for any zero point shift in the oxygen bridge circuit output
caused by background gas changes.
Finally, the bridge circuit voltage is further adjusted
for variations in background gas composition and/or
atmospheric pressure by internal, microprocessor-based
compensation algorithms. The compensated signal is then
amplified and converted to a 4-20 mA analog output that
is proportional to the concentration of oxygen in the gas
mixture.
3

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
4

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.
5

Chapter 2. Installation
2.1 Introduction
This chapter describes how to install the XMO2 transmitter
and its sample system. It also contains information on
connecting optional system components. Installation of the
XMO2 system consists of three basic steps:
1. Installing the XMO2 transmitter in the sample system (if
you purchased your sample system from Panametrics,
this step has already been done for you)
2. Mounting, plumbing, and wiring the sample system
3. Making wiring connections for power input, 4-20 mA
analog output, RS232 digital output, and optional
external devices
2.2 Installing the XMO2 transmitter
Note: This section applies only if the XMO2 transmitter
has not already been installed in the sample system by
Panametrics.
The sample system must deliver a clean, representative gas
sample to the XMO2 at the proper temperature, pressure
and flow rate. This usually means a clean, dry gas sample
that is free of solid and liquid particulates and is delivered at
atmospheric pressure, a temperature no greater than 40°C
(104°F), and a flow rate of approximately 1.0 SCFH (500 cc/
min). A typical sample system for the XMO2 might include
an inlet gas flow regulating needle valve, a sample gas flow
meter, and a pressure gauge.
Note: Because factory calibration of the XMO2 is done
at atmospheric pressure and at a flow rate of 1.0 SCFH,
operation of the XMO2 at other pressures and/or flow rates
requires a field recalibration to ensure optimum accuracy.
To install the XMO2 transmitter in the sample system,
complete the following steps:
1. Select a location in the sample system that provides at
least 9 in. (230 mm) of clearance above the top cover
of the XMO2 for access to the interior of the transmitter
enclosure.
2. Mount the XMO2 transmitter in the sample system via
its two mounting holes. Be sure that the transmitter is
upright and is level to within ±15°.
3. Use 1/4” stainless steel tubing to connect the sample
system Inlet and Outlet fittings to the corresponding
XMO2 ports.
WARNING!
For explosion-proof units, be sure to
conform to all safety and electrical code
requirements.
2.3 Installing the sample system
You can order a complete sample system from Panametrics
that is mounted on a steel panel and includes the XMO2
transmitter and all necessary components and plumbing.
Several standard sample systems are available, and
custom-designed sample systems can be built to your
exact specifications.
2.3.1 A Basic system
Figure 5 shows a basic sample system (dwg #732-164) that
has been designed for use with the XMO2 transmitter.
The sample system shown in Figure 5 on page 7 consists of
a painted steel plate with the following components
mounted on it:.
• Inlet needle valves for sample, zero, and span gas flow
regulation
• Ball valves for flow selection
• An XMO2 transmitter
• A sample gas outlet pressure gauge
• A sample gas flowmeter
Other components, such as a pump, a filter/coalescer, or a
pressure regulator could be added to the system if needed.
2.3.0a Mounting the sample system
To mount the sample system, complete the following steps:
1. Select a location that is as close as possible to the
process sampling point. The ambient temperature at
this location should be in the range of -20° to +40°C (-4°
to +104°F).
IMPORTANT:
A For locations where the ambient temperature falls
below -20°C (-4°F), install the sample system in a heated
enclosure
2. Using the mounting holes provided, fasten the sample
system to a convenient vertical surface. The system
must be installed in an orientation that keeps the XMO2
transmitter upright and level to within ±15°.
3. After the sample system has been mounted, use 1/4”
stainless steel tubing to connect all inlet and outlet
lines to the 1/4” tube fittings on the sample system. The
sample line leading from the process to the sample
system should be as short as possible in order to
decrease system lag time and to prevent condensation
in the line.
6

Proceed to the next section to begin wiring the system.
CAUTION!
Always apply power to the XMO2 transmitter
immediately after installation, especially if it
is mounted outdoors or in a humid area.
2.3.1 Wiring the XMO2 transmitter
This section describes how to make all necessary electrical
connections to the XMO2 system.
Figure 5: Basic XMO2 sample system (ref. dwg #732-164)
7

2.3.2 CE Mark requirements
CAUTION!
To meet CE Mark requirements, all electrical
cables must be grounded and shielded as
described in Appendix E.
2.3.3 Grounding the XMO2 enclosure
WARNING!
The XMO2 transmitter enclosure must be
properly grounded.
Connect the external ground screw on the XMO2 enclosure
(see Figure 6 below) to a suitable earth ground.
Figure 6: XMO2 Ground screw locations
8

2.3.4 Cable specifications
Table 1 below shows the transmitter wiring connections
using the standard Panametrics XMO2 4-wire cable [P/N
X4(L), where L = length in ft]. This cable can be used for
distances up to 450 ft (150 m).
Table 1: Panametrics 4-Wire XMO2 cable
Lead Color AWG Terminal
+24 VDC Line Red 22 TB1-1
24 VDC
Return Black 22 TB1-2
4-20 mA (+) White 22 TB1-3
4-20 mA (-) Green 22 TB1-4
If you are using your own cable to wire the XMO2, refer to
Table 2 below for cable requirements.
Table 2: Non-Panametrics cable requirements
MAX. CABLE LENGTH WIRE SIZE
ft mAWG mm
450 130 22 0.35
700 200 20 0.60
1,050 320 18 1.00
1,700 500 16 1.20
2,800 850 14 2.00
4,000 1,200 12 3.00
Table 3 below shows the connections for the Panametrics
standard 3-wire RS232 cable (P/N 704-667, -668, -669, or
-670-L, where L = length in ft), which is available with a
DB-9 or a DB-25 connector (male or female). This cable is
available in standard lengths of 6 ft and 12 ft.
Table 3: Panametrics 3-Wire RS232 cable
Lead Color AWG Terminal
RX Red 22 TB2-1
TX White 22 TB2-2
GND Green 22 TB2-3
See EIA-RS Serial Communications (Panametrics document
#916-054) for a more detailed discussion of RS232 wiring.
Note: See Figure 64 on page 49 for detailed drawings of the
standard Panametrics cables described above.
2.3.5 Accessing terminal blocks TB1 and TB2
The 24 VDC power input, 4-20 mA analog output, and RS232
digital output wiring connections are made to terminal
blocks TB1 and TB2 inside the XMO2 enclosure (see Figure 7
below). To access this terminal block, loosen the locking set
screw and remove the cover from the transmitter. Then, refer
to Figure 7 below for the location and pin designations of
terminal blocks TB1 and TB2
CAUTION!
Do not make any connections to any unused
pins on terminal blocks TB1 or TB2.
9

Figure 7: TB1 and TB2 terminal block connections
Proceed to the next section to begin making connections to terminal blocks TB1 and TB2.
10

2.3.6 Wiring the signal connections
Complete the following steps to make the signal
connections to terminal blocks TB1 and TB2:
1. Install a cable clamp or gland in one of the 3/4” conduit
holes.
CAUTION!
Be sure to plug the unused conduit hole to
maintain the designated weatherproof or
explosion-proof rating.
2. Route the 4-wire and 3-wire (if used) cables through
the cable clamp. Then, tighten the clamp to secure the
cable(s).
3. Unplug the TB1 and TB2 connectors by pulling them
straight off the printed circuit board, and loosen the
screws on the side of the connectors.
4. Connect the 24 VDC input power leads as follows:
CAUTION!
Connecting the +24 VDC (red) lead to any
terminal except TB1-1 will damage the XMO2.
a. Insert the 4-wire cable +24 VDC line (red) lead into pin
TB1-1 and tighten the screw.
b. Insert the 4-wire cable 24 VDC return (black) lead into
pin TB1-2 and tighten the screw.
5. Connect the 4-20 mA analog output leads as follows:
a. Insert the 4-wire cable + 4-20 mA (white) lead into pin
TB1-3 and tighten the screw.
b. Insert the 4-wire cable – 4-20 mA (green) lead into pin
TB1-4 and tighten the screw.
6. Connect the optional RS232 digital output leads as
follows:
a. Insert the 3-wire cable RX (red) lead into pin TB2-1 and
tighten the screw.
b. Insert the 3-wire cable TX (white) lead into pin TB2-2 and
tighten the screw.
c. Insert the 3-wire cable GND (green) lead into pin TB2-3
and tighten the screw.
7. Carefully plug the TB1 and TB2 connectors back onto
the printed circuit board, and reinstall the cover on the
XMO2.
8. Connect the other ends of the cables to the 24 VDC
power supply, the 4-20 mA input of the display/control
device, and the serial port of the computer or terminal
(see the instruction manuals for those devices for
details).
2.4 Establishing the RS232
communication link
Before the XMO2 can be programmed, a link between the
built-in RS232 digital output and a computer terminal must
be established. To accomplish this, proceed as follows:
Note: See Panametrics document EIA-RS Serial
Communications (916-054) for a details of the RS232
standard
1. Verify that either Com 1 or Com 2 on the computer is
unused.
IMPORTANT:
Do not use a virtual Com port, such as Com 3 or Com 4, for
communicating with the XMO2.
2. With both the XMO2 and the computer turned OFF,
connect a serial cable from the XMO2 to the PC. See
Chapter 2, Installation, for detailed instructions.
CAUTION!
Never make any connections to a computer
while it is powered up. Damage to the system
may result.
3. Power up the PC and launch the IDM software.
Note: See the IDM User’s Manual (910-185) for
information on installing and launching your program.
4. In the Global menu of IDM, select the Preferences option
to specify the com port to which your XMO2 has been
connected.
5. For proper communications with the XMO2, the following
com port settings must be specified:
• Baud Rate = 9600
• Data Bits = 8
• Parity = None
• Stop Bits = 1
• Flow Control = Xon/Xoff
6. Select the Connect to a New Instrument option, enter
the XMO2 ID number (1 to 254), and select OK.
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2.5 Connecting to other devices
This section discusses interconnection of the XMO2
transmitter with other Panametrics devices. The following
devices are included:
• PS5R-C24 power supply
• TMO2D display
• LDP display
• XDP display
• Moisture Image/Monitor Series analyzers
• System 1 moisture analyzer
2.5.1 The PS5R-C24 power supply
The Panametrics PS5R-C24 power supply converts a 100-
240 VAC input to the required 24 VDC output. Figure 8 below
shows the PS5R-C24 connections. As indicated, the AC
input Line, Neutral and Ground connections are made to
the terminals along the bottom of the panel, while the DC
output +24V line and 24V return connections are made to
the terminals along the top of the panel. See the instructions
provided with the power supply for more details
Figure 8: PS5R-C24 Power supply connections
2.5.2 TMO2D display
The Panametrics TMO2D Display provides a two-line x
24 character back-lit LCD. It features display and option
programming via the keyboard and it offers recorder
outputs, alarm relays, and optional relays for driving sample
system solenoids for automatic zero and span calibration of
the XMO2. See Figure 74 on page 59 for an interconnection
diagram, and refer to the TMO2D User’s Manual (910-084) for
details on its operation.
2.5.3 LDP display
The LDP Display provides an integral, regulated 24 VDC
power supply, an adjustable 3-digit display to program
the 4-20 mA analog input range, two programmable
SPDT alarm relays rated for 1A @250 VAC, and an isolated,
independently-adjustable 4-20 mA analog output. The LDP
is supplied in an explosion-proof enclosure that is rated for
Cenelec EEx d IIC T6 and IP66 (with an optional gasket). See
Figure 74 on page 59 for an interconnection diagram, and
refer to the LDP User’s Manual (910-225) for details on its
operation.
2.5.4 XDP display
The XDP Explosion-proof Display Package provides an
integral, regulated 24 VDC power supply, a 3-digit display
with an adjustable 4-20 mA analog input range, two
SPDT alarm relays rated for 1A @250 VAC, and an isolated,
independently-adjustable 4-20 mA analog output. See
Figure 74 on page 59 for an interconnection diagram, and
refer to the XDP User’s Manual (910-204) for details on its
operation and specifications.
2.5.5 Moisture image/monitor series analyzers
These Panametrics instruments include the Moisture Image
Series 1 and Moisture Monitor Series 3 analyzers. These
analyzers accept inputs from a variety of sensors (including
the XMO2) and offer graphical and digital interfaces. See
Figure 74 on page 59 for interconnection diagrams, and
refer to the User’s Manual (910-108 or 110) for details on its
operation.
Note: An external 24 VDC power supply (such as the
PS5R-C24) is required to use the XMO2 with these analyzers
2.5.6 System 1 analyzer
The Panametrics System 1 is a versatile multi-channel
analyzer which accepts inputs from any combination of
Panametrics moisture, temperature, oxygen, and thermal
conductivity transmitters. See Figure 74 on page 59 for an
interconnection diagram, and refer to the System 1 User’s
Manual (900-019) for details on its operation.
Note: An external 24 VDC power supply (such as the
PS5R-C24) is required to use the XMO2 with the System 1
analyzer.
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