GE Moisture Image 1 Series User guide

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Instra

Moisture Image Series 1
Hygrometer
Startup Guide
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June 2004
Process Control Instruments
Moisture Image Series 1
Hygrometer
Startup Guide 910-108UB3
!ATTENTION!
This guide contains instructions for Series 1
units equipped with the latest controller card
(p/n 703-1250). This controller card supports the
PanaCom/PanaView user interface software.
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iii
June 2004
Moisture Image Series 1
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April 2004
iv
Warranty Each instrument manufactured by GE Panametrics is warranted to be
free from defects in material and workmanship. Liability under this
warranty is limited to restoring the instrument to normal operation or
replacing the instrument, at the sole discretion of GE Panametrics. Fuses
and batteries are specifically excluded from any liability. This warranty
is effective from the date of delivery to the original purchaser. If GE
Panametrics determines that the equipment was defective, the warranty
period is:
•one year for general electronic failures of the instrument
•one year for mechanical failures of the sensor
If GE Panametrics determines that the equipment was damaged by
misuse, improper installation, the use of unauthorized replacement parts,
or operating conditions outside the guidelines specified by GE
Panametrics, the repairs are not covered under this warranty.
The warranties set forth herein are exclusive and are in lieu of
all other warranties whether statutory, express or implied
(including warranties or merchantability and fitness for a
particular purpose, and warranties arising from course of
dealing or usage or trade).
Return Policy If a GE Panametrics instrument malfunctions within the warranty period,
the following procedure must be completed:
1. Notify GE Panametrics, giving full details of the problem, and
provide the model number and serial number of the instrument. If the
nature of the problem indicates the need for factory service, GE
Panametrics will issue a RETURN AUTHORIZATION NUMBER
(RAN), and shipping instructions for the return of the instrument to a
service center will be provided.
2. If GE Panametrics instructs you to send your instrument to a service
center, it must be shipped prepaid to the authorized repair station
indicated in the shipping instructions.
3. Upon receipt, GE Panametrics will evaluate the instrument to
determine the cause of the malfunction.
Then, one of the following courses of action will then be taken:
•If the damage is covered under the terms of the warranty, the
instrument will be repaired at no cost to the owner and returned.
•If GE Panametrics determines that the damage is not covered under
the terms of the warranty, or if the warranty has expired, an estimate
for the cost of the repairs at standard rates will be provided. Upon
receipt of the owner’s approval to proceed, the instrument will be
repaired and returned.
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v
June 2004
Table of Contents
Chapter 1: Installation
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Unpacking the Series 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Checking the Delta F Oxygen Cell for Leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Checking the Delta F Oxygen Cell for Leakage (cont.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Choosing a Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Low Voltage Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
BASEEFA Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
CSA Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
General Guidelines for Choosing a Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Moisture/Temperature Probe Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Moisture Condensation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Static or Dynamic Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Long-Term Storage & Operational Stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Freedom from Interference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Corrosive Materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Sample System Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Moisture Sample Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Oxygen Sample Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10
Mounting the System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-12
Mounting the Electronics Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-12
Mounting the Sample System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-12
Mounting the Oxygen Cell Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-12
Installing the Probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-13
Moisture Probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-13
Pressure Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-14
Delta F Oxygen Cell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-15
Making Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-18
Making Channel Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-18
Connecting the Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-19
Installation Instructions for CE Mark Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-19
Connecting Moisture Probes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-20
Connecting the Delta F Oxygen Cell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-28
Establishing a Gas Flow Through the Oxygen Cell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-33
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June 2004
vi
Table of Contents (cont.)
Chapter 2: Initial Setup
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Using the Front Panel to Access Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Powering Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Entering Data into the User Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Screen and Key Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Entering the Passcode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Verifying and Entering Setup Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Activating and Changing Probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Entering Calibration Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Entering High and Low Reference Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Displaying Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
Chapter 3: Specifications
Overall Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Moisture Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Pressure Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Temperature Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Oxygen Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Electronic Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Output Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Input Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Probe Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Moisture Image Series Probe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
TF Series Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
M Series Probe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Delta F Oxygen Cell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
External Pressure Transmitter (optional). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
Appendix A: Program Information List
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Chapter 1
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Installation
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Unpacking the Series 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Checking the Delta F Oxygen Cell for Leakage. . . . . . . . . . . . . . .1-2
Choosing a Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Moisture/Temperature Probe Considerations . . . . . . . . . . . . . . . .1-6
Sample System Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Mounting the System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-12
Installing the Probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-13
Making Electrical Connections. . . . . . . . . . . . . . . . . . . . . . . . . . .1-18
Establishing a Gas Flow Through the Oxygen Cell . . . . . . . . . .1-33
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Installation 1-1
April 2004
Introduction Users typically install the Moisture Image Series 1 as part of a
complex process system, which includes components such as filters,
pumps, and pressure regulators. In such an environment, probes and
other parts of the system may be subjected to environmental hazards,
such as high temperature, pressure extremes, corrosive elements and
mechanical vibrations.
This section contains information and instructions for installing the
Series 1 into a process system taking into account all of the above
factors. The following section describes how to set up and connect it.
If you have questions about applications or installation, call an
applications engineer. The toll-free phone number is 1-800-833-9438
(within the USA) or 781-899-2719 (outside the USA).
!WARNING!
To ensure the safe operation of this unit, you must
install and operate the Series 1 as described in this
user’s manual. In addition, be sure to follow all
applicable safety codes and regulations for
installing electrical equipment in your area.
Unpacking the Series 1 Before beginning the installation, unpack the unit and make sure all
the parts and documentation listed on the packing slip are included.
The packing slip may not list the Calibration Data Sheet(s), which are
usually packed in the plastic storage case with the moisture, oxygen,
and pressure probes. You may also find the Calibration Data Sheet(s)
in an envelope taped to the Series 1. There should be one Calibration
Data Sheet for each probe. Staple the Calibration Data Sheets to the
Program Information List supplied in Appendix A and store them in a
safe place.
Be sure to inspect each piece of equipment, including the sample
system, for evidence of mishandling. If anything has been damaged,
report this to the carrier and to GE Panametrics immediately. You
should leave the plastic caps on the probes and the pressure
transmitters when they are not installed in the process stream.
If anything is missing, contact GE Panametrics immediately.
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April 2004
1-2 Installation
Checking the Delta F
Oxygen Cell for
Leakage
Before connecting the Delta F oxygen cell(s), you must check it for
damage and/or leakage. Depending on the application, the oxygen
cell may have a top drain or both a top and bottom drain for the
electrolyte reservoir. It is important to identify which type of cell you
have for the following procedure. Use Figure 1-1 below to identify
your cell. To check the cell for leakage:
1. Remove the top of the electrolyte reservoir.
IMPORTANT: If your cell also has a bottom drain, make sure that
the electrolyte discharge valve, mounted on the rear
of the oxygen cell, is closed (in the vertical position).
See Figure 1-1 below.
2. Add approximately three ounces (100 ml) of distilled water to the
reservoir and replace the top.
3. Using the min/max window on the oxygen cell, check the water
level (see Figure 1-2 on page 1-3).The water should cover about
60% of the window.
Figure 1-1: Delta F Oxygen Cell Drains
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Top Drain
Bottom Drain
Electrolyte Discharge Valve
(in vertical, closed position)
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Installation 1-3
April 2004
Checking the Delta F
Oxygen Cell for
Leakage (cont.)
4. Let the oxygen cell stand for about 6 hours; then check for any
leakage.
5. If there is no leakage, drain the cell completely.
If the cell leaks, see the warranty information at the beginning of this
manual.
Figure 1-2: Delta F Oxygen Cell Water Level Window
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Water Level
Min/Max Window
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April 2004
1-4 Installation
Choosing a Site You should have discussed environmental and installation factors
with a GE Panametrics applications engineer or field sales person by
the time you receive the meter. The equipment should be suited to the
application and installation site.
The Series 1 is available in rack, bench, or panel mounts that are
suitable for most indoor installations. GE Panametrics also provides
weatherproof and explosion-proof housings for outdoor and
hazardous area locations. See the drawings at the end of this chapter
for an example of each enclosure.
Before installing the unit, read the guidelines below to verify that you
have selected the best installation site.
Low Voltage Directive To comply with the Low Voltage Directive, you must install a switch
or circuit breaker on the input power line. For greatest safety, locate
the circuit breaker or power switch near the electronics console.
!WARNING!
Division 2 applications may require special
installation. Consult the National Electric Code
for proper installation requirements. The analyzer
must be configured in a suitable equipment
enclosure and installed per the National Electric
Code Article 500 applicable sections which pertain
to the hazardous environment classification in
which the electronics will be used.
BASEEFA Certification Rack, bench, and panel Series 1 units, s/n 2000 and above, and WPF
Series 1 units, s/n 2300 and above, are BASEEFA certified to supply
intrinsically safe levels. Installation requires that the Series 1 be
mounted in a general purpose area only. M Series, TF Series, and
Moisture Image Series probes and Delta F oxygen cells are
intrinsically safe when connected to the Series 1, allowing for sensor
installation in IEC/CENELEC zone 0 areas.
CSA Certification Newer versions of rack, bench, panel and WPF Series 1 units are
CSA-NRTL certified intrinsically safe. Installation requires that the
Series 1 be mounted in either a NEC CL.1, Div. 2, Group B, C or D
hazardous area or a general purpose area. M Series, TF Series, and
Moisture Image Series probes and Delta F oxygen cells are
intrinsically safe when connected to the Series 1, allowing for sensor
installation in NEC CL.1, Div. 1, Groups A, B, C and D hazardous
areas.
Note: Refer to certification labels on your instrument and
installation drawing #752-158 to determine the applicable
level of certification that your meter carries.
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Installation 1-5
April 2004
General Guidelines for
Choosing a Site •Choose an installation site for the probes and sample systems that
is as close to the process line as possible. Avoid long lengths of
connecting tubing. If long distances are unavoidable, a fast
sampling by-pass loop is recommended. Do not install any other
components, such as filters, ahead of the probes or sample system
unless instructed to do so by GE Panametrics.
•Observe all normal safety precautions. Use the probes within their
maximum pressure and temperature ratings.
•Although the Series 1 may not need to be accessed during normal
operation, install the electronics unit at a convenient location for
programming, testing and servicing. A control room or instrument
shed are typical locations.
•Locate the electronics unit away from high temperatures, strong
electrical transients, mechanical vibrations, corrosive atmospheres,
and any other conditions that could damage or interfere with the
meter operation. See Chapter 3, Specifications, for limits.
•Protect the probe cables from excessive physical strain (bending,
pulling, twisting, etc.). In addition, do not subject the cables to
temperatures above 65°C (149°F) or below -50°C (-58°F).
•Observe the proper cable restrictions for the probes. You can
locate the Moisture Image Series probe up to 915 meters (3000
feet) away from the electronics unit with unshielded twisted pair
cable. The M Series and TF Series probes require specially
shielded cable. You can locate the M and TF probes up to 600
meters (2000 feet) from the unit. If you are measuring pressure
with a TF probe, the cable length should not exceed 152 meters
(500 feet).
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June 2004
1-6 Installation
Moisture/Temperature
Probe Considerations The M Series, TF Series, and Moisture Image Series probes consist of
an aluminum oxide sensor mounted on a connector head. Standard
probe mounts include a protective stainless steel shield.
The probe sensor materials and housing maximize durability and
insure a minimum of water absorbing surfaces in the vicinity of the
aluminum oxide surface. A sintered stainless steel shield is used to
protect the sensor from high flow rates and particulate matter. The
end cap should not be removed except upon advice from GE
Panametrics.
The sensor has been designed to withstand normal shock and
vibration. You should make sure that the active sensor surface is
never touched or allowed to come into direct contact with foreign
objects, since this may adversely affect performance.
Observing these few simple precautions will result in a long and
useful probe life. GE Panametrics recommends that probe calibration
be checked routinely, at 12-month intervals, or as recommended by
our applications engineers for your particular application.
The probe will measure the water vapor pressure in its immediate
vicinity; therefore, readings will be influenced by its proximity to the
system walls, materials of construction, and other environmental
factors.The sensor can be operated under vacuum or pressure, flowing
or static conditions.
Observe the following environmental precautions.
Temperature Range The standard probe is operable from -110°C to +70°C
(-166°F to 158°F).
Moisture Condensation Be sure the temperature is at least 10°C higher than the dew/frost
point temperature. If this condition is not maintained, moisture
condensation could occur on the sensor or in the sample system,
which will cause reading errors. If this happens, dry out the probe
following the procedures outlined in Appendix A, Application of the
Hygrometer, in the Service Manual.
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Installation 1-7
April 2004
Static or Dynamic Use The sensor performs equally well in still air or where considerable
flow occurs. Its small size makes it ideal for measuring moisture
conditions within completely sealed containers or dry boxes. It will
also perform well under gas flow conditions as high as 10,000 cm/sec
and liquid flow conditions to 10 cm/sec. Refer to Appendix A,
Application of the Hygrometer, in the Service Manual, for maximum
flow rates in gases and liquids.
Pressure The moisture probe always senses the correct water vapor pressure
regardless of the total ambient pressure. The moisture sensor
measures water vapor under vacuum or high pressure conditions from
as little as a few microns Hg to as high as 5000 psi total pressure.
Long-Term Storage &
Operational Stability Sensors are not affected by continuous abrupt humidity changes or
damaged by exposure to saturation conditions even when stored.
However, you should store probes in their original shipping
containers in a clean, dry location. If the probe is saturated during
storage, refer to Moisture Condensation on page 1-6 before installing
the probe. For best performance, do not store probes longer than one
to two years from their calibration date.
Freedom from
Interference The sensor is completely unaffected by the presence of a wide variety
of gases or organic liquids. Large concentrations of hydrocarbon
gases, Freon
™ , ozone, carbon dioxide, carbon monoxide, and
hydrogen have no effect on sensor water vapor indications. The
sensor will operate properly in a multitude of gaseous or non-
conductive liquid environments.
Corrosive Materials Avoid all materials that are corrosive or otherwise damaging to
aluminum or aluminum oxide. These include strongly acidic or basic
materials and primary amines.
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April 2004
1-8 Installation
Sample System
Guidelines A sample system is required for oxygen measurement and, although
not mandatory, is highly recommended for moisture measurement.
The purpose of a sample system is to condition or control a sample
stream to within the specifications of a probe. The application
requirements determine the design of the sample system. GE
Panametrics applications engineers will make recommendations
based on the following general guidelines.
Moisture Sample
Systems Typically, sample systems should be kept very simple. They should
contain as few components as possible and all or most of those
components should be located downstream of the measurement
probe. Figure 1-3 on page 1-9 shows an example of a basic sample
system consisting of an explosion-proof housing with a sample cell, a
filter, a flowmeter, a vent valve and two-shut off valves, one at the
inlet and one at the outlet.
The sample system components should not be made of any material
that will affect measurements. A sample system may include a filter
to remove particulates from the sample stream or a pressure regulator
to reduce or control the pressure of the stream. However, most
common filters and pressure regulators are not suitable for sample
systems because they have wetted parts that may absorb or release
components (such as moisture) into the sample stream. They may also
allow ambient contamination to enter the sample stream. In general,
you should use stainless steel material for all wetted parts.
Contact GE Panametrics for further instructions.
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Installation 1-9
April 2004
Moisture Sample
Systems (cont.)
Figure 1-3: A Typical Moisture Sample System
Note: The actual sample system design is dependent on the
application requirements.
Sample
Cell
Sample
Inlet
Sample
Outlet
Vent
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April 2004
1-10 Installation
Oxygen Sample
Systems Oxygen sample systems are required and can be ordered from GE
Panametrics for bench or wall mounting. You can also build your
own sample system by using the following guidelines.
IMPORTANT: The GE Panametrics warranty will be voided if the
sample system does not have a relief valve.
The basic sample system requirements are as follows (see Figure 1-4
on page 1-11):
1. The oxygen cell requires a sample gas flow of 2.0 to 2.5 SCFH.
2. The sample gas pressure in the cell must be between 0.0 and
1.0 psig. The pressure must not exceed 1.0 psig.
3. A 10 psig pressure relief valve installed upstream of the oxygen
cell is required to prevent over-pressure.
4. A flow meter is required to measure the flow.
5. A pressure gage is required to measure the pressure.
6. A flow regulating or needle valve is required to regulate flow and
should be located upstream of the cell.
7. A pressure regulator is required for sample gas supplies of 50 psig
or greater.
If a sample pump is required to draw a sample to the oxygen cell, the
pump should be installed downstream of the oxygen cell. This will
also require you to install a vacuum relief valve set at 1.0 psig
between the oxygen cell and the pump.
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Installation 1-11
April 2004
Oxygen Sample
Systems (cont.)
Figure 1-4: A Typical Oxygen Cell Sample System
Note: The actual sample system design is dependent on the
application requirements.
Sample
Inlet
Sample
Outlet
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