TELEDYNE API 465H User Manual
USER MANUAL
MODEL 465H
OZONE MONITOR
©2007-2018 TAPI 06161H DCN7969
Teledyne API 21 August 2018
Teledyne API (TAPI)
9970 Carroll Canyon Road
San Diego, CA 92131-1106
Toll-Free: 800-324-5190
Phone: +1 858-657-9800
FAX: +1 858-657-9816
Email: api-sales@teledyne.com
Website: http://www.teledyne-api.com/
SAFETY MESSAGES
Important safety messages are provided throughout this manual for the purpose of avoiding
personal injury or instrument damage. Please read these messages carefully. Each safety
message is associated with a safety alert symbol and placed throughout this manual and inside the
instrument. The symbols with messages are defined as follows:
WARNING: Electrical Shock Hazard
HAZARD: Strong oxidizer
GENERAL WARNING/CAUTION: Read the accompanying message for
specific information.
CAUTION: Hot Surface Warning
Do Not Touch: Touching some parts of the instrument without protection or
proper tools could result in damage to the part(s) and/or the instrument.
Technician Symbol: All operations marked with this symbol are to be
performed by qualified maintenance personnel only.
Electrical Ground: This symbol inside the instrument marks the central
safety grounding point for the instrument.
CAUTION
GENERAL SAFETY HAZARD
This instrument should only be used for the purpose and in the
manner described in this manual. If you use it in a manner other
than that for which it was intended, unpredictable behavior could
ensue with possible hazardous consequences.
NEVER use any gas analyzer to sample combustible gas(es).
06161H DCN7969 Teledyne API Model 465H O3 Monitor User Manual i
CONSIGNES DE SÉCURITÉ
Des consignes de sécurité importantes sont fournies tout au long du présent manuel dans
le but d’éviter des blessures corporelles ou d’endommager les instruments. Veuillez lire
attentivement ces consignes. Chaque consigne de sécurité est représentée par un
pictogramme d’alerte de sécurité; ces pictogrammes se retrouvent dans ce manuel et à
l’intérieur des instruments. Les symboles correspondent aux consignes suivantes :
AVERTISSEMENT : Risque de choc électrique
DANGER : Oxydant puissant
AVERTISSEMENT GÉNÉRAL / MISE EN GARDE : Lire la consigne
complémentaire pour des renseignements spécifiques
MISE EN GARDE : Surface chaude
Ne pas toucher : Toucher à certaines parties de l’instrument sans
protection ou sans les outils appropriés pourrait entraîner des dommages
aux pièces ou à l’instrument.
Pictogramme « technicien » : Toutes les opérations portant ce symbole
doivent être effectuées uniquement par du personnel de maintenance
qualifié.
Mise à la terre : Ce symbole à l’intérieur de l’instrument détermine le
point central de la mise à la terre sécuritaire de l’instrument.
MISE EN GARDE
Cet instrument doit être utilisé aux fins décrites et de la manière décrite dans
ce manuel. Si vous utilisez cet instrument d’une autre manière que celle pour
laquelle il a été prévu, l’instrument pourrait se comporter de façon
imprévisible et entraîner des conséquences dangereuses.
NE JAMAIS utiliser un analyseur de gaz pour échantillonner des gaz
combustibles!
ii Teledyne API Model 465H O3 Monitor User Manual 06161H DCN7969
WARRANTY
WARRANTY POLICY (02024J)
Teledyne API (TAPI), a business unit of Teledyne Instruments, Inc.,
provides that:
Prior to shipment, TAPI equipment is thoroughly inspected and tested.
Should equipment failure occur, TAPI assures its customers that prompt
service and support will be available. (For the instrument-specific warranty
period, please refer to the “Limited Warranty” section in the Terms and
Conditions of Sale on our website at the following link:
http://www.teledyne-api.com/terms_and_conditions.asp).
COVERAGE
After the warranty period and throughout the equipment lifetime, TAPI
stands ready to provide on-site or in-plant service at reasonable rates similar
to those of other manufacturers in the industry. All maintenance and the first
level of field troubleshooting are to be performed by the customer.
NON-TAPI MANUFACTURED EQUIPMENT
Equipment provided but not manufactured by TAPI is warranted and will be
repaired to the extent and according to the current terms and conditions of
the respective equipment manufacturer’s warranty.
Product Return
Failure to comply with proper anti-Electro-Static Discharge (ESD) handling
and packing instructions and Return Merchandise Authorization (RMA)
procedures when returning parts for repair or calibration may void your
warranty. For anti-ESD handling and packing instructions please refer to the
manual, Fundamentals of ESD, PN 04786, in its “Packing Components for
Return to Teledyne API’s Customer Service” section. The manual can be
downloaded from our website at http://www.teledyne-api.com. RMA
procedures can also be found on our website.
All units or components returned to Teledyne API should be properly
packed for handling and returned freight prepaid to the nearest designated
Service Center. After the repair, the equipment will be returned, freight
prepaid.
The complete Terms and Conditions of Sale can be reviewed at
http://www.teledyne-api.com/terms_and_conditions.asp
CAUTION – Avoid Warranty Invalidation
06161H DCN7969 Teledyne API Model 465H O3 Monitor User Manual iii
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iv Teledyne API Model 465H O3 Monitor User Manual 06161H DCN7969
TABLE OF CONTENTS
1. INTRODUCTION......................................................................................................... 8
2. SPECIFICATIONS AND AGENCY APPROVALS ................................................. 9
2.1. SPECIFICATIONS ................................................................................................................................... 9
2.2. APPROVALS ........................................................................................................................................ 10
2.2.1. Safety ....................................................................................................................................... 10
2.2.2. EMC ........................................................................................................................................ 10
2.2.3. Other Type Certifications ....................................................................................................... 10
3. PRINCIPLE OF OPERATION ................................................................................. 11
4. GETTING STARTED ................................................................................................ 13
4.1. MECHANICAL INSTALLATION (FOR MONITORS IN NEMA 4X ENCLOSURES) ..................................... 13
4.1.1. Ventilation Clearance ............................................................................................................. 13
4.2. MECHANICAL INSTALLATION (19” RACK VERSION) ........................................................................... 14
4.2.1. Ventilation Clearance ............................................................................................................. 14
4.3. AC POWER CONNECTION (FOR MONITORS IN NEMA 4X ENCLOSURE) ............................................. 15
4.3.1. Wiring Requirements for NEMA Enclosures .......................................................................... 15
4.3.2. Wiring Instructions ................................................................................................................. 15
4.4. PNEUMATIC CONNECTIONS ................................................................................................................ 17
4.4.1. Installing Flow Control Assemblies ........................................................................................ 18
4.4.2. Ozone Inlet Connection ........................................................................................................... 19
4.4.3. Zero Gas Connection .............................................................................................................. 19
4.4.4. Exhaust Connection ................................................................................................................ 19
4.5. ELECTRICAL I/O CONNECTIONS ......................................................................................................... 21
4.5.1. Location of I/O Connectors in the NEMA Configuration ....................................................... 21
4.5.2. Analog Output ......................................................................................................................... 22
4.5.3. Status Outputs ......................................................................................................................... 22
4.5.4. Hi-Current Relay Outputs ....................................................................................................... 23
4.5.5. Digital Serial Interfaces .......................................................................................................... 24
5. FREQUENTLY ASKED QUESTIONS .................................................................... 25
6. HARDWARE AND SOFTWARE OPTIONS ............................................................... 26
6.1. RACK MOUNT SLIDES ......................................................................................................................... 26
6.2. ETHERNET (MODBUS
®
TCP/IP) ....................................................................................................... 26
7. OPERATION .............................................................................................................. 27
7.1. FRONT PANEL OVERVIEW ................................................................................................................... 27
7.1.1. Ozone Concentration Display ................................................................................................. 27
7.1.2. Menu Navigation Keypad ....................................................................................................... 27
7.1.3. Concentration Alarm Status/Reset .......................................................................................... 28
7.1.4. Status LED’s ........................................................................................................................... 28
7.2. FRONT PANEL MENUS ........................................................................................................................ 29
7.2.1. Menu Navigation Basics ......................................................................................................... 29
7.2.2. Editing Numeric Values .......................................................................................................... 29
7.2.3. SETUP-ALARM Menu ............................................................................................................ 32
7.2.4. SETUP-VARS Menu ................................................................................................................ 33
7.2.5. DIAG Menu ............................................................................................................................. 34
7.2.6. VIEW Menu ............................................................................................................................. 37
7.2.7. CONFIG Menu ....................................................................................................................... 38
7.3. ANALOG OUTPUT ............................................................................................................................... 38
06161H DCN7969 Teledyne API Model 465H O3 Monitor User Manual v
8. DIGITAL COMMUNICATIONS ............................................................................. 39
8.1. DIGITAL COMMUNICATIONS OVERVIEW ............................................................................................ 39
8.2. CHANGING COM PORT HARDWARE CONFIGURATION ....................................................................... 39
8.3. RS-232 CONFIGURATION ................................................................................................................... 41
8.4. RS-485 CONFIGURATION ................................................................................................................... 42
8.5. ETHERNET CONFIGURATION .............................................................................................................. 43
8.5.1. Hardware Setup for Configuring the Ethernet Module .......................................................... 43
8.5.2. Verifying Network Hardware Connection .............................................................................. 43
8.5.3. Determining a Dynamically Assigned IP Address (DHCP Mode) ......................................... 44
8.5.4. Manually Assigning a Static IP Address ................................................................................ 44
8.6. MODBUS
8.6.1. Notes on MODBUS® registers ............................................................................................... 45
8.6.2. Real-Time Concentration and Status Registers (Read Only) ................................................. 46
8.6.3. Instrument Setup and Configuration Registers (Read / Write) ............................................... 46
®
REGISTER MAPS ............................................................................................................. 45
9. MAINTENANCE ........................................................................................................ 47
9.1. MAINTENANCE SCHEDULE ................................................................................................................. 47
9.2. INSTRUMENT LAYOUT ....................................................................................................................... 48
9.3. REPLACING INTERNAL PARTICULATE FILTER .................................................................................... 50
9.4. UV LAMP ADJUSTMENT .................................................................................................................... 51
9.5. UV LAMP REPLACEMENT .................................................................................................................. 52
9.6. REPLACING THE AUTO-ZERO VALVE ................................................................................................. 52
9.7. CONFIGURING THE ANALOG OUTPUT ................................................................................................ 53
9.8. CLEANING EXTERIOR SURFACES OF THE 465H .................................................................................. 54
9.9. BOOT LOADER OPERATION ................................................................................................................ 54
9.9.1. Boot Loader – Hardware Setup ............................................................................................. 54
9.9.2. Boot Loader – Software Setup ................................................................................................ 55
10. TROUBLESHOOTING ........................................................................................... 58
10.1. REFERENCE DRAWINGS ................................................................................................................... 58
10.1.1. Pneumatic Diagram ............................................................................................................. 58
10.1.2. Interconnect Diagram .......................................................................................................... 58
10.2. TROUBLESHOOTING USING FRONT PANEL STATUS LED’S OR STATUS OUTPUTS ............................ 60
10.2.1. Sensor OK ............................................................................................................................ 60
10.2.2. Invalid Reading .................................................................................................................... 61
10.2.3. Check Lamp ......................................................................................................................... 61
10.2.4. Pneumatic Error .................................................................................................................. 61
11. CALIBRATION ........................................................................................................ 63
11.1. FACTORY CALIBRATION .................................................................................................................. 63
12. TECHNICAL ASSISTANCE .................................................................................. 64
FIGURES
Figure 4-1: 465H Mounting Hole Locations and Dimensions ...................................................... 14
Figure 4-2. NEMA AC Power Connection to Monitor ................................................................. 16
Figure 4-3: Pneumatic Connections, Rack Mount Configuration ................................................. 17
Figure 4-4: Pneumatic Connections, NEMA Configuration ......................................................... 18
Figure 4-5: Rear Panel Electrical I/O Connections ....................................................................... 20
Figure 4-6: NEMA Electrical I/O Connections ............................................................................ 20
vi Teledyne API Model 465H O3 Monitor User Manual 06161H DCN7969
Figure 4-7: NEMA I/O Label ....................................................................................................... 21
Figure 4-8: Status Output Schematic ............................................................................................ 22
Figure 7-1: Front Panel Display .................................................................................................... 27
Figure 7-2: Front Panel Menu Diagram ........................................................................................ 3 0
Figure 7-3: Front Panel Menu Diagram ........................................................................................ 3 1
Figure 7-4: Span Cal Menu ........................................................................................................... 37
Figure 8-1: COM Configuration Jumper Settings (SW3) ............................................................. 40
Figure 9-1: Instrument Layout, Rack Mount Configuration ......................................................... 48
Figure 9-2: Instrument Layout, NEMA Configuration ................................................................. 49
Figure 9-3: Internal Particulate Filter Replacement ...................................................................... 51
Figure 9-4: Mainboard – Analog Output Configuration ............................................................... 53
Figure 10-1: Pneumatic Diagram .................................................................................................. 58
Figure 10-2: Interconnect Diagram ............................................................................................... 59
TABLES
Table 4-1: 465H Ventilation Clearances, NEMA Version ............................................................ 13
Table 4-2: 465H Ventilation Clearances, Rack Mount Version .................................................... 14
Table 4-3: Status Output Definitions ............................................................................................ 23
Table 4-4: Relay Functions ........................................................................................................... 23
Table 7-1: Alarm LED’s ............................................................................................................... 28
Table 7-2: Status LED’s ................................................................................................................ 28
Table 7-3: Alarm Configuration Properties .................................................................................. 32
Table 7-4: VARS List ................................................................................................................... 33
Table 7-5: Analog Step Test Values ............................................................................................. 34
Table 7-6: Signal I/O List ............................................................................................................. 35
Table 7-7: VIEW Menu Parameters.............................................................................................. 3 7
Table 8-1: RS-232 Connector Details ........................................................................................... 41
Table 8-2: RS-232 Port Setup ....................................................................................................... 41
Table 8-3: RS-485 Connector Details ........................................................................................... 42
Table 8-4: RS-485 Port Setup ....................................................................................................... 42
Table 8-5: Ethernet LED Definitions ............................................................................................ 43
Table 9-1: Maintenance Schedule ................................................................................................. 47
Table 9-2: Required Software ....................................................................................................... 55
Table 10-1: Status LED/Output Definitions ................................................................................. 60
06161H DCN7969 Teledyne API Model 465H O3 Monitor User Manual vii
1. INTRODUCTION
Teledyne API’s Model 465H (465H) Ozone Monitor measures high concentration ozone;
this microprocessor-controlled instrument provides fast response times with minimal zero
drift, and has built in tests and diagnostics to allow maximum uptime.
We at Teledyne API will be pleased to provide you with any support required so that you
may utilize our equipment to the fullest extent. Our full time technical support
department is always available to answer your questions.
Teledyne API, Technical Support,
9970 Carroll Canyon Road
San Diego, California 92131-1106 USA
Toll-free Phone:
Phone:
Fax:
Email:
Website:
800-324-5190
+1 858-657-9800
+1 858-657-9816
api-techsupport@teledyne.com
http://www.Teledyne-API.com
8 Teledyne API Model 465H O3 Monitor User Manual 06161H DCN7969
N
2. SPECIFICATIONS AND AGENCY
APPROVALS
2.1. Specifications
PARAMETER DESCRIPTION
Measuring principle UV absorption (Beer Lambert Law)
Ranges
Measurement Units WT%, g/Nm3
Accuracy ± 1% of Full Scale
Precision/Repeatability ± 0.5% of Full Scale
Display Resolution 0.01 WT%, 0.1 g/Nm3
Response Time (95%) < 5 seconds to 95%
Compensation Pressure, Temperature (NTP = 273.15K, 760 mmHg)
Gas Inlet Pressure Range 3.0-30.0 psig
Sample Flow Rate 0.2-2.0 LPM
Humidity Range 10-90% RH, non-condensing
Temperature Range 5-45o C
Dimensions
(H x W x D)
Weight
Power 100-240 V~, 47-63 Hz, 74 W
Environmental
Analog Output (Bi-polar) 0-5V, 4-20 mA isolated output
Status Outputs System OK, Invalid Reading, Check Lamp, Pneumatic Error
RS-232 (optional RS-485) 57.6 Kbaud, DB-9 connector
0-5 WT% to 0-25 WT%
0-100 g/Nm
5.22” x 19.0" x 15.3" (3U RETMA Panel)
(133 mm x 483 mm x 388 mm)
In NEMA 4X enclosure, typical product envelope:
16.85" x 15.60 (±0.25)" x 6.65"
(428mm x 396 (±6)mm x 169mm)
Rack Mount – 13.6 lbs (6.17 kg)
EMA 4X enclosure – 15.3 lbs (6.94 kg)
in
Installation Category II
Pollution Degree 2
For Indoor Use Only
Maximum Operating Altitude 2000 meters
3
to 0-400 g/Nm3
06161H DCN7969 Teledyne API Model 465H O3 Monitor User Manual 9
2.2. Approvals
This section presents Safety and Electromagnetic Compatibility (EMC) compliance
approvals for the Model 465H monitor.
2.2.1. Safety
IEC 61010-1:2001 (3rd Edition), Safety requirements for electrical
equipment for measurement, control, and laboratory use.
CE: 2006/95/EC, Low-Voltage Directive
2.2.2. EMC
EN 61326-1 (IEC 61326-1), Class A Emissions/Industrial
Immunity
EN 55011 (CISPR 11), Group 1, Class A Emissions
FCC 47 CFR Part 15B, Class A Emissions
CE: 2004/108/EC, Electromagnetic Compatibility Directive
2.2.3. Other Type Certifications
For additional certifications, please contact Technical Support:
Toll-free: 800-324-5190
Phone: +1 858-657-9800
Fax: +1 858-657-9816
Email: api-techsupport@teledyne.com
10 Teledyne API Model 465H O3 Monitor User Manual 06161H DCN7969
T
P
3. PRINCIPLE OF OPERATION
The detection of ozone molecules is based on absorption of 254 nm UV light due to an
internal electronic resonance of the O3 molecule. The 465H uses a mercury lamp
constructed so that a large majority of the light emitted is at the 254nm wavelength. Light
from the lamp shines down a hollow quartz tube that is alternately filled with sample gas,
then filled with gas scrubbed to remove ozone. The ratio of the intensity of light passing
through the scrubbed gas to that of the sample forms a ratio I/Io. This ratio forms the
basis for the calculation of the ozone concentration.
The Beer-Lambert equation, shown below, calculates the concentration of ozone from the
ratio of light intensities.
C
6
10
O
3
L
273
psi
695.14
n
o
Where:
I = Intensity of light passed through the sample
Io = Intensity of light through sample free of ozone
= absorption coefficient
L = path length
= concentration of ozone in parts per million
C
O
3
= sample temperature in Kelvin
= pressure in pounds per square inch (absolute)
As can be seen the concentration of ozone depends on more than the intensity ratio.
Temperature and pressure influence the density of the sample. The density of the gas
changes the number of ozone molecules in the absorption cell which impacts the amount
of light removed from the light beam. These effects are addressed by directly measuring
temperature and pressure and including their actual values in the calculation. The
absorption coefficient is a number that reflects the inherent ability of ozone to absorb 254
nm light. Most current measurements place this value at 308 cm-1 atm-1 at STP. The
value of this number reflects the fact that ozone is a very efficient absorber of UV
radiation which is why stratospheric ozone protects the life forms lower in the
atmosphere from the harmful effects from solar UV radiation. Lastly, the absorption path
length determines how many molecules are present in the column of gas in the absorption
cell.
06161H DCN7969 Teledyne API Model 465H O3 Monitor User Manual 11
The intensity of light is converted into a voltage by the detector/preamp module. The
voltage is converted into a number by a high resolution A/D (analog-to-digital) converter.
The digitized signal, along with the other variables, is used by the CPU to compute the
concentration using the above formula.
12 Teledyne API Model 465H O3 Monitor User Manual 06161H DCN7969
4. GETTING STARTED
The 465H is shipped with the following standard equipment:
Power cord (Rack mount version only.)
Instruction manual.
Flow Control Assemblies (2X.)
Upon receiving the 465H, verify that there is no apparent shipping damage. (If damage
has occurred please advise shipper first, then Teledyne API.)
CAUTION
Connect the exhaust fitting on the rear panel to a
suitable vent outside the monitor area.
4.1. Mechanical Installation (for Monitors in
NEMA 4X Enclosures)
Mount the enclosure securely to a vertical surface.
Figure 4-1 shows the locations of the four mounting holes, which are 0.32”
(8.128 mm) diameter.
All four mounting holes should be used to secure the monitor.
Use stainless steel, 5/16” (8 mm) diameter bolts.
4.1.1. Ventilation Clearance
When installing the 465H be sure to leave sufficient ventilation clearance.
Table 4-1: 465H Ventilation Clearances, NEMA Version
Area Minimum required clearance
Back of the monitor None
Sides of the monitor 1 inch
Above and below the monitor 1 inch
06161H DCN7969 Teledyne API Model 465H O3 Monitor User Manual 13
Figure 4-1: 465H Mounting Hole Locations and Dimensions
4.2. Mechanical Installation (19” Rack Version)
The Rack Mount version of the 465H was designed to be operated as a bench-top monitor
or to be mounted in a standard 19” RETMA instrumentation rack. For rack installations,
the four mounting feet should be removed from the bottom of the monitor.
4.2.1. Ventilation Clearance
When installing the 465H be sure to leave sufficient ventilation clearance.
Table 4-2: 465H Ventilation Clearances, Rack Mount Version
Area Minimum required clearance
Back of the monitor 3 inches
Sides of the monitor 1 inch
Above and below the monitor 1/2 inch
14 Teledyne API Model 465H O3 Monitor User Manual 06161H DCN7969
4.3. AC Power Connection (for Monitors in
NEMA 4X Enclosure)
WARNING: Electrical Shock Hazard
Disconnect power to the AC mains before making or removing
A proper earth ground connection must be made to the
receptacle labeled “Earth Ground” on the 3 pin AC connector.
Failure to do so may result in a shock hazard and malfunction
4.3.1. Wiring Requirements for NEMA Enclosures
Use appropriate wiring rated for this type of equipment, ensuring that it meets local and
national safety and building requirements.
any electrical connections to the 465H.
WARNING: Electrical Shock Hazard
of the monitor
Ensure that overcurrent protection is used (a 5 A circuit breaker is recommended), and
that it fulfills the following requirements:
belocatedasneartotheinstrumentaspossible
quicklyandeasilyaccessible
clearlylabeledasthedisconnectingdeviceforthisinstrument
4.3.2. Wiring Instructions
1. Install a ½” conduit fitting for routing the electrical wiring into the monitor
through the hole provided in the bottom face of the NEMA enclosure; an
appropriate sealed conduit connector should be used.
2. Attach the leads of the power line to the AC power connector (see Figure 4-6).
06161H DCN7969 Teledyne API Model 465H O3 Monitor User Manual 15
3. For the NEMA configuration, the electrical connection must be hard-wired to the
3-pin connector on the mainboard labeled J23. AC power connection to the
monitor should be made with 12-14 AWG stranded copper wire, connected to the
monitor as follows:
a. Earth Ground (green): Connect the earth ground wire to the screw terminal lug on
the chassis as shown in the Figure below. Do not connect
the earth ground wire directly to the PCB connector on the
mainboard PCB.
b. Line (Black): Connect the Line wire to the connector on the mainboard
PCB labeled “Line”.
c. Neutral (White): Connect the Neutral wire to the connector on the
mainboard PCB labeled “Neutral”.
Figure 4-2. NEMA AC Power Connection to Monitor
4. Connect the power cord to an appropriate power outlet (see the serial number tag
for correct voltage and frequency).
Verify that the instrument is set up for proper line voltage and
frequency. Observe local electrical codes when connecting
power to the monitor.
16 Teledyne API Model 465H O3 Monitor User Manual 06161H DCN7969
WARNING
5. Turn on the 465H by switching the switch on the left side of the rear panel, or
applying power to the monitor (NEMA configuration.) The front panel display
should light with a sequence of messages, including the instrument serial number
and software revision. (When the instrument first powers up, the display will
show ‘xxxx’, indicating that the instrument is in start-up mode, waiting for the
UV detector readings to stabilize).
After the start-up period, the instrument will begin displaying the ozone concentration
and the optional stream selector will begin operating, if installed.
4.4. Pneumatic Connections
Figure 4-3: Pneumatic Connections, Rack Mount Configuration
06161H DCN7969 Teledyne API Model 465H O3 Monitor User Manual 17
Figure 4-4: Pneumatic Connections, NEMA Configuration
4.4.1. Installing Flow Control Assemblies
Two (2) Flow Control assemblies are supplied separately from the monitor, these are
used to control the flow into the monitor. These Flow Control Assemblies will supply a
fixed flow into the monitor that is dependent on gas supply pressure.
Alternately, customer supplied needle valves can be used in place of these Flow Control
Assemblies if an adjustable flow control is desired. Use only needle valves that are
constructed of materials compatible with high concentrations of ozone, such as stainless
steel and Teflon.
Attach the Flow Control Assemblies by screwing them onto the threaded fittings of the
ozone inlet and the zero gas inlet (see Figure 9-1 and Figure 9-2).
Hand-tighten orifice assemblies until snug.
With a 9/16” open-end wrench, tighten each orifice assembly 1/8–1/4 turn. Use a
1/2” back-up wrench to anchor the fittings of the zero gas and ozone inlet ports in
place.
Do not over tighten the fittings.
NOTE
Both flow control assemblies are identical and interchangeable.
18 Teledyne API Model 465H O3 Monitor User Manual 06161H DCN7969
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