Cochabamba, Mayo de 2002. Nº 6 MEDICIÓN RADIOACTIVA

Transcription

Cochabamba, Mayo de 2002. Nº 6
SENSORES:
♦
Temperatura
♦
Nivel
♦
Caudal
♦
Presión
♦
LLama
♦
Proximidad o fin de carrera
♦
Peso
♦
Ph, conductividad % de
oxígeno disuelto, turbiedad
♦
Análisis de gases
ACTUADORES:
♦
Motores
♦
Reductores
♦
Bombas
♦
Válvulas
♦
Variadores de frecuencia o
AC Drives
♦
DC Drives o variadores de
velocidad para motores de
corriente continua
♦
Variadores de voltaje
♦
Cilindros
neumáticos
e
hidraúlicos
♦
Válvulas
direccionales
neumáticas e hidráulicas
CONTROL INDUSTRIAL:
♦
PLCs
o
controladores
programables
♦
RTUs o unidades remotas
para sistemas SCADA
♦
Controladores
independientes o de lazo
♦
MMIs o interfases HombreMáquina
♦
Software
de
monitoréo
Industrial
♦
Radio Modems
♦
Teclados Industriales
♦
Computadoras Industriales
ELECTRICOS:
♦
Contactores
♦
Disyuntores
♦
Termomagnéticos
♦
Reles térmicos
♦
Bancos de Capacitores
♦
Relays Electromecánicos y de
estado sólido
♦
Medidores Multifuncionales
♦
Medidores y Monitores de
parámetros eléctricos
♦
Seccionadores
♦
Celdas de media tensión
♦
Cables
de
fuerza
e
instrumentación
♦
Transformadores de potencia
♦
Fusibles
♦
Tableros Eléctricos
♦
Botoneras,
switches
y
lámparas piloto industriales
CURSOS :
♦
Programación
Básica
de
PLCs
♦
Programación Avanzada de
PLCs
♦
Programación de Software de
Monitoreo Industrial
♦
Ingeniería de Automatización
y Control
♦
Instrumentación
♦
Equipos
Eléctricos
para
Control Industrial
♦
Programación de Interfaces
Hombre – Máquina
♦
Instrumentación Endress +
Hauser
♦
Programación TopKapi
♦
Programacion
MODPAC
(Radio Modems)
MEDICIÓN RADIOACTIVA ENDRESS + HAUSER
•
Medición de Nivel en Separadores de Alta Presión ............................ 1
•
Medición de Nivel de Interface Vapor/ Crudo / Agua .......................... 1
MEDICIÓN ECONÓMICA CON RADAR ENDRESS + HAUSER
•
Medición de Nivel en Tanques ...............................................................2
DETECCIÓN DE GASES COMBUSTIBLES SCOTT ................................................... 3
MEDICION DE NIVEL ELECTROMECÁNICA VAREC ................................................ 8
VARIOS:
♦
Gabinetes
♦
Contadores
♦
Temporizadores
♦
Colas de chancho (PIG TAILS)
♦
Válvulas
para
alivio
de
seguridad
♦
Reguladores de presión
♦
Dispays Digitales
MEDICION DE NIVEL CON SERVOMECANISMO VAREC ........................................ 12
Medición Radioactiva
Parameters:
The benefits of these solutions are:
For an efficient separation, several parameters
are important to be measured.
Level continuous, to control the overall liquid
level.
Level limit, to detect safety shutdown levels.
Interface level, to control the drain of water
and oil.
• One (instead of two) sources for continuos measurement and
limit detection.
• Limit levels can be adjusted from the control room by software.
Detectors don’t have to be shifted mechanically any more.
• In case of any malfunction in one measuring system, the
second measuring system can be used to operate the process
continuously without any shutdown.
• High pressure separator / test separator
Redundant level measurement /switch
Level continuous and level limit:
Both can be combined in a redundant system
Consisting of one source and 2 independent
Detectors. The detectors are mounted in
parallel and cover the full measuring range.
Each system would be able to supply the level
signal to control the process. Also each system
would be in a position to provide limit switches
for a safety shutdown.
source
Two redundant detector
Easy Adjustment
One
2 x continuous
4
Interface level measurement:
For an interface level measurement an internal
Source is required. It is placed in a dip well. The
Source container is positioned on top of the
Separator.
For maximum safety, i.e. during maintenance,
the source will be parked in the source
container.
The detectors are mounted in a horizontal
Position to measure the radioactive absorption of
Water and oil. Due to the different densities of oil
and water, a clear interface can be determined.
To guaranty the best engineering solution it is
Recommended to involve our experienced design
Engineers at an early stage.
The benefits of these solutions are:
• Easy installation of the system.
• Not effected by changes of liquid properties as
by using other physical principles like Radar or
Capacitance (admittance)
x limit switch
• Only one time calibration is needed. An automatic decay
compensation is implemented.
• Different filling nozzles does not effect the system
• The use of different bore holes does not effect the system
• High pressure separator / test separator
Interface Measurement
Internal Source for maximum
resolution and minimum
radiation
Continuous interface
Measurement / swithch
Depending on Tank Size 2
Detectors might be best
Best linearity
Pag. 1
Medición Económica con Radar
Measurement parameters:
Benefits of measurement with RADAR:
- High precision, +/- 3 mm
- Non contact measurement
- Largely uneffected by ambient
conditions e.g. pressure,
temperature, agitators, low DK
- Easy to install
- No moving parts
- Minimal opening
Application
- Horizontal cylinders, pipes
- Oil condensate battery
- Oil water separators
- LPG tanks
- Radar for easy commissioning
and reliable measurement
- For all measurements of media
with low DK(>1.4) and low
viscosity
- 27 mm outer tube diameter
- Length adapted to application,
max 7.6 m
- Calibrated ex works
- Dead zone at the pipe end is
reduced to 5 cm
- Process connections 1 1/2"
thread/ flange
- 40 bar, 150 0 C rating
Limitation
- Liquid with interface e.g. water / oil, upper liquid with low DK requires > 5 cm to be
measured
- High viscosity liquids > 500 cSt which tend to create build up
- Ammonia
Pag. 2
Detección de Gases Combustibles
Protecting your plant's people, process, and the surrounding
environment is your gas detection system's primary function but knowing which method to use can help improve your
facility's bottom line.
Many different gas detection technologies
exist to help today's industry meet building
and fire code requirements; each of these
technologies has advantages and
disadvantages. After reading the
following overview of the most popular
technologies, we think you’ll agree that there
is no “one best way” — rather, the best gas
detection system generally is a hybrid
tailored to your company's specific situation.
Electrochemical and Catalytic Instruments
Electrochemical gas sensors contain various components designed to
react with a specific toxic gas; the reaction generates a current which is
measured by the instrument and translated into a concentration value
(PPM or PPB).
Catalytic sensors “burn” combustible gases on a small catalytic bead;
the instrument measures the resulting increase in resistance and
translates it into percent of lower explosive limit
(LEL).
Advantages. Because of their Comparatively low cost, electrochemical
and catalytic instruments typically are used “at the source” (i.e.,
wherever leaks are likely to occur).
Response to leaks is therefore quick and monitoring is continuous (i.e.,
leaks cannot be
“overlooked” due to sequence sampling). In
addition, there are no moving parts that can cause mechanical failure.
Disadvantages. Some sensors respond to gases other than those they
are designed to measure (“interferents”), so care is necessary during
design and installation to avoid using these sensors in areas where
interferents could be present.
Sensors typically require quarterly calibration, and generally need to be
replaced after one to two years. In addition, several brands of sensors
use a liquid electrolyte that must be refilled at regular intervals.
Paper Tape Instruments
Paper tape instruments use chemically-impregnated tape to detect toxic
gases. Much like a piece
of litmus paper, the tape changes color when exposed to a given gas;
the color change is detected by a
photocell, analyzed, and translated into a concentration value.
Advantages. As a result of the color change reaction, paper tape
instruments provide physical evidence of a gas leak (versus
electrochemical, catalytic, solid state, and FTIR instruments, which only
send out a 4-20 mA signal).
Typically, they are also somewhat less prone to interferences than
electrochemical and solid state instruments, providing slightly more
specificity. In addition, paper tape devices typically can detect more
gases than electrochemical instruments.
Disadvantages. Paper tape instruments can only be used for toxics —
they cannot detect combustible gases such as hydrogen. Because of
their high cost, paper tape instruments are typically kept in a central
location and connected to multiple detection points through sample
tubing; samples are pumped from each individual point in sequence.
As a result, significant lag times can exist between a leak and its
detection, and sequencing can cause the instrument to overlook
some leaks. In addition, reactive gases (such as HF, Cl 2 , HCl, and
NH 3 ) are easily adsorbed on tubing, which can prevent the
instrument from "seeing" a leak. Mechanical failure is always an
issue with paper tape detectors (the cassette drive can jam, the
optics can foul, pumps can fail, filters can plug, and flows can
become unbalanced), and regular preventative maintenance is
required. Regular calibration of the optics is also necessary.
Manufacturers recommend that tapes be replaced every 2-4 weeks
— although this is a simple process, the cost of purchasing and
disposing of tapes can be high.
Solid State Instruments
Solid state sensors are made of a metal oxide (typically tin-oxide)
material that changes resistance in response to the presence of a
gas; the instrument measures this resistance change and translates
it into concentration.
Advantages. Solid state sensors have a very long lifetime, typically
10 years. They can detect a wide range of gases, including many
that electrochemical and paper tape instruments are unable to see.
Because they are fairly inexpensive, solid-state instruments typically
are used to detect gas at the source, so response to leaks is quick
and monitoring is continuous. In addition, they have no moving
parts that can cause mechanical failure.
Disadvantages. While solid state sensors can detect a wide range
of gases, they have very low selectivity - so the possibility of “false
alarms” is significantly higher than with other technologies. In
addition, when they have not been exposed to gas for some time,
some solid state sensors oxidize and “go to sleep,” meaning that
they will not respond to real gas leak. Solid state sensors also
provide a non-linear output, so calibration is more difficult and timeconsuming than it is with electrochemical sensors (which have a
linear output).
FTIR Instruments
Fourier-transform infra-red instruments use spectrophotometric
techniques to detect gas. Infra-red light is shined through a sample,
and the resulting absorbance spectrum is analyzed to determine its
constituents.
Advantages. FTIR is the most accurate gas technique commonly
used, providing good sensitivity and low risk of false alarms. No
consumables are involved, so ongoing maintenance costs are less
than with other technologies.
Disadvantages. Because of their high cost, FTIR instruments are
typically kept in a central location and connected to multiple
detection points through sample tubing; samples are pumped from
each individual point. As a result, significant lag times can exist
between a leak and its detection. In addition, reactive gases (such
as HF, Cl 2 , HCl, and NH 3 ) are easily adsorbed on tubing, which
can prevent the instrument from “seeing” a leak.
Mechanical failure is also an issue with FTIR instruments — the
rotating shutter can wear and/or jam, and the
pump can fail.
Pag. 3
GasPlus-IR
Model 4688-IR Combustible
Gas Transmitter
The Model 4688 IR is a rugged, reliable solution for hydrocarbon gas
detection. Designed with extensive user input, the instrument is extremely
flexible, easy to use, and easy to maintain. The GA GAS PLUS IR is suitable
for most applications where catalytic bead detectors are currently used – as
well as some applications where catalytic sensors won’t work.
Principle of Operation
An infrared source emits pulses of radiation into the instrument’s “optical
bench”, which contains a known volume of gas. This radiation is reflected
onto two detectors, one tuned to measure a wavelength absorbed by
organics and the other tuned to a reference band that is not absorbed. The
outputs of the detectors are compared and used to compute gas
concentration. Fault conditions are detected by the sensors when radiation
intensity falls below a threshold level for a set period of time.
Features... .. ..
Low Maintenance No span calibration required. Zero adjustment a quick,
non-intrusive procedure.
Flexible
Many parameters are user-adjustable, including gas to be detected,
decimal precision, damping, and engineering units.
Rugged Design
Conformally coated electronics, nickel plated optics protects components
against corrosion, and harsh industrial environments.
Extensive Self Diagnostics
Instrument compensates for detector contamination and aging. Optics
are heated to prevent moisture formation. Detailed fault codes aid in
troubleshooting.
Multiple Output Choices
4-20mA and RS/485 (Modbus protocol) outputs are standard features.
Relays with user adjustable set/reset points, and time delays are vailable
as an option.
USE AND MAINTENANCE
Operation of the 4688IR is simple and
intuitive. All settings and adjustments,
such as alarm setpoints, gas measured,
etc., are non-intrusive, performed at the
instrument with a magnetic screwdriver –
or remotely through the instrument’s
RS/485 interface. Password protection
prevents unauthorized personnel from
tampering with the settings.
Minimal maintenance is necessary. All
span information is preset at the factory,
and never needs to be adjusted. Zero
adjustment is a quick, non-intrusive
procedure.
On-board
diagnostics
continuously
check
transmitter
electronics, optics, and software for faults
and indicate corrective action should a
fault be detected. The field serviceable
infrared emitter is replaced with a simple
plug-in connection .
User-Friendly Display
Large LCD display shows gas concentration, engineering units (%LEL or
%v/v), alarm relay status, alarm inhibit, and more.
Low Cost of Ownership
An excellent price/performance ratio and low long-term cost of
ownership.
Pag. 4
Why IR?
IR technology provides numerous advantages that
may be benificial for your application’s conditions
• Reduced maintenance (no span calibration required).
• No saturation from high gas concentrations
• No oxygen required for operation
• Continuous sensor fault monitoring
• Sensor lifetime not reduced by exposure to gas
• Rapid speed of response
• Minimal temperature and humidity effects
Typical Specifications
1. General. Transmitter shall be approved by a nationally
recognized testing laboratory for Class 1, Division 1 Group B, C,
and D hazardous locations. All parameter settings shall be
password protectable. A large integral display shall provide visual
indication of gas concentration, engineering units, alarm relay and
inhibit status.
2. Temperature and Power. Transmitter shall perate over an
input range of 18-28VDC in ambient conditions of -40 C to 60°C
and shall consume no more than 4.0 W maximum.
3. Output. Transmitter shall provide an isolated, 4-20mA signal,
and shall be digitally addressable using MODBUS protocol with
RS/485 or RS/232 data transmission. Two SPST alarm relays
shall be available as an option. User shall be able to separately
adjust alarm set points, reset points, set delays, and reset delays.
All alarm parameters shall be password protected and be nonintrusively adjustable through transmitter’s front panel via a
manufacturer supplied magnet.
4 Diagnostics. Transmitter shall conduct self-diagnostics of
electronics, software, and sensor at least twice per second. Fault
conditions shall be indicated with a specific fault code on the
instrument display and with a user-adjustable analog signal. One
SPST fault relay shall be available as an option. User shall be
capable of testing the alarm and fault relays from the instrument’s
front panel or remotely via RS-232 / RS-485 communications
interface.
5. Calibration. All span calibration data shall be preset, with no
additional span calibration required by user. Non-intrusive zero
calibration shall be performed via magnet. Transmitter shall
provide the ability to inhibit its output. A time-out feature shall
automatically return the unit to normal operation mode after a
preset amount of time. The calibration curve for the gas being
monitored shall be user selectable in the field through the
transmitter’s front panel via a manufacturer supplied magnet.
6. Sensor. Sensor shall be non-dispersive infrared type using no
moving mechanical parts. Linearity and repeatability shall be
±2%LEL below 40% of full scale, and ±5%LEL at or above 40% of
full scale. Infrared emitter shall be field replacable.
Ordering Information
Model 4688IR - A - B - C- D - E - F - G
Includes Rainshield
A: Gas Type
1 - Standard Gases (built-in)
• Butane 0-100% LEL or 0-1.9% v/v Note 1
• Ethane 0-100% LEL or 0-3.0% v/v
• Hexane 0-100% LEL or 0-1.1% v/v
• Methane 0-100% LEL or 0-5.0% v/v
• Pentane 0-100% LEL or 0-1.5% v/v
• Propane 0-100% LEL or 0-2.1% v/v
• Propylene 0-100% LEL or 0-2.0% v/v
2 - Extended Gas Set 1 Specify gas(es) 2 - (includes
standard gases but not extended gas set 2)
• Acetone 0-100% LEL or 0-2.5% v/vv
• MEK 0-100% LEL or 0-1.5% v/v
• Isopropyl Alcohol (IPA) 0-100% or 0-2.0%v/v
• Pure Methane 0-100% v/v
• Methanol 0 - 100% or 0 - 6% v/v
• Toluene 0-100% LEL or 1.1%v/v
3 - Extended Gas Set 2 Specify gas(es) (includes
standard gases but not extended gas set 1)
• Butadiene 0-100%LEL or 0-2% v/v
• Ethylene 0-100% LEL or 2.7% v/v
• Ethanol 0-100% or 3.3% v/v
• Isobutanol 0-100% LEL or 1.7% v/v
• Hexane 0-20% v/v NOTE 2
• Benzene 0-100% LEL or 1.2 % v/v
• Xylene 0-100% LEL or 1.1v/v
4 - Other Gases (contact factory)
B: Remote Display/User Interface
1 -Display integral with transmitter
2 -Remote display/user interface
with junction box - 50’ (15.2 meters) max separation
C: Digital Protocol
1 - RS-485 Note 3
2 - RS-232
D: Relays (non-failsafe mode of operation)
1 - None
2 - All Normally Open (NO)
3 - All Normally Closed (NC)
4 - Alarm NO, Fault NC
5 - Alarm NC, Fault NO
E: Optics Material
1 - Nickel Plated aluminum
2 - Stainless Steel
F : Rating NOTE 4
1 - Non CENELEC approved transmitter
2 - CENELEC approved transmitter
G: Rainshields
1 - Standard
2 - Flowcell (Nitrile O-ring)
3 - Flowcell (Viton O-ring)
4 - Flowcell (ethylene propylene)
Pag. 5
Accessories
Optical Bench Assembly
Part #
Description
077-0120
EIT magnetic
screwdriver
RS-485 Termination
Board
¼ turn flowcell Note 2
096-2201
096-2191
Requires Gas Test Adaptor,#096- 2192)
074-0321
096-2192
096-2289
096-2187
096-2190
096-2215
096-2214
077-0161
096-2143
Rainshield
Gas Test Adaptor
Bump Test Adaptor
Zero Adjustment Kit
(includes regulator,
tubing, and carrying
case - does NOT include
methane "bump gas")
Gas test kit (2 ft tubing,
zero air and methane
“bump” gas”, cal
adaptor, regulator, and
carrying case)
Porex dust filter (for
rainshield) pack of 5
Porex dust filter (for
sensor) pack of 5
Emitter replacement tool
IR Emitter (plug-in,
includes emitter
GasPlus Alarm System
Engineered to handle difficult industrial enviroments yet
incredibly easy to operate and maintain, the Gas Plus Alarm
System provides visual and audible local alarm
annunciation in a rugged steel enclosure.
Designed for easy use and maintenance, the Gas Plus
Alarm System can be equipped with either the Scott
Instruments Model 4600 Gas Plus Universal Toxic Gas
Transmitter, the Model 4688IR Infrared Combustible Gas
Transmitter, or the Model 4679IR CO 2 transmitter.
Built-in strobe lights and an 80 db horn respond to two levels of
alarm to quickly alert personnel of dangerous, build-ups of toxic
or combustible gas. Three 10 amp relays provide additional
response support for your facility, and a front panel light
provides continuous visual indication of system status.
The built-in 110 Vac power supply provides simple plug-in
electrical connection. Since all system adjustments
are non-intrusive, the rugged painted or stainless steel
enclosure never needs to be opened after installation.
Pag. 6
I
Technical Specifications
INSTALACION DRAWINGS
GENERAL
Sensor Type_______________Non-dispersive infrared
Detection Range ___________See “Ordering Information”
Linearity _________________± 2% below 40% full scale
± 5% from 40% to 110% full scale
Repeatability _____________ ± 2% below 40% full scale
± 5% from 40% to 110% full scale
Response Time ___________ T90 < 5 seconds (without rainshield)
Start Up Time ____________ 30 seconds
Self-Diagnostic Test _______ 2x per second
Calibration _______________ Span: none (factory set)
Zero: every 3 to 6 months
User Interface ____________ Non-intrusive via magnet
Display __________________4 digit LCD with user-adjustable
contrast. Numeric display of gas
concentration and faults; icons for
alarms, lock, and inhibit
Weight __________________ 6.5 lbs (3.0 kg)
Warranty_________________ 2 years
OUTPUTS
Analog___________________ Isolated, 4-20mA, max loop load
900W at 24 VDC (current source or
sink)
Programmable Fault ________ 2.4 to 4.0mA
Programmable Inhibit _______ 1.5 to 20.0mA
Programmable Loop Test ____ 1.0 to 20.0mA
Digital ___________________ RS/485 or RS/232 using Modbus
RTU or Modbus ASCII protocol
Relay (optional) ___________ 3 SPST relays (2 concentration, 1
fault), 5A at 250 VAC. User-selectable
Latching/nonlatching,
energized/de-energized, set/reset
delay, and set/reset point
ELECTRICAL
Input Voltage_____________ 18-27VDC
Power Consumption _______ 3.1W, nominal / 6.0W, max
Connections _____________ 3 wires or 4 wires (with RS/485 or
RS/232 configuration ); 18-22 AWG
nominal
RFI/EMI ________________ certified to EN50082-1
ENVIRONMENTAL
Operating Temp __________ -40°F to 140°F (-40°C to 60°C)
Operating Humidity _______ 0 to 100% RH
ENCLOSURE
Enclosure Material________ Copper-free cast aluminum, baked
epoxy finish
Optical Bench Material_____ Stainless steel or electroplated
aluminum
APPROVALS
Enclosure ______________ Explosion proof; UL/FM/CSA, Class
1 Group B,C,D / Class 2, Group E, F
/ Class 3, NEMA-4X, NEMA-7B, C,D;
NEMA-9 E,F,G; IP66
System ________________ ETL listed to UL2279 and UL3111-1
(Class 1, Div 1, Group B,C,D ),
CE Marked
CSA approved to Class 1, Zone
1,Groups IIB+H2;Class I, Groups
E,F,&G; Class III
CENELEC approved to EExd[ib] IIc T6
Pag. 7
Medición de Nivel Electromecánica
2500 Automatic Tank Gauge
Mechanical float gauge for continuous - level measurement in storage tanks
Application
Installation
Typical 2500 installations - low pressure
The Model 2500 Automatic Tank Gauge is a float and tape operated
instrument designed to provide continuous liquid
level measurement in bulk storage applications.
Endress+Hauser Systems & Gauging has maintained this simple and
reliable product, which has been the market leader in float and tape
instrumentation for over 20 years.
The 2500 has various installation options and a complete range of
accessories to suit user accuracy and installation requirements for virtually
every application, including:
• Cone roof tanks
• Floating roof tanks, floatwell type
• Floating roof tanks without floatwell
• Fixed roof tank
• Bolted cone roof tank
• Cone roof tank with internal floating
roof and pan
• Underground tanks
• Tank top or tank side
Features
• 0.2” (4 mm) level gauging accuracy per SIRA Report
E1588583
• Low cost continuous measurement – units of
measurement to suit your requirements - Metric or
Imperial in decimals or fractions
• Wide variety of material available for extreme products or
environmental conditions
• Cone roof, floating roof and bolted tank kits available for
stilling wells or water interface applications
• Mounting for optional transmitters or limit switches for
future site upgrades
• Gaugehead/counter suitable for oil filling
Right:
Floating roof tank,
Floatwell type
Left:
Cone roof tank
Right:
Top mounting for
Fixed roof tank
Left:
Floating roof tank
Without floatwell
Right:
Cone roof tank with
internal floating roof
And pan
Left:
Bolted cone roof tank
Measuring System
Operation
As standard, a large 14.5” (368 mm) diameter Type 316 stainless steel
hollow shell float is used to detect the liquid level, which is attached to the
stainless steel perforated tape. The float follows the
liquid level as it rises and falls due to the constant pullback tension provided
by a powerful negator spring motor or cartridge motor. The precisely
perforated tape engages pins on a sprocket wheel which in turn drives the
counter assembly and any shaft position devices attached to the gaugehead,
such as a transmitter. This simple design and operation allows the gauge to
operate with negligible maintenance throughout its working life.
Standard and optional features dial counter
Endress+Hauser offer imperial fractional, imperial decimal and metric
counter displays. Imperial reading gauges are manufactured with a reversible
fractional/decimal dial. If the customer desires a decimal level display, the
dial can
be removed and turned over to the decimal side and reinstalled. All
dial/counters reflect product innage. For outage reading requirements,
Endress+Hauser offer a modification kit (P/N 13-08774) for imperial unit of
measure.
Right: Installation with 226 Manhole cover
Left: Installation with 228 inspection cover
Pag. 8
Accessories
2546 Teflon Tape Wipe
Part # BA 13924
Generally used with the conduit vent, the tape wipe can also be used
alone. The wipe mounts in the conduit between the top of the tank and
the first elbow and removes excess residue from the tape. It minimizes
vapor loss from the tank into the conduit and helps prevent vapors and
liquids from contaminating the gaugehead.
Dual Calibrator Assembly
Part # 13-0894 8
The dual calibrator allows level transmitters with absolute encoders to
be calibrated without disassembling the transmitter from the
gaugehead. The calibrator is accessed by removing the counter
assembly cover. By simply turning the calibrator, the counter and the
transmitter can both be set to the proper level. The dual calibrator can
be retrofitted to existing installations.
2542 Tape Conduit Vent
Part # 1M40844
This vent is designed for use on liquid level gauging
installations on storage tanks where corrosive vapors
are involved. The unit vents gauge piping to the
atmosphere, thereby preventing vapors from entering
the gaugehead. Special construction is designed to
prevent damage to the vent due to pipe alignment.
Communication options
Transmitter Model 4000 ATT
Model 8200
Limit Switch Model 2557
Extended Range Kit
Part # 13-08772 (English) # 13-08773 ( Metric)
The extended range kit provides an extra long gauge tape and negator
motor to extend the range to 29 m (96 feet). It is not available for
Cartridge equipped gauges.
Outage Conversion Kit
Part # 13-08774
This kit allows the conversion of standard inage reading gauges to
outage. It is only available for imperial gauges.
Imperial to Metric Conversion Kit
Part # BM16541
Right:
Shock Absorber
Left:
2545 Condensate
Reservoir
Provides necessary parts and instructions for converting
imperial gauges to metric gauges. Metric tape must be
purchased separately.
2545 Condensate Reservoir
Part # BM4O51
The condensate reservoir is designed to collect condensate that would
otherwise accumulate in the gaugehead. Its use is recommended where
an excessive amount of condensate could develop.
Shock Absorber
Part # DA6138
Reduces wear and maintenance on series 2500 automatic tank gauges
by minimizing transfer of wave energy from the float to the perforated
tape and gaugehead components. Prevents the float from becoming
detached from the tape by wave action. Should always be used in tanks
with turbulent conditions near inlet or outlet piping and near a mixer.
Right:
Tape Conduit Vent
Left:
Oil Seal
Pag. 9
Technical Specifications
Service type
Float specifications
Liquid seals
Technical
specifications
Description
Severe
Extreme Extreme
(NaOH ) (H2SO4)
Gaugehead
Aluminum Aluminum Cast Iron Cast Iron Cast Iron
Sheave Elbows Aluminum 316 S.S
Cast Iron
Cast Iron Cast Iron
Top Anchors
Steel 316 S.S.
Steel
Steel
Stl/Carp. 20
Bottom Anchor Steel 316 S.S.
316 S.S.
Monel
Carp. 20
Guide Cables
316 S.S.316 S.S.
316 S.S.
Monel
Carp. 20
Perforated Tape 316 S.S.316 S.S.
316 S.S.
Monel
Carp. 20
Hollow Shell Float 316 S.S.316 S.S.
316 S.S.
Monel
Carp. 20
Part Number
BM9074-000
BM12339-000
BM12338-000
Standard
Moderate
Material
316 S.S.
Carp. 20
Monel
Net Weight
8.8 lb (4 kg)
10.7 lb (4.9 kg)
10.5 lb (4.8 kg)
Size
14.5“ (36.8 cm)
17” (43.2 cm)
10 lb (4.4 kg)
Max Working Pressure Part Number Service
Aluminum Sheaves, Steel Pipe 8.5” (21.6 cm) W.C.
Cast Iron Sheaves, Steel Pipe 8.5” (21.6 cm) W.C.
Aluminum Sheaves, Steel Pipe 27” (68.6 cm) W.C.
10-01994-AAA Standard
10-01994-BAA Severe
10-02861-AAA Standard
Product Gravity Range
Service Rating
Gauging Range
Extended Range
Shipping Weight
Sheave Elbows
0.7 to 1.9 (specific gravity)
Atmospheric to 2.5 psig
0 – 60 ft (18 m)
0 – 96 ft (29 m)
Fixed Roof Tanks
Requires Kit 13-08772 (Imperial) or 13-08773 (Metric)
Varies with model – 70 lb (32 kg) to 110 lb (50 kg)
90° Aluminum Sheave
06-0856
90° Cast Iron Sheave
BM4675
90° 316 Cast Iron Sheave
BM5074
BM3480
BM3481
Aluminum Tape Carrier
BM3621
Pag. 10
Aluminum gaugehead - English configurationnegator motor
Aluminum gaugehead – Metric configuration –
negator motor
Tank type
01 Standard service cone roof tank
02 Standard service cone roof tank & pan & floatwell
03 Standard service floating roof tank & floatwell
04 Standard service tank top mounting
05 Standard service bolted tank
06 Standard service floating roof tank; no floatwell
07 Standard service cone roof tank & pan; no floatwell
41 Moderate service cone roof tank
51 Interface service cone roof tank; 15 min s.g. differential
55 Stilling well service cone roof tank 6" dia. Float
250001
Tank type
250003
Aluminum gaugehead – English configuration –
float crank
float crank
Tank type
250002
Tank type
250004
Iron gaugehead – English configuration
Iron gaugehead – Metric configuration
Tank type
21 Severe service cone roof tank
22 Extreme service cone roof tank; monel
23 Extreme service cone roof; tank carp.20
250005
Tank type
31 Severe service cone roof tank
33 Extreme service cone roof tank; monel
34 Extreme service cone roof tank; carp.20
250006
Aluminum gaugehead – English configuration –
cartridge motor
cartridge motor
Tank type
250011
Tank type
250013
Pag.11
9
Steel Gaugehead – English Configuration – 150 PSIG
Steel Gaugehead – Metric Configuration – 150 PSIG
Tank type
01 Tank spheres to 16’ (4.9 m) diam. or horizontal cylinders tank
02 Tank spheres to 48’ (14.6 m) diameter
03 Top mounting on tank sphere or horizontal cylinder tank
Tank type
Plug Valve
0
Plug Valve not used
1
1-1/2” (38 mm) Plug Valve (Viton -A plug)
Plug Valve
0
Plug Valve not used
1
Transmiter Adapter
0
Transmitter Adapter not used
1
2581 Transmitter Adapter
252001
Transmiter Adapter
0
Transmitter Adapter not used
1
2581 Transmitter Adapter
252002
Steel Gaugehead – English Configuration – 300 PSIG
Steel Gaugehead – Metric Configuration – 300 PSIG
Tank type
Tank type
Plug Valve
0 Plug Valve not used
1 1-1/2” (38 mm) Plug Valve (Viton -A plug)
Plug Valve
0
Plug Valve not used
1
Transmiter Adapter
0 Transmitter Adapter not used
1 2581 Transmitter Adapter
252003
Transmiter Adapter
0 Transmitter Adapter not used
1 2581 Transmitter Adapter
252004
Medición de Nivel con Servomecanismo
State of the art technology
Design, accuracy and reliability make the Proservo NMS 53
series of tank gauges the optimum choice for centralized
measurement across various tank gauging applications.
With a continuous program of engineering development,
Endress+Hauser Systems & Gauging has utilized the latest
microtechnology to keep the design simple, lightweight and
compact. The Proservo NMS can be relied upon to provide
outstanding sensitivity for correct level detection with consistent
resolution. It provides a measurement accuracy of (.03”) 0.7mm
to fulfill the exacting demands of tank inventory management.
Pag.12
Application specific
solution
Endress+Hauser
have developed the
Proservo NMS to be
as complicated as
the application demands.
It is available as a level only
device, or when connected to
external sensors – as a
multivariable instrument. The
Proservo can connect with up to
four external sensors via a
HART ® Multi drop field
protocol. Typical devices would
include an Averaging
Temperature Bulb, Tank Side
Display or Pressure
Transmitters.
Information processing
Its data handling capabilities enable
measurement and transmission of
continuous level, spot or average
temperature, pressure, interface level,
density and alarms. The integrated
electronics process these parameters
and then transmit the required
information via standard protocols to
the control room. Systems software can
then be use to provide your operator
with a complete environmental profile of
the tanks contents.
Time saving processes
If required, the gauge can be
configured in the field through the
ergonomically designed display and
control unit, standardized options to
ensure simple configuration and
operation. The control unit uses a light
sensitive touch control pad which
allows the operator to configure or
operate the gauge without removing
any covers.
Efficient on-site installation
Tank mounting intelligence makes the
Proservo NMS 53x series ideal for
single or multi-task installations. It’s
available with a number of flange
mounting options which allow simple
connection to existing nozzle fittings.
The unit can be mounted within a
stillwell or by means of a guidewire
assembly; both options provide
effective solutions for in-service
installations.
Complete solutions for application needs
High accuracy
Simple installation
Multivariable transmission
provides enhanced inventory
management in tanks up to
93 ft (28 m) in height, to an
accuracy of ±.03” (0.7 mm)
Standard tank top mounting
with a 3" (76 mm) flange
weighing only 26 lb (12kg)
(aluminum option) fits to new or
existing tanks and provides
compatibility with existing tank
farm wiring and systems
.........................................
Integral inspection
chamber
..................................................
Complete Connectivity
Allows visual inspection of
displacer and wire, minimizing Wide range of output signals
including RACKBUS, RS 485,
inspection and maintenance
V1, Serialbus, Mark/Space,
time
.............................................. WM550 and HART ® protocols
Field configuration
All electronics are isolated from without opening the
enclosure
tank atmosphere, maximizing
Increased Safety
safety and enabling operation in The built-in operator
hazardous areas
interface provides ease of
configuration and optimized
................................................... measurement availability
Designed for life
without the need for "Hot
Working Permits".
Robust IP 67 and NEMA 4X
All functions can be
approved housing, designed
accessed via a user friendly
and constructed for low
maintenance and high reliability three button interface
...................................................
Pag.13
Proservo – technical specification
Accuracy
±. 0.7 mm (03")
Interface accuracy
±. 2.7 mm (11")
Density accuracy
± 5 kg/m³ (0.3 lb/ft³)
Level measuring speed
2500 mm/min (98.4”/min)
maximum
Measuring range
0-28m (0 - 92 ft)
Measurement media temperature
-200°C to +200°C (-328°F to
+392°F)
Ambient operating temperature
-40°C to +60°C (40°F to +140°F)
Pressure rating
Low pressure
up to 0.2 bar g (3 Psi)
High pressure
up to 25 bar g (362.5 Psi)
Process connection
Standard tank
Connection 76 mm
(3”) ANSI DIN 80
(other options
available)
Cable entries
4 x M20/M25 [ 13
mm (1/2") 9mm
(3”) NPT]
Housing
Level alarms
Low pressure -aluminum
(stainless
Steel option) High
pressure – stainless
steel Weight 12 - 27 kg
(27 - 60 lb)
4 relays with
potential free
change over
contacts, freely
assignable to
measuredvalue
Power supply
Standard
protocols
85 - 264 Vac, 50/60Hz
as high voltage version
or 20 - 60 Vdc, 20-55Hz
as low voltage version
Power consumption
22 VA(max)
HART ®
/RACKBUS/V1
Protocols
available
Whessoe bus
Lightning protection 20mA current loop
Standard
Input for local
devices
Signal Multi drop HART
® protocol max. 4
devices
Typical HART ®
devices
Model NMT averaging
temperature bulb Model
NRF HART ® tank side
display HART ®
pressure transmitter
(WM550) EIA 485
bus Varec
mark/space (1900
protocol)
Safety
approvals
Cenelec EEx d IIB
T6 & PTB
FM & CSA
CE
UV overspil
protection
(pending)
TIIS
ATEX 100
Accuracy
approvals
PTB
NMI
Para mayor información favor dirigirse a nuestras oficinas a la siguiente dirección:
Av. Oquendo # N-0452 Edif. Santa María Piso 4
Telf: (591)(4) 4256993 – 4500905 Telf.: (591)(4) 4250981 – 4129114
Casilla 1935 – E-Mail: [email protected]
Pag.14

Cochabamba, Mayo de 2002. Nº 6 MEDICIÓN RADIOACTIVA

Transcription

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