COSA Xentaur XDT Data sheet

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Page 1

Dewpoint Transmitter

Series XDT

-148°F to + 68°F Dewpoint

COSA dewpoint transmitters are used wherever the dewpoint in a gas is critical

APPLICATIONS INCLUDE:

• Monitoring and control of air dryers

• Plastic dryers

• Welding and laser gases

• Petrochemical feedstock gases

• Natural gas

• Clean rooms

• Transformer and switch gear insulation gases

• Glove boxes

• Cryogenic gases

• Heat treating furnaces

• Industrial specialty gases

• Many more

Class I Division 1 Groups A,B,C, & D; Class II Groups E, F, & G

Manufactured with pride in the USA

Features Xentaur HTF™ Al2O3 Technology

visit www.cosa-instrument.com for

Process Analyzers: Moisture in Gases (Portable, Loop-powered, HART Protocol, Relative Humidity)

Moisture in Liquids: H2 Analyzers, O2 Analyzers, Gas Chromatographs, Calorimeters and Other Speciality Instrumentation

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GENERAL

The COSA digital dewpoint transmitters are designed as compact, simple and reliable instruments, which will continually monitor air dryer performance, compressed air quality and dry gas moisture, from ambient dewpoint levels to as low as -148°F (-100°C).

APPLICATIONS

COSA dewpoint transmitters are used wherever the dewpoint in a gas is critical. Applications include: monitoring and control of air dryers, plastic dryers, welding and laser gases, petrochemical feedstock gases, natural gas, clean rooms, glove boxes, transformer and switch gear insulation gases, cryogenic gases, heat treating furnaces, industrial specialty gases and many more.

ELECTRONICS

The transmitter electronics take full advantage of state of the art microprocessor technology and offer many advanced intelligent features. With optional dual alarms, analog and digital outputs, the COSA dewpoint transmitters can be used as indicators, alarm units or controllers.

PROGRAMMABLE ALARM RELAYS OPTION

The two optional alarm relays can be independently programmed to switch at any dewpoint with variable hysteresis, which makes the transmitter ideally suited as an energy saving controller for desiccant dryers in “dewpoint demand” mode or safety cutoff in process control, high power laser, etc. The status of the relays is shown on the display with flashing HI or LO indicators while displaying the dewpoint.

ANALOG AND DIGITAL OUTPUTS OPTIONS

Analog and digital outputs are isolated from the sensor. The analog current or voltage output can be programmed to span the full or a portion of the range and is linear to the selected engineering units. The RS-232 interfaces into the serial port of any PC or Mac, for a simple operation with any standard communications program.

USER-FRIENDLY INTERFACE

The instrument is operated through a menu driven user interface consisting of a custom LCD display with backlight, and four push buttons.

ENGINEERING UNITS

The user can select from the following engineering units. Dewpoint in °C or °F, ppmv, g H2O/m3, lbs H2O/ million scf.

PRESSURE CORRECT FUNCTION

Results are displayed at sensor pressure or by pushing the Pressure Correct key at a user selectable alternate pressure, such as the line pressure.

SPANCHECK IN THE FIELD

This field calibration procedure is fully automated and the user is prompted through a simple one minute procedure, which requires no additional equipment.

ERROR INDICATION

The instrument has indication for sensor open, short or electronic system failure, which can activate any of the alarm relays.

NIST / NPL TRACEABILITY OPTION

Certificates for NIST and NPL traceability are available upon request. Instruments can be recertified periodically at COSA’s laboratories.

SAME TRANSMITTER - MULTIPLE CONFIGURATIONS

Model XDT-OEM is a stand alone board suitable for mounting in existing enclosures. Connections are made through a pluggable screw terminal block which allows cables to leave the board vertically or horizontally.

The electronic board can be broken into two parts and sandwiched to accommodate space constraints.

Also Available: XDT in explosion proof enclosure, UL approved for use in Hazardous Locations Class I Division 1 Groups B, C & D; Class II Groups E, F & G. Provides Instrinsically Safe output for use in Hazardous Locations Class I Division 1 Groups A, B, C & D; Class II Groups E, F & G

Model XDT-PM houses the transmitter in a panel mount industry standard DIN 43700 box, 3” (7.5cm) deep. Connections are made through a pluggable screw terminal block.

The panel mount model is available with the push buttons on the outside of the front panel (shown above) or with the push buttons hidden behind the front panel.

Model XDT-NEMA houses the transmitter in a NEMA 4 (IP65) enclosure. Ideally suited for industrial environments.

Can be ordered UL approved for use in Hazardous Locations Class I Division 2 Groups A, B, C & D; Class II Groups F & G. And optionally Providing Intrinsically Safe output for use in Hazardous Locations Class I Division 1 Groups A, B, C, & D; Class II Groups E, F & G.

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The Xentaur HTF™ Aluminum Oxide sensor is the

HTF Technology™

Conventional

200

100

150

Hyper-Thin-Film vs. Conventional

Al2O3 Sensor

Change of Capacitance with Dewpoint

-90

-10

-30

-70

-50

Dewpoint (°C)

200

100

150

product of years of intensive research and has been thoroughly field proven. Xentaur HTF™ technology offers significant performance advantages over all other aluminum oxide moisture sensors.

HIGH CAPACITANCE RESPONSE

Due to a hyper-thin film and a special activation process, Xentaur sensors have a capacitance change over their full range, several orders of magnitude larger than that of conventional aluminum oxide sensors. Additionally,

this change is quasi linear and its sensitivity to temperature is negligible. The advantages of a linear high capacitance response are: better sensitivity, better

repeatability and faster response times. Also, the measurement system is less prone to noise and drift, and signal conditioning is kept to a minimum.

INTERCHANGEABLE SENSORS

HTF™ Al2O3 high capacitance sensors are manufactured with high uniformity. Consequently, sensors are freely interchangeable without factory calibration or changing of EPROMS, as is required with conventional aluminum oxide sensors.

SPANCHECK WITHOUT REFERENCE STANDARDS

Xentaur HTF™ high capacitance sensors have a very low residual capacitance when dry, and saturate at a predesigned level of humidity above +68°F (+20°C). This allows a span check of the sensor by cupping the sensor in the palm of one’s hand for one minute, and adjusting the instrument to its upper range limit. The advantages of this span check system are obvious: Xentaur sensors can be field calibrated anywhere, anytime without using expensive and cumbersome calibration standards. Sensors do not have to be returned to the factory for recalibration, which also eliminates the need for a second stand-by sensor.

WATERPROOF SENSORS

Xentaur HTF™ sensors are available in waterproof versions. Waterproof sensors can be fully immersed in water and will go back into operation after drying down.

ADVANCED MECHANICAL SENSOR DESIGN

Xentaur HTF™ sensors have been designed for the requirements of tough industrial environments. The sensor element is encapsulated in a 100 micron stainless steel sintered filter. The filter housing is screwed onto a stainless steel sensor fitting which is available for pressures of up to 5000 PSI (FM tested).

When sensor elements have to be replaced the sensor fitting can be saved. The sensor fitting has two mounting threads, which make it easy to use existing sample cells. The cable is connected through a BNC connector.

TECHNICAL SPECIFICATIONS

OF XENTAUR HTF™ SENSORS

SENSOR ELEMENT:

Type: . . . . . . . . . . . . . . . . . . . Hyper Thin Film high capacitance AL2O

Dewpoint range:

XTR-100 . . . . . . . . -148°F to +68°F (-100°C to +20°C)

XTR-65 . . . . . . . . . -85°F to +68°F (-65°C to +20°C)

Capacitance: . . . . . . . . . . . . 15 nF to 200 nF

Accuracy: . . . . . . . . . . . . . . . ±5.5°F (± 3°C )

Repeatability: . . . . . . . . . . . . ±0.9°F (±0.5°C)

Response time*: . . . . . . . . . . For a step change from -40°C to -60°C:

63% in 90 seconds 90% in 450 seconds

Temperature range: . . . . . . . -22°F to 104°F (-30°C to +50°C)

Sample Flow range (linear velocity at 1 atm):. . . Static to 100 m/s

Storage temperature: . . . . . . -40°F to +120°F (-40°C to 50°C)

SpanCheck: . . . . . . . . . . . . . Sensor saturates at dewpoint

above +68°F (+20°C)

FITTING:

Pressure operating range: . . Standard: 500 PSI (34 bar) Optional: 5000 PSI (340 bar)

Mechanical connections: . . . . 14mm x 1.25 mm threads, and

3/4”-16 threads (other threads available)

Electrical connections: . . . . . Female BNC connector

Sensor cable: . . . . . . . . . . . . Coaxial cable (75⍀ with maximum

capacitance of 50 pF/m). Maximum cable length: 3,000 ft.

* These response times are not directly comparable to com-

petitors data because of differences in measurement methodology and data presentation. Please inquire for detailed comparisons between Xentaur and other major sensor manufacturers. Our sensors are significantly faster.

For more details:

http://www.xentaur.com

HTF™ Al2O3 ADVANTAGES:

• Up to 600x more sensitive than conventional sensors

• Sensors are freely interchangeable

• Field calibration without reference standards

• Faster response

• Better repeatability

• Longer sensor life

• Less drift

• Negligible temperature coefficient

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XDT SERIES

TECHNICAL SPECIFICATIONS

Transmitter:

Sensor type:. . . . . . . . High capacitance Al2O

Input Resolution: . . . . 0.1°C dewpoint

Indicators: . . . . . . . . . LCD with backlight, 3.5 digits and custom legends for

units and mode, audio alert

Engineering units: . . . Dewpoint in °F and °C,

Controls: . . . . . . . . . . 4 push buttons, all settings stored in EEPROM

ppmv, g H

O/m3, lbs H2O/mm scf,

Output options: . . . . . 4-20mA, 0-24mA or voltage outputs, linear to selected

engineering units, programmable span and range,

0.1°C dewpoint resolution. RS-232 , baud rate 9600, resolution 0.1°C dewpoint

Isolation: . . . . . . . . . . Sensor is isolated from the power supply, analog

output and RS-232.

Alarm relays option: . . Two programmable alarm relays with programmable

variable hysteresis, rated at 10A @240V. Failure indication programmable to trigger alarm relays.

Power requirements: . 100 - 240 VAC, 50 or 60 Hz, autoranging or by order

12VDC or 15-30VDC 0.5A

Connections: . . . . . . . Pluggable screw terminal block

Enclosure: . . . . . . . . . Polycarbonate, Nema 4/4x Dimensions 4.7” x 6.3” x

3.5” (w x h x d); DIN 43700 - 3” deep. Temperature range

of electronics: . . . . . . 14° to 122°F (-10° to 50°C)

Optional Features: . . . a) Medical Breathing Air Monitoring and Alarm Option,

complies with the recommendations of NFPA 99, 1996 edition b) On-board battery backed real-time clock option, facilitating Scheduled Timer Activated Single Point Self Calibration/Verification procedure for sample systems equipped with an electrically actuated switchover valve.

Warranty: . . . . . . . . . . 1 year for full workmanship and defective parts.

Dimensions XDT-OEM

Optional Key Pad Connector

DEWPOINT TRANSMITTER

M O D

4.370"

P R

S R

CAUTION

RELAY

VOLTAGE

HI RELAY

2001

2000

score line, break to fit in PM box

LOW RELAY

NCNOCNCNO

0.700"

0.350"

Dimensions XDT-NEMA

3%.3/2/54054 &/2:%.%2"!22)%2 %15)00%$5.)43

.04(5" ()'(6/,4!'%!00,)#!4)/.

#!",%'2)0 ,/76/,4!'%!00,)#!4)/.

4.250"

2.140"

MADE IN USA

2003

2002

GND

PS+

3.900"

ISPLAY

TXD

RET

RXD

0.740"

J.F.M.A.M.J.J.A.S.O.N.D

100-250VAC

50/60HZ

GND

A.OUT

A.RET

SIGNAL-RET

SIGNAL-IN

Mounting Holes d=0.150" (6 places)

-/5.4).'(/,%0!44%2.

Audi

Indic

10VA

0.335"

0.195"

tor

AC Power FUSE on side-mounted RFI daughter board.

ACH

ACN

Pluggable Screw Terminal Connector outline.



2.315"

4.630"

SIDE VIEWTOP VIEW

0.44"

4.935"

5.145"

0.51"



-/5.4).'(/,% 0!44%2 .

RFI daughter boa

1.38"

Class I, Division 1 Groups A, B, C, & D; Class II Groups E, F, & G; Class I Division 2 Groups A, B, C, & D; Class II Groups F & G; EEx d[ia] IIB+H2

Dimensions of Element and Fitting (other threads are available)

Removable Sensor encapsulated in 100m sintered stainless steel, unscrew to remove.

Viton A O-ring

3/4"-16

14mm x 1.25mm

tension washer

5/16"-24

cable with molded-on male BNC connector

female BNC connector

flats for 1 " wrench

2.230"

3" min

Sample cells and complete sampling systems available. For more information, refer to website

COSA INSTRUMENT CORPORATION

Texas Office: 7125 North Loop East, Houston, TX 77028

REPRESENTED BY:

Tel: 713-947-9591, Fax: 713-947-7549

New Jersey Office: 55 Oak Street, Norwood, NJ 07648 Tel: 201-767-6600, Fax: 201-767-6804

email: [email protected] www.cosa-

instrument.com

Dimensions XDT-PM

#/..%#4/20/3)4)/.

"!#+6)%7

&2/.46)%7

4/06)%7

0!.%,4()#+.%33%3 504/).#%3'! /2---!9"% !##/--/$!4%$

3)$%6)%7

-/5.4).'0!.%,

8$4- -/5.4).'#,)02%1g$

rev 3.305