Bộ thiết bị truyền phát tín hiệu điểm sương Dew-point Transmitter - Alphamoisture - Model AMT-Ex

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Bộ thiết bị truyền phát tín hiệu điểm sương Dew-point Transmitter - Alphamoisture - Model AMT-Ex 

Intrinsically Safe 4-20mA Dewpoint Transmitter

Model AMT-Ex is a three wire 4-20mA dew-point transmitter used for continuous measurement of moisture content in process gases and compressed air, which will output a linear 4-20mA signal in °C & °F corresponding to the dewpoint temperature. Factory configurations to output a 4-20mA linear signal for ppm(v), ppm(w), g/m3 and lb/MMSCF are also available.

The long lasting Aluminium Oxide sensing element offers excellent sensitivity, repeatability and response speed. Each unit is supplied with a Certificate of Calibration from our in-house calibration laboratory, traceable to International Humidity Standards, validating accuracy to ±2°C dewpoint.

- Model AMT-Ex is ATEX certified and provides an Intrinsically Safe Dewpoint Transmitter for hazardous area use when installed with the appropriate isolator. See AMT-Ex datasheet below.
- 3 Wire Intrinsically Safe (I.S.) Dewpoint Transmitter
- Certification - ATEX Marking: 
  ExII 1GD Ex ia IIC T4 Ex iaD 20 T135°C (-20°C ≤ Ta ≤ +60°C)
- Certification - IECEx Marking: 
  BAS 07.0080 ia IIC T4 Ex iaD 20 T135°C (-20°C ≤ Ta ≤ +60°C)
- Ranges available between: -120°C to +20°C (-184°F to +68°F) Dewpoint
- Accuracy ± 2°C Dewpoint
- AUTOMATIC CALIBRATION
- Can be configured for Linear 4-20mA signal Dewpoint, ppm(v), g/m3 and lb/MMSCF
- Temperature Compensation
- Failure Diagnostics
- Long Term Stability
- Fast Response
- IP66 / NEMA4X Protection

The AMT-Ex transmitter also incorporates an Automatic Calibration (AUTOCAL) feature as standard that allows the user to carry out field calibration and/or span checks quickly. The AUTOCAL feature is operated by means of two small button switches built within the transmitter enclosure as can be seen on the picture. To avoid tamper, the switches are locked in normal use and can only be activated by following the routine set out in the manual.

The integral RISC microprocessor circuitry of the Model AMT-Ex dew-point transmitter allows high resolution with advanced self-diagnostics for fault conditions. It also enables periodic re-calibration of the dew-point sensor, storing calibration data within the fully self-contained unit.

The mechanics of the Model AMT-Ex transmitter have been designed to cope with extreme environmental conditions. The rugged stainless steel construction offers protection to IP66 (NEMA4X), with transmitter electrical connections made via a secure industrial connector.

Model AMT-Ex transmitter can withstand upto 35,000 kPa (350bar) maximum pressure and by employing a low resistance cable, the transmitter can be located significant distances, in excess of 1000 metres, from the safe area.

Designed with the operator in mind for reliable and accurate measurements, Model AMT-Ex is extremely easy to install and operate, requiring little or no maintenance.

Supplied with a Certificate of Calibration, an illustrated instruction manual and 2m connecting cable as standard.

 

FEATURES

- 3 Wire Intrinsically Safe Dewpoint Transmitter
- Ex II 1GD Ex ia IIC T4 Ex iaD 20 T1350C (-20°C ≤ Ta ≤ +60°C)
- Overall Range: -120°C to +20°C Dewpoint
- Accuracy ± 2°C Dewpoint
- INTEGRATED AUTOMATIC CALIBRATION
- Can be configured for Linear 4-20mA signal in: °C & °F Dewpoint, ppm(v), g/m3, lb/MMSCF
- Fault Diagnostics
- Long Term Stability
- Fast Response time
- IP66 / NEMA4X Protection


Model AMT-Ex is ATEX certified and provides an Intrinsically Safe Dew Point Transmitter for hazardous area use when installed with the appropriate isolator.



See Illustration oposite and additional information on pages 2 and 4.

This online dew point transmitter also incorporates an Automatic Calibration (AUTOCAL) feature that allows the user to carry out a field calibration / span check. The AUTOCAL feature is operated by two small button switches built within the transmitter enclosure.

The integral RISC microprocessor circuitry of the Model AMT-Ex transmitter allows high resolution with advanced self diagnostics for fault conditions. It also enables periodic re-calibration of the moisture sensor, storing calibration data within the fully self contained unit. The mechanics of the Model AMT-Ex transmitter have been designed to cope with extreme environmental conditions. The rugged stainless steel construction offers protection to IP66 (NEMA4X), with the transmitter electrical connections made via a secure industrial connector.

Model AMT-Ex transmitter can withstand 35,000 kPa (350bar) maximum pressure and by employing a low resistance cable, the transmitter can be located at significant distances in excess of 1000 metres from the control room.

The Model AMT-Ex transmitter is supplied with a Certificate of Calibration, an instruction manual and 2m connecting cable.

Dew-point Sampling Systems available - see www.amsystems.co.uk for more details.

 

Specifications

MODEL AMT-Ex Dewpoint Transmitter

TRANSMITTER TYPE: 3 Wire, 4-20mA Loop Powered Transmitter
OUTPUT SIGNAL: 4 to 20mA Linear with selectable engineering units
OPERATING VOLTAGE: 12-28V dc. Reverse polarity protected.
SENSING ELEMENT: Ultra High Capacitance - Aluminium Oxide Type
RANGES: See How to Order Step 1 Below
INTRINSIC SAFETY CERTIFICATION STANDARDS:
EN 60079-0:2012 EN 60079-11:2012
Ex Certification: ATEX and IECEx Markings: IECEx BAS 07.0080
Ex II 1GD Ex ia IIC T4 Ex iaD 20 T1350C (-200C ≤ Ta ≤ +600C).
AUTOCAL: Field calibration / Span check facility. Activated and operated via two button switches on the Transmitter body.
Locked in normal operating mode to avoid tamper.
FACTORY CALIBRATION: Supplied with Certificate of Calibration traceable to NPL / NIST
ACCURACY: ± 2°C dewpoint (NPL/NIST traceable for range -90°C to +20°C)
REPEATABILITY: Better than ±0.3°C dewpoint
OPERATING TEMPERATURE: -20°C to +60°C
STORAGE TEMPERATURE: -20°C to +70°C
OPERATING PRESSURE: From 1kPa (0.01 barA) to Maximum 35,000kPa (350 barA)
OPERATING HUMIDITY (External): Maximum - 95% RH
Non-condensing
SAMPLE FLOW RATE: Flow independent but ideally 2 to 5 litres per minute. Max: 25 litres/min.
CABLE TERMINATIONS: IP66 (NEMA4X) rated, size C, DIN EN
175301 connector at the Transmitter and other end terminated with bootlace ferrules.
CABLE: Supplied with 2m IS (blue) standard cable. Nominal diameter 3.4mm, 92ohms/km at 20°C
ELECTROMAGNETIC COMPATIBILITY (EMC):
     Complies with BS EN 61326-1
WARM UP TIME: 10 seconds
FAULT CONDITIONS:
     Open Circuit: Output drives to 20.50mA
     Short Circuit: Output drives to 20.75mA
     ISOLATION: Sensing Element connected to the 4-20mA loop but isolated from Transmitter body.
TRANSMITTER ENCLOSURE: 316 Stainless steel body with size C, DIN EN 175301 connector.
SENSOR PROTECTION: 316 Stainless steel mesh - 50 micron
PROBE MATERIAL (WETTED PARTS): 316 Stainless Steel
WEATHERPROOF CLASSIFICATION: IP66 / NEMA4X when Connector mated to Transmitter.
MECHANICAL CONNECTION: 3/4” UNF (16tpi) with integral Viton “O” ring seal.
MECHANICAL WARRANTY: 24 months in case of faulty workmanship and defective parts.

 

5 bước hướng dẫn lựa chọn sản phẩm How to order

How to Order - Step 1 of 5: Select a Range Below

 

How to Order - Step 2 of 5: Select a Longer Cable Below

 

How to Order - Step 3 of 5: Order a Display Below (optional)

 

How to Order - Step 4 of 5: Select a Transmitter Holder

Comes compete with mounting plate.
2 grades available: 303 or 316 Stainless Steel

 

How to Order - Step 5 of 5: Order an Isolator for the safe area

- Part No. PR5104BB2A - Single Channel
- Part No. PR5104BB2B - Dual Channel


 

Dimensions

Model AMT-Ex Dewpoint Transmitter

 

Model ADSH-AMT Transmitter Holder

Flow Through Sample Cell


Note: The Assembly is shown with 1/4” OD tube fittings. The dimensions across the tube fittings will vary for all other size fittings.
 

Model DS1200 Display

Stable, Accurate and Reliable Alarmed Monitor


 

Application Wiring Diagrams

isolator

 

Model AMT-Ex Dewpoint Transmitter Using PR5104BB2B Dual Isolator and Model DS1200 Display

NOTE: The Model AMT-Ex is not suitable for Ammonia (NH3), Chlorine (CI) - and Hydrogen Chloride (HCI).
See Model EDM data sheets for products. Sulphur Dioxide (SO2) can be monitored if the moisture content is low, less than 100ppm(v). SF6 can be monitored with no effect to the sensor element.
 

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