Teledyne HDT Loop-powered Hybrid Dewpoint Transmitter-仪表网

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Teledyne HDT Loop-powered Hybrid Dewpoint Transmitter

Teledyne HDT Loop-powered Hybrid Dewpoint Transmitter 产品详情

Model HDT
Loop-powered
Hybrid Dewpoint Transmitter

-100°C(dp) to +20°C(dp)

• HTF™ Aluminum Oxide Sensor Technology
• Loop-powered (2-wire)
• Analog (4-20 mA) Output
• Digital (HART Compliant) Output
• Programmable Alarm Signal
• NEMA 4X IP66 Stainless Steel Enclosure
• Compact Design
• Temperature Compensated Calibration
• Certifications applied for: CE, IS(UL,Demko)

HTF™ High Capacitance Aluminum Oxide Sensor
The HDT uses a Xentaur HTF™ high capacitance aluminum oxide sensor with a measuring range of -100°C(dp) to +20°C(dp). HTF™ sensors provide a degree of accuracy, speed of response and stability unavailable from instruments using conventional sensors.
Hart-compliant, IP66/NEMA4X Transmitter
The model HDT is a HART compliant IP66/NEMA4X hybrid dewpoint transmitter, providing loop powered analog as well as a digital output. Housed in a 1.25”dia. stainless steel case it has an overall length of 5.68”, including the standard industrial 9.4mm 4 pin connector. This makes the HDT the world's smallest dewpoint transmitter.
Analog Output Loop
The instrument draws 4-20mA from the power supply. The 4-20mA is linear to °C(dp) with an output resolution of 0.1°C(dp) or 0.25uA, whichever is greater. The output range is programmable.
Digital Output Loop
The instrument can supply a digital output by modulating the 4-20mA loop line. The interface is defined by HART. In the digital mode the HDT can be remotely operated and the dewpoint as well as temperature (ａnd pressure if installed) can be read. In the digital mode multiple units can operate on the same loop cable as a multi-channel instrument. In this configuration each HDT draws only 4mA independent of the measured dewpoint
Built-in Alarm
The HDT provides a factory programmable dewpoint alarm signal through a digital output pin. Additionally, relays or external devices can be operated through the analog or digital loops.
Connections
The HDT has two different thread types, which makes the upgrade of existing installations easy. The HDT connects through inexpensive two-conductor cables over long distances.
Measurement Accuracy/Stability
The HDT transmitter uses a multipoint calibration table which provides temperature compensated dewpoint readings for temperatures from -10°C(t) to +70°C(t). Thus, the HDT provides accurate dewpoint measurements over its full range even under extreme temperature conditions, such as when installed outdoors or close to heat sources.

Specifications of HDT Transmitter
The HDT is a loop powered HART enabled dewpoint transmitter.
Enclosure: . . . . . . . . . . . . . . . . .Stainless Steel, IP66 NEMA 4X.
Dimensions & Weight:. . . . . . . . ~1.25”Dia. x ~5.68” long including sensor & connector; 0.5lbs.
Pressure operating range: . . . .Standard: 500 PSI (34 bar).
Optional: 5,000 PSI (340 bar).
Operating Temperature: . . . . . .-10°C to +70°C.
Mechanical connection: . . . . . .14mm x 1.25mm threads, and 3/4”-16 threads.
Electrical connections: . . . . . . .Industrial Standard 9.4 mm, 4 pin connector. IP66 NEMA 4X
Cable: . . . . . . . . . . . . . . . . . . . .Two conductor cable. Min. #24AWG; for total cable length >5000ft.: min. #20AWG (Cable must be shielded to meet CE requirements.)
Power Requirements: . . . . . . . .5 to 28 VDC, the instrument draws 4-20mA depending on measured dewpoint.
Input resolution: . . . . . . . . . . . .0.1°C dewpoint.
Indicators: . . . . . . . . . . . . . . . . .None.
Engineering units: . . . . . . . . . . .°C(dp), °C(t).
Controls: . . . . . . . . . . . . . . . . . .HART interface, user’s selections are stored in EEPROM.
Outputs: . . . . . . . . . . . . . . . . . .Analog and digital outputs are available.
A. 4-20mA drawn by the instrument from the power supply. The 4-20mA is linear to °C(dp), the range is programmable. Output resolution is 0.1°C(dp) or ~ 0.25uA whichever is greater.
B. The instrument can supply digital output by modulating the 4-20mA loop line. The interface is defined by HART. In the digital mode the HDT can be remotely operated and the dewpoint as well as temperature (ａnd pressure if installed) can be read. In the digital mode multiple units can operate on the same loop cable as a multi-channel instrument. In this configuration each HDT draws only 4mA independent of the measured dewpoint
Alarms:. . . . . . . . . . . . . . . . . . . .The 4-20mA signal may be used by an external device to operate relays. In addition, a digital output pin is provided which can be factory (or specially equipped customer) programmed to provide dewpoint alarm indications.
Isolation: . . . . . . . . . . . . . . . . . .Sensor and case are grounded to the current loop negative side.
Warranty: . . . . . . . . . . . . . . . . . .1 year

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