Cảm biến đo điểm sương HDT - Cosa xentaur Việt Nam

Specifications of HDT

The HDT is a loop powered HART enabled dewpoint transmitter.

Housing .............................................Stainless Steel, weatherproof

Dimensions & Weight ...................~32mm (1.24”) Dia. x ~136mm (5.36”) long

including sensor & connector; 227 g (0.5 lbs.)

Pressure operating range ����Standard: 34 bar (500 psig). Optional: 340 bar

(5,000 psig)

Operating Temperature .............. -30°C to +85°C (-22°F to +185°F)

Mechanical connection ..............14mm x 1.25mm threads, and 3/4”-16 threads;

other threads upon request 5/8"-18 UNF, G1/2", 1/2"

NPT

Electrical connections ..................Industrial Standard 9.4 mm, 4 pin connector. IP65

(IP66 or IP67 optional)

Cable ...................................................Two conductor cable. Min. #24AWG; for total cable

length >1500m (5000’) min. #20AWG (Cable must be

shielded to meet CE requirements.)

Power Requirements: ................... 5 to 28 VDC, reverse polarity protected, the

instrument draws 4-20mA depending on measured

dewpoint

Input resolution ............................. 0.1°C(dp)

Indicators ..........................................None

Engineering units ������������������� Factory programmed °C(dp), °C(t),°F(dp), ppmV, LBS

H2O/mm scf, gm H2O/M3, ppmW, vapor pressure

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 engineering units, the range is

programmable. Output resolution is 0.1°Cdp 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 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 is connected to the current loop but isolated from the

transmitter housing and installation threads

Warranty:............... 1 year

Specifications of HTF™ Dewpoint Sensor Element XTR-60

Type ....................................................Hyper-Thin-Film (HTF™) high capacitance Al2O3

Dewpoint range .............................-60°C to +30°C (-76°F to +86°F), other ranges available

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

Accuracy ............................................±2°C (±3.6°F)

Repeatability ....................................±0.2°C (±0.36°F)

Temperature Range.......................-10°C to +70°C (+14°F to +158°F)

Sample flow range:

 (linear vel. @ 1atm) ................Static to 100 m/s

Storage temperature ....................-40°C to +80°C (-40°F to +176°F)

Calibration method .......................NIST/NPL traceable multipoint calibration table with

temperature compensation over the full range

Approvals/Classifications

CE for electromagnetic compatibility, accredited laboratory tested and certified.

Factory Mutual Approvals

IS Class I, II, III, Division 1, Groups A, B, C, D, E, F, G T6 at 40°C ambient;

 T4 at 85°C max ambient

Class I, Zone 0, AEx ia IIC T6 (-20 ≤ Ta ≤ 40°C); T4 (-20 ≤ Ta ≤ 85°C)

NI Class I, Division 2, Groups A, B, C & D; Suitable for Class II, Division 2,

 Groups E,F & G; and Class III, Division 2