Humidity and Dew-Point Instruments Easidew TX I.S. with NEC Sample Block FM, CSA, ATEX Instrinsically Safe Certified Dew-Point Transmitter Technical Specifications Performance Measurement range (dp) -100 to +20°C (-148 to +68°F) dew point Accuracy (dp) ±2°C (±3.6°F) dew point Response time 5 mins to T95 (dry to wet) Repeatability 0.5°C (0.9°F) dew point Electrical output/input An FM, CSA, ATEX intrinsically safe certified, 2-wire, rugged impedance dew-point transmitter for continuous measurement in hazardous area applications. Part number ESBx-NEC Sample Block is available as an option to the Easidew TX I.S. It comprises NEC Class 1, Division 1 & 2, Groups B, C, and D components for installation in hazardous areas. Highlights • • • • • • FM, CSA, ATEX intrinsically safe certified 2-wire loop powered connection Dew point or ppm moisture content IP66 (NEMA 4) Wide measurement range, calibrated -100 to +20ºC (-148 to +68ºF) dew point Operating temperature: -40 to +60ºC (-40 to +140ºF) Output signal 4-20 mA (2-wire connection, current source) User configurable over range Output Dew point, moisture content for ppmV and ppmW Output range Dew point: -100 to +20°C (-148 to +68°F) Moisture content in gas: 0-3000 ppmV Moisture content in liquid: 0-3000 ppmW Supply voltage 12–28 V DC Load resistance Max 250 Ω @ 12 V (500 Ω @ 24 V) Current consumption 20 mA max depending on output signal Saturation constants (For moisture in liquids measurements only) 6-point look-up table for saturation constants up to 3000 ppmW over the temperature range 0 to +50°C. Saturation constants for 8 common liquids can be programmed into the Easidew PRO I.S. via the application software. Alternatively the user can program saturation constants manually. Operating conditions Operating humidity 0–100% RH Operating temperature -40 to +60°C (-40 to +140°F) Operating pressure 45 MPa (450 barg / 6500 psig) max Flow rate 1 to 5 l/min (2.1 to 10.6 scfh) mounted in standard sampling block; 0 to 10 m/sec (0 to 32.8 fps) direct insertion Temperature coefficient Temperature compensated across operating temperature range Mechanical specification Simple Operation The Easidew TX I.S. is easy to install and operate. It requires a 12 to 28 V DC supply and provides a linear 4-20 mA signal representing moisture content. Moisture in Gases The output can be configured by the customer, using simple software, to any range within -100 to +20°C (-148 to +68°F) dew point, or 0-3,000 ppmV in gases. As the Easidew TX I.S. responds to water vapor pressure in the gas sample, it will give the user an accurate determination of the actual dew-point at pressure up to 45 MPa (450 barg / 6500 psig). Flow rate is not critical to measurement accuracy (1 to 5 Nl/min (2.1 to 10.5 scfh)), though speed of response will be improved by operating at a higher sample flow. Moisture in Liquids In addition to its moisture in gases capability the Easidew PRO I.S. can be used to monitor moisture in non-polar liquids. It is factory programmed to provide an output in ppmW. This requires the saturation constants of the liquid to be programmed into the transmitter either at the factory or by the user, using the application software, available as a free download from www.michell.com Hazardous Area Certificates ATEX - Ex II 1G EX ia IIC T4 FM - I.S. I 1 ABCD T4 (Ta = +60°C) CSA - IS Class 1 Div 1 Groups ABCD T4 IECEx - EX ia IIC T4 (-20°C ≤ Ta ≤ +60°C) Ingress protection IP66 in accordance with standard BS EN 60529:1992, and NEMA 4 in protection accordance with standard NEMA 250-2003 Housing material Stainless steel Dimensions L=132mm x ø27mm (L=5.19” x ø1.06”) (sensor only) Filter HDPE Guard <10μm 80μm sintered guard (optional) Sensor Mounting Thread 5/8” - 18 UNF Weight 8 lbs Interchangeability Fully interchangeable transmitter Diagnostic conditions (factory programmed) Condition Sensor fault Under-range dew point Over-range dew point Output 23 mA 4 mA 20 mA Approved galvanic isolators KFD2-CR-EX1.20200 KFD2-CR-EX1.30200 KFD0-CS-EX1.50P KFD0-CS-EX2.50P KFD2-STC4-EX1.H MTL5041, MTL5040 Issue No: Easidew TX IS NEC_V1_US_0511 www.michell.com/us Please note: Michell Instruments adopts a continuous development program which sometimes necessitates specification changes without notice. Please contact us for latest version. Humidity and Dew-Point Instruments Easidew TX I.S. with NEC Sample Block Dimensions EA2-HDPE Stainless steel sintered guard replacement SSG Easidew communications kit for EA2 EA2-CK Cable, 0.8m (2.62’) length is standard. For additional cable length replace the –xx with the length in feet EA2-CAB-XXF KFD0-CS-EX1.50P galvanic isolator (for Easidew PRO I.S. Pepperl & Fuchs) GI-PF-01 11" Pack of 10 replacement HDPE guards Accessories and Spare Parts BREATHER JUNCTION BOX CLASS 1, DIV. 1, GROUPS B, C & D REDUCING BUSHING 10" Electrical Connections DOWTY SEAL, 6500 psig MAX. 4-20 mA Pin 3 POWER INLET 1/8” NPT(F) SAMPLE BLOCK CUT-AWAY VIEW 4-20 mA connections 2-wire Pin 1 CONDUIT SEAL-OFF 3/4” NPT(F) EASIDEW IS & CABLE (SUPPLIED SEPARATELY) 4¾" OUTLET 1/8” NPT CUT-AWAY VIEW Ordering Codes To construct the order code, select the relevant feature from the tables below, starting with the base model, which is {Feature A} and then add on options to create a string: {Feature A} + {Feature B} + {Feature C} + {Feature D} Order example: EA2-IS+90/20+SS+ESBI-NEC Easidew Transmitter I.S., -90 to +20°C dp range, stainless steel sintered guard, ESBI-NEC Stainless steel sample block comprising Class 1, Division 1 & 2, Groups B, C & D malleable iron junction box with ¾” NPT female conduit seal-off and breather/drain. EA2-IS Base Model {Feature A} Easidew Transmitter I.S. EA2-IS Range {Feature B} -100 to +20°C (-148 to +68°F) dp range Non-standard measurement range: w - zero value, x = full scale value, y = unit (C = °Cdp, F=°Fdp, P=ppmV) z = Pressure for ppmV conversion in barg/psig, blank = 0 barg/0 psig) 100 wx/yz 90/20 SS ESBI-NEC Sample Block and Hazardous Area Enclosure {Feature D} Stainless steel sample block comprising Class 1, Division 1 & 2, Groups B, C & D aluminum junction box with ¾” NPT female conduit seal-off and breather/drain. ESBA-NEC Stainless steel sample block comprising Class 1, Division 1 & 2, Groups B, C & D malleable iron junction box with ¾” NPT female conduit seal-off and breather/drain. ESBI-NEC Protection {Feature C} Standard HDPE guard (with protection against fine particulate (<10μm)) HD SS sintered guard SS SS sintered guard with flanged mounting FL Michell Instruments, Inc 319 Newburyport Turnpike, Suite 207, Rowley, MA 01969 Tel: 978 484 0005, Fax: 978 843 7669, Email: [email protected], Web: www.michell.com/us © Michell Instruments 2011