Easidew TX I.S. with NEC Sample Block Technical Specifi cations

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
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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: us.info@michell.com, Web: www.michell.com/us
© Michell Instruments 2011