Easidew PRO I.S. User’s Manual
Michell Instruments 17
APPENDIX B
Appendix B System Drawings
B.1 Baseefa Approved System Drawing
10/03/06
MSB
Ex90352
SHEET 1 OF 1
NTS
SCALE
SIGN
A3
DATE
MOD. No.ISSUE
DRAWING NUMBER
TOLERANCES:
UNLESS OTHERWISE STATED
FINISH
DIMENSIONS:
MATERIAL
TITLE
USED ON
APPROVEDCHECKED
DATEDATE
DRAWN
DATE
MICHELL INSTRUMENTS LTD. 01/11/05 DOF03
mm
DRAWING
UNITS
THIS DOCUMENT IS THE PROPERTY OF MICHELL INSTRUMENTS LTD.
AND MUST NOT BE COPIED NOR DISCLOSED TO A THIRD PARTY
WITHOUT THE CONSENT OF MICHELL INSTRUMENTS.
EASIDEW I.S. and EASIDEW PRO I.S.
DEWPOINT TRANSMITTER SYSTEM
DRAWING
3rd ANGLE
PROJECTION
MICHELL INSTRUMENTS LTD. CAMBRIDGE ©
ANGLES: ±0.5°
HOLE Ø:
+0.1
-0.0
0 DEC. PLACE: ± 0.
5
1 DEC. PLACE: ± 0.2
2 DEC. PLACE: ± 0.1
01 CERT ISS 26/01/07 MSB
02 08057 27/05/08 IMA
4 Inches
100mm
03
PRO
Variation
16/02/09
IMA
04
11165
10/08/11
IMA
05
13395
16/12/13
IMA
INTERFACE BARRIER
REFER TO TABLE ABOVE.
HAZARDOUS AREA
SAFE AREA
(RETURN)
(+)
+VS (20 TO 35V DC)
VS -
LOAD
4/20mA
+
-
GALVANIC ISOLATION INTERFACE
(+)
(-)
DEWPOINT
TRANSMITTER
CERTIFICATION No's:
Baseefa06ATEX0330X
IECEX BAS 06.0090X
3
1
TRANSMITTER VERSION
TERMINAL NUMBER
EASIDEW
I.S.
EASIDEW
PRO I.S.
2
4
EASIDEW I.S. DEWPOINT TRANSMITTER
SYSTEM CERTIFICATE No's: Baseefa07Y0027
Ex ia IIC T4 (-20C TO + 70C)
SYSTEM LABEL
THE CAPACITANCE AND EITHER THE INDUCTANCE OR THE INDUCTANCE TO RESISTANCE RATIO
(L/R) OF THE CABLE MUST NOT EXCEED THE FOLLOWING VALUES:
IIC
IIB
IIA
4.2mH
12.6mH
33mH
THE ISOLATION OF THE SIGNAL WIRES WITH THE EASIDEW DISCONNECTED, MUST BE ABLE TO
WITHSTAND A 500V AC INSULATION TEST.
AT INSTALLATION OF SYSTEM PERFORM A RISK ASSESSMENT IN ACCORDANCE WITH
EN60079-25:2004 cl.10 AND INSTALL LIGHTENING PROTECTION AS NECESSARY.
THE SYSTEM MUST BE MARKED WITH A DURABLE LABEL. THE LABEL SHOULD APPEAR ON OR
ADJACENT TO THE PRINCIPAL ITEM OF ELECTRICAL APPARATUS IN THE SYSTEM OR AT THE
INTERFACE BETWEEN THE INTRINSICALLY SAFE AND NON-INTRINSICALLY SAFE CIRCUITS. THIS
MARKING SHALL INCLUDE THE FOLLOWING INFORMATION:
Baseefa 07Y0027 AND THE WORD SYST OR SYSTEM.
40 nF
613 nF
2.11 μF
54 μH/
217 μH/
435 μH/
GROUP CAPACITANCE INDUCTANCE OR L/R RATIO
(μF) (mH) (μH/ohm)
SEE NOTE 1
*
NOTE 1
. 46nF MAXIMUM CABLE CAPACITANCE IS ACCEPTABLE IN
IIC
INSTALLATIONS
FOR THE INTRINSIC SAFETY ISOLATORS SHOWN IN THE LIST BELOW.
FOR ISOLATORS N
OT LISTED BELOW, BUT APPEARING IN TABLE A, ONLY 40nf
MAXIMUM CABLE CAPACITANCE IS ACCEPTABLE.
KFD0-CS-Ex1.50P
KFD0-CS-Ex2.50P
KFD0-CR-Ex1.20200
KFD0-CR-Ex1.30200
MTL5041
MTL5040
M
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