Safety Instructions
IP4001/SI, Rev CA
October 2016
Mobrey™ VLS
ATEX Safety Instructions for Vibrating Rod Level Switches
Models covered:
VLS***35A/****
Mobrey VLS
Safety Instructions
Instructions specific to hazardous area installations
Model numbers covered: VLS***35A/***** ('*' indicates options in construction, function and materials.)
The following instructions apply to equipment covered by certificate number BKI 12ATEX0001:
1. The Mobrey VLS may be used in a hazardous area with flammable dusts. See Table 1 for maximum surface temperature.
2. Installation of the Mobrey VLS shall be carried out by suitably trained personnel, in accordance with the applicable code of
practice.
3. The Mobrey VLS is suitable for installation across the boundary between an area that specifically requires Equipment Protection
Level Da (Zone 20) and an area that specifically requires Equipment Protection Level Db (Zone 21). The probe (and extension) is
only to be installed in Zone 20 (EPL Da).
4. Inspection and maintenance of this equipment shall be carried out by suitably trained personnel, in accordance with the
applicable code of practice. Only approved spares supplied by the manufacturer or approved agent can be used.
5. If the Mobrey VLS is likely to come into contact with aggressive substances, it is the responsibility of the user to take suitable
precautions that prevent it from being adversely affected, thus ensuring that the type of protection is not compromised.
Aggressive substances: e.g. acidic liquids or gases that may attack metals or solvents that may affect polymeric materials.
Suitable precautions: e.g. regular checks as part of routine inspections or establishing from the material’s data sheet that it is
resistant to specific chemicals.
6. It is the responsibility of the user to ensure:
a.
b.
That any unused cable entries are sealed with suitably certified stopping plugs (Ex tb IIIC IP67, size M20x1.5).
That only suitably certified cable entry devices are used when connecting the Mobrey VLS (Ex tb IIIC IP67, size M20x1.5).
c.
That a suitable temperature-rated cable is used. The cable entry temperature may exceed 70 °C.
d.
That the joint requirements between the Mobrey VLS and the vessel/tank are compatible with the process media.
e.
That the joint tightness is correct for the joint material used.
f.
The seal between housing and cover is in good condition and correctly fitted.
g.
The voltage and current limits for the Mobrey VLS are not exceeded.
h.
The protective earth terminal is connected to an external protective earthing system.
7. Technical data
a.
Materials of construction:
Probe: stainless steel 316 (1.4571) type
Housing and cover: aluminum alloy
Note: The metallic alloy used for the enclosure material may be at the accessible surface of the Mobrey VLS; in the event of
rare accidents, ignition sources due to impact and friction sparks could occur.
b.
Coding: II 1/2 D, Ex ta/tb IIIC T90°C…T170°C Da/Db
c.
Temperature
Table 1: Thermal Data
VLS**435A
VLSK*(1/3)35A
VLSH**35A
Process temperature (Tp)
(EPL Da – category 1D)
+60 °C
+70 °C
+80 °C
+95 °C (1)
+60 °C
+70 °C
+95°C
+110 °C
+160 °C
Ambient air temperature (Ta)
(EPL Db – category 2D)
+60 °C
+50 °C
+60 °C
+60 °C
+50 °C
+60 °C
+50 °C
+35 °C
Maximum surface temperature
(process connection)
+85 °C
+85 °C
+95 °C
+85 °C
+85 °C
+95 °C
+95 °C
+135 °C
Maximum surface temperature (T)
+85 °C
+85 °C
+95 °C
+85 °C
+85 °C
+95 °C
+110 °C
+160 °C
T100°C
T115°C
T170°C
T Class
T90°C
T100°C
T90°C
1. The process temperature can reach +95 °C for a maximum period of one hour.
1
Safety Instructions
Mobrey VLS
Minimum ambient air temperature (Ta) = –30 °C
Minimum process temperature (Tp) = –30°C
d.
Pressure: must not exceed the rating of the coupling/flange fitted.
e.
Ingress Protection: IP67
8. Special conditions of use
2
a.
b.
The enclosure must not be opened when the equipment is electrically energized.
The Mobrey VLS can only be used in a dust/air mixture with a minimum ignition temperature at least 1.5 times higher than
the temperature class (T Class) for the specific model and operating conditions shown in Table 1.
c.
In hazardous atmospheres the unit can only be energized after fitting the housing cover and tightening down the cover
securing clamp.
Mobrey VLS
Safety Instructions
Figure 1. Declaration of Conformity Certificate (Page 1)
!!!!!
H
! #! # #
#!#"!#
!####
#
#
0=HC6=H9C=H>9/H=>:96>)*/)@FH?2,@H@'H:=9C@H
!! !!!!!!
36C#?C=HFH
! #! # #
#!#"!#
!####
#
#
?9HE'*'H?(*>H0=?)96H=0?>H)>H*6H96%4)?FHE*?'H?'H=9D*>*97>H9 H?'HC=9:6H
933C7-?FH*=?*D>H*60C*6&H?'H1?>@H3636?>H>H>'9E6H)7H?'H?B'H>'C0H
>>C3:?*96H9 H96"
5*?FH)>H>H96H@'H::0*@*96H9 H?'H'=398-GH>?6=>H6HE'6H
::/)0H9=H=<C*=HHC=9:6H933C6)@FH69@)$H9FHA.)!+?*96H>H>'9E6H*6H?'H
@?'H>'C/H
090H;:=9D0>H6&=H
D)HH9>>3*0?96H
H
3
Safety Instructions
Mobrey VLS
Figure 2. Declaration of Conformity Certificate (Page 2)
""
-.10+;('<!6%0'%4'5<<<
""
-.10+;('<6%0'%4'5<<<
"
"
! "!"
37+2/(06<4182<<%6()14:<<<
9<6%6&<<" <
<#, <%&<
%4/10+;('<!6%0'%4'5< <<<,<<<
<<<
6*(4<!6%0'%4'5<$5('< <<
$!$$$$ $$$$ $ $$$#$ $
$"$
$$!$
4
Mobrey VLS
Safety Instructions
Figure 3. Declaration of Conformity Certificate (Page 3)
!
#<"#"#
"###
15'%)$#<1#;<7."$3<
<
',19'0;<<8<
<
<<8#!2$45<<
## #15'%*$#<1#;<8/"$3< <
0'5<<!:!3#$0<0#8453'!-<!3,<
+:!3#$0<<<0(6$#<'0&#1.<
5
Safety Instructions
IP4001/SI, Rev CA
October 2016
Linkedin.com/company/Emerson-Process-Management
Head Office
Rosemount Measurement Limited
158 Edinburgh Avenue
Slough, Berks., SL1 4UE, UK
+44 (0)1753 756600
+44 (0)1753 823589
[email protected]
North America Office
Emerson Process Management
6021 Innovation Blvd.
Shakopee, MN 55379, USA
+1 800 999 9307 or +1 952 906 8888
+1 952 949 7001
[email protected]
Twitter.com/Rosemount_News
Facebook.com/Rosemount
Youtube.com/user/RosemountMeasurement
Google.com/+RosemountMeasurement
Standard Terms and Conditions of Sale can be found at:
www.Emerson.com/en-us/pages/Terms-of-Use
The Emerson logo is a trademark and service mark of Emerson Electric Co.
Mobrey is a registered trademark of Rosemount Measurement Ltd.
All other marks are the property of their respective owners.
© 2016 Rosemount Measurement Ltd. All rights reserved.