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1 INTRODUCTION
Warning. This operating manual applies only to
those systems which have been designed and constructed
to the standards specified in the schedules of the ATEX
certificates listed. The separate units to which these
certificates apply are clearly identifiable by model numbers
and the data on the identification and ATEX certification
labels fixed to them. Other combinations of similar
equipment built to any earlier specifications are not covered
by BASEFA certificate number BAS Ex 01E2044. This is
particularly important where new replacement units are to
be incorporated into existing installations covered by any
earlier certification standards. If in any doubt about the
installation
of
particular
equipment, please contact the Company for advice before
proceeding.
It is essential that units are installed strictly in accordance
with the appropriate standards for electrical equipment for
use in flammable atmospheres. Any deviation from the
specified installation conditions, or any unauthorized repairs
or adjustments can invalidate the safety assurances given
by the certification of the unit.
The ultimate responsibility for any particular installation lies with
the installing user/contractor.
This manual gives the installation, operating and maintenance
information for the Company's range of Model 6553 Intrinsically
Safe Gas Analyser Systems, normally used with hydrogen
cooled electrical power generators.
The complete 6553 analyser system uses a combination of three
different units. Each unit is independently certified for use as part
of an intrinsically safe system to meet the standards of the ATEX
directive 9/94/EC for use in association with Group IIC
(hydrogen) hazardous atmospheres in accordance with the
following standards:
E
N
5
0
0
1
4
:
1
9
9
7
+
A
m
e
n
d
E
N
5
0
0
2
0
:
1
9
9
4
E
N
5
0
2
8
4
:
1
9
9
9
E
N
5
0
0
3
9
:
1
9
8
0
2
combinations
of
certified
0
0
6
5
3
9
&
0
m
e
n
s t
1
&
2
4
2
3
4
5
0
0
5 /
6
5
5
3
G
s a
M
0
0
6
5
3
9
&
0
S
s y
e t
m
The different units of the system are:
1) The Model 6553 Gas Monitor Unit which is available in
several options. The inputs to these units are certified to
code [EEx ia] IIC Tamb=–20°C to +40°C under BAS 01 ATEX
7043 certificate with the unit installed in the safe area only.
2) The
Model
Katharometer Units which forms part of an intrinsically safe
Model
006540-203
Analyser Panel. The 006539-960 and 006548-001 units are
certified to code EEx ia IIC T4 Tamb=–20°C to +55°C under
BAS 01 ATEX 1042 certificate for installation in the
hazardous area (ZONE 0).
3) The Model 4234 500/501 constant current Power Supply
Unit, which provides a suitable supply for one katharometer
unit. These units have their output certified to code [EEx ia]
IIC Tamb=–20°C to +55°C under BAS 01 ATEX 7041
certificate for installation in the safe area only.
If further information or assistance is required, Company
specialist staff, service centres or worldwide organization may
be contacted through the most convenient address given on the
back cover of this manual. Specialist training courses can also
be arranged by our Training Centre.
0
6
5
4
8
K
a
h t
a
o r
m
t e
r e
U
n
s t i
0
1
P
o
w
r e
S
u
p
p
y l
U
t i n
o
t i n
r o
U
t i n
0
6
5
4
8
K
a
h t
a
o r
m
t e
r e
U
n
s t i
006539-960K
(or
J)
and
and
006548-000
006548-001
Katharometer
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