Servomex SERVOTOUGH Oxy, Руководство оператора

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01910001B_8 © Servomex Group Limited. 2020
31
1.
Refer t
o
Figure
1.
Use the 2 mm hexagonal key supplied to loosen the locking screw
which secures the cover.
2.
Unscrew the cover; that is, turn it an�clockwise. If necessary, fit a suitable metal bar
between the protruding fins on the front of the cover to provide addi�onal leverage.
3. When
the cover is fully disengaged from the body of the analyser, remove it and place it
carefully on a clean surface: see the cau�on above.
5.3
Electrical supply and interface signal connections
5.3.1
Electrical safety
Ensure that the electrical installa�on of the analyser conforms with all applicable
local and na�onal hazardous area and electrical safety requirements.
Obey the safety instruc�ons given below when you install the analyser; if you do not,
the
analyser cer�fica�on may be invalidated, the analyser may not operate correctly,
or it may be damaged.
• All cables connected to the power/signal compartment must be connected to
equipment which is not supplied from, or contain in normal or abnormal opera�ng
condi�ons, a source of poten�al with respect to earth (ground) higher than 253 Vac or
253 Vdc. As such it is recommended that the analyser is connected to a "grounded
neutral" supply.
•
The
analyser does not incorporate an integral on/off switch. You must provide a means
of externally isola�ng the electrical supply from the analyser: use a suitable switch or
circuit breaker located close to the analyser, clearly marked as the disconnec�ng device
for the analyser. This switch/circuit breaker must be easily operated with no
obstruc�ons.
• The electrical supply circuit must incorporate a suitable fuse or over
-
current protec�on
device, set to or rated at no more
than 10 A.
•
The
analyser must be connected to an external protec�ve earthing system, using the
Protec�ve Earth on terminal P101.
•
The
analys
er
s Earth (ground) connec�on located on the base of the analyser
must be
equipoten�ally bonded locally to the analyser
.
• Ensure that your electrical supply can provide the necessary maximum power
consump�on: refer to Sec�o
n 2.3.
• The volt
-
free relay contacts are isolated from the analyser mains circuits and from each
other, only 30 Vdc 1A max signal voltage circuits can be connected to the contacts.
•
The
mA output and RS485 terminals are separated from the analyser mains circuits by
reinforced insula�on. The terminals must only be connected to circuits that are
themselves separated from mains voltages by at least reinforced insula�on.
• All signal and electrical supply cables must be rated for temperatures of 70
°C
(158
°F
) or
h
igher.