66
12. Repairs
<
WARNING
Risk of injury
At a minimum, the following safety measures
must be taken before any repairs:
•
Unauthorized persons must be kept away
•
Mark and secure the work area
•
Depressurize the product
•
Unlock the product and prevent it from being
restarted
•
Check to ensure live voltage is no longer
present
•
Ground and short-circuit the product
•
Cover any live parts in the surrounding area
•
Ensure that no explosive atmosphere is present
12.1 Replacement of signal transmitter
24-1072-2125
See Fig. 42 signal transmitter 24-1072-2125
<
DANGER
Danger caused by excessively high electrical
connected loads (P
i
U
i
I
i
)
An isolating amplifier must be inserted in between
if a signal transmitter will be used in a potentially
explosive atmosphere. The values required for
configuration of the isolating amplifier should be
taken from the classification as a simple electrical
equipment (page 2), and also from Chapter 4.2 .
Those values must never be exceeded!
Danger caused by incorrect tools or
equipment
Use only tools and clothing approved for use in
potentially explosive atmospheres (ESD).
The series 24-1072-2125 signal transmitter may be installed,
connected, and commissioned only by technical personnel. The
technical personnel must have detailed knowledge of the
various ignition protection ratings and the rules and regulations
for devices and equipment in potentially explosive atmospheres.
The applicable national regulations and rules must be observed.
•
Depressurize the signal transmitter (
1
).
12.1.1 with defective signal transmitter
•
Unscrew the cable socket (
2
) from the signal transmitter (
3
).
•
Attach box wrench (WAF 32) to the signal transmitter, detach
the signal transmitter.
•
Remove the signal transmitter (
3
) with O-ring (
4
).
12.1.2 with new signal transmitter
•
Use a finger to press the operating piston (
5
) into the signal
transmitter housing in order to check that it is running
smoothly.
•
At the signal transmitter (
3
), check the O-ring (
4
) for correct
seating.
•
Attach the signal transmitter (
3
) at the flow limiter (
1
) and
screw it in by hand.
•
Tighten the signal transmitter with a ring wrench (WAF 32)
Torque:
15 ± 1 Nm.
•
Screw the cable socket (
2
) onto the signal transmitter (
3
).
NOTE
Ensure that the cable of the cable socket is secured against
strain and twisting. Secure the cable accordingly if
necessary.
Fig. 42
Signal transmitter 24-1072-2125
