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WARNING - Process fluids and/or pressure
retained in the transmitter primary unit can cause
severe injury and death or damage to the
equipment. Plant Safety Procedures must be
followed when removing the instrument from
service or when draining or venting.
CAUTION - Dismantling and reassembly should
not be carried out on site because of the risk of
damage to components and printed circuits as a result
of adverse
environmental conditions such as
humidity,dust,etc. The dismantling and reassembly
procedures given below should be carried out in the
listed order to avoid instrument damage.
Required tools
2 mm Allen key
3 mm Allen key
Small Phillips screwdriver
Small flat-bladed screwdriver
13 mm spanner
13 mm torque wrench - (Range > 17 Nm - 12.6 foot lbs)
Dismantling
a) Screw down completely the cover locking screw, electronics
side, using the 3 mm Allen key
b) Unscrew and remove the covers
c) Unscrew the two fixing screws and remove the
secondary electronic assembly
d) Unplug the sensor cable
e) Remove the tang grub screw using the 2 mm Allen key
f) Unscrew the housing taking care not to damage the
sensor cable or the connector.
Blind cover
Extended
windowed cover
Analog, digital
output indicator or CoMeter
WARNING - L'elettronics unit
and transducer are inseparable parts
of the 600T Safety transmitters. Any
replace of these two parts outside
the factory will result of a less of the
claimed SIL.
DISMANTLING AND REASSEMBLY
Reassembly
fixing bolts and nuts and improper "O rings" can
cause fracture or overstressing of bolts and release
of pressurized process material. Use only official
spare parts and do not exceed the specified torque
limits. DO NOT REMOVE the "O ring" fitted in the
sensor neck: it provides the housing a degree of
protection.
a) Insert the sensor cable in its recess at the bottom of the
housing.
b) Screw the housing down completely until the nesting of
housing/sensor assy is reached, then unscrew by one
complete turn maximum. Rotate the topwork in the
desired position and lock it with the tang grub screw
previously removed.
c) Plug the sensor cable to the secondary electronics. Fix
the electronic circuit by its screws.
d) Refit the covers and tighten securely.
installations, at least eight (8) threads on the
cover must be engaged in order to meet the
flameproof (explosion-proof) requirements.
e) Unscrew the cover locking screw to secure the covers.
This is mandatory to meet "Flameproof requirements"
for Hazardous Areas installation.
Terminal blocks
assembly
Nameplate
Fig. 13 - Transmitter Sectional View
WARNING - Assembling flanges with incorrect
WARNING - For Hazardous Location
Calibration
screws
Tang screw
Secondary
electronics
Electronics screw
Sensor assembly
Blind cover
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