Dismantling And Reassembly - ABB 2600T Series Instructions For Installation Manual

WARNING - Process fluids and/or pressure retained
in the transmitter primary unit can cause severe injury and
death or damage to the equipment. It is the user
responsibility to make sure that no pressure is applied
before removing the instrument from service or when
draining or venting.
Dangerous fluids.
In case of toxic or otherwise dangerous process fluid, take
any precautions as recommended in the relevant Material
Safety Data Sheet.
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 or digital
output indicator
- 14 -

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 (*) included
in the supplementary documentation, follow the
reassembly procedure herebelow described 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
b) Screw the housing down completely until the nesting of
c) Plug the sensor cable to the secondary electronics. Fix
d) Refit the covers and tighten securely.
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.
Once reassembled the process flanges and the transducer,
a pressure test is required. At this purpose, apply a hydrostatic
pressure of the maximum overrange pressure rating to both
process connections simultaneously. Wait for one minute,
then verify that no leakages occurred, otherwise repeat the
assembly procedure and the pressure test.
Calibration
Nameplate
Terminal
blocks
assembly
Sensor assembly
Transmitter Sectional View
WARNING - Assembling flanges with incorrect
housing.
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.
the electronic circuit by its screws.
WARNING - For Hazardous Location installations,
This is mandatory to meet "Flameproof requirements"
for Hazardous Areas installation.
PRESSURE TEST WARNING
screws
Tang
screw
Secondary electronic
Electronics screw
Blind cover