Emerson Rosemount 3408 User manual

Quick Start Guide
00825-0200-4418, Rev AA
October 2022
Rosemount™ 3408 Level Transmitter
Replacement of Electronic Deposit Box

1 About this guide
This guide provides instructions for replacing the Electronic Deposit Box
(EDB) on the Rosemount 3408 Level Transmitter. Refer to the Rosemount
3408 Reference Manual for more instructions.
1.1 Safety messages
WARNING
Failure to follow safe installation and servicing guidelines could result in
death or serious injury.
Ensure the transmitter is installed by qualified personnel and in accordance
with applicable code of practice.
For installations in hazardous locations, the transmitter must be installed
according to the Rosemount 3408 Product Certifications document and
System Control Drawing.
WARNING
Explosions could result in death or serious injury.
Before connecting a handheld communicator in an explosive atmosphere,
ensure the instruments are installed in accordance with intrinsically safe or
non-incendive field wiring practices.
In Explosion-proof/Flameproof and Non-Incendive/Type Ex ec installations,
do not remove the transmitter cover when power is applied to the unit.
The transmitter cover must be fully engaged to meet Explosion-proof/
Flameproof requirements.
WARNING
Electrical shock could cause death or serious injury.
Ensure the mains power to the transmitter is off and the lines to any other
external power source are disconnected or not powered while wiring the
transmitter.
WARNING
Process leaks could result in death or serious injury.
Ensure that the transmitter is handled carefully. If the process seal is
damaged, gas might escape from the tank.
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WARNING
Physical access
Unauthorized personnel may potentially cause significant damage to and/or
misconfiguration of end users’ equipment. This could be intentional or
unintentional and needs to be protected against.
Physical security is an important part of any security program and
fundamental to protecting your system. Restrict physical access by
unauthorized personnel to protect end users’ assets. This is true for all
systems used within the facility.
CAUTION
Hot surfaces
The flange and process seal may be hot at high process temperatures. Allow
to cool before servicing.
1.2 Product recycling/disposal
Recycling of equipment and packaging should be taken into consideration
and disposed of in accordance with local and national legislation or
regulations.
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2 Check the model code
Procedure
Check that the model code on the Electronic Deposit Box (EDB) is correct for
the application.
Figure 2-1: EDB Main Label
A
A. Model code
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3 Replace the Electronic Deposit Box (EDB)
Prerequisites
Make sure that the device is not exposed to moisture or dust.
Procedure
1. Disconnect the power supply.
2. Turn the jam screw clockwise until it is completely threaded into the
housing.
H2.5 mm
3. Remove the cover.
4. Remove the LCD display (if fitted).
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5. Make note of the cable routing and disconnect the cables from the
EDB.
Use a small screwdriver to press down and hold the terminal
connection open.
6. Loosen the three screws on the EDB, and then remove the EDB.
T20
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7. Gently insert the new EDB until it stops, and then firmly push it all the
way in.
8. Tighten the three screws, starting with the screw at position 1.
Torque 20 in-lb (2 N-m)
T20
1
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9. Connect the cable wires.
Note
When connecting a flexible (stranded) conductor, use a small
screwdriver to press down and hold the terminal connection open.
10. Snap the LCD display into place.
11. Attach and tighten the cover.
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a) Verify the cover jam screw is completely threaded into the
housing.
H2.5 mm
b) Attach and tighten the cover.
Note
Make sure the cover is fully engaged. There should be no gap
between the cover and the housing.
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c) Turn the jam screw counterclockwise until it contacts the
cover.
Note
Required for explosion-proof/flameproof installations only.
H2.5 mm
d) Turn the jam screw an additional ½ turn counterclockwise to
secure the cover.
12. Connect the power supply.
Postrequisites
Re-configure the device.
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