Micro Motion Manual: Replacing the Board Stack IFT9701 IFT9703 and Model 5300 Transmitters | Micro Motion Manuals & Guides

Replacing the Board Stack

IFT9701, IFT9703, and Model 5300
Transmitters

1 General guidelines

These instructions explain how to replace the circuit board stack for
Micro Motion
of three circuit boards should be replaced as a unit.

After the faulty board stack has been replaced, return it to Micro Motion for
failure analysis. For more information about returning the board stack, see
Section 9, page 6.

®

IFT9701, IFT9703, and Model 5300 transmitters. The stack

CAUTION

Improper replacement of the board stack could
damage the transmitter.

• To prevent electrostatic discharge, wear an anti-static
wrist strap while performing the board stack rep lacem ent
procedure.

• To prevent damage to circuit boards, make sure they do
not make contact with water or other contaminants.

• Handle the boards by their edges to avoid touching
electronic components.

• If a breaker bar is used for loosening the cover of the
circuit board compartment:

Apply steady pressure to avoid chipping the paint on

-

the transmitter housing. Chipped paint can result in
corrosion of the housing. If paint becomes chipped,
repaint the housing.
Do not apply too much pressure. Excessive torque can

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damage the pipeline, transmitter, or sensor.

• For perso nal and s ystem s af ety, follow all inst ructions to
ensure transmitter will operate properly.

CAUTION

Board stack replacement requires complete
reconfiguration of the flowmeter.

To reconfigure the flowmeter, refer to the instruction
manual that was shipped with the transmitter before
putting the transmitter back into service.

2 Parts in replacement kit

Compartment
cover

• Apply steady
pressure if
breaker bar is
used for loosening
cover

• Excessive torque
can damage
pipeline or
flowmeter

Lockout device
(optional)

Use a 4-mm
(5/32-inch) Allen
wrench to loosen
lockout screw

The board stack replacement kit includes:

• These instructions

• The 3-board stack, including attached mounting screws, in an anti-static
bag

• A tube of thread adhesive

3 Required tools

4 Removing the original circuit

board stack

Tools required for replacing the board stack include:

• 4-mm (5/32-inch) Allen wrench

• Number 2 Phillips-head screwdriver

To remove the board stack:

1. Make sure you are wearing an anti-static wrist strap.

2. Disconnect input power to the transmitter.

3. If the circuit board compartment has a lockout device, as shown in

Figure 1, use a 4-mm (5/32-inch) Allen wrench to loosen the lockout
screw. Lift the clamp from the slot and rotate the clamp out of the way.

4. Unscrew the circuit board compartment cover, shown in Figure 1.

WARNING

Explosion hazard

To avoid risk of explosion in an explosive atmosphere:

• Read label that points to compartment cover before
accessing field wiring compa rtment.

• Shut off power, and wait at least 2 minutes before
removing EEx d (circuit board) compartment cover

Figure 1.

2