Yokogawa EJX430B - Manual (Page 71)

<9. Maintenance>
9-6
IM 01C27B01-01EN
3) After the pressure-detector section has been
reassembled, a leak test must be performed to
verify that there are no pressure leaks.
4) Reattach the transmitter section to the
pressure-detector section.
5) Reattach the stopper and stopper bolt. Tighten
the five set screws. (Tighten the screws to a
torque of 1.5 N·m)
6) Install the CPU assembly according to
subsection 9.4.3.
7) After completing reassembly, adjust the zero
point and recheck the parameters.
Stopper
Stopper bolt
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Transmitter section
Pressure-detector
section
Cover flange
Capsule
gasket
Flange bolt
Setscrew
Nut
Figure 9.3 Removing and Mounting the Pressure-
detector Section
9.4.5 Replacing the Process Connector
Gaskets
This subsection describes process connector
gasket replacement. (See figure 9.4.)
(a) Loosen the two bolts, and remove the process
connectors.
(b) Replace the process connector gaskets.
(c) Remount the process connectors. Tighten the
bolts securely and uniformly to a torque shown
below, and verify that there are no pressure
leaks.
Model EJX110B, EJX310B, EJX430B
Torque(N·m)
{kgf·m}
39 to 49 {4 to 5}
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Bolt
Process connector
Process connector gasket
Figure 9.4 Removing and Mounting the Process
Connector
9.4.6 Replacing the Battery Pack
Regarding the transmitter with intrinsically safe
approval, the battery pack can be replaced without
removing the device in hazardous area.
■ Preparation
Initialize the remaining battery life by using the
parameter of Reset Energy Left in UAPMO block.
When the battery power is burned and emptied,
initialize the remaining battery after prompt
replacement of the battery pack.
■ Removing
1) Remove the terminal box cover.
2) Loosen the two battery pack mounting screws
(see Figure 9.5).
3) Pull out the Battery pack.
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The battery pack mounting
screws cannot be separated
from the battery pack so as
to prevent drop-off.
Figure 9.5 Removing the Battery Pack