Yokogawa EJX438B - Manual (Page 66)

<8. Maintenance>
8-5
IM 01C27H01-01EN
8.4.4 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 8.3).
3) Pull out the Battery pack.
F0803.ai
The battery pack mounting
screws cannot be separated
from the battery pack so as
to prevent drop-off.
Figure 8.3 Removing the Battery Pack
■ Remounting
1) Insert the new battery pack lightly.
2) Push the center of the battery pack and insert it
securely.
3) Tighten the two battery pack mounting screws
to a torque of approximately 0.7 N·m.
4) Replace the terminal box cover.
8.4.5 Replacing the Batteries
The batteries in the battery pack can be replaced.
Batteries are not installed when shipped from the
factory. Assemble the battery pack as follows.
WARNING
Be sure to replace the batteries or disassemble
and assemble the battery pack in a safe location.
Doing so in an explosive area could cause an
explosion.
CAUTION
When replacing the batteries, be sure to replace
the two batteries at the same time and do not
use an old and a new battery together.
■ Disassembling
1) Loosen the two battery case mounting screws
(Figure 8.4).
2) Separate the battery case into two parts.
3) Remove the old batteries.
■ Assembling
1) Insert new batteries into the battery case. Be
careful of the orientation of the batteries.
2) Attach the two parts of the battery case to each
other.
3) Tighten the two battery case mounting screws
to a torque of approximately 0.7 N·m.
F0804.ai
The battery pack mounting screws
cannot be separated from battery
pack so as to prevent drop-off.
Figure 8.4 Removing the Battery Pack