2.15
Date Code 20090730 Instruction Manual SEL-734 Meter
Installation
Circuit Board Connections
Clock Battery
Refer to Figure 2.12 for clock battery location (front of main board). At room
temperature (25°C), a battery will nominally operate for 10 years at rated load.
The battery powers the meter clock (date and time) if the external power
source is lost or removed. Therefore, the battery life can extend beyond the
nominal 10 years if the meter is powered.
The battery is a 3 V lithium coin cell and cannot be recharged. The battery
voltage can be checked using the STA command (see Section 10:
Communications). The SEL-734 generates a warning when the battery voltage
is less than 2.3 Vdc.
There is danger of explosion if the
battery is incorrectly replaced.
Replace only with Ray-O-Vac
®
no.
BR2335 or equivalent recommended
by manufacturer. Dispose of used
batteries according to the
manufacturer’s instructions.
!
CAUTION
If the meter does not maintain the date and time after power loss, replace the
battery. Follow the instructions in Accessing the Meter Circuit Boards on
page 2.14 to remove the meter main board.
Remove the battery from beneath the clip and install a new one. The positive
side (+) of the battery faces up. Reassemble the meter as described in
Accessing the Meter Circuit Boards. Set the meter date and time via serial
communications port (see Section 10: Communications).
Courtesy of NationalSwitchgear.com
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