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Installation manual
00825-0100-3812
3.6.7
External power source connection and fuse
Located inside the Transmitter Electronics Enclosure is a connector for a user-
provided external power source, a 2 Ampere fuse and a 24 V loop power
connection for ultrasonic meter analog outputs, generator temperature or
pressure transmitter devices. The current is limited to 88 mA.
Figure 3-7: CPU Module power source connections
A. Power In connector (main power)
B. 24 V Loop power
C. 2 Ampere fuse (used for the main power input)
3.7
Security seal installation
Security seals protect the integrity of the meter metrology and prevent tampering
with transducer assemblies. The following sections detail how to properly seal the
Rosemount 3812 Liquid Ultrasonic Flow Meter after commissioning. The security
seal wires are commercially available.
WARNING
CUTTING HAZARD
Sharp edges may be present on the meter.
Wear appropriate personal protective equipment when working on the meter.
Failure to comply can cause serious injury to personnel.
Be sure to set the WRITE PROT. switch on the CPU Module to the ON position
prior to sealing the enclosure.
3.7.1
Direct or remote mount transmitter electronics
enclosure seal
Use the following instructions to install the security seal wires on the Transmitter
Electronics Enclosure.
Installation manual
Electrical Installation
January 2023
59
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