3.11
Meter sealing
3.11.1
Seal direct or remote mount transmitter electronics
enclosure
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 Allocation Ultrasonic Flow Meter after commissioning. The security seal wires
are commercially available.
Be sure to set the WRITE PROT. switch on the CPU Module to the
ON
position prior to
sealing the enclosure.
Use the following instructions to install the security seal wires on the Transmitter
Electronics Enclosure.
Figure 3-77: Transmitter electronics enclosure security latch
A. Transmitter Electronics Enclosure end cap
B. Security latch
Procedure
1. Rotate the end cap clockwise fully closing and compressing the end cap seal. Install
the Security latch using a 3 mm Allen wrench.
2. Install the security seal wire into and through one of the two holes in the end cap.
Choose holes that minimize counterclockwise rotation of the end cap when the
security wire is taut (maximum wire diameter .078 inch; 2.0 mm).
Maintenance and Troubleshooting Manual
Meter maintenance
00809-0100-3812
April 2022
Rosemount 3812 Liquid Ultrasonic Flow Meter
117
