13.
Recheck the connections, wiring and switch settings before replacing the end caps.
14.
If replacing other electronics, continue with the following sections before replacing
the end caps and sealing the enclosure.
15.
If you are not replacing other electronics, replace the end caps, security latches,
reseal the meter and apply power. If required, 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 0.078 inch; 2.0 mm) (see
).
16.
Adjust the security wire, removing all slack and thread into the lead seal.
17.
Cut wire ends to remove excess wire.
18.
Apply power to the meter.
This completes the Backplane Board replacement procedure.
If you encounter problems with this procedure, see the Flow Lifecycle Services for
Rosemount
™
products contact information on the
front
cover of this manual.
I.S. Barrier Board replacement
Procedure
1. If replacing the I.S. Barrier board, remove power to the meter.
2. Disconnect the Transmitter Electronics Enclosure security seals, loosen the end cap
security latches with a 3mm Allen wrench and remove both end caps (see
).
3. Use a 3 mm flat head screw driver and remove the terminal blocks from the Power
Supply board, the CPU Module and the Optional I/O Module (if installed). See
for board locations and associated terminal blocks.
4. Use a Phillips head screw driver and remove the four Backplane board screws from
the enclosure standoffs. If the Local Display Module is installed on the Backplane,
use a flat blade screw driver and remove the four flat-head screws from the
standoffs.
5. Pull the Backplane board out of the enclosure. This disconnects the I.S. Barrier
Board. Lay the Backplane board down with the Acquisition Cable still attached (the
Power Supply board may remain attached to the Backplane when you remove it
from the enclosure).
Maintenance and Troubleshooting Manual
Meter repairs
00809-0600-3104
April 2022
Rosemount Gas Ultrasonic Flow Meters
81
