Emerson Daniel 3415

11. Install the four Phillips head screws to secure the Backplane to the enclosure
standoffs.
12. Reinstall the terminal blocks on the CPU Module, Optional I/O Module (if installed),
and the Power Supply board using a 3 mm flat head screw driver.
NOTICE
Make sure the terminal blocks are aligned with the Guide Plate openings.
13. Recheck the connections, wiring and switch settings before replacing the end caps.
14. Continue with the following sections (if replacing other electronics) before replacing
the end caps and sealing the enclosure.
15. Replace the end caps, security latches, reseal the meter and apply power if you are
not replacing other electronics. 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.078 inch; 2.0 mm) (see Transmitter Electronics Enclosure security seals).
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
Daniel products contact information on the back cover of this manual.
I.S. Barrier Board replacement
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
Transmitter Electronics Enclosure security seals).
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
Figure 3-10 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).
Meter repairs
38 Gas Ultrasonic Flow Meter