Emerson Rosemount 3812, Руководство по техническому обслуживанию и устранению неисправностей

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Electronics maintenance Tasks
Transmitter Electronics Enclosure
• Section 3.7.1 Replace the CPU Module (P/N
1-360-03-014)
• Section 3.7.2 Replace the fuse (Littlefuse
#218002.HXP)
• Section 3.7.3 Replace the Backplane (P/N
1-360-03-07)
• Section 3.7.5 Replace the Power Supply
Board (P/N 1-360-03-003)
Base Enclosure Electronics
• Section 3.7.6 Replace the Acquisition
Module for direct or remote mount
electronics (P/N 1-360-03-013)
• Section 3.7.7 Replace the Acquisition cable
(P/N 1-360-01-595)
Table 3-9: Electronics maintenance tools list
Tools required
7/16 inch (12 mm) wrench or channel lock pliers for transducer housing
Retaining ring pliers (Rosemount P/N 1-504-90-043)
1/8 inch (3mm) flat-blade screw driver (3mm)
1/4 inch (7 mm) flat-blade screw driver
3/8 inch drive ratchet wrench
3/8 inch drive - extension - at least 3.5" long
7/16 inch socket wrench
3mm Allen wrench (Rosemount P/N 2-4-9200-501)
3.9 Transmitter electronics maintenance
Should the meter require disassembly in the field (i.e., check boards, change switch
settings, or replace boards), to prevent electrostatic damage to the electronic boards,
always use a Ground Strap while handling the circuit boards. If one is not available, make
sure you are electrically discharged before touching the boards by first touching a metal
surface such as a ground lug on the meter body, piping or metal structure.
Maintenance and Troubleshooting Manual Meter maintenance
00809-0100-3812 April 2022
Rosemount 3812 Liquid Ultrasonic Flow Meter 91