WARNING
CUTTING HAZARD
Sharp edges may be present on the transducer retaining ring.
Wear appropriate eye protection equipment when removing or installing the transducer
retaining ring.
Failure to comply could cause serious injury.
3.3.1
Remove the transducer holder with the extractor tool
To replace transducer holder while under pressure, refer to Ultrasonic Split Clamp
Extractor Tool Operation Manual.
Note
The extractor tool is used on Rosemount Model 3414 Ultrasonic Flow Meters and is not
applicable for use with Rosemount Model 3412 and Model 3411 Ultrasonic Flow Meters.
3.3.2
Remove the transducer holder without the extractor
tool
Rosemount 3410 Series Ultrasonic Gas Flow Meters utilize transducer holders that contain
the transducer assemblies and act as the pressure barrier between the transducers and the
fluid. Under normal maintenance such as transducer replacement, the transducer holders
do not need to be removed. If it is necessary to remove the transducer holders, the
following steps detail how to safely remove and reinstall them. Before removing and
installing the transducer holder, connect to the meter using MeterLink and collect and
save a Maintenance Log.
Procedure
1. Blow the line down according to the site standard operating procedures.
2. Ensure that the line pressure is down to atmospheric pressure prior to disassembly.
3. Disconnect the transducer cable nut. Pull the chordset from the transducer
assembly.
Note
Do not twist the chordset as you disconnect it from the transducer assembly (see
).
4. If the meter is equipped with T-21 or T-22 transducers, remove the transducer
retainer using a 1 1/8” wrench and then disconnect and remove the transformer
(
).
T-21 transducers use W-01 transformers and T-22 transducers use W-02
transformers.
5. Use a 1
¼
” (32 mm) wrench on the hex of the transducer holder and slowly unscrew
in a counterclockwise direction from the meter. If you hear gas leaking from the
threads, immediately stop and reinstall the holder as the meter has not been fully
Maintenance and Troubleshooting Manual
Meter repairs
00809-0600-3104
April 2022
Rosemount Gas Ultrasonic Flow Meters
55
