9. For T-21 and T-22 transducers, Place the retainer over the transformer assembly,
ensure the retainer threads are aligned correctly and hand-tighten. Use a 1 1/8”
wrench and turn clockwise until the transformer assembly is fully seated in the
transducer holder.
Note
Do not over tighten the retainer.
10. Reconnect the transducer chordset to the transducer holder or the retainer if
installing T-21 or T-22 transducers. The internal connector of the transducer
chordset is keyed and will only go on one way. Secure the transducer cabling nut by
turning clock-wise. Ensure the cable nut threads are correctly aligned.
11. Repeat Step 1 through Step 10 for the remaining transducer assemblies which were
replaced.
12. Check that the Daniel 3410 Series Ultrasonic Gas Flow Meter is pressure tight.
Pressurize the meter to line pressure. Check for leaks around all mounts and
transducer holders, which were removed, using soapy water or other recognized
leak detector. If leaks are found, the meter must be vented to atmosphere and the
problem corrected. Check for leaks again. Continue the process until there are no
leaks.
13. Continue with Section 3.3.5 to use the Daniel MeterLink Transducer Swap-out
Wizard.
3.3.4
Replace transformers procedure
If your meter is equipped with T-21 or T-22 transducers and you need to replace the
transformers, use the following procedure. Refer to Figure 3-4 and Figure 3-6.
Procedure
1. Disconnect the transducer chordset from the transducer retainer by turning the
cable nut counter-clock wise.
Note
Do not twist the chordset as you disconnect it from the transformer.
2. Unscrew the retainer from the holder using a 1 1/8” wrench.
3. Pull the transformer assembly from the transducer holder assembly.
4. Apply a small amount of Molykote 111 to the O-rings on the replacement
transformer assembly.
5. Plug the replacement transformer assembly into the transducer holder assembly.
The transformer is keyed and can only be installed one way.
Note
T-21 transducers use W-01 transformers and T-22 transducers use W-02 transformers.
Meter repairs
Maintenance and Troubleshooting manual 53
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