Справочник Пользователя для Emerson Process Management 3420

June 2013

3-9000-743 Rev S

12.

Repeat 

 through

 for the remaining transducer assemblies which were 

replaced.

13.

 Check that the Daniel 3400 Series Gas Ultrasonic 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.

14.

Continue with 

 to use the Daniel MeterLink Transducer Swap- out Wizard.

7.2.4

Replace the transformers

If your meter is equipped with T-21 or T-22 transducers and you need to replace the transformer 
assemblies, use the following procedure. Refer to 

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.

6.

Place the retainer over the transformer assembly. Ensure the retainer threads are 

aligned correctly and hand-tighten. Use an 1 1/8” wrench and turn clockwise until fully 
seated in the transducer holder. 

Note: 

Do not over tighten the retainer.

7.

Plug the keyed chordset into the transformer assembly.

8.

Thread the cable nut onto the transducer retainer. Ensure the cable nut threads are 

aligned correctly and hand-tighten.