Emerson Daniel 3415

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 3.2.4 to use the Daniel MeterLink
™
Transducer Swap-out
Wizard.
3.2.3 Replace the transformers
The following procedure shows how to replace a transformer module. Refer to Figure 3-1
and Figure 3-3.
Procedure
1. Disconnect the transducer cable from the transducer retainer by removing the
retaining clips and pulling the cable plug straight out. Do not twist or rotate the
plug.
2. Unscrew the transformer retainer from the holder using a 1 1/8” wrench.
3. Pull the transformer module from the transducer holder assembly.
4. Apply a small amount of Molykote 111 to the O-rings on the replacement
transformer module.
5. Plug the replacement transformer module into the transducer holder assembly. The
transformer is keyed and can only be installed one way.
Note
T-21 and T-41 transducers use W-01 transformers and T-22 transducers use W-02
transformers.
6. Place the transformer retainer over the transformer module. 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 and install retainer clips.
3.2.4 Modifying the calibration parameters
When transducer pairs, mounts, stalks or transducer holders are replaced, the
corresponding meter calibration parameters must be updated for accurate operation. This
means modifying the affected chord "L" dimension (LA... LD) (see Determining the “L”
Value below), average delay time (AvgDlyA... AvgDlyD) and delta delay time (DltDlyA...
DltDlyD) using the Daniel MeterLink Transducer Swap-out Wizard (see Figure 3-4).
Meter repairs
20 Gas Ultrasonic Flow Meter