Procedure
1. Update average delay time and delta delay time. The transducer pair average delay
time and delta delay time are located on the transducer pair calibration sheet.
These values must be downloaded to the appropriate meter data points (AvgDlyA...
AvgDlyD, DltDlyA... DltDlyD).
2. Update the chord lengths "L" of the transducers. The lengths of transducer assembly
and individual components, including housing, spacer and stalk, are included on the
calibration sheet and are etched on the transducer housings, spacers and stalks.
The length of the meter body is found on the original calibration sheet supplied
with the meter. The value "L" is determined by subtracting the lengths of the
transducer stalks, spacers and housings from the length of the meter body. This
value should be written to the appropriate meter data points for each chord that
received new transducer housings and/or transducer stalks (LA... LD).
3. Chord length “L” Calculation. The chord length “L” is calculated from the meter
length as well as the lengths of transducer stalks, spacers and housings as shown in
the following equation.
Equation 3-2: Chord "L" Dimension for T-200 transducer assemblies
L
cℎord
= L
MeterHousing
− L
Stalk1
− L
Spacer1
− L
Housing1
− L
Stalk2
− L
Spacer2
− L
Housing2
where
L
chord
= chord “L” dimension (in) (LA…LD)
L
MeterHousing
= meter housing length (in)
L
Stalk1
= transducer 1 stalk length (in)
L
Stalk2
= transducer 2 stalk length (in)
L
Spacer1
= transducer 1spacer length (in)
L
Spacer2
= transducer 2 spacer length (in)
L
Housing1
= transducer 1 housing length (in)
L
Housing2
= transducer 2 housing length (in)
3.5 T-200 transducer capsule assembly removal
and installation
Figure 3-9: T-200 transducer capsule assembly
Meter repairs Maintenance and Troubleshooting manual
August 2021 P/N 3-9000-791
60 Models 3415, 3416 and 3417 GUSM
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