Emerson Rosemount 3410 Series Maintenance And Troubleshooting Manual page 56

Meter repairs
January 2024
Procedure
1. Update average delay time and delta delay time. The transducer pair average delay
2. Update the chord lengths L of the transducers. The lengths of transducer assembly
3. Chord length "L" Calculation. The chord length "L" is calculated from the meter
56
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).
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 must be written
to the appropriate meter data points for each chord that received new transducer
housings and/or transducer stalks (LA... LD).
length as well as the lengths of transducer stalks, spacers and housings as shown in
the following equation.
Equation 3-2L: Chord L Dimension for T-200 transducer assemblies L = L
cℎord MeterHousing
− L
Housing2
where
L = Chord "L" dimension (in) (LA...LD)
chord
L = Meter housing length (in)
MeterHousing
L = Transducer 1 stalk length (in)
Stalk1
L = Transducer 2 stalk length (in)
Stalk2
L = Transducer 1spacer length (in)
Spacer1
L = Transducer 2 spacer length (in)
Spacer2
L = Transducer 1 housing length (in)
Housing1
L = Transducer 2 housing length (in)
Housing2
Maintenance and Troubleshooting Manual
− L − L − L
Stalk1 Spacer1 Housing1
00809-0600-3104
− L − L
Stalk2 Spacer2
Emerson.com/Rosemount