Emerson Daniel 3410 Series Maintenance And Troubleshooting Manual page 58

Meter repairs
August 2021
3.4.3 Modifying the calibration parameters
When T-200 transducer pairs, housings or stalks 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 ).
Generally, there are three types of situations that require updating delay times or both
delay times and length "L":
• Replacing T-200 transducer capsules only: need to update delta delay time only. No
change in length "L".
• Replacing T-200 transducer capsules and housings: need to update average and delta
delay times, and length "L".
• Replacing full T-200 transducer assemblies, including capsules, housings and stalks:
need to update average and delta delay times, and length "L".
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
3. Chord length "L" Calculation. The chord length "L" is calculated from the meter
58
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).
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).
length as well as the lengths of transducer stalks, spacers and housings as shown in
the following equation.
L = L
Equation 3-2: Chord "L" Dimension for T-200 transducer assemblies
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
Maintenance and Troubleshooting manual
− L − L − L
Stalk1 Spacer1 Housing1
Maintenance and Troubleshooting manual
DAN-20057317
− L − L
Stalk2 Spacer2