Reference, Installation, and Operations Manual

Section 7: Maintenance and troubleshooting

3-9000-743 Rev S

June 2013

 

 

 

7.2.5Modifying the Calibration Parameters

When transducer pairs 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.

After running the Daniel MeterLink Transducer Swap- out Wizard and writing the new chord parameters to the meter, collect and save a Maintenance log (Logs/Reports menu) and a Configuration file (Tools>Edit/Compare Configuration).

Average Delay Time and Delta Delay Time Modifications

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). The lengths of the transducers are also included on the calibration sheet and are etched on the transducers. Likewise the lengths of the stalk assemblies, transducer holders, and mounts are etched on the individual components. The length of the meter body is found on the original calibration sheet supplied with the meter.

Determining the “L” Value

The value “L” is determined by adding the length of the meter body to the lengths of the two mounts and subtracting the lengths of the transducer holders, stalk assemblies, and transducers. This value should be written to the appropriate meter data points for each chord that received new transducers (LA ...LD). See Equation B-5for the “L” dimension calculation.

Figure 7-9 Daniel MeterLink Transducer Swap-out Wizard

Modifying the Calibration Parameters

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