Adding Rectifier Negative Information

To add a record in the Rectifier Negative Information mini-grid for each negative wire of a rectifier providing current to a pipeline(s), follow these steps:

1	Click the Select ROWs button to open the Select ROWs window (Figure 7-4). Select the pipeline segment(s) with the rectifier you want to work with, then click Save to close the window.

2	Open the Edit CPDM Data window. Click Data Entry > Edit CPDM Data.

3	Open the Rectifier Information grid. Click the Information tab and then the Rectifier button .

4	If you want to collapse the Selected ROWs panel to view more of the grid, click the Selected ROWs bar. Clicking the bar again expands the panel.

5	Select a row of records in the Rectifier Information grid with the rectifier you want to add negative records. For example, the record for pipeline segment T-1401 with rectifier R-202 is selected in the following figure (Figure 7-109).

6	If the Rectifier Negative Information mini-grid is not visible, double-click the Rectifier Negati... button to open the mini-grid. Click the minimize button in the upper right-hand corner of all other mini-grids to hide these mini-grids.

7	Click Add in the Rectifier Negative Information mini-grid to add an empty record. Fields requiring information include a red icon, such as the Name field.

8	Type a negative name in the Name field.

9	If the rectifier rating is different than the minimum and maximum values provided by PCS Axis in the fields Negative Current Min and Negative Current Max, type the rectifier rating in these fields.

10	Type a value in either the field labeled Negative Shunt Rating or Negative Shunt Resistance.

Note: If entering a shunt rating, enter it as a mV per A ratio using the format nn.n/nn.n, such as 50.0/25.0 for the shunt rating 50 mV/25 A. If entering a shunt resistance value, enter the actual resistance of the shunt in ohms. When both of these fields are empty, you can enter a value in the field Negative Shunt Factor instead. Otherwise, PCS Axis automatically calculates the shunt factor based on the value in the shunt rating or shunt reading field.

11	Click Refresh to update derived fields, such as Number of Negatives shown in Figure 7-109.

Note: For more information about derived fields, refer to Working with Derived Fields.

12	Repeat steps 7 through 11 to add a record for each remaining negative wire.

Note: PCS Axis displays the total number of negatives in the system calculated field labeled Number of Negatives in the Rectifier Information and Inspection grid. If the field is not present in your grid, refer to Adding a Data Grid Layout Theme to add the field.

Figure 7-109. Rectifier Negative Information