ABB XSeriesG4 User Manual page 127

Open PCCU.
Select the Calibration button from the toolbar. The Flow Computer is now placed in Hold.
Select the desired measurement tube from the tree view in the left pane.
Select SP from the calibration drop down box to the left of the pressure marker table.
Select the SP type: Absolute or Gauge.
IMPORTANT NOTE: Absolute will display values with Barometric Pressure added in plus entered values will
need the Barometric Pressure added. Gauge will display values in Gauge Pressure plus entered values will need
to be in Gauge Pressure.
Click on the Enter Pressure Check Value.
Select Continuous to update the Current Reading.
Verify that the vent valve is closed (Figure 92:).
Open both the high and low equalizer valves.
Close both the downstream and upstream tap valves.
Open the atmospheric vent valve.
Enter a pressure marker for atmospheric pressure (psia).
Enter zero if in Gauge Mode, or the Barometric Pressure (or contract value) if in the Absolute mode.
Click OK.
Close the atmospheric vent valve.
Click on the Enter Pressure Check Value.
Connect Calibration Standard to calibration test port.
Pressure to the next desired verification pressure.
Enter the pressure value from the calibration source, once the current reading stablizes.
IMPORTANT NOTE: Add the Barometric pressure if the pressure type is Absolute.
Click OK.
Repeat steps 11 through 14 for each pressure check value.
Determine if Calibration is required once all Static Pressure markers have been set.
Return the manifold to service before exiting Calibration mode if no Calibration is required,
Static pressure calibration checks have been performed.
IMPORTANT NOTE: For additional information regarding Static Pressure Calibration Checks, see PCCU Help
Files.
6.13.4 Differential Pressure (DP) Calibration Checks
It is recommended that checks of the differential pressure (DP) be done prior to and directly following calibration.
A minimum of three Differential Pressure markers should be set, however the user may enter as many DP pressure markers as
you desire. Recording too many markers may cause the flow computer to overwrite existing older events. Only the last five
checks are used by the WinCCU editor for calibration adjustment. Enter a 0%, 25, 50%, 75% and a 100% value.
128 XFC G4 2103335 Rev AB